CN113958033A - Construction method of assembled prefabricated wall - Google Patents
Construction method of assembled prefabricated wall Download PDFInfo
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- CN113958033A CN113958033A CN202010635029.2A CN202010635029A CN113958033A CN 113958033 A CN113958033 A CN 113958033A CN 202010635029 A CN202010635029 A CN 202010635029A CN 113958033 A CN113958033 A CN 113958033A
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- building block
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- prefabricated wall
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/02—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls built-up from layers of building elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/94—Protection against other undesired influences or dangers against fire
- E04B1/945—Load-supporting structures specially adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/02—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls built-up from layers of building elements
- E04B2/14—Walls having cavities in, but not between, the elements, i.e. each cavity being enclosed by at least four sides forming part of one single element
- E04B2/26—Walls having cavities in, but not between, the elements, i.e. each cavity being enclosed by at least four sides forming part of one single element the walls being characterised by fillings in all cavities in order to form a wall construction
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/02—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls built-up from layers of building elements
- E04B2002/0202—Details of connections
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses a construction method of an assembled prefabricated wall, which comprises the following steps of: step 1, leveling a base layer; step 2, arranging blocks and building bricks; step 3, placing longitudinal steel bars; step 4, pre-burying the pipeline, the groove and the pre-buried part; step 5, placing horizontal tie bars; step 6, plugging two sides of the wall end; step 7, mixing slurry, grouting or core pouring concrete; step 8, vibrating; step 9 repeats steps 5 through 8 until completed. By the mode, the industrial parts can be integrally manufactured in advance in a factory; the durability and the fireproof performance are high, and energy conservation and emission reduction are realized; the integrity and the safety of the building wall are improved; the construction period is shortened, and the comprehensive cost is reduced; environmental protection and energy conservation.
Description
Technical Field
The invention relates to an improvement of a wall construction method, in particular to an industrialized part which is integrally manufactured in advance in a factory except for a connecting node area between components; the durability and the fireproof performance are high, and energy conservation and emission reduction are realized; the integrity and the safety of the building wall are improved; the construction speed can be ensured, the construction period is shortened, and the comprehensive cost is reduced; the construction method of the assembled prefabricated wall body has the advantages of environmental protection, energy conservation and improvement of the utilization efficiency of resources.
Background
The fabricated building is a building fabricated on site by using prefabricated parts. The development of the assembly type building is a great change of the construction mode, is an important measure for promoting the structural reform of the supply side and the novel urbanization development, is favorable for saving resource and energy, reducing construction pollution, improving labor production efficiency and quality safety level, and is favorable for promoting the deep integration of the building industry and the information-based industrialization, cultivating new kinetic energy of new industry and promoting the excess capacity of chemical solution.
The implementation of the strategy of sustainable development and the enhancement of ecological construction and environmental protection is a basic national policy in China. The building material innovation is an important measure for protecting land resources, saving energy, comprehensively utilizing resources and improving the environment, and is also an important content of a sustainable development strategy. With the increase of people's mouth in our country, economy continues to develop rapidly, the pressure of resources and environment is getting bigger, must fundamentally change the conditions that traditional building materials occupy a large amount of cultivated land, consume energy, pollute the environment, vigorously develop and popularize and apply novel building materials, form the emerging industry that is compatible with sustainable development
The traditional masonry mode adopts a mortar masonry construction process, and the adopted bricks are mostly regular cuboids; the durability and the fire resistance of the built wall are poor; the problems of 'crack, leakage' and the like existing in the wall body; the construction period is long and the construction cost is high.
Disclosure of Invention
The invention mainly solves the technical problem of providing an industrialized part which is integrally manufactured in advance in a factory except a connecting node area between components; the problem that the existing thermal insulation material for the building outer wall is poor in durability and fireproof performance is effectively solved, and the national industrial development policy of energy conservation and emission reduction is met; the integral rigidity of the wall is improved, cracking resistance and earthquake resistance are facilitated, the problems of 'cracks, leakage' and the like existing in the wall can be effectively solved, and the integrity and the safety of the building wall are improved; the construction speed can be ensured, the construction period is shortened, the comprehensive cost is reduced, and the comprehensive energy-saving effect and the economic benefit of the whole wall are comprehensively improved; the matching technology is mature, and the technical specification is perfect. The method for constructing the assembled prefabricated wall body accords with the policy of the state advocating the vigorous development of the assembled building, promotes the industrial development of building materials, effectively protects cultivated land and environment, saves energy, improves the utilization efficiency of resources, relieves the contradiction between the economic and social development and the resource environment, and enhances the sustainable development capability.
In order to achieve the purpose, the technical scheme adopted by the invention is an assembled prefabricated wall construction method, which comprises the following steps in sequence:
step 1, leveling a base layer; leveling the operation surface by using 1:2 cement mortar base slurry, and covering an isolation layer on a leveling layer before brick placing;
step 2, arranging blocks and building bricks; and (4) arranging blocks and building bricks on the leveling layer according to a design drawing. The upper skin and the lower skin of the mold clamp building block are lapped to the hole and the staggered joint, and the holes can be poured in a staggered mode when the holes cannot be poured in individual conditions, and the lapping length of the holes is not smaller than 90 mm. The rib surface of the mould clamping building block is upward (namely the mould clamping building block is positively built), the tongue-and-groove surfaces are aligned and clamped firmly with each other, the inner surface and the outer surface are flush, the mould clamping building block with 400mm multiplied by 200mm multiplied by 150mm is taken as a main part, and a matching block is taken as an auxiliary part;
step 3, placing longitudinal steel bars; placing vertical reinforcing steel bars, wherein the space and the position of the reinforcing steel bars are required according to a design drawing;
step 4, pre-burying the pipeline, the groove and the pre-buried part; pre-burying pipelines, grooves, pre-buried parts and the like in a wall body according to a design drawing, and pre-burying the pipelines by utilizing horizontal and vertical slotted holes;
step 5, placing horizontal tie bars; the space between the tie bars meets the design requirement;
step 6, plugging two sides of the wall end; before the assembled prefabricated wall is grouted, two ends of the wall body are plugged, so that grouting materials are prevented from overflowing from the two ends when the grouting materials are poured;
step 7, mixing slurry, grouting or core pouring concrete; when the hole grouting slurry is poured into the assembled prefabricated wall, the common formwork clamp masonry can be poured for three to four layers each time; the heat-preservation mold clamping building blocks are poured one by one, water is strictly forbidden to be used for grouting and crack pouring, and the operation method of filling mortar joints by stones, wood tenons and the like is not needed; when pouring, a special inserted vibrating rod is used for vibrating and compacting, and grouting material is secreted out of a masonry gap; if no grouting material is secreted out of the masonry gap, the hammer method can be used to listen to the sound to distinguish whether the masonry gap is compact or not;
step 8, vibrating; when the assembled prefabricated wall is grouted, the insulation boards among the mold clamp blocks are inserted firstly, then grouting is carried out once for each block, and a special inserted vibrating rod is adopted for vibrating density during grouting so as to prevent the insulation boards from floating upwards; after grouting, the residual grouting material on the upper opening of the insulation board is cleaned in time, so that the insulation board is ensured to be continuous up and down, and the cold and hot bridge phenomenon generated during secondary stacking is prevented from influencing the insulation effect;
step 9 repeats steps 5 through 8 until completed.
Preferably, the upper skin and the lower skin are lapped to the hole or the staggered joint when the die clamping building blocks are arranged; when holes cannot be aligned, the overlap length of the staggered holes is not less than 90 mm; when the requirements cannot be met, the horizontal seam is arranged
And the distance between the two ends of the tie bar and the vertical seam is not less than 400mm, and the vertical through seam does not exceed the two-skin mold clamping building block.
Preferably, during construction in a rainy period, the construction of the heat-preservation mold clamping block masonry should be stopped, and a rainproof measure should be adopted in the common mold clamping block masonry construction to prevent rainwater from entering the wall; when the construction is continued after rain, the verticality of the wall body needs to be checked; the consistency of the grouting slurry should be reduced appropriately according to the actual situation.
Preferably, when the average outdoor daily temperature is continuously kept for 5 days and is stably lower than 5 ℃ or the temperature suddenly drops, winter is adopted in time; and (4) construction measures, namely removing the measures of winter construction when the average outdoor daily temperature is continuously higher than 5 ℃ for 5 days.
Preferably, the mold clamping block comprises: the building block comprises a common mold clamping building block, a heat preservation mold clamping building block, a reinforced common mold clamping building block and a reinforced heat preservation mold clamping building block.
Preferably, the compression strength grade of the common mould clamping block and the heat preservation mould clamping block is as follows: MU5.0, MU7.5 and MU 10.0; the compressive strength grade of the common reinforced mould clamping block and the reinforced heat-preservation mould clamping block is as follows: MU10.0, MU15.0 and MU 20.0.
Preferably, Mb10, Mb7.5 and Mb5 are used as the strength grade of the grouting slurry.
Preferably, the strength grade of the pouring hole concrete is not less than Cb 20; the slump of the concrete for pouring the hole is more than 200mm, and the maximum particle of the aggregate is not more than 16 mm; and concrete members such as constructional columns, ring beams and horizontal tie beams in the mould clamping building block masonry are not less than C20 in concrete strength grade.
Preferably, when the mold clamping building block hole is grouted, a temporary supporting measure can be arranged at the opening of the door and window to prevent the mold clamping building block from shifting.
The invention has the beneficial effects that: the invention relates to a construction method of an assembled prefabricated wall, which can integrally manufacture industrialized parts in advance in a factory except for a connecting node area between components; the assembled prefabricated wall is based on the advantages of a self-heat-preservation structural system, and combines the requirements of the existing assembled prefabricated industrialization, so that the integration of the wall body and heat preservation is realized, the problems of poor durability and fire resistance of heat preservation materials commonly existing in the current building outer wall are effectively solved, and the industrial development policy of national energy conservation and emission reduction is met; the assembled prefabricated wall is based on the unique bayonet structure of the mold clamping building blocks, changes the traditional mortar masonry process, adopts joggle joint through industrial production, uses pouring hole concrete for grouting after stacking, forms a net structure on the wall, improves the integral rigidity of the wall, is beneficial to crack resistance and earthquake resistance, can effectively solve the problems of 'cracks, leakage' and the like existing in the wall, and improves the integrity and the safety of the building wall; the assembled prefabricated wall system overcomes the problems of high cost of the existing concrete prefabricated part, large using amount of building templates and the like, can ensure the construction speed, shorten the construction period, reduce the comprehensive cost, comprehensively improve the comprehensive energy-saving effect and the economic benefit of the whole wall body, and has the innovation and demonstration leading effects on implementing the sustainability of the resource utilization of China, promoting and improving the development of the building wall body materials of China to the comprehensive energy-saving and land-saving directions; the matching technology of the assembled prefabricated wall is mature, and the technical specification is perfect; the method conforms to the national policy of advocate leading to the vigorous development of the fabricated building and promotes the industrial development of building materials; the popularization and the application of the assembled prefabricated wall can effectively protect cultivated land and environment, save energy, improve the utilization efficiency of resources, relieve the contradiction between economic and social development and resource environment and enhance the sustainable development capability.
Detailed Description
The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to more readily understand the advantages and features of the present invention and to clearly and unequivocally define the scope of the present invention.
The invention comprises the following steps:
in order to solve the technical problems, the invention adopts a technical scheme that the construction method of the assembled prefabricated wall body is sequentially carried out according to the following steps:
step 1, leveling a base layer; leveling the operation surface by using 1:2 cement mortar base slurry, and covering an isolation layer on a leveling layer before brick placing;
step 2, arranging blocks and building bricks; and (4) arranging blocks and building bricks on the leveling layer according to a design drawing. The upper skin and the lower skin of the mold clamp building block are lapped to the hole and the staggered joint, and the holes can be poured in a staggered mode when the holes cannot be poured in individual conditions, and the lapping length of the holes is not smaller than 90 mm. The rib surface of the mould clamping building block is upward (namely the mould clamping building block is positively built), the tongue-and-groove surfaces are aligned and clamped firmly with each other, the inner surface and the outer surface are flush, the mould clamping building block with 400mm multiplied by 200mm multiplied by 150mm is taken as a main part, and a matching block is taken as an auxiliary part;
step 3, placing longitudinal steel bars; placing vertical reinforcing steel bars, wherein the space and the position of the reinforcing steel bars are required according to a design drawing;
step 4, pre-burying the pipeline, the groove and the pre-buried part; pre-burying pipelines, grooves, pre-buried parts and the like in a wall body according to a design drawing, and pre-burying the pipelines by utilizing horizontal and vertical slotted holes;
step 5, placing horizontal tie bars; the space between the tie bars meets the design requirement;
step 6, plugging two sides of the wall end; before the assembled prefabricated wall is grouted, two ends of the wall body are plugged, so that grouting materials are prevented from overflowing from the two ends when the grouting materials are poured;
step 7, mixing slurry, grouting or core pouring concrete; when the hole grouting slurry is poured into the assembled prefabricated wall, the common formwork clamp masonry can be poured for three to four layers each time; the heat-preservation mold clamping building blocks are poured one by one, water is strictly forbidden to be used for grouting and crack pouring, and the operation method of filling mortar joints by stones, wood tenons and the like is not needed; when pouring, a special inserted vibrating rod is used for vibrating and compacting, and grouting material is secreted out of a masonry gap; if no grouting material is secreted out of the masonry gap, the hammer method can be used to listen to the sound to distinguish whether the masonry gap is compact or not;
step 8, vibrating; when the assembled prefabricated wall is grouted, the insulation boards among the mold clamp blocks are inserted firstly, then grouting is carried out once for each block, and a special inserted vibrating rod is adopted for vibrating density during grouting so as to prevent the insulation boards from floating upwards; after grouting, the residual grouting material on the upper opening of the insulation board is cleaned in time, so that the insulation board is ensured to be continuous up and down, and the cold and hot bridge phenomenon generated during secondary stacking is prevented from influencing the insulation effect;
step 9 repeats steps 5 through 8 until completed.
When the die clamping building blocks are placed, the upper and lower skins are correspondingly lapped with the holes or the staggered joints; when holes cannot be aligned, the overlap length of the staggered holes is not less than 90 mm; when the requirements cannot be met, the horizontal seam is arranged
And the distance between the two ends of the tie bar and the vertical seam is not less than 400mm, and the vertical through seam does not exceed the two-skin mold clamping building block.
During construction in a rainy period, the construction of the heat-preservation mold-clamped building block masonry is stopped, and a common mold-clamped building block masonry construction needs to take rainproof measures to prevent rainwater from entering a wall body; when the construction is continued after rain, the verticality of the wall body needs to be checked; the consistency of the grouting slurry should be reduced appropriately according to the actual situation.
When the average outdoor daily temperature is continuously below 5 ℃ for 5 days or the temperature suddenly drops, winter is adopted in time; and (4) construction measures, namely removing the measures of winter construction when the average outdoor daily temperature is continuously higher than 5 ℃ for 5 days.
The materials used in winter construction should meet the following regulations:
the molded block which is frozen after being poured or soaked in water can not be used.
The sand and aggregate used for mixing the grouting hole slurry and the constructional column concrete can not contain ice blocks and frozen blocks with the diameter of more than 10mm
In winter, after the construction is carried out in the holes of the mold clamp masonry bodies and grouting is carried out, the newly built wall bodies are covered in time.
In winter construction, the designed hole grouting slurry with the strength grade lower than Mb7.5 is improved by one grade compared with normal-temperature construction, and the temperature in use is not lower than 5 ℃.
Besides the conventional requirements, the winter construction diary records the outdoor air temperature, the temperature of the grouting slurry during hole grouting, the admixture mixing amount and other related data.
The winter construction of the constructional column concrete is carried out according to relevant regulations in the current industry standard JGJ/T104 of construction engineering winter construction regulations and the current national standard GB50204 of concrete structure engineering construction quality acceptance regulations.
The mold clamping building block comprises: common mold clamping building blocks, heat preservation mold clamping building blocks, common reinforcement mold clamping building blocks and heat preservation reinforcement mold clamping building blocks.
The compression strength grade of the common mould clamping building block and the heat preservation mould clamping building block is as follows: MU5.0, MU7.5 and MU 10.0; the compressive strength grade of the common reinforced mould clamping block and the reinforced heat-preservation mould clamping block is as follows: MU10.0, MU15.0 and MU 20.0.
The strength grades of the grouting slurry should adopt Mb10, Mb7.5 and Mb 5.
The strength grade of the pouring hole concrete is not less than Cb 20; the slump of the concrete for pouring the hole is more than 200mm, and the maximum particle of the aggregate is not more than 16 mm; and concrete members such as constructional columns, ring beams and horizontal tie beams in the mould clamping building block masonry are not less than C20 in concrete strength grade.
The design value of the compression strength of the formwork-clamped building block masonry poured by the grouting hole slurry is adopted according to the specification of the table 1
TABLE 1 design value of compression strength (MPa) of grouting masonry with formworks and blocks
Note: the newly-built masonry with unhardened grouting slurry can be determined according to the fact that the strength of the grouting slurry is zero, and the design value of the compression strength of the masonry is determined.
When the construction quality control grade is B grade, the shear strength design value of the formwork clamping masonry is calculated by the hair section with the age of 28d, and the shear strength design value is adopted according to the specification of the table 2
TABLE 2 shear strength design value (MPa) of grouting masonry block of mold clamp
Note: when the concrete hole is filled by adopting Cb20 or above grade concrete in the formwork clamping building block, the design value of the shear strength of the common formwork clamping masonry is 0.47MPa, and the design value of the shear strength of the heat-preservation formwork clamping masonry is 0.38 MPa.
When the mold clamping building block hole is grouted, a temporary supporting measure can be arranged at the opening of the door and window, so that the mold clamping building block is prevented from shifting.
The height-thickness ratio beta of the construction requirement wall is calculated according to the following formula: beta is H0/h≤μ1μ2[β]
H0-the calculated height of the wall;
h-wall thickness;
μ1the correction coefficient of the allowable high-thickness ratio of the self-bearing wall is adopted according to the table 3;
μ2the correction coefficient of the allowable height-thickness ratio of the wall with the door and window openings is obtained;
[ beta ] -the allowable height to thickness ratio of the wall should be taken as in Table 4.
TABLE 3 non-bearing wall [ beta ]]Correction coefficient mu of1
| Wall thickness h (mm) | 200(225) | 120 |
| μ1 | 1.28 | 1.44 |
Note: the allowable height-thickness ratio of the upper end wall is the free end wall, and can be improved by 30 percent besides the improvement according to the specification.
TABLE 4 allowable high wall thickness ratio [ beta ]
| Strength grade of hole-filling material | Wall with a plurality of walls |
| Mb 5 | 24 |
| ≥Mb 7.5 | 26 |
Note: and (5) when the height-thickness ratio of the newly-built formwork clamp block masonry which is not hardened in the construction stage is checked, the height-thickness ratio is allowed to be taken 14.
When the distance S between two adjacent transverse walls connected with the wall is less than or equal to mu1μ2[β]And h, the height-thickness ratio of the wall can be not limited by the bar.
μ2＝1-0.4bs/s
bs-total width of door and window opening within width S
S-distance between adjacent transverse walls or constructional columns
According to the calculated mu2When the value is less than 0.7, 0.7 should be adopted; when the height of the opening is equal to or less than 1/5 of the wall height, mu is preferable2Equal to 1.0. When the height of the opening is greater than or equal to 4/5 of the height of the wall, the height-thickness ratio can be calculated according to the independent wall section.
In order to prevent or alleviate the vertical cracks of the wall body caused by temperature difference and masonry dry shrinkage under the normal use condition of the house, an expansion joint is arranged in the wall body. The expansion joint should be set up in the place that probably causes stress concentration, brickwork to produce the crack possibility the biggest because of temperature and shrinkage deformation. The distance between the expansion joints can be adopted according to the table 5
TABLE 5 maximum distance (m) of expansion joints of formblock masonry house
When the foundation is soft and the building object type is complex, settlement joints are preferably arranged at the following parts: the height difference of the vertical surface of the house is more than 6 m; the house has staggered floors, and the height difference of the floor slab is large; the compressibility of the foundation soil has obvious difference; building structure (or foundation) type differences; house junctions built by stages; the width of the settlement joint must meet the anti-seismic requirement and can be adopted according to the table 6
Table 6 House settlement joint width (mm) meeting earthquake-proof requirements
| Number of stories of house | Width of the seam |
| Two to three | 70～100 |
| Four to seven | 120～180 |
Note: when the number of layers of the units at the two sides of the settlement joint is different, the seam width is adopted according to the higher number of layers.
The allowable variation in the dimensions of the build columns should be in accordance with the specifications of table 7.
TABLE 7 construction of allowable deviations in column dimensions
The cast-in-place concrete ring beam can be directly cast and tamped on the grouted mould clamp building blocks according to the design requirements. The cast-in-place ring beam concrete is poured into the lower portion of the blocking block of the lower module, wherein the distance between the blocking block and the blocking block is 40-50 mm.
The wall without floor or roof construction can allow the free height not to exceed the specification of the table 8 when the strong wind is likely to be met, otherwise, effective measures such as temporary support and the like must be added.
TABLE 8 wall allowable free height (m)
Note: the table is suitable for the condition that the relative elevation (H) of a construction position is within a range of 10 m. If H is more than 10m and less than or equal to 15m and H is more than 15m and less than or equal to 20m, the allowed free height values in the table should be multiplied by 0.9 and 0.8 respectively; for example, when H > 20m, the allowable free height should be determined by the overturn-proof calculation.
When the wall poured has transverse walls or other structures connected with the transverse walls and the distance is less than 2 times of the list limit value, the pouring height can not be limited by the meter.
When the modular block masonry density is less than 1300 kg/m 3, the allowable free wall height should be determined by separate tests.
When the assembled prefabricated wall is built, the production is different from the horizontal laying production of other prefabricated walls, but is the vertical laying production, the space range is fully utilized, and the production land is greatly saved. After the production of the wall body is finished, the wall body is only required to be moved to a place for centralized placement, the processes of demolding, hoisting and the like are saved, and the production time is also saved to a certain extent.
The invention has the beneficial effects that: the invention relates to a construction method of an assembled prefabricated wall, which can integrally manufacture industrialized parts in advance in a factory except for a connecting node area between components; the assembled prefabricated wall is based on the advantages of a self-heat-preservation structural system, and combines the requirements of the existing assembled prefabricated industrialization, so that the integration of the wall body and heat preservation is realized, the problems of poor durability and fire resistance of heat preservation materials commonly existing in the current building outer wall are effectively solved, and the national industrial development policy of energy conservation and emission reduction is met; the assembled prefabricated wall is based on the unique bayonet structure of the mold clamping building blocks, changes the traditional mortar masonry process, adopts joggle joint through industrial production, uses pouring hole concrete for grouting after stacking, forms a net structure on the wall, improves the integral rigidity of the wall, is beneficial to crack resistance and earthquake resistance, can effectively solve the problems of 'cracks, leakage' and the like existing in the wall, and improves the integrity and the safety of the building wall; the assembled prefabricated wall system overcomes the problems of high cost of the existing concrete prefabricated part, large using amount of building templates and the like, can ensure the construction speed, shorten the construction period, reduce the comprehensive cost, comprehensively improve the comprehensive energy-saving effect and the economic benefit of the whole wall body, and has the innovation and demonstration leading effects on implementing the sustainability of the resource utilization of China, promoting and improving the development of the building wall body materials of China to the comprehensive energy-saving and land-saving directions; the matching technology of the assembled prefabricated wall is mature, and the technical specification is perfect; the method conforms to the national policy of advocate leading to the vigorous development of the fabricated building and promotes the industrial development of building materials; the popularization and the application of the assembled prefabricated wall can effectively protect cultivated land and environment, save energy, improve the utilization efficiency of resources, relieve the contradiction between economic and social development and resource environment and enhance the sustainable development capability.
The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the present invention, and not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.
Claims (9)
1. A construction method of an assembled prefabricated wall body is characterized in that: the method comprises the following steps:
step 1, leveling a base layer; leveling the operation surface by using 1:2 cement mortar base slurry, and covering an isolation layer on a leveling layer before brick placing;
step 2, arranging blocks and building bricks; and (4) arranging blocks and building bricks on the leveling layer according to a design drawing. The upper skin and the lower skin of the mold clamp building block are lapped to the hole and the staggered joint, and the holes can be poured in a staggered mode when the holes cannot be poured in individual conditions, and the lapping length of the holes is not smaller than 90 mm. The rib surface of the mould clamping building block is upward (namely the mould clamping building block is positively built), the tongue-and-groove surfaces are aligned and clamped firmly with each other, the inner surface and the outer surface are flush, the mould clamping building block with 400mm multiplied by 200mm multiplied by 150mm is taken as a main part, and a matching block is taken as an auxiliary part;
step 3, placing longitudinal steel bars; placing vertical reinforcing steel bars, wherein the space and the position of the reinforcing steel bars are required according to a design drawing;
step 4, pre-burying the pipeline, the groove and the pre-buried part; pre-burying pipelines, grooves, pre-buried parts and the like in a wall body according to a design drawing, and pre-burying the pipelines by utilizing horizontal and vertical slotted holes;
step 5, placing horizontal tie bars; the space between the tie bars meets the design requirement;
step 6, plugging two sides of the wall end; before the assembled prefabricated wall is grouted, two ends of the wall body are plugged, so that grouting materials are prevented from overflowing from the two ends when the grouting materials are poured;
step 7, mixing slurry, grouting or core pouring concrete; when the hole grouting slurry is poured into the assembled prefabricated wall, the common formwork clamp masonry can be poured for three to four layers each time; the heat-preservation mold clamping building blocks are poured one by one, water-flushing grouting and crack pouring are strictly forbidden, and the operation method of filling mortar joints by stones, wood tenons and the like is not adopted; when pouring, a special inserted vibrating rod is used for vibrating and compacting, and grouting material is secreted out of a masonry gap; if no grouting material is secreted out of the masonry gap, the hammer method can be used to listen to the sound to distinguish whether the masonry gap is compact or not;
step 8, vibrating; when the assembled prefabricated wall is grouted, the insulation boards among the mold clamp blocks are inserted firstly, then grouting is carried out once for each block, and a special inserted vibrating rod is adopted for vibrating density during grouting so as to prevent the insulation boards from floating upwards; after grouting, the residual grouting material on the upper opening of the insulation board is cleaned in time, so that the insulation board is ensured to be continuous up and down, and the phenomenon of cold and hot bridges generated during secondary stacking is prevented from influencing the insulation effect;
step 9 repeats steps 5 through 8 until completed.
2. The construction method of the assembled prefabricated wall according to claim 1, wherein: when the die clamping building blocks are placed, the upper and lower skins are correspondingly lapped with the holes or the staggered joints; when holes cannot be aligned, the overlap length of the staggered holes is not less than 90 mm; when the requirements cannot be met, the horizontal seam is arranged
And the distance between the two ends of the tie bar and the vertical seam is not less than 400mm, and the vertical through seam does not exceed the two-skin mold clamping building block.
3. The construction method of the assembled prefabricated wall according to claim 1, wherein: during construction in a rainy period, the construction of the heat-preservation mold-clamped building block masonry should be stopped, and a rainproof measure should be adopted in the construction of the common mold-clamped building block masonry to prevent rainwater from entering a wall body; when the construction is continued after rain, the verticality of the wall body needs to be checked; the consistency of the grouting slurry should be reduced appropriately according to the actual situation.
4. The construction method of the assembled prefabricated wall according to claim 2, wherein: when the average outdoor daily temperature is continuously below 5 ℃ for 5 days or the temperature suddenly drops, winter is adopted in time; and (4) construction measures, namely removing the measures of winter construction when the average outdoor daily temperature is continuously higher than 5 ℃ for 5 days.
5. The construction method of the assembled prefabricated wall according to claim 1, wherein: the mold clamping building block comprises: the building block comprises a common mold clamping building block, a heat preservation mold clamping building block, a reinforced common mold clamping building block and a reinforced heat preservation mold clamping building block.
6. The construction method of the assembled prefabricated wall according to claim 5, wherein: the compression strength grade of the common mould clamping building block and the heat preservation mould clamping building block is as follows: MU5.0, MU7.5 and MU 10.0; the compressive strength grade of the common reinforced mould clamping block and the reinforced heat-preservation mould clamping block is as follows: MU10.0, MU15.0 and MU 20.0.
7. The construction method of the assembled prefabricated wall according to claim 5, wherein: the strength grades of the grouting slurry should adopt Mb10, Mb7.5 and Mb 5.
8. The construction method of the assembled prefabricated wall according to claim 5, wherein: the strength grade of the pouring hole concrete is not less than Cb 20; the slump of the concrete for pouring the hole is more than 200mm, and the maximum particle of the aggregate is not more than 16 mm; and concrete members such as constructional columns, ring beams and horizontal tie beams in the mould clamping building block masonry are not less than C20 in concrete strength grade.
9. The construction method of the assembled prefabricated wall according to claim 1, wherein: when the mold clamping building block hole is grouted, a temporary supporting measure can be arranged at the opening of the door and window to prevent the mold clamping building block from shifting.
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