CN116971642A - Prestress hollow plate reinforcing method - Google Patents
Prestress hollow plate reinforcing method Download PDFInfo
- Publication number
- CN116971642A CN116971642A CN202310979445.8A CN202310979445A CN116971642A CN 116971642 A CN116971642 A CN 116971642A CN 202310979445 A CN202310979445 A CN 202310979445A CN 116971642 A CN116971642 A CN 116971642A
- Authority
- CN
- China
- Prior art keywords
- steel
- middle block
- steel plate
- angle
- angle steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 115
- 239000010959 steel Substances 0.000 claims abstract description 115
- 239000010410 layer Substances 0.000 claims abstract description 10
- 238000005034 decoration Methods 0.000 claims abstract description 7
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 6
- 239000002344 surface layer Substances 0.000 claims abstract description 5
- 238000005056 compaction Methods 0.000 claims abstract description 4
- 238000012545 processing Methods 0.000 claims abstract description 4
- 239000003292 glue Substances 0.000 claims abstract description 3
- 239000000126 substance Substances 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 abstract description 2
- 239000004917 carbon fiber Substances 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract description 2
- 239000004744 fabric Substances 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
- E04G23/0237—Increasing or restoring the load-bearing capacity of building construction elements of storey floors
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention provides a prestress hollow plate reinforcing method, which solves the problems that the traditional reinforcing method such as increasing the section, pasting carbon fiber cloth, pasting flat steel and the like needs to damage the existing decoration in a large range and is inconvenient in practical construction and installation, and mainly comprises the steps of S1, locally chiseling off the decoration surface layer of the existing building and processing the decoration surface layer to the base layer of the existing building structure; s2, angle steel is additionally arranged at the periphery of the corresponding prestressed hollow slab, the 45-degree angle cutting is carried out on the end parts of the adjacent angle steel, the adjacent angle steel and the original concrete beam are spliced into a whole, the angle steel is fixedly connected with the original concrete beam through a plurality of anchor bolts, and the hole of the anchor bolts is filled with glue for compaction; s3, adding steel plate brackets on the inner sides of the splicing parts of the end parts of the two adjacent angle steels, arranging a steel plate middle block in the center of a room, and connecting the middle block and the four steel plate brackets into a whole through flat steel, so that the flat steel, the middle block and the four steel plate brackets are ensured to be in the same plane; s4, filling gaps among the prestressed hollow plates, the angle steel, the flat steel, the steel plate support and the middle block with mortar.
Description
Technical Field
The invention relates to the technical field of prestressed hollow plates, in particular to a method for reinforcing a prestressed hollow plate.
Background
The prestressed hollow slab is used as a building cover and is widely applied to the existing buildings in 1980 to 2000, the existing buildings are in service period, the earthquake resistance performance is poor in the past earthquake, and collapse and falling occur even when serious, so that casualties are caused.
Conventionally, reinforcing methods such as floor slab section enlarging, carbon fiber cloth pasting, flat steel pasting and the like are adopted for the prestressed hollow slab, but the conventional reinforcing method needs to damage the existing decoration in a large range, and is inconvenient in practical construction and installation.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a prestress hollow plate reinforcing method which can reduce damage to the existing building and is more convenient to install.
In order to solve the technical problems, the invention adopts the following technical scheme: a prestress hollow plate reinforcing method comprises the following steps:
s1, locally chiseling off a decoration surface layer of an existing building, and processing to an existing building structure base layer;
s2, angle steel is additionally arranged at the periphery of the corresponding prestressed hollow slab, the 45-degree angle cutting is carried out on the end parts of the adjacent angle steel, the adjacent angle steel and the original concrete beam are spliced into a whole, the angle steel is fixedly connected with the original concrete beam through a plurality of anchor bolts, and the hole of the anchor bolts is filled with glue for compaction;
s3, angle steel is arranged around the room, steel plate supports are additionally arranged on the inner sides of the splicing parts of the end parts of two adjacent angle steel, the flush top surfaces of the adjacent steel plate supports are guaranteed to reliably transfer force and also serve as flat steel connecting points, a steel plate middle block is arranged in the center of the room, the middle block and the four steel plate supports are connected into a whole through flat steel, and the flat steel, the middle block and the four steel plate supports are guaranteed to be in the same plane;
and S4, placing the hollow plates of floors below the bottom layer corresponding to each layer of angle steel, performing mortar filling at the contact position of the angle steel and the hollow plates, erecting the hollow plates of floors below the top layer corresponding to the hollow plates on the top surface of the concrete beam, and performing mortar filling at the contact position of the diagonal steel and the hollow plates.
Further, the specification of the angle steel is L75X 5mm, the bolt is an M12 chemical bolt, and the hole distance from the bottom surface of the hollow plate is 40mm.
Further, the steel plate support is 175×175×5mm in size, the middle block is 300×250×5mm in size, the flat steel is 50mm wide and 4mm thick, one end of the flat steel is integrally welded with one end of the steel plate support far away from the angle steel splicing end, and the other end of the flat steel is integrally welded with the middle block.
Compared with the prior art, the invention has the beneficial effects that: the contact surface of the prestressed hollow slab and the wall body or the beam can be improved by additionally arranging the angle steel and the steel plate support, and the falling risk is reduced when the prestressed hollow slab and the wall body relatively slide under the earthquake force. Meanwhile, the steel plate support can be used as a connection point of the flat steel, and a plane truss stress system is formed by the steel plate support and the flat steel, so that structural assumption of infinite rigidity of floors is met, and earthquake force is transmitted to the side force resisting component according to design requirements.
Drawings
The disclosure of the present invention is described with reference to the accompanying drawings. It is to be understood that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the invention. In the drawings, like reference numerals are used to refer to like parts. Wherein:
FIG. 1 schematically shows a left end mounting structure of a hollow slab according to an embodiment of the present invention;
FIG. 2 schematically shows a right end mounting structure of a hollow slab according to an embodiment of the present invention;
FIG. 3 schematically illustrates a steel plate bracket and flat steel mounting structure according to one embodiment of the present invention;
fig. 4 schematically shows a plan view of a hollow slab mounting structure according to an embodiment of the present invention.
Reference numerals in the drawings: 1. a concrete beam; 2. angle steel; 3. an anchor bolt; 4. a hollow slab; 5. a steel plate support; 6. flat steel; 7. and an intermediate block.
Detailed Description
It is to be understood that, according to the technical solution of the present invention, those skilled in the art may propose various alternative structural modes and implementation modes without changing the true spirit of the present invention. Accordingly, the following detailed description and drawings are merely illustrative of the invention and are not intended to be exhaustive or to limit the invention to the precise form disclosed.
An embodiment according to the present invention is shown in connection with fig. 1-4.
A prestress hollow plate reinforcing method comprises the following steps:
s1, locally chiseling off a decoration surface layer of an existing building, and processing to an existing building structure base layer;
s2, arranging angle steel at the periphery of the corresponding prestressed hollow slab, cutting angles of 45 degrees on the end parts of the adjacent angle steel, splicing the angle steel into a whole, connecting and fixing the angle steel with the original concrete beam through a plurality of anchor bolts, grouting holes of the anchor bolts for compaction,
s3, angle steel is arranged around the room, steel plate supports are additionally arranged on the inner sides of the splicing parts of the end parts of two adjacent angle steel, the flush top surfaces of the adjacent steel plate supports are guaranteed to reliably transfer force and also serve as flat steel connecting points, a steel plate middle block is arranged in the center of the room, the middle block and the four steel plate supports are connected into a whole through flat steel, and the flat steel, the middle block and the four steel plate supports are guaranteed to be in the same plane;
and S4, placing the hollow plates of floors below the bottom layer corresponding to each layer of angle steel, performing mortar filling at the contact position of the angle steel and the hollow plates, erecting the hollow plates of floors below the top layer corresponding to the hollow plates on the top surface of the concrete beam, and performing mortar filling at the contact position of the diagonal steel and the hollow plates.
In some specific embodiments, the angle gauge is L75 x 5mm, the bolt is an M12 chemical bolt, and the hole distance from the bottom surface of the hollow slab is 40mm. The steel plate support is 175×175×5mm in size, the middle block is 300×250×5mm in size, the flat steel is 50mm wide and 4mm thick, one end of the flat steel is welded with one end of the steel plate support far away from the angle steel splicing end into a whole, and the other end of the flat steel is welded with the middle block into a whole.
This scheme adds the angle steel around to the floor, and the angle steel passes through the crab-bolt to be connected with the girt or the structure roof beam of existing building, splices as an organic wholely through 45 chamfer's mode between the adjacent angle steel, strengthens end connection rigidity through the steel sheet support that inboard welding thickness is unanimous with the angle steel simultaneously, and four steel sheet supports still connect as an organic wholely through the band steel of crossing, and connection center is a planar intermediate piece, adopts the welding mode between angle steel and steel sheet support, band steel and the steel sheet support.
Through the arrangement, the contact surface between the prestressed hollow slab and the wall body or the beam can be improved through the angle steel and the steel plate support, and the falling risk is reduced when the prestressed hollow slab and the wall body relatively slide under the earthquake force. Meanwhile, the steel plate support can be used as a connection point of the flat steel, and a plane truss stress system is formed by the steel plate support and the flat steel, so that structural assumption of infinite rigidity of floors is met, and earthquake force is transmitted to the side force resisting component according to design requirements. The flat steel can also be used as an anti-falling measure, and when the prestressed hollow slab and the wall body relatively slide greatly under the earthquake force, the flat steel can be used as an out-of-plane supporting point of the prestressed hollow slab to prevent the prestressed hollow slab from falling off. The flat steel and the steel plate support form a plane truss stress system, and structural assumption of infinite rigidity of floors is met, so that earthquake force is transmitted to the side force resistant member according to design requirements.
The technical scope of the present invention is not limited to the above description, and those skilled in the art may make various changes and modifications to the above-described embodiments without departing from the technical spirit of the present invention, and these changes and modifications should be included in the scope of the present invention.
Claims (3)
1. The prestress hollow plate reinforcing method is characterized by comprising the following steps of:
s1, locally chiseling off a decoration surface layer of an existing building, and processing to an existing building structure base layer;
s2, angle steel is additionally arranged at the periphery of the corresponding prestressed hollow slab, the 45-degree angle cutting is carried out on the end parts of the adjacent angle steel, the adjacent angle steel and the original concrete beam are spliced into a whole, the angle steel is fixedly connected with the original concrete beam through a plurality of anchor bolts, and the hole of the anchor bolts is filled with glue for compaction;
s3, adding steel plate brackets on the inner sides of the splicing parts of the end parts of the two adjacent angle steels, adding a middle block in the center of a room, and connecting the middle block and the four steel plate brackets into a whole through flat steel, so that the flat steel, the middle block and the four steel plate brackets are ensured to be in a plane;
s4, filling gaps among the prestressed hollow plates, the angle steel, the flat steel, the steel plate support and the middle block with mortar.
2. The method for reinforcing the prestressed hollow slab according to claim 1, wherein: the specification of the angle steel is L75 multiplied by 5mm, the bolt is an M12 chemical bolt, and the hole distance from the bottom surface of the hollow plate is 40mm.
3. The method for reinforcing the prestressed hollow slab according to claim 1, wherein: the steel plate support is 175×175×5mm in size, the middle block is 300×250×5mm in size, the flat steel is 50mm wide and 4mm thick, one end of the flat steel is welded with one end of the steel plate support far away from the angle steel splicing end into a whole, and the other end of the flat steel is welded with the middle block into a whole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310979445.8A CN116971642A (en) | 2023-08-04 | 2023-08-04 | Prestress hollow plate reinforcing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310979445.8A CN116971642A (en) | 2023-08-04 | 2023-08-04 | Prestress hollow plate reinforcing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116971642A true CN116971642A (en) | 2023-10-31 |
Family
ID=88471197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310979445.8A Pending CN116971642A (en) | 2023-08-04 | 2023-08-04 | Prestress hollow plate reinforcing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116971642A (en) |
-
2023
- 2023-08-04 CN CN202310979445.8A patent/CN116971642A/en active Pending
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