CN110656785A - Process for reinforcing cracked floor by laminated slab - Google Patents
Process for reinforcing cracked floor by laminated slab Download PDFInfo
- Publication number
- CN110656785A CN110656785A CN201910857339.6A CN201910857339A CN110656785A CN 110656785 A CN110656785 A CN 110656785A CN 201910857339 A CN201910857339 A CN 201910857339A CN 110656785 A CN110656785 A CN 110656785A
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- floor slab
- steel bars
- floor
- slab
- reinforcing
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- 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
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- 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 relates to a process for reinforcing a cracked floor slab by using a laminated slab, which comprises the following steps: the method comprises the following steps: roughening the floor surface, wherein the roughening depth ranges from 4 mm to 6 mm; step two: planting ribs on a wall or a beam around a floor slab, wherein the planted ribs are first implanted steel bars, the diameter of the first steel bars is smaller than 8mm, the implanted depth is 150mm, and the overhanging lengths of the first steel bars are different and staggered; according to the invention, the floor slab building surface layer is utilized to reinforce the floor slab, the post-cast building surface layer and the original floor slab form a laminated slab through the arrangement of the reinforcing steel bars and the arrangement of the shear keys in the building surface layer, and the laminated slab and the original floor slab are stressed together, so that the effects of not increasing the final thickness of the floor slab and the additional load of the floor slab, eliminating the potential safety hazard of the floor slab are achieved, and the attractiveness of the floor slab is kept through newly pouring concrete.
Description
Technical Field
The invention relates to the field of buildings, in particular to a process for reinforcing a cracked floor slab by using a laminated slab.
Background
In the construction process, the hogging moment steel bar of the floor slab support is frequently stepped on, so that a hogging moment steel bar protective layer is overlarge, and after the floor slab is demoulded and stressed, the bottom of the floor slab or the support part is easy to crack, so that great potential safety hazards are caused.
In general, a reinforcing method of attaching carbon fibers to the bottom of a slab can be adopted to reinforce the slab, but the carbon fibers are exposed, and residents see the carbon fibers, so that the floor is not attractive, and therefore, a reinforcing process for reinforcing the cracked floor is urgently needed to eliminate potential safety hazards and does not influence the appearance of the floor.
Disclosure of Invention
The invention aims to provide a process for reinforcing a cracked floor slab by using a laminated slab, which is used for reinforcing the cracked floor slab so as to eliminate potential safety hazards and not influence the appearance.
The purpose of the invention is realized as follows:
a technology for reinforcing a cracked floor slab by using a laminated slab comprises the following steps:
the method comprises the following steps: roughening the floor surface, wherein the roughening depth ranges from 4 mm to 6 mm;
step two: planting ribs on a wall or a beam around a floor slab, wherein the planted ribs are first implanted steel bars, the diameter of the first steel bars is smaller than 8mm, the implanted depth is 150mm, and the overhanging lengths of the first steel bars are different and staggered;
step three: shear force keys are implanted into the floor slab at intervals, the shear force keys are second steel bars, the diameter of the second steel bars is smaller than 8mm, the shear force keys are implanted into the floor slab, and the depth of the implanted shear force keys is smaller than the thickness of the floor slab by 20 mm;
step four: the reinforcing mesh is tied in the building surface layer, the reinforcing mesh is made of third reinforcing steel bars, and the diameter of the third reinforcing steel bars is smaller than 8 mm;
step four: binding and lapping the third steel bars and the embedded bars, and placing a steel bar mesh on the shear keys to be connected with the shear resistant keys by spot welding;
step five: cleaning the garbage on the floor surface and keeping the floor surface in a wet state;
step six: brushing an interface agent on the floor surface (the new and old concrete joint surface);
step seven: pouring by adopting micro-expansive concrete, performing one-step forming along with tamping and smearing, and maintaining for more than 10 days in a wet manner.
According to the invention, the floor slab building surface layer is utilized to reinforce the floor slab, the post-cast building surface layer and the original floor slab form a laminated slab through the arrangement of the reinforcing steel bars and the arrangement of the shear keys in the building surface layer, and the laminated slab and the original floor slab are stressed together, so that the effects of not increasing the final thickness of the floor slab and the additional load of the floor slab, eliminating the potential safety hazard of the floor slab are achieved, and the attractiveness of the floor slab is kept through newly pouring concrete.
The aim of the invention can also be solved by the following technical measures:
more specifically, if a building finish is poured on the floor surface, the building finish needs to be removed.
More specifically, the shear key is made of HRB 400-grade steel bars.
The invention has the following beneficial effects:
according to the invention, the floor slab building surface layer is utilized to reinforce the floor slab, the post-cast building surface layer and the original floor slab form a laminated slab through the arrangement of the reinforcing steel bars and the arrangement of the shear keys in the building surface layer, and the laminated slab and the original floor slab are stressed together, so that the effects of not increasing the final thickness of the floor slab and the additional load of the floor slab, eliminating the potential safety hazard of the floor slab are achieved, and the attractiveness of the floor slab is kept through newly pouring concrete.
Drawings
Figure 1 is a schematic plan view of a floor.
Fig. 2 is an enlarged view of a portion B of fig. 1.
Fig. 3 is a sectional view a-a of fig. 1.
FIG. 4 is a shear key schematic.
Detailed Description
The invention is further described with reference to the following figures and examples:
in an embodiment, with reference to fig. 1 to 4, a process for reinforcing a cracked floor slab by using a laminated slab includes the following steps:
the method comprises the following steps: roughening the floor surface 1 to a roughening depth of 4-6 mm;
step two: planting ribs 2 on a wall body or a beam around a floor slab, wherein the planted ribs are first implanted steel bars, the diameter of the first steel bars is smaller than 8mm, the implantation depth is 150mm, and the extending lengths of the first steel bars are different and staggered;
step three: the shear keys 3 are implanted into the floor at intervals, the shear keys 3 are second steel bars, the diameter of the second steel bars is smaller than 8mm, the shear keys 3 are implanted into the floor, and the depth of the implanted shear keys 3 is smaller than the thickness of the floor by 20 mm;
step four: a reinforcing mesh 5 is tied in the building surface layer 4, the reinforcing mesh 5 is made of third reinforcing steel bars, and the diameter of the third reinforcing steel bars is smaller than 8 mm;
step four: binding and lapping the third steel bar and the embedded bar 2, and placing a steel bar mesh 5 on the shear key 3 to be connected with the shear resistant key by spot welding;
step five: cleaning the garbage on the floor surface 1 and keeping the floor surface 1 in a wet state;
step six: brushing an interface agent 6 on the floor surface 1 (the new and old concrete joint surface);
step seven: pouring by adopting micro-expansive concrete, performing one-step forming along with tamping and smearing, and maintaining for more than 10 days in a wet manner.
More specifically, if the building surface 7 is poured on the floor surface 1, the building surface 4 needs to be removed.
More specifically, the shear key 3 is made of HRB 400-grade steel bars.
Claims (3)
1. A technology for reinforcing a cracked floor slab by using a laminated slab is characterized by comprising the following steps:
the method comprises the following steps: roughening the floor surface, wherein the roughening depth ranges from 4 mm to 6 mm;
step two: planting ribs on a wall or a beam around a floor slab, wherein the planted ribs are first implanted steel bars, the diameter of the first steel bars is smaller than 8mm, the implanted depth is 150mm, and the overhanging lengths of the first steel bars are different and staggered;
step three: shear force keys are implanted into the floor slab at intervals, the shear force keys are second steel bars, the diameter of the second steel bars is smaller than 8mm, the shear force keys are implanted into the floor slab, and the depth of the implanted shear force keys is smaller than the thickness of the floor slab by 20 mm;
step four: the reinforcing mesh is tied in the building surface layer, the reinforcing mesh is made of third reinforcing steel bars, and the diameter of the third reinforcing steel bars is smaller than 8 mm;
step four: binding and lapping the third steel bars and the embedded bars, and placing a steel bar mesh on the shear keys to be connected with the shear resistant keys by spot welding;
step five: cleaning the garbage on the floor surface and keeping the floor surface in a wet state;
step six: brushing an interface agent on the floor surface (the new and old concrete joint surface);
step seven: pouring by adopting micro-expansive concrete, performing one-step forming along with tamping and smearing, and maintaining for more than 10 days in a wet manner.
2. The process for reinforcing a cracked floor slab by using the laminated slab as claimed in claim 1, wherein the process comprises the following steps: if the building surface layer is poured on the floor surface, the building surface layer needs to be removed.
3. The process for reinforcing a cracked floor slab by using the laminated slab as claimed in claim 1, wherein the process comprises the following steps: the shear key adopts HRB400 grade steel bars.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910857339.6A CN110656785A (en) | 2019-09-11 | 2019-09-11 | Process for reinforcing cracked floor by laminated slab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910857339.6A CN110656785A (en) | 2019-09-11 | 2019-09-11 | Process for reinforcing cracked floor by laminated slab |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110656785A true CN110656785A (en) | 2020-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910857339.6A Pending CN110656785A (en) | 2019-09-11 | 2019-09-11 | Process for reinforcing cracked floor by laminated slab |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202011005658U1 (en) * | 2011-04-28 | 2011-07-20 | Georg Ritter | System for the rehabilitation of truss ceilings |
| CN205617829U (en) * | 2016-04-14 | 2016-10-05 | 中震（北京）工程检测股份有限公司 | Concrete floor protective layer peels off and leaks rusty restoration structure of muscle |
| CN206487167U (en) * | 2016-12-30 | 2017-09-12 | 西安五和土木工程新材料有限公司 | A kind of reinforcing device for slab |
| CN206942194U (en) * | 2017-07-07 | 2018-01-30 | 金川集团股份有限公司 | One kind is without support beam floor ruggedized construction |
| CN207960000U (en) * | 2017-12-20 | 2018-10-12 | 江苏意统加固行工程有限公司 | A kind of reinforcing floor construction |
| CN208486582U (en) * | 2018-06-07 | 2019-02-12 | 宏林建设工程集团有限公司 | A kind of concrete folding layer and connecting structure of wall |
-
2019
- 2019-09-11 CN CN201910857339.6A patent/CN110656785A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202011005658U1 (en) * | 2011-04-28 | 2011-07-20 | Georg Ritter | System for the rehabilitation of truss ceilings |
| CN205617829U (en) * | 2016-04-14 | 2016-10-05 | 中震（北京）工程检测股份有限公司 | Concrete floor protective layer peels off and leaks rusty restoration structure of muscle |
| CN206487167U (en) * | 2016-12-30 | 2017-09-12 | 西安五和土木工程新材料有限公司 | A kind of reinforcing device for slab |
| CN206942194U (en) * | 2017-07-07 | 2018-01-30 | 金川集团股份有限公司 | One kind is without support beam floor ruggedized construction |
| CN207960000U (en) * | 2017-12-20 | 2018-10-12 | 江苏意统加固行工程有限公司 | A kind of reinforcing floor construction |
| CN208486582U (en) * | 2018-06-07 | 2019-02-12 | 宏林建设工程集团有限公司 | A kind of concrete folding layer and connecting structure of wall |
Non-Patent Citations (1)
| Title |
|---|
| 卜良桃: "《建筑结构检测鉴定与加固概论及工程实例》", 30 June 2013 * |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200107 |
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| RJ01 | Rejection of invention patent application after publication |