CN220768086U - Novel enclosure structure of multilayer pre-diagonal bracing - Google Patents
Novel enclosure structure of multilayer pre-diagonal bracing Download PDFInfo
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- CN220768086U CN220768086U CN202322161535.4U CN202322161535U CN220768086U CN 220768086 U CN220768086 U CN 220768086U CN 202322161535 U CN202322161535 U CN 202322161535U CN 220768086 U CN220768086 U CN 220768086U
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 109
- 239000010959 steel Substances 0.000 claims abstract description 109
- 239000010410 layer Substances 0.000 claims description 38
- 239000002689 soil Substances 0.000 claims description 32
- 210000001503 joint Anatomy 0.000 claims description 21
- 239000002344 surface layer Substances 0.000 claims description 8
- 239000011378 shotcrete Substances 0.000 claims description 5
- 238000009412 basement excavation Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 6
- 230000008093 supporting effect Effects 0.000 abstract description 5
- 238000005452 bending Methods 0.000 abstract description 3
- 238000001556 precipitation Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The utility model discloses a novel enclosure structure with multilayer pre-diagonal braces, which comprises an underground continuous wall positioned at the inner side of a foundation pit, wherein a fixing device is buried in the underground continuous wall, a first prefabricated steel pipe diagonal brace and a second prefabricated steel pipe diagonal brace are respectively installed on the fixing device, a connecting support is installed at one end, far away from the fixing device, of each of the first prefabricated steel pipe diagonal brace and the second prefabricated steel pipe diagonal brace, and upright piles are arranged at the outer side of the underground continuous wall. The novel enclosure structure of the multilayer pre-inclined strut is formed by adopting the underground continuous wall, the first prefabricated steel pipe inclined strut, the second prefabricated steel pipe inclined strut and the upright post pile, can effectively resist bending deformation of the underground continuous wall caused by early-stage precipitation and foundation pit exposure in the foundation pit earthwork excavation process, and can enhance the capability of resisting deformation of the underground continuous wall when the supporting strength is not formed so as to ensure the safety and stability of foundation pit engineering.
Description
Technical Field
The utility model relates to the technical field of foundation pit engineering building envelope, in particular to a novel multi-layer pre-inclined strut building envelope.
Background
In the foundation pit support structures of various areas in China, the traditional vertical pile support is one of the common support forms, but along with the acceleration of the construction process of cities, the construction requirements of foundation pit engineering are strict, the change of surrounding environment is increasingly complex, the economic benefit of the support structures of the traditional vertical piles is low, and the support effect is poor. The prior theoretical research shows that compared with a straight pile, the inclined pile has strong deformation resistance and good anti-overturning capability.
At present, inclined supports are used as an enclosure structure in the process of excavating foundation pit earthwork. In order to resist deformation and sedimentation of soil in the excavation process, a diagonal brace is usually applied to foundation pit engineering after the first layer of soil is excavated. The existing inclined support enclosure structure ensures the stability of the first layer of soil after excavation, but the supporting effect is obviously reduced when the second layer of soil is excavated to multiple layers of soil, and the bending degree of the underground diaphragm wall towards the inside of the foundation pit is still increased layer by layer.
Aiming at the problems, innovative design is urgently needed on the basis of the original diagonal bracing enclosure structure.
Disclosure of Invention
The utility model aims to provide a novel multi-layer pre-inclined support building envelope, which aims to solve at least one technical problem in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a novel envelope of multilayer pre-diagonal bracing, is including being located the inboard underground diaphragm wall of foundation ditch, fixing device has been buried underground diaphragm wall, install first prefabricated steel pipe diagonal bracing and second prefabricated steel pipe diagonal bracing on the fixing device respectively, connecting support is installed to the one end that fixing device was kept away from to first prefabricated steel pipe diagonal bracing and second prefabricated steel pipe diagonal bracing, the outside of underground diaphragm wall is provided with the stand stake, be provided with the soil layer between underground diaphragm wall and the stand stake, the soil layer includes first layer soil layer and second layer soil layer, first layer soil layer and second layer soil layer distribute in proper order from top to bottom in the foundation ditch, connecting support installs on the stand stake.
Preferably, a pipeline interface is arranged at one end, close to the fixing device, of the first prefabricated steel pipe diagonal brace, and a first butt joint end and a second butt joint end are respectively arranged at two ends of the first prefabricated steel pipe diagonal brace.
Preferably, the first prefabricated steel pipe diagonal bracing and the second prefabricated steel pipe diagonal bracing have the same structure, the first prefabricated steel pipe diagonal bracing and the second prefabricated steel pipe diagonal bracing are steel pipes, and an shotcrete pipeline is installed in the middle of the first prefabricated steel pipe diagonal bracing and the second prefabricated steel pipe diagonal bracing.
Preferably, the fixing device comprises a bevel sleeve and an upper steel plate, the bevel sleeve is arranged on the underground continuous wall at equal intervals, the inclination angle of the pipe orifice of the bevel sleeve is consistent with the erection angle of the first prefabricated steel pipe diagonal support and the second prefabricated steel pipe diagonal support respectively, the upper steel plate is welded at the joint of the bevel sleeve and the first prefabricated steel pipe diagonal support and the second prefabricated steel pipe diagonal support respectively, and the upper steel plate is provided with a connecting hole.
Preferably, the connecting support comprises a lower steel plate welded between the second butt joint end and the connecting support, and the lower steel plate is also provided with connecting holes.
Preferably, the first butt joint end is fixedly connected with the underground diaphragm wall through an upper steel plate and a bevel connection sleeve, and the second butt joint end is fixedly connected with the upright post pile through a lower steel plate and a connection support.
Compared with the prior art, the utility model has the beneficial effects that: the novel enclosure structure of the multilayer pre-diagonal bracing;
1. the novel enclosure structure of the multilayer pre-inclined strut is formed by adopting the underground diaphragm wall, the first pre-fabricated steel pipe inclined strut, the second pre-fabricated steel pipe inclined strut and the upright post pile, so that the bending deformation of the underground diaphragm wall caused by early-stage precipitation and exposure of the foundation pit in the process of excavating the earthwork of the foundation pit can be effectively resisted, and the deformation resistance capability of the underground diaphragm wall when the supporting strength is not formed is enhanced, so that the safety and stability of foundation pit engineering are ensured;
2. the deformation resistance of the underground diaphragm wall can be obviously enhanced, deformation caused by excavation of earthwork of the foundation pit is reduced, before the excavation, the inclined strut device is erected in a layered mode, the overall stability and safety of the enclosure structure can be effectively improved, all parts of the inclined strut device can be recycled, material consumption can be reduced, and manufacturing cost is reduced.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is a schematic view of the connection structure of the fixing device and the first prefabricated steel pipe diagonal bracing according to the utility model;
fig. 3 is a schematic view of the connection structure of the connection support and the first prefabricated steel pipe diagonal bracing according to the utility model.
In the figure: 1. underground continuous wall; 2. upright post piles; 3. a soil layer; 301. a first layer of earth surface; 302. a second soil layer; 4. a first prefabricated steel pipe diagonal bracing; 401. a first docking end; 402. a pipe interface; 403. a connection hole; 404. a second butt end; 5. a second prefabricated steel pipe diagonal bracing; 6. a fixing device; 601. a bevel sleeve; 602. an upper steel plate; 7. the connecting support is connected; 701. and a lower steel plate.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-3, the present utility model provides a technical solution: the utility model provides a novel envelope of multilayer pre-diagonal bracing, including being located the inboard underground diaphragm wall 1 of foundation ditch, buried fixing device 6 on the underground diaphragm wall 1, install first prefabricated steel pipe diagonal bracing 4 and second prefabricated steel pipe diagonal bracing 5 on the fixing device 6 respectively, connecting support 7 is installed to the one end that fixing device 6 was kept away from to first prefabricated steel pipe diagonal bracing 4 and second prefabricated steel pipe diagonal bracing 5, the outside of underground diaphragm wall 1 is provided with upright post 2, be provided with soil layer 3 between underground diaphragm wall 1 and the upright post 2, soil layer 3 includes first layer soil surface layer 301 and second layer soil surface layer 302, first layer soil surface layer 301 and second layer soil surface layer 302 distribute in proper order from top to bottom in the foundation ditch, connecting support 7 installs on upright post 2.
The pipeline interface 402 has been seted up to the one end that the first prefabricated steel pipe bracing 4 is close to fixing device 6, the both ends of first prefabricated steel pipe bracing 4 are provided with first butt joint end 401 and second butt joint end 404 respectively, first prefabricated steel pipe bracing 4 can be through first butt joint end 401 and second butt joint end 404 respectively with fixing device 6 and connection support 7 interconnect, pipeline interface 402 that sets up on the first prefabricated steel pipe bracing 4 is used for being connected with the shotcrete pipeline, thereby can utilize high-pressure shotcrete, consolidate the both ends of first prefabricated steel pipe bracing 4 respectively.
The first prefabricated steel pipe diagonal bracing 4 and the second prefabricated steel pipe diagonal bracing 5 are identical in structure, the first prefabricated steel pipe diagonal bracing 4 and the second prefabricated steel pipe diagonal bracing 5 are steel pipes, an shotcrete pipeline is installed in the middle of the first prefabricated steel pipe diagonal bracing 4 and the second prefabricated steel pipe diagonal bracing 5, and the structure enclosure support stability can be improved through the arrangement of the first prefabricated steel pipe diagonal bracing 4 and the second prefabricated steel pipe diagonal bracing 5.
The fixing device 6 comprises a bevel connection sleeve 601 and an upper steel plate 602, the bevel connection sleeve 601 is arranged on the underground diaphragm wall 1 at equal intervals, the inclination angle of the pipe orifice of the bevel connection sleeve 601 is consistent with the erection angle of the first prefabricated steel pipe diagonal support 4 and the second prefabricated steel pipe diagonal support 5, the upper steel plate 602 is welded at the joint of the bevel connection sleeve 601 and the first prefabricated steel pipe diagonal support 4 and the second prefabricated steel pipe diagonal support 5, the upper steel plate 602 is provided with a connecting hole 403, the first prefabricated steel pipe diagonal support 4 and the second prefabricated steel pipe diagonal support 5 can be stably connected with the fixing device 6 through the connecting hole 403 and the upper steel plate 602, and finally the fixing device is convenient to fixedly connect with the underground diaphragm wall 1.
The connection support 7 comprises a lower steel plate 701, the lower steel plate 701 is welded between the second butt joint end 404 and the connection support 7, the lower steel plate 701 is also provided with a connection hole 403, and the arrangement of the lower steel plate 701 is beneficial to stable connection between the connection support 7 and the first prefabricated steel pipe diagonal brace 4.
The first butt joint end 401 is fixedly connected with the underground diaphragm wall 1 through the upper steel plate 602 and the bevel connection sleeve 601, the second butt joint end 404 is fixedly connected with the upright post 2 through the lower steel plate 701 and the connecting support 7, and the stability of connection between the first butt joint end 401 and the second butt joint end 404 and the underground diaphragm wall 1 and the upright post 2 is improved.
Working principle: as shown in fig. 1 to 3, when the novel enclosure structure with the multilayer pre-diagonal braces is used, the novel enclosure structure is used according to the following steps:
step 1: constructing the underground continuous wall 1 at a preset position in the building red line range of the foundation pit according to a preset construction process;
step 2, after the underground diaphragm wall 1 is constructed and reaches the strength required by design, constructing the upright post piles 2, and arranging connecting supports 7 on the upright post piles 2 at intervals;
step 3: after the strength of the pile body of the upright post pile 2 meets the design requirement, fixing the first fixing device 6 on the underground diaphragm wall 1 according to the excavation position of the first layer of soil body 301;
step 4: after the construction of the first fixing device 6 is finished, erecting the first prefabricated steel pipe diagonal bracing 4 between the corresponding fixing device 6 and the connecting support 7, respectively inserting a first butt joint end 401 and a second butt joint end 404 on the first prefabricated steel pipe diagonal bracing 4 into the corresponding fixing device 6 and the connecting support 7 through connecting holes 403, and immediately performing high-pressure concrete spraying on the two ends of the first prefabricated steel pipe diagonal bracing 4 after the first prefabricated steel pipe diagonal bracing is installed at a set position to strengthen the first prefabricated steel pipe diagonal bracing;
step 5: after the concrete is sprayed and the strength required by the design is reached, excavating a second layer of soil body 302 along the depth direction of the foundation pit, stopping until the preset depth is reached, and erecting a second prefabricated steel pipe diagonal brace 5 according to the arrangement mode of the first prefabricated steel pipe diagonal brace 4;
step 6: after the strength of the second prefabricated steel pipe diagonal bracing 5 is formed, dismantling and recycling the first prefabricated steel pipe diagonal bracing 4 according to the construction scheme requirement;
step 7: according to the soil excavation position of the third layer, the second fixing device 6 is fixed on the underground diaphragm wall 1 at intervals;
step 8: repeating the step 4 to erect a second prefabricated steel pipe diagonal bracing 5, continuously excavating a third layer of soil body, stopping until the preset depth is reached, and pouring a third support;
step 9: after the third supporting strength is formed, dismantling and recycling the second prefabricated steel pipe diagonal bracing 5 according to the construction scheme requirement;
step 10: the ith-1 th fixing device is fixed on the underground diaphragm wall at intervals according to the excavation position of the ith soil body;
step 11: repeating the step 4 to erect an ith-1 inclined strut, continuously excavating an ith layer of soil body, stopping until the preset depth is reached, and pouring the ith inclined strut;
step 12: after the i-th channel supporting strength is formed, dismantling and recovering the i-1-th channel diagonal bracing device according to the construction scheme requirement;
step 13: and (3) repeating the steps 3 to 6 repeatedly, and continuously excavating the soil body of the next layer until the foundation pit construction is completed.
Although the present utility model has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present utility model.
Claims (6)
1. The utility model provides a novel envelope of multilayer pre-diagonal brace which characterized in that: including being located underground diaphragm wall (1) of foundation ditch inboard, underground diaphragm wall (1) is last to have buried fixing device (6), install first prefabricated steel pipe bracing (4) and second prefabricated steel pipe bracing (5) on fixing device (6) respectively, connecting support (7) are installed to one end that fixing device (6) was kept away from to first prefabricated steel pipe bracing (4) and second prefabricated steel pipe bracing (5), the outside of underground diaphragm wall (1) is provided with stand stake (2), be provided with soil layer (3) between underground diaphragm wall (1) and stand stake (2), soil layer (3) are including first layer soil surface layer (301) and second layer soil surface layer (302), first layer soil surface layer (301) and second layer soil surface layer (302) distribute in proper order from top to bottom in the foundation ditch, connecting support (7) are installed on stand stake (2).
2. The novel enclosure of claim 1, wherein: pipeline interface (402) has been seted up to the one end that is close to fixing device (6) of first prefabricated steel pipe bracing (4), the both ends of first prefabricated steel pipe bracing (4) are provided with first butt joint end (401) and second butt joint end (404) respectively.
3. The novel enclosure of claim 1, wherein: the structure of the first prefabricated steel pipe diagonal bracing (4) is the same as that of the second prefabricated steel pipe diagonal bracing (5), the first prefabricated steel pipe diagonal bracing (4) and the second prefabricated steel pipe diagonal bracing (5) are steel pipes, and a sprayed concrete pipeline is arranged between the first prefabricated steel pipe diagonal bracing (4) and the second prefabricated steel pipe diagonal bracing (5).
4. The novel enclosure of claim 1, wherein: fixing device (6) are including bevel connection sleeve pipe (601) and upper portion steel sheet (602), equidistant setting of bevel connection sleeve pipe (601) is on underground diaphragm wall (1), and the mouth of pipe inclination of bevel connection sleeve pipe (601) is unanimous with the angle of erection of first prefabricated steel pipe bracing (4) and second prefabricated steel pipe bracing (5) respectively, bevel connection sleeve pipe (601) weld with the junction of first prefabricated steel pipe bracing (4) and second prefabricated steel pipe bracing (5) respectively has upper portion steel sheet (602), connecting hole (403) have been seted up on upper portion steel sheet (602).
5. The novel enclosure of claim 1, wherein: the connecting support (7) comprises a lower steel plate (701), the lower steel plate (701) is welded between the second butt joint end (404) and the connecting support (7), and the lower steel plate (701) is also provided with a connecting hole (403).
6. The novel enclosure of claim 2, wherein: the first butt joint end (401) is fixedly connected with the underground diaphragm wall (1) through an upper steel plate (602) and a bevel connection sleeve (601), and the second butt joint end (404) is fixedly connected with the upright post pile (2) through a lower steel plate (701) and a connection support (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322161535.4U CN220768086U (en) | 2023-08-11 | 2023-08-11 | Novel enclosure structure of multilayer pre-diagonal bracing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322161535.4U CN220768086U (en) | 2023-08-11 | 2023-08-11 | Novel enclosure structure of multilayer pre-diagonal bracing |
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| Publication Number | Publication Date |
|---|---|
| CN220768086U true CN220768086U (en) | 2024-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322161535.4U Active CN220768086U (en) | 2023-08-11 | 2023-08-11 | Novel enclosure structure of multilayer pre-diagonal bracing |
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| Country | Link |
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| CN (1) | CN220768086U (en) |
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2023
- 2023-08-11 CN CN202322161535.4U patent/CN220768086U/en active Active
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