CN115772995A - Bare concrete construction method for cylindrical template of PE double-wall corrugated pipe - Google Patents
Bare concrete construction method for cylindrical template of PE double-wall corrugated pipe Download PDFInfo
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Abstract
The invention discloses a bare concrete construction method for a cylindrical template of a PE double-wall corrugated pipe, and belongs to the technical field of bare concrete construction methods. The technical scheme is as follows: cleaning the cylindrical template and coating a release agent on the inner side; cleaning the root of the cylindrical template and positioning; closing the cylindrical template, and installing a clamp to reinforce the cylindrical template; adjusting and checking the verticality of the cylindrical template; and (5) pouring concrete. The invention adopts the PE double-wall corrugated pipe cylindrical template, the finish degree of the constructed concrete cylinder is high, and the template does not need a complex external support system, and has light dead weight, high work efficiency, less joints and low cost.
Description
Technical Field
The invention relates to the technical field of fair-faced concrete construction methods, in particular to a PE double-wall corrugated pipe cylindrical template fair-faced concrete construction method.
Background
The traditional cylindrical shaping steel template system, wood template and glass fiber reinforced plastic cylinder template system have the following defects: the method has the advantages of multiple splicing seams, time consumption, low turnover frequency, high cost, large one-time person throwing, large self weight, inconvenient manual movement, need of vertical transportation machinery for auxiliary transportation and the like. The invention adopts the PE double-wall corrugated pipe cylindrical template, the finish degree of the constructed concrete cylinder is high, and the template does not need a complex external support system, and has light dead weight, high work efficiency, few seams and low cost.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the PE double-wall corrugated pipe cylindrical formwork is adopted, the finish degree of the constructed concrete cylinder is high, the formwork does not need a complex external supporting system, the dead weight is light, the work efficiency is high, the number of joints is small, and the cost is low.
The technical scheme of the invention is as follows:
the PE double-wall corrugated pipe cylindrical template fair-faced concrete construction method comprises the steps of cleaning a cylindrical template and coating a release agent on the inner side of the cylindrical template; cleaning the root of the cylindrical template and positioning; closing the cylindrical template, and installing a clamp to reinforce the cylindrical template; adjusting and checking the verticality of the cylindrical template; and (5) pouring concrete.
Preferably, according to the diameter of a cylinder on a design drawing, the corrugated pipe material is processed into a finished pipe with the diameter consistent with that of the cylinder, and the finished pipe is conveyed to a site and then cut into two semicircles according to a design elevation drawing line; after the cylindrical reinforcing steel bars are bound, positioning and installing according to the positions of the cylinders, and coating a release agent on the inner side of the cylindrical template of the corrugated pipe during installation so as to facilitate later-stage template removal; splicing the two cut semicircles, arranging an iron wire around the concave part of the corrugated pipe, reinforcing the secondary edges by using vertical wood purlins, and hooping the vertical wood purlins by using a reinforcing steel bar hoop on the outermost ring; the perpendicularity of the corrugated pipe cylindrical template is adjusted through a flange at the top of the cylindrical template and a steel wire cable fixed on the flange, so that the perpendicularity of the cylindrical template is ensured; and then pouring concrete into the cylindrical template, and dismantling the cylindrical template and curing the concrete after the strength of the cylindrical concrete reaches the specification.
Preferably, during construction, the joint treatment between two cracks at the joint of the two semicircular corrugated pipes needs to be paid attention to, so that visible cracks or joint leakage can be prevented.
Preferably, the method specifically comprises the following steps:
s1: the column ribs are concealed and checked, the column roots are cleaned, and the ground is leveled by mortar;
s2: before the cylindrical template is assembled, a layer of release agent is uniformly coated, and no coating leakage is caused;
s3 positioning and supporting of cylindrical template
S31, positioning the cylindrical template: a cross top die or a positioning rib is arranged at the lower opening of the column rib according to a line, when the position of the cylindrical template is adjusted, a wood block is padded between the lower column hoops of the cross top template or between the positioning rib and the lower column hoops, and the position of the template is ensured after adjustment;
s32, supporting a cylindrical template: cutting the corrugated pipe into two halves along the seam mark of the material by a cutting machine; when the template is installed, after the two semicircles are assembled, iron wires are arranged at intervals around the concave part of the corrugated pipe, the secondary ridges are arranged at intervals by adopting vertical wood purlins, and then the vertical wood purlins are hooped by adopting a reinforcing steel bar hoop;
s4, adjusting the verticality of the template: a flange is pre-installed on a column hoop in the installation process of the template, steel wire cables are connected with the flange on the upper column hoop through hooks, and four steel wire cables are arranged in four mutually vertical directions of the cylinder; if the perpendicularity of the template does not meet the requirement, the length of the steel wire cable is adjusted to adjust the perpendicularity, and the requirement of the template perpendicularity is met;
s5, sealing the bottom of the template: the bottom of the template is sealed by mortar;
s6 concrete pouring and verticality correction
S61 concrete pouring: before concrete pouring, an independent operation frame is firstly erected, the free height of concrete when entering a mold is smaller than 2m, and if the free height of concrete exceeds 2m, a string cylinder is adopted to prevent the concrete from segregation; the concrete is densely poured in layers, the pouring height of each layer is 400-500 mm, and a concrete vibrating rod cannot touch main ribs of the contact column and a template during vibrating;
s62, correcting verticality: during the pouring process of concrete and before initial setting after pouring, rechecking and correcting the verticality of the column at any time, and high vertical precision can be obtained by finely adjusting the flange bolt;
s7, removing the mold: and (4) after the strength of the column concrete reaches the standard, removing the template, and curing the concrete according to the standard.
Preferably, in step S32, iron wires are arranged around the corrugated pipe recess at intervals of 400mm, and the secondary ridges are arranged at intervals of 200mm in vertical 100 × 50mm wood beams.
Preferably, in step S32, the blanking of the corrugated pipe at the joint between the column and the beam is accurately calculated, the corrugated pipe is cut into an oblique cross section, the corrugated pipe is tightly jointed with the beam template, and the beam end is vertically fixed by a wood beam.
Preferably, in step S4, the wire rope is at an angle of 45 ° to 60 ° to the ground.
Preferably, in step S7, when detaching the formwork, the column base mortar is chiseled off, then the steel wire cable is detached, after the corrugated pipe column hoop is loosened, the formwork automatically pops open from the interface, and the formwork is manually removed.
Preferably, step S7 further comprises: the method comprises the following steps of cleaning template garbage and coating a separant, wherein the inner wall cannot be damaged when the template is cleaned; the partially damaged template can be repaired and then reused, and the template with larger damaged area can be shortened to be used for lengthening other templates; the interface of the cylindrical template is easy to be damaged by collision, and needs to be protected against collision.
Compared with the prior art, the invention has the following beneficial effects:
1. the construction of the plastic corrugated pipe material cylindrical template is characterized in that: the PE double-wall corrugated pipe cylindrical template is a double-wall high-strength composite material cylindrical template formed by processing materials such as high-density polyethylene (HDPE), filling master batch and the like through a branch forming plastic product process, and has the characteristics of reasonable structure, attractive appearance, good temperature resistance, small friction resistance, low manufacturing cost, acid and alkali resistance, corrosion resistance, good sealing performance, high strength, good impact resistance, treading resistance, light weight, convenience in installation and transportation and the like. The PE double-wall corrugated pipe cylindrical template solves the problem that the assembly of a shaped steel template, a wooden template and a glass fiber reinforced plastic simple template is difficult to solve. The advantages are as follows: 1) The template support is simple: the PE double-wall corrugated pipe cylindrical template is integrally circular, so that the PE double-wall corrugated pipe cylindrical template can be used only by cutting during construction, and the closing condition of the interface is quite good as long as the PE double-wall corrugated pipe cylindrical template is slightly filled during construction. 2) The formed concrete has high smoothness: because the plastic corrugated pipe is of a plastic structure and the inner wall of the template is smooth, the material surface and the concrete are not easy to bond and have no seam in the horizontal direction as long as the release agent is coated on the inner wall of the template according to requirements; and because the corrugated pipe has small resistance, the coating agent is coated, and the like, the phenomena of honeycomb pitted surface and the like can not occur in the concrete pouring process, so the poured concrete has smooth and flat surface and consistent color, completely meets the requirements of clear water columns, has no transverse seam, accurate roundness and small verticality error. 3) The PE double-wall corrugated pipe cylindrical template has the advantages of light self weight, good toughness, impact resistance, high strength, acid and alkali resistance, good corrosion resistance and the like, can be repeatedly used in a coastal environment, and can save the construction cost to a great extent. 4) The corrugated pipe is easy to form, convenient to assemble and disassemble and high in working efficiency, and can be poured after being reinforced and positioned in the using process; the PE double-wall corrugated pipe cylindrical template is very light, convenient to move, capable of being erected by a single person, simple to operate, capable of being installed by 1-2 persons, capable of reducing labor intensity of operators, free of tower crane dismounting and saving mechanical investment. 5) Because the plastic corrugated pipe has the characteristics of high strength, good impact resistance, no fear of treading, light weight, convenient transportation and the like, the cylindrical formwork is convenient to clean and maintain after being dismantled.
2. The PE double-wall corrugated pipe cylindrical formwork construction method is suitable for cylindrical formwork construction with the diameter of 300-1000mm, and is not affected by use functions, construction seasons and environment. And each template reduces the cost along with the increase of the turnover frequency, is very economic, has light weight and high strength, can improve the efficiency, shorten the construction period and accelerate the turnover of the templates, and is particularly suitable for projects with high quality requirements, large workload, tight construction period and insufficient vertical transportation equipment.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of positioning the cylindrical template in step S31 of the present invention.
Fig. 2 is one of the schematic diagrams of supporting the cylindrical template in step S32 of the present invention.
Fig. 3 is a second schematic diagram illustrating perpendicularity adjustment of the cylindrical template in step S33 according to the present invention.
In the figure, 1, bellows; 2. positioning ribs; 3. wood purlin; 4. a steel bar hoop; 5. a flange; 6. a cable; 7. and (4) mortar.
Detailed Description
In order to make those skilled in the art better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, shall fall within the protection scope of the present invention.
1. The method for constructing the bare concrete of the PE double-wall corrugated pipe cylindrical template comprises the following steps:
s1: the column ribs are concealed and checked, the column roots are cleaned, and the ground is leveled by mortar;
s2: before the cylindrical template is assembled, a layer of release agent is uniformly coated, and no coating leakage is caused;
s3 positioning and supporting of cylindrical template
S31, positioning a cylindrical template: a cross top die or a positioning rib 2 (shown in figure 1) is arranged at the lower opening of the column rib according to a line, when the position of the cylindrical template is adjusted, a wood block is padded between the lower column hoops of the cross top die or between the positioning rib 2 and the lower column hoops, and the position of the template is ensured after adjustment;
s32, supporting a cylindrical template: as shown in fig. 2-3, the corrugated pipe 1 is cut into two halves by a cutting machine along the seam mark of the material, and the two halves are numbered respectively, so that the two halves of the template are always matched for use in circulation; when the template is installed, after two semicircles are assembled, iron wires are arranged at intervals of 400mm around the concave part of the corrugated pipe 1, secondary ridges are arranged at intervals of 200mm by adopting vertical 100 multiplied by 50mm wood purlins 3, and then the vertical wood purlins 3 are hooped by adopting three-level reinforcing steel bar hoops 4; the blanking of the corrugated pipe 1 at the joint of the column and the beam needs to be accurately calculated, the corrugated pipe is cut into an oblique section, the corrugated pipe is tightly jointed with a beam template, and the beam end is vertically fixed by a wood balk 3; the distance between the steel bar hoops is 400mm;
s4, adjusting the verticality of the template: as shown in fig. 3, a flange 5 is pre-installed on a column hoop in the process of installing a template, a steel wire cable 6 is connected with the flange 5 on the upper column hoop through a hook, four steel wire cables 6 are arranged in four mutually vertical directions of a column, and the steel wire cable 6 forms an angle of 45-60 degrees with the ground; if the template verticality does not meet the requirement, adjusting the length of the steel wire cable 6 to adjust the verticality to meet the requirement of the template verticality;
s5, sealing the bottom of the template: as shown in fig. 3, the bottom of the formwork is sealed by mortar 7, and the height of the mortar 7 is 50mm;
s6 concrete pouring and verticality correction
S61 concrete pouring: before concrete pouring, an independent operation frame is firstly erected, the free height of concrete when entering a mold is smaller than 2m, and if the free height of concrete exceeds 2m, a string cylinder is adopted to prevent the concrete from segregation; the concrete is poured and tamped in layers, the pouring height of each layer is 400-500 mm, and a concrete vibrating rod cannot touch a main rib of a column and a template during vibration;
s62, correcting verticality: during the pouring process of concrete and before initial setting after pouring, rechecking and correcting the verticality of the column at any time, and high vertical precision can be obtained by finely adjusting the flange bolt;
s7, removing the mold: after the strength of the column concrete reaches the standard, the template can be dismantled, and the concrete is cured according to the standard; when the template is detached, the column base mortar 7 is chiseled off, then the steel wire cable 6 is detached, after the column hoop of the corrugated pipe is loosened, the template automatically pops open from the interface, and the template is manually removed; the method comprises the following steps of cleaning template garbage and coating a separant, wherein the inner wall cannot be damaged when the template is cleaned; the template with the local damage can be repaired and reused, and the template with the larger damage area can be shortened for lengthening other templates; the interface of the cylindrical template is easy to be damaged by collision, and needs to be protected against collision.
S8 preservation and repair of template
And S81, storing the template: the template is required to be unfolded and horizontally placed on the ground when being stored, the working surface faces downwards, and if the template is unconditionally horizontally placed on an operation site, the template is required to be assembled and then vertically placed; before each use, the template is checked to be damaged, the slurry on the working surface is removed (the working surface of the template is not damaged during removal), and a release agent is uniformly sprayed for use; the template is prevented from being turned over, detached, stepped or impacted by heavy objects and exposed to high temperature;
s82, repairing the template: when the template has the phenomena of hole damage or small-area cracking and the like, the composite material is applied to repair in time, and the use of the template with damage is strictly forbidden.
2. Materials and apparatus
2.1 Main Material
2.1.1 The PE double-wall corrugated pipe cylindrical template is a double-wall high-strength composite material cylindrical template formed by processing high-density polyethylene (HDPE), filling master batch and the like through a special process, the self weight is 5-7kg/m, and the ultimate tensile stress is 800N/mm 2 . The technical indexes are shown in Table 1.
TABLE 1
2.1.2 coating a layer of high-performance and high-strength resin on the inner surface of the column mould.
The inner wall thickness of the 2.1.3 column die is 2.5-3.0mn, the outer wall thickness is 5-55mm, the thickness of the die plate is consistent, the surface is uniform and smooth, no seam height difference, no bubble and no slag inclusion exist.
2.2 Main construction machines
Mainly comprises the following steps: pistol drill, wrench, 5m steel tape, line weight, ink fountain, level ruler, welding machine, etc. Each cylinder adopts 4 steel wire ropes of 0.8mm as mooring ropes, and each mooring rope adopts a steel wire rope clamping head and a flange bolt in a pair. A pair of cylindrical flanges are adopted for each specification of cylinder.
3. Quality control
And executing relevant regulations of concrete structure engineering construction quality acceptance regulations GB50204 on templates and concrete, wherein the allowable deviation items are improved compared with the requirements of the regulations.
3.1 the machined inner side of the column die is flat and smooth, and the allowable deviation of the template installation is executed according to the table 2.
TABLE 2
3.2 the concrete column poured by the method has no serious defects and is not suitable for having common defects. The allowable deviation is performed as in table 3.
TABLE 3
4 safety measures
4.1 all mechanical equipment needs to be provided with leakage protection.
4.2 all the electromechanical devices need to be tested according to the regulations and put into use after being normal.
4.3 enough illumination should be provided on site, and power and illumination wires need to be buried or special electric poles need to be arranged in an overhead manner.
4.4 the support under the floor slab being cast and tamped is not removed.
4.5 when the template is dismantled, the construction safety must be paid attention to, enough illumination should be set in the dismantling layer, and one part is immediately turned over according to the dismantling part, so that the cleanness of the working face is ensured, and the continuous template dismantling is avoided.
4.6 the edge operation needs enough operating platform and safety protection.
4.7 the safe operation rules should be followed in the process of formwork supporting, and the formwork should not be suspended.
4.8 constructors must wear safety helmets and tie up in the correct wearing manner.
4.9 the construction operator entering the site forbids smoking, drunk operation, wearing slippers, pursuing and alarming, shifting posts and operating mechanical equipment irrelevant to the operator, and strictly abides by various safety operating regulations and labor disciplines.
4.10 prevention of high temperature heatstroke
4.10.1 the work and rest time is reasonably adjusted, and the workers have enough rest and sleep time.
4.10.2 tea, cool and refreshing salt-containing beverage, mung bean soup and the like which meet the sanitary requirements are continuously supplied on site.
4.10.3 can be used for dispensing emergency medicine for preventing heatstroke and cooling to workers in advance.
5 environmental protection measures
5.1 the solid waste (waste template and chiseled concrete) generated by construction is collected in a classified way and treated uniformly, so that the pollution to the environment is reduced.
5.2 the building wastewater is precipitated, recycled and discharged into a sewage pipeline.
5.3 the materials used for the concrete mixture, in particular the additive materials, meet the requirement of environmental protection.
5.4 in the concrete construction process, protective measures such as noise reduction and noise reduction are adopted; the construction time should be staggered with the rest time of nearby residents as much as possible.
6 benefit analysis
6.1 economic benefits
6.1.1 the process is simple and convenient: compared with a wood template, only one PE double-wall corrugated pipe cylindrical template is needed for one column, only two vertical seams are formed in the whole column from top to bottom, no horizontal seam exists, compared with a glass template steel plate with a tire and a steel template, the connector is not required to be manually pulled away during supporting, the weight is light, 1-2 people can be hauled, a tower crane is not needed for dismounting, the mechanical investment is saved, and the supporting speed is obviously accelerated. The economic benefit analysis is shown in table 4.
TABLE 4
6.1.2 work efficiency increase and construction period saving: because the construction process is simple and convenient, the material weight is light, and the mechanical hoisting is not needed during the installation, the construction efficiency of the template can be improved by 3-4 times through project measurement, the installation speed of the template is accelerated, and the construction period is greatly saved.
6.1.3 the concrete has excellent appearance: the cylindrical appearance formed by the cylindrical template of the PE double-wall corrugated pipe completely meets the requirements of fair-faced concrete, and the common quality problem which cannot be overcome by fine finishing is solved.
6.1.4 cost savings: the manufacturing cost of the PE double-wall corrugated pipe cylindrical template product is low, the direct material cost of each meter of the PE double-wall corrugated pipe cylindrical template product is reduced by 2/3 compared with that of a steel large template, the manufacturing cost is reduced by 1/2 compared with that of a wood template, and the construction process is applied in construction, so that the construction cost is greatly saved.
6.2 social and environmental benefits
The construction method is adopted to carry out cylindrical concrete pouring construction, so that the construction speed can be accelerated, the construction period can be shortened, and the engineering cost can be reduced. In addition, the construction method greatly improves the utilization rate of turnover materials and greatly reduces the consumption of the turnover materials such as steel pipe scaffolds and the like. After the cylindrical template of the PE double-wall corrugated pipe is used, the cylindrical template can be recycled and returned to a factory, so that the garbage pollution is greatly reduced; the practical engineering application proves that the construction method has better technical and economic effects and higher popularization and application values.
Example 1 Anaena Innovation town (fourth phase) two-stage project
Item overview: the Atalana creates a second-stage project of a small town (fourth stage), and the total building area of the east side of a coastal highway and the north side of a pumping station in the New region of the North Dynasty is 2938 square meters; and (3) construction period: 3/10/2019-8/18/2020. Comprises a 26# cultural relic center, the building height is 15.5 meters, and 3 floors on the ground.
Construction conditions are as follows: the first layer of engineering is designed to be commercial and comprises 15 600 cylinders and 22 800 cylinders, double-wall corrugated pipes with corresponding specification and size are purchased on site according to the circular size requirement of a construction drawing, after the cylindrical steel bars are bound, the double-wall corrugated pipes are cut into 2 halves along the seam marks of the materials, and the double-wall corrugated pipes are numbered respectively; and assembling and fixing and reinforcing the template, and dismantling the double-wall corrugated pipe after the cylindrical concrete is poured and recycling.
The implementation effect is as follows: the first layer design on site proves that the PE double-wall corrugated pipe cylindrical template has light weight and high strength through construction application practices, achieves the best comprehensive effects of low manufacturing cost, good appearance of cylindrical concrete, high forming precision, simple and convenient construction and shortened construction period, and is an important progress of the cylindrical template technology.
Example 2
Item overview: a project of the second-level section of the town (second-level) created by Anayawinia is positioned at the northeast side of the intersection of a new coastal great road in the north-wearing river of Qinhuang island city and a golden coast road, and comprises 5 single buildings with 4-6 floors and 1 non-human and non-underground garage. And (3) construction period: 26 days 7/2018-30 days 5/2020. The total building area is 52648 square meters, with the total above-ground building area 30272.29 square meters and the total underground building area 21000 square meters.
Construction conditions are as follows: designing 12 cylinders with the thickness of 600mm and 8 cylinders with the thickness of 800mm in the underground garage of the project, purchasing double-wall corrugated pipes with corresponding specifications and sizes on site, cutting the double-wall corrugated pipes into 2 halves along the seam marks of materials after binding of cylindrical reinforcing steel bars is completed, and numbering the double-wall corrugated pipes respectively; and assembling and fixing and reinforcing the template, and dismantling the double-wall corrugated pipe after the cylindrical concrete is poured and recycling.
The implementation effect is as follows: the construction application practice proves that the PE double-wall corrugated pipe cylindrical template has the characteristics of simple construction, high concrete forming quality, low cost and the like, greatly shortens the construction period, and has great implementation value
Although the present invention has been described in detail by referring to the drawings in connection with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions should be within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present disclosure and the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
- The bare concrete construction method of the cylindrical template of the PE double-wall corrugated pipe is characterized in that the cylindrical template is cleaned and coated with a release agent on the inner side; cleaning the root of the cylindrical template and positioning; closing the cylindrical template, and installing a clamp to reinforce the cylindrical template; adjusting and checking the verticality of the cylindrical template; and (5) pouring concrete.
- 2. The fair-faced concrete construction method for the cylindrical template of the PE double-wall corrugated pipe according to claim 1, wherein the material of the corrugated pipe (1) is processed into a finished pipe with the diameter consistent with that of a cylinder according to the diameter of the cylinder on a design drawing, and the finished pipe is cut into two semicircles by drawing lines according to a designed elevation after being transported to a site; after the cylindrical reinforcing steel bars are bound, positioning and installing according to the positions of the cylinders, and coating a release agent on the inner side of the cylindrical template of the corrugated pipe during installation so as to facilitate later-stage template removal; splicing the two cut semi-circles, arranging iron wires around the concave part of the corrugated pipe (1), reinforcing the secondary edges by using vertical wood beams (3), and then hooping the vertical wood beams (3) by using a steel bar hoop (4) at the outermost circle; the perpendicularity of the corrugated pipe cylindrical template is adjusted through a flange at the top of the cylindrical template and a steel wire cable (6) fixed on the flange, so that the perpendicularity of the cylindrical template is ensured; and then pouring concrete into the cylindrical template, and dismantling the cylindrical template and curing the concrete after the strength of the cylindrical concrete reaches the specification.
- 3. The bare concrete construction method of the PE double-wall corrugated pipe cylindrical formwork according to claim 2, wherein during construction, the joint treatment between two cracks at the joint of the two semicircular corrugated pipes (1) needs to be paid attention to, so as to prevent visible cracks or joint leakage.
- 4. The bare concrete construction method of the PE double-wall corrugated pipe cylindrical formwork as claimed in claim 2, is characterized by comprising the following steps:s1: the column ribs are concealed and checked, the column roots are cleaned, and the ground is leveled by mortar;s2: before the cylindrical template is assembled, a layer of release agent is uniformly coated, and no coating leakage is caused;s3 positioning and supporting of cylindrical templateS31, positioning a cylindrical template: a cross top die or a positioning rib (2) is arranged at the lower opening of the column rib according to a line, when the position of the cylindrical template is adjusted, a wood block is padded between the lower column hoops of the cross top template or between the positioning rib (2) and the lower column hoops, and the position of the template is ensured after adjustment;s32, supporting a cylindrical template: cutting the corrugated pipe (1) into two halves along the seam mark of the material by a cutting machine; when the template is installed, after the two semicircles are assembled, iron wires are arranged at intervals around the concave part of the corrugated pipe (1), the secondary edges are arranged at intervals by adopting vertical wood purlins (3), and then the vertical wood purlins (3) are hooped by adopting a reinforcing steel bar hoop (4);s4, adjusting the verticality of the template: the method comprises the following steps that a flange (5) is pre-installed on a column hoop in the installation process of a template, steel wire cables (6) are connected with the flange (5) on the upper column hoop through hooks, and the four steel wire cables (6) are arranged in four mutually perpendicular directions of a cylindrical template; if the perpendicularity of the template does not meet the requirement, the length of the steel wire cable (6) is adjusted to adjust the perpendicularity, and the requirement of the template perpendicularity is met;s5, sealing the bottom of the template: the bottom of the template is sealed by mortar (7);s6 concrete pouring and verticality correctionS61 concrete pouring: before concrete pouring, an independent operation frame is firstly erected, the free height of concrete when entering a mold is smaller than 2m, and if the free height of concrete exceeds 2m, a string cylinder is adopted to prevent the concrete from segregation; the concrete is poured and tamped in layers, the pouring height of each layer is 400-500 mm, and a concrete vibrating rod cannot touch a main rib of a column and a template during vibration;s62, correcting verticality: during the pouring process of concrete and before initial setting after pouring, rechecking and correcting the verticality of the column at any time, and obtaining higher vertical precision by finely adjusting the flange bolt;s7, removing the mold: and (4) after the strength of the column concrete reaches the standard, removing the template, and curing the concrete according to the standard.
- 5. The bare concrete construction method for the PE double-wall corrugated pipe cylindrical template as recited in claim 4, wherein in step S32, iron wires are arranged around the concave part of the corrugated pipe (1) at intervals of 400mm, and secondary ridges are arranged at intervals of 200mm by adopting vertical 100 x 50mm wood beams (3).
- 6. The bare concrete construction method for the PE double-wall corrugated pipe cylindrical template as claimed in claim 4, wherein in step S32, the blanking of the corrugated pipe (1) at the joint of the cylinder and the beam is accurately calculated, the corrugated pipe is cut into an oblique section, the joint with the beam template is tight, and the beam end is vertically fixed by a wood beam (3).
- 7. The bare concrete construction method of the PE double-wall corrugated pipe cylindrical formwork according to claim 4, wherein in the step S4, the steel wire cable (6) forms an angle of 45-60 degrees with the ground.
- 8. The bare concrete construction method of the PE double-wall corrugated pipe cylindrical formwork according to claim 4, wherein in the step S7, when the formwork is disassembled, the column base mortar (7) is chiseled off, the steel wire cable (6) is disassembled, after the corrugated pipe column hoop is loosened, the formwork automatically bounces off from the interface, and the formwork is manually removed.
- 9. The bare concrete construction method of the PE double-wall corrugated pipe cylindrical formwork of claim 4, wherein the step S7 further comprises: the template garbage is cleaned and coated with a separant, so that the inner wall cannot be damaged when the template is cleaned; the template with the local damage can be repaired and reused, and the template with the larger damage area can be shortened for lengthening other templates; the interface of the cylindrical template is easy to be damaged by collision, and needs to be protected against collision.
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| CN202211481476.2A CN115772995A (en) | 2022-11-24 | 2022-11-24 | Bare concrete construction method for cylindrical template of PE double-wall corrugated pipe |
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| CN202211481476.2A Pending CN115772995A (en) | 2022-11-24 | 2022-11-24 | Bare concrete construction method for cylindrical template of PE double-wall corrugated pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116289898A (en) * | 2023-05-05 | 2023-06-23 | 中国电建集团重庆工程有限公司 | Photovoltaic cast-in-situ pile foundation construction technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116289898A (en) * | 2023-05-05 | 2023-06-23 | 中国电建集团重庆工程有限公司 | Photovoltaic cast-in-situ pile foundation construction technology |
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