CN221345613U - Bottom plate of control foundation ditch deformation turns over and trades and prop structure - Google Patents
Bottom plate of control foundation ditch deformation turns over and trades and prop structure Download PDFInfo
- Publication number
- CN221345613U CN221345613U CN202323211787.XU CN202323211787U CN221345613U CN 221345613 U CN221345613 U CN 221345613U CN 202323211787 U CN202323211787 U CN 202323211787U CN 221345613 U CN221345613 U CN 221345613U
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- China
- Prior art keywords
- bottom plate
- support
- foundation pit
- replacing
- wallboard
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 13
- 239000010959 steel Substances 0.000 claims abstract description 13
- 239000004567 concrete Substances 0.000 claims abstract description 11
- 230000007306 turnover Effects 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 5
- JHJNPOSPVGRIAN-SFHVURJKSA-N n-[3-[(1s)-1-[[6-(3,4-dimethoxyphenyl)pyrazin-2-yl]amino]ethyl]phenyl]-5-methylpyridine-3-carboxamide Chemical compound C1=C(OC)C(OC)=CC=C1C1=CN=CC(N[C@@H](C)C=2C=C(NC(=O)C=3C=C(C)C=NC=3)C=CC=2)=N1 JHJNPOSPVGRIAN-SFHVURJKSA-N 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 4
- 239000002689 soil Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Abstract
The utility model relates to a bottom plate upturning support structure for controlling foundation pit deformation, wherein the foundation pit comprises an enclosure structure and an underground structure, and the underground structure comprises a bottom plate structure and a wallboard structure, and is characterized in that: the support replacing structure is arranged between the bottom plate structure and the wallboard structure, the height of the support replacing mechanism is larger than that of the bottom plate structure, and the support replacing structure and the steel bars of the bottom plate structure are synchronously bound and poured with concrete to form a whole. And after the concrete construction of the support changing structure and the bottom plate structure is completed, an integrated stress system is formed with the enclosure structure. Compared with the prior art, the support replacing structure and the bottom plate form an integrated structure, the stress characteristics of the structure are clear, the construction is safe and reliable, and the deformation of a support system can be reduced; the turnover support structure on the bottom plate is good in setting position, and convenient to construct; the engineering cost is low, and the method is more economical and convenient compared with the method for increasing the section steel support replacement.
Description
Technical Field
The utility model relates to a supporting structure for controlling deformation of a foundation pit, in particular to a bottom plate upturning support replacing structure for solving the problem that the external active pressure of an enclosure outer wall is overlarge after the last support of the foundation pit is removed.
Background
Along with the continuous development of underground space, foundation pit excavation is developed towards a deeper and larger direction, and in foundation pit engineering construction in Shanghai soft soil areas, the position of a deep foundation pit is usually in downtown areas, and the complicated environment enables the surrounding environment to have higher protection requirements, so that the deformation control difficulty of a foundation pit support structure is higher. A large amount of experience data accumulated by foundation pit engineering show that the maximum value of foundation pit displacement deformation is easy to generate at the joint of the pit bottom and the basement bottom plate; in addition, when the underground main body structure is constructed to a certain stage, the support has to be removed in advance, and the vertical span of the support of the enclosure structure is too large, so that the lateral rigidity of the enclosure is enabled to bear too large lateral soil pressure, and finally the displacement deformation requirement of the foundation pit cannot be met. If a new method for adding the supporting system is adopted, the construction cost is high and the engineering cost is also increased. Therefore, the support replacing structure is required to be invented, so that the internal stress of the support structure is gradually transferred and redistributed before all supports are removed, and the safety and stability of the foundation pit support structure are ensured.
Disclosure of Invention
The utility model provides a bottom plate upturning support changing structure for controlling foundation pit deformation, which aims to solve the problem that the external active pressure of an enclosure outer wall is overlarge after the last support of a foundation pit is removed.
In order to achieve the technical purpose, the utility model adopts the following technical scheme: a turn over on bottom plate that is used for controlling foundation ditch to warp and trade and prop structure, the foundation ditch includes envelope and underground structure, underground structure includes bottom plate structure and wallboard structure, wherein trade and prop the structure and set up bottom plate structure with between the wallboard structure, and trade the height that props the mechanism and be greater than bottom plate structure's height, trade and prop the structure with bottom plate structure's reinforcing bar synchronous ligature and pour the concrete together, form a whole.
Preferably, the steel bars of the support changing structure are embedded into the bottom plate structure to a preset depth, so that the support changing structure and the bottom plate structure are connected into a whole.
Preferably, a step is formed between the bracing structure and the base plate structure, and the wall plate structure is formed on the step.
Preferably, the surface of the support changing structure facing the underground structure and the top surface of the step are rough surfaces.
Preferably, a water stop steel plate is provided in the step and extends upwardly into the wall panel structure.
Compared with the prior art, the utility model has the beneficial effects that:
1. The support replacing structure and the bottom plate form an integral body, the stress characteristics of the structure are clear, the construction is safe and reliable, and the deformation of the support system can be reduced.
2. The turnover support structure on the bottom plate is good in setting position and convenient to construct.
3. The engineering cost is low, and the method is more economical and convenient compared with the method for increasing the section steel support replacement.
Drawings
Fig. 1 is a schematic cross-sectional view of a casting of a floor structure according to an embodiment of the utility model.
Fig. 2 is a partial enlarged view of fig. 1.
Fig. 3 is a schematic cross-sectional view of a wall panel construction casting according to an embodiment of the utility model.
Detailed Description
The utility model is further illustrated in the following, in conjunction with the accompanying drawings and detailed embodiments. These examples are given solely for the purpose of illustration and are not intended to limit the scope of the utility model, and various changes and modifications may be made by one skilled in the art after reading the teachings of this utility model, which equivalents are also intended to fall within the scope of the utility model as defined in the appended claims.
As shown in figure 1, the utility model relates to a bottom plate upturning support structure for controlling foundation pit deformation, which is arranged between an enclosure structure and an underground structure of a foundation pit. In the present embodiment, the enclosure is a enclosure pile 1, the underground structure is a basement 2, and the stay exchange structure 3 is provided at a gap between the enclosure pile 1 and the basement 2. The basement 2 comprises a floor structure 2a and a wall panel structure 2b. The support changing structure 3 and the steel bars of the bottom plate structure 2a are synchronously bound and poured together to form a whole. The reinforcing steel bars of the support changing structure 3 are anchored and embedded into the bottom plate structure 2b to a preset depth, so that the support changing structure 3 and the bottom plate structure 2a are connected into a whole, and the force transmission reliability of the support changing structure is ensured.
The height of the support changing mechanism 3 is larger than that of the bottom plate structure 2 a. A step 4 is formed between the bracing structure 3 and the base plate structure 2a, and a wall plate structure 2b is formed on the step 4. Both the surface of the support changing structure 2b facing the basement 2 and the top surface of the step 4 are roughened, as shown enlarged in fig. 2. In the step 4, a water stop steel plate 5 is provided, the water stop steel plate 5 extending upwardly into the wall panel structure 2 b.
The support changing structure 3 and the concrete operation of the bottom plate structure 2a are constructed together, and an integrated stress system is formed with the fender post 1 after the construction of the support changing structure and the concrete operation of the bottom plate structure are completed. Then, the wall panel structure 2b of the basement 2 is poured again, and the completed structure is shown in fig. 3.
And finally, the integrated stress system after the concrete pouring operation withstands the soil pressure outside the building enclosure 3, and the internal stress of the structure is transferred and redistributed, so that the safety and stability of the foundation pit building enclosure are ensured, and finally, the deformation of the external environment of the foundation pit is reduced.
The upward-turning support-changing structure of the bottom plate is arranged at the gap between the enclosure structure and the basement outer wall, the binding with the basement bottom plate steel bars should be kept synchronous, and the concrete pouring operation should be carried out simultaneously, so that the support-changing structure and the foundation pit bottom plate structure are integrated, the enclosure outer walls on two sides are communicated with the support-changing structure and the integrated structure of the basement bottom plate to form a new stress system, the redistribution and the transfer of internal forces of the structure can effectively control the displacement deformation of the bottom of the foundation pit, and the safety coefficient of foundation pit construction is improved. The structure is particularly suitable for deep foundation pit construction with high environmental protection grade outside the foundation pit.
The utility model relates to a concrete construction method of a turnover support structure on a bottom plate, which comprises the following steps:
step one, calculating the internal force of the support pile under the most unfavorable working condition according to calculation;
step two, calculating according to the internal force value, and reversely pushing the design to ensure that the support changing structure with the enclosure deformation meeting the requirement turns up the height;
thirdly, carrying out reinforcement calculation according to the internal force value calculated according with the requirements of the enclosure deformation;
Step four, synchronously binding the steel bars and the steel bars of the basement bottom plate, and integrally replacing the support structure and pouring concrete of the bottom plate;
And fifthly, after the strength grade of the concrete with the support changing structure reaches the design strength, the reinforced concrete support can be removed, and a new force transmission system starts to bear force to inhibit deformation displacement of the foundation pit.
Claims (4)
1. The utility model provides a turn over on control foundation ditch deformed bottom plate and trade support structure, the foundation ditch includes envelope and underground structure, underground structure includes bottom plate structure and wallboard structure, its characterized in that: the support replacing structure is arranged between the enclosure structure and the wallboard structure, the height of the support replacing structure is larger than that of the bottom plate structure, the support replacing structure and the steel bars of the bottom plate structure are synchronously bound and poured with concrete to form a whole, a step is formed between the support replacing structure and the bottom plate structure, and the wallboard structure is formed on the step.
2. The floor up-turning support structure for controlling deformation of foundation pit according to claim 1, wherein: the reinforcing steel bars of the support replacing structure are embedded into the bottom plate structure to a preset depth, so that the support replacing structure and the bottom plate structure are connected into a whole.
3. The floor up-turning support structure for controlling deformation of foundation pit according to claim 1, wherein: the surface of the support changing structure facing the underground structure and the top surface of the step are rough surfaces.
4. The floor up-turning support structure for controlling deformation of foundation pit according to claim 1, wherein: the water stop steel plate is arranged in the step and extends upwards into the wallboard structure.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221345613U true CN221345613U (en) | 2024-07-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant |