CN114908770A - Reconstruction and reinforcement method for building foundation pit diaphragm wall structure - Google Patents
Reconstruction and reinforcement method for building foundation pit diaphragm wall structure Download PDFInfo
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- CN114908770A CN114908770A CN202210615497.2A CN202210615497A CN114908770A CN 114908770 A CN114908770 A CN 114908770A CN 202210615497 A CN202210615497 A CN 202210615497A CN 114908770 A CN114908770 A CN 114908770A
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- foundation pit
- reinforcing
- wall structure
- diaphragm wall
- pasting
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- 238000000034 method Methods 0.000 title claims abstract description 43
- 230000002787 reinforcement Effects 0.000 title claims abstract description 12
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 44
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 32
- 239000010959 steel Substances 0.000 claims abstract description 32
- 239000003733 fiber-reinforced composite Substances 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 18
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 18
- 238000012545 processing Methods 0.000 claims abstract description 9
- 239000004567 concrete Substances 0.000 claims description 17
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 15
- 239000004917 carbon fiber Substances 0.000 claims description 15
- 239000004744 fabric Substances 0.000 claims description 15
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 15
- 238000002513 implantation Methods 0.000 claims description 8
- 239000003292 glue Substances 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 238000003672 processing method Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000009412 basement excavation Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000009430 construction management Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
Abstract
The invention provides a reconstruction and reinforcement method of a building foundation pit diaphragm wall structure, which comprises the following specific steps: the first step is as follows: a first reinforced concrete inner support and four steel inner supports are adopted at a main body supporting site; the second step: processing by adopting a pasting fiber reinforced composite material and implanting, mixing and reinforcing by using embedded bars on the auxiliary supporting points; the interior of the reinforced wall-connected foundation pit is divided into a main body supporting site and an auxiliary supporting site, the interior of the main body supporting site which is convenient to construct is reinforced by increasing the cross section, the main body supporting site is supported by a first reinforced concrete inner support and four steel inner supports, the supporting strength is strong, high-strength support can be carried out, the auxiliary supporting site is processed by adopting a bonded fiber reinforced composite material and mixed reinforced by planting bars, the overall performance is good, the advantages of simplicity and convenience in construction, small working surface, strong adaptability, low manufacturing cost and the like are achieved, and the reinforced wall-connected foundation pit is suitable for carrying out small-range reinforcing support on the auxiliary supporting site.
Description
Technical Field
The invention belongs to the technical field of wall-connected pit reinforcement, and relates to a method for improving and reinforcing a ground-connected wall structure of a building foundation pit.
Background
With the gradual acceleration of the urbanization process, the height of buildings is continuously increased, but the requirement of people for space cannot be met. As the utilization rate of underground space becomes higher and higher, underground space structures of various purposes such as underground malls, parking lots, underground civil defense works, various civilians and public facilities have been on the stage in large and medium cities throughout the country. With the appearance of a large number of super high-rise buildings, the depth of a needed foundation is gradually increased, and foundation pit engineering is developing towards the direction of larger area, deeper depth and higher utilization rate.
Although underground buildings have huge excavation potential and wide development space, the existing foundation pit supporting engineering has the problems of large number, large scale, large difficulty and the like. Factors such as the complicated geological structure of the stratum, the local defectiveness of the design, the imperfection of the construction management and the like bring severe tests to the stability of the foundation pit slope. The collapse accident of the side slope with large collapse will cause serious economic loss and casualties. Therefore, the research on the supporting structure of the foundation pit is more necessary.
For some complicated geological conditions, the surrounding soil is often unstable in the excavation construction process of the foundation pit and damages the adjacent buildings on the ground or pipelines below the ground, the cantilever type supporting structure has high requirements on the excavation depth, large deformation is easily generated when the excavation depth is deep, the distance between adjacent buildings becomes shorter and shorter along with the development of urbanization, the horizontal displacement control requirements on the supporting structure are strict, and meanwhile, the deformation of the soil is strictly controlled to meet the condition of not damaging the surrounding buildings, so that the foundation pit with the wall-connected structure needs to be improved in supporting.
Disclosure of Invention
The invention aims to provide a method for improving and reinforcing a foundation pit diaphragm wall structure of a building, so as to solve the problems in the background technology.
The purpose of the invention can be realized by the following technical scheme:
a method for improving and reinforcing a foundation pit diaphragm wall structure of a building comprises the following specific steps:
the first step is as follows: the method comprises the following steps of (1) carrying out reinforcement detection on a wall connecting structure of a building foundation pit, wherein the wall connecting structure comprises the depth of the foundation pit, the type and the width of the wall connecting structure, determining a main body supporting site, and adopting a first reinforced concrete inner support and four steel inner supports at the main body supporting site;
the second step is as follows: and determining an auxiliary supporting site, and adopting the processing of pasting fiber reinforced composite materials and the mixed reinforcement of bar planting implantation on the auxiliary supporting site.
In the above method for reconstructing and reinforcing the underground diaphragm wall structure of the building foundation pit, in the first step, the first reinforced concrete inner support is a reinforced concrete inner support with a cross-sectional dimension of 800mm × 800mm, and the horizontal distance therebetween is 9 m.
In the method for reconstructing and reinforcing the underground diaphragm wall structure of the building foundation pit, in the first step, the four steel inner supports are steel pipe inner supports of 609@16, the horizontal distance is 3m, and the middle part of the supporting structure is provided with a lattice type temporary upright post.
In the method for reconstructing and reinforcing the diaphragm wall structure of the building foundation pit, the main supporting site is a standard section for supporting the main foundation pit, and the auxiliary supporting site is a non-standard section for supporting the main foundation pit.
In the method for reconstructing and reinforcing the underground diaphragm wall structure of the building foundation pit, a fiber reinforced composite material pasting reinforcing method and bar planting implantation processing are adopted when the nonstandard section of the main foundation pit inner support is reinforced.
In the above method for improving and reinforcing the underground diaphragm wall structure of the building foundation pit, the concrete method for reinforcing by adhering the fiber reinforced composite material is as follows:
and determining a pasting area of the support nonstandard section in the main foundation pit, wherein the pasting area is mainly selected as a concrete flexural member, and simultaneously determining the reinforcing amount of the pasting fiber reinforced composite material in different pasting areas so as to finish the reinforcing and pasting operation.
In the method for reconstructing and reinforcing the underground diaphragm wall structure of the building foundation pit, the bonded fiber reinforced composite material is bonded carbon fiber cloth, the bonding thickness of the bonded carbon fiber cloth is 0.165mm, and the fiber weight of the bonded carbon fiber cloth is 400g/m 2 The elastic modulus of the pasted carbon fiber cloth is 4.00 multiplied by 10 5 Mpa, and the tensile strength of the pasted carbon fiber cloth is 3000 Mpa.
In the above method for improving and reinforcing the underground diaphragm wall structure of the building foundation pit, the concrete operations of the bar planting implantation processing are as follows:
according to the stress characteristics of the structure, the required position of the steel bar is determined on the old concrete component needing steel bar planting, drilling, cleaning holes, injecting steel bar planting glue to insert the steel bar, the steel bar and the concrete are reliably bonded through the structural glue, and the new concrete is poured to effectively connect the new and old reinforced concrete.
Compared with the prior art, the method for improving and reinforcing the underground diaphragm wall structure of the building foundation pit has the advantages that:
the interior of the reinforced wall foundation pit is divided into a main body supporting site and an auxiliary supporting site, the interior of the main body supporting site which is convenient to construct is reinforced by increasing the cross section, the main body supporting site is supported by a first reinforced concrete inner support and four steel inner supports, the supporting force is strong, high-strength support can be carried out, the auxiliary supporting site is processed by adopting a bonded fiber reinforced composite material and mixed reinforcement by planting bars, the overall performance is good, the advantages of simplicity and convenience in construction, small working surface, strong adaptability, low manufacturing cost and the like are realized, and the reinforced wall foundation pit is suitable for carrying out small-range reinforced support on the auxiliary supporting site.
Drawings
Fig. 1 is a schematic structural diagram of a method for improving and reinforcing a foundation pit diaphragm wall structure of a building according to the invention.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
A method for improving and reinforcing a foundation pit diaphragm wall structure of a building comprises the following specific steps:
the first step is as follows: the method comprises the following steps of performing reinforcement detection on a wall connecting structure of a building foundation pit, wherein the reinforcement detection comprises the depth of the foundation pit, the type and the width of the wall connecting structure, determining a main body supporting site, and adopting a first reinforced concrete inner support and four steel inner supports at the main body supporting site;
the second step is as follows: and determining an auxiliary supporting site, and adopting the processing of pasting fiber reinforced composite materials and the mixed reinforcement of bar planting implantation on the auxiliary supporting site.
As shown in fig. 1, in the method for reconstructing and reinforcing the underground diaphragm wall structure of the foundation pit, in the first step, the first reinforced concrete inner support is a reinforced concrete inner support with the cross-sectional dimension of 800mm × 800mm, and the horizontal distance between the reinforced concrete inner supports is 9 m.
As shown in fig. 1, in the method for reconstructing and reinforcing the underground diaphragm wall structure of the foundation pit, in the first step, four steel inner supports are 609@16 steel inner supports, the horizontal distance is 3m, and a lattice type temporary upright post is arranged in the middle of a supporting structure.
As shown in fig. 1, in the method for reconstructing and reinforcing the underground diaphragm wall structure of the building foundation pit, the main body supporting site is a standard section of the main body foundation pit inner support, and the auxiliary supporting site is a non-standard section of the main body foundation pit inner support.
As shown in fig. 1, in the method for improving and reinforcing the diaphragm wall structure of the building foundation pit, a fiber reinforced composite material pasting reinforcing method and a steel bar implanting implantation processing are adopted when the nonstandard section of the inner support of the main foundation pit is reinforced.
As shown in fig. 1, the method for improving and reinforcing the underground diaphragm wall structure of the building foundation pit of the present invention comprises the following specific steps:
and determining a pasting area of the support nonstandard section in the main foundation pit, wherein the pasting area is mainly selected as a concrete flexural member, and simultaneously determining the reinforcing amount of the pasting fiber reinforced composite material in different pasting areas so as to finish the reinforcing and pasting operation.
As shown in figure 1, according to the method for improving and reinforcing the underground diaphragm wall structure of the building foundation pit, the pasting fiber reinforced composite material is pasting carbon fiber cloth, the pasting thickness of the pasting carbon fiber cloth is 0.165mm, and the fiber weight of the pasting carbon fiber cloth is 400g/m 2 The elastic modulus of the pasted carbon fiber cloth is 4.00 multiplied by 10 5 Mpa, and the tensile strength of the pasted carbon fiber cloth is 3000 Mpa.
As shown in fig. 1, the concrete operations of the embedded steel bar implantation processing of the method for improving and reinforcing the underground diaphragm wall structure of the building foundation pit of the present invention are as follows:
according to the stress characteristics of the structure, the required position of the steel bar is determined on the old concrete component needing steel bar planting, drilling, cleaning holes, injecting steel bar planting glue to insert the steel bar, the steel bar and the concrete are reliably bonded through the structural glue, and the new concrete is poured to effectively connect the new and old reinforced concrete.
The invention relates to a method for improving and reinforcing a ground connection wall structure of a building foundation pit, which divides the interior of a reinforced connection wall foundation pit into a main body supporting site and an auxiliary supporting site, wherein the main body supporting site with convenient construction is reinforced by increasing the cross section, the first reinforced concrete inner support and four steel inner supports are used for supporting, the supporting strength is strong, high-strength supporting can be carried out, the auxiliary supporting site is processed by adopting a pasting fiber reinforced composite material and is mixed and reinforced by planting bars, the overall performance is good, the method has the advantages of simple and convenient construction, small working surface, strong adaptability, low manufacturing cost and the like, and is suitable for carrying out small-range reinforcing and supporting on the auxiliary supporting site.
Those not described in detail in this specification are within the skill of the art. The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (8)
1. A method for reconstructing and reinforcing a foundation pit diaphragm wall structure is characterized by comprising the following specific steps:
the first step is as follows: the method comprises the following steps of (1) carrying out reinforcement detection on a wall connecting structure of a building foundation pit, wherein the wall connecting structure comprises the depth of the foundation pit, the type and the width of the wall connecting structure, determining a main body supporting site, and adopting a first reinforced concrete inner support and four steel inner supports at the main body supporting site;
the second step is as follows: and determining an auxiliary supporting site, and adopting the processing of pasting fiber reinforced composite materials and the mixed reinforcement of bar planting implantation on the auxiliary supporting site.
2. The method for improving and reinforcing the underground diaphragm wall structure of the foundation pit according to the claim 1, wherein in the first step, the first reinforced concrete inner support is a reinforced concrete inner support with the cross-sectional dimension of 800mm x 800mm, and the horizontal distance between the reinforced concrete inner supports is 9 m.
3. The method for improving and reinforcing the underground diaphragm wall structure of the foundation pit according to claim 1, wherein in the first step, the four steel inner supports are middle 609@16 steel pipe inner supports, the horizontal distance between the middle steel inner supports is 3m, and a lattice type temporary upright post is arranged in the middle of the supporting structure.
4. The method for improving and reinforcing the underground diaphragm wall structure of the foundation pit according to claim 1, wherein the main supporting site is a standard section supported in the main foundation pit, and the auxiliary supporting site is a non-standard section supported in the main foundation pit.
5. The method for improving and reinforcing the underground diaphragm wall structure of the building foundation pit according to claim 1, wherein a fiber reinforced composite material pasting reinforcing method and a steel bar implanting processing method are adopted during reinforcing the nonstandard section of the main foundation pit support.
6. The method for improving and reinforcing the underground diaphragm wall structure of the building foundation pit according to the claim 1, wherein the concrete method for reinforcing by sticking the fiber reinforced composite material is as follows:
and determining a pasting area of the support nonstandard section in the main foundation pit, wherein the pasting area is mainly selected as a concrete flexural member, and simultaneously determining the reinforcing amount of the pasting fiber reinforced composite material in different pasting areas so as to finish the reinforcing and pasting operation.
7. The method for improving and reinforcing the underground diaphragm wall structure of the building foundation pit according to claim 1, wherein the bonded fiber reinforced composite material is bonded carbon fiber cloth, the bonding thickness of the bonded carbon fiber cloth is 0.165mm, and the fiber weight of the bonded carbon fiber cloth is 400g/m 2 The elastic modulus of the adhered carbon fiber cloth is 4.00 multiplied by 10 5 Mpa, the tensile strength of the pasted carbon fiber cloth is 3000Mpa。
8. The method for improving and reinforcing the diaphragm wall structure of the foundation pit according to claim 1, wherein the concrete operations of the bar planting implantation processing are as follows:
according to the stress characteristics of the structure, the required position of the steel bar is determined on the old concrete member needing steel bar planting, the steel bar is inserted by drilling, cleaning holes and injecting steel bar planting glue, the steel bar and the concrete are reliably bonded through the structural glue, and the new concrete is poured to effectively connect the new and the old reinforced concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210615497.2A CN114908770A (en) | 2022-05-31 | 2022-05-31 | Reconstruction and reinforcement method for building foundation pit diaphragm wall structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210615497.2A CN114908770A (en) | 2022-05-31 | 2022-05-31 | Reconstruction and reinforcement method for building foundation pit diaphragm wall structure |
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| CN114908770A true CN114908770A (en) | 2022-08-16 |
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| CN202210615497.2A Pending CN114908770A (en) | 2022-05-31 | 2022-05-31 | Reconstruction and reinforcement method for building foundation pit diaphragm wall structure |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020170651A1 (en) * | 2001-05-15 | 2002-11-21 | Edwards Christopher M. | Method for reinforcing cementitious structures |
| CN205531421U (en) * | 2015-12-03 | 2016-08-31 | 山东科技大学 | Adopt carbon fiber to consolidate structure of reinforced concrete roof beam |
| CN108487252A (en) * | 2018-03-13 | 2018-09-04 | 中铁第四勘察设计院集团有限公司 | A kind of deep foundation pit open cutting is suitable to make construction method |
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2022
- 2022-05-31 CN CN202210615497.2A patent/CN114908770A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020170651A1 (en) * | 2001-05-15 | 2002-11-21 | Edwards Christopher M. | Method for reinforcing cementitious structures |
| CN205531421U (en) * | 2015-12-03 | 2016-08-31 | 山东科技大学 | Adopt carbon fiber to consolidate structure of reinforced concrete roof beam |
| CN108487252A (en) * | 2018-03-13 | 2018-09-04 | 中铁第四勘察设计院集团有限公司 | A kind of deep foundation pit open cutting is suitable to make construction method |
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