CN212294676U - Foundation pit supporting structure - Google Patents
Foundation pit supporting structure Download PDFInfo
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- CN212294676U CN212294676U CN202020538802.9U CN202020538802U CN212294676U CN 212294676 U CN212294676 U CN 212294676U CN 202020538802 U CN202020538802 U CN 202020538802U CN 212294676 U CN212294676 U CN 212294676U
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Abstract
The embodiment of the application relates to the technical field of constructional engineering, in particular to a foundation pit supporting structure. The foundation pit supporting structure comprises a plurality of temporary piles, connecting beams and retaining walls; a plurality of temporary piles are embedded into soil on the outer side of the side piles in the vertical direction; along the vertical direction, the top of the temporary pile is higher than the top of the side pile, and the bottom of the temporary pile is lower than the top of the side pile; the connecting beam is positioned at the tops of the temporary piles and fixedly connects the temporary piles into a whole; equal fixedly connected with retaining wall between every two adjacent temporary piles, retaining wall are located the back of the body soil face of temporary pile. The foundation pit supporting structure has the characteristics of low manufacturing cost, safety, reliability, simplicity in implementation and recyclability, and can be used for construction through vertical excavation without slope excavation construction.
Description
Technical Field
The application relates to the technical field of constructional engineering, in particular to a foundation pit supporting structure.
Background
In open cut foundation pit engineering in urban areas, the surrounding environment is generally complex, dense underground pipelines, important buildings and municipal roads with higher grades are provided, and the adoption of the foundation pit supporting structure is particularly important. In the foundation pit engineering supported by the mechanical pore-forming cast-in-place pile, a crown beam is generally arranged at the pile top and is generally embedded below the ground; when the conventional crown beam is constructed, slope excavation needs to be carried out, but the slope excavation can affect peripheral pipelines, buildings and municipal roads; the construction of the crown beam is influenced by the influence of the surrounding environment and when the field is tense and does not have the slope-releasing excavation condition.
In order to protect the safety of underground pipelines and buildings and reduce the construction cost, a foundation pit supporting structure which can be constructed without slope relief is urgently needed.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a low in cost, safe and reliable, implement simple, can retrieve underground structure, adopts this underground structure to carry out the construction through vertical excavation, need not to put the slope excavation construction.
The embodiment of the application provides a foundation pit supporting structure which comprises a plurality of temporary piles, a connecting beam and a retaining wall; wherein:
the temporary piles are embedded into soil on the outer side of the side piles in the vertical direction; in the vertical direction, the top of the temporary pile is higher than the top of the side pile, and the bottom of the temporary pile is lower than the top of the side pile;
the connecting beam is positioned at the tops of the temporary piles and fixedly connects the temporary piles into a whole;
every two adjacent temporary piles are fixedly connected with retaining walls, and the retaining walls are located on the back soil surface of the temporary piles.
Preferably, the retaining wall is a reinforced concrete structure.
Preferably, the retaining wall comprises a steel mesh and a concrete layer which form an integral structure;
the reinforcing mesh is fixedly connected to the two adjacent temporary piles;
the concrete layer is formed by concrete sprayed and mixed on the reinforcing mesh.
Preferably, the reinforcing mesh is welded to the temporary pile.
Preferably, the retaining wall further includes a plurality of reinforcing bars disposed at intervals in an arrangement direction of the plurality of temporary piles.
Preferably, the bottom surface of the connection beam coincides with a construction ground in a vertical direction.
Preferably, the distance between the temporary piles is 0.3-0.8 m.
Preferably, the temporary pile is an I-shaped steel.
Preferably, the top of the temporary pile is provided with a hoisting hole.
Preferably, the diameter of the hoisting hole is 50 mm.
The foundation pit supporting structure provided in the embodiment of the application has the following beneficial effects:
the foundation pit supporting structure comprises a plurality of temporary piles embedded into soil mass outside the side piles, a connecting beam for fixedly connecting the temporary piles into a whole and a retaining wall fixedly connected between every two adjacent temporary piles; the temporary piles can be vertically arranged by adopting construction machinery, the retaining wall is gradually constructed along with excavation of a foundation pit, soil body support among the temporary piles can be effectively strengthened through the retaining wall, the temporary piles can be pulled out to be recycled after engineering is completed, and therefore the foundation pit supporting structure has the advantages of being good in implementation performance, simple in operation, safe, reliable, low in manufacturing cost, capable of being recycled and capable of saving resources, and construction can be carried out through vertical excavation by adopting the foundation pit supporting structure without slope excavation construction.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic structural diagram of a foundation pit supporting structure provided in an embodiment of the present application;
fig. 2 is a schematic structural view of positions of temporary piles and a crown beam of the foundation pit supporting structure provided in fig. 1;
fig. 3 is a schematic structural view of a temporary pile of the excavation supporting structure provided in fig. 1.
Reference numerals:
1-temporary piling; 2-a tie beam; 3-a retaining wall; 4-side piling; 5-a crown beam; 6-reinforcing steel bars; 7-constructing the ground; and 11-hoisting holes.
Detailed Description
In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The embodiment of the application provides a foundation pit supporting structure, as shown in the structures of fig. 1 and 2, the foundation pit supporting structure comprises a plurality of temporary piles 1, connecting beams 2 and retaining walls 3; wherein:
a plurality of temporary piles 1 are embedded into soil outside the side piles 4 in the vertical direction; the temporary pile 1 can be an I-shaped steel, and in the construction process, the temporary pile 1 can be directly embedded into the soil body outside the side pile 4 by adopting a construction machine through a vertical driving method; in the vertical direction, the top of the temporary pile 1 is higher than the top of the side pile 4, and the bottom of the temporary pile 1 is lower than the top of the side pile 4; fig. 2 simply illustrates the relative positions of the temporary pile 1, the side pile 4 and the crown beam 5, and it can be known from fig. 2 that the side pile 4 is buried underground, the top surface of the temporary pile 1 can be flush with the construction ground 7, the top of the temporary pile 1 is higher than the top of the side pile 4, the bottom of the temporary device is lower than the top of the side pile 4, the temporary pile 1 and the side pile 4 have an overlapping part in the vertical direction, and the length of the overlapping part can be set according to the actual conditions of the foundation pit and the periphery of the foundation pit; when the temporary pile 1 adopts the I-steel, the specific size and model of the I-steel can be determined according to the excavation depth of the crown beam 5;
the connecting beam 2 is positioned at the tops of the temporary piles 1 and fixedly connects the temporary piles 1 into a whole; as shown in the structures of fig. 1 and 2, a connecting beam 2 is arranged at the top of a temporary pile 1, and the connecting beam 2 is fixedly connected with the temporary pile 1 to fixedly connect a plurality of temporary piles 1 into an integral structure, so that a stable and reliable supporting structure is formed on the outer peripheries of a side pile 4 and a crown beam 5; when the temporary piles 1 are made of I-shaped steel, the connecting beams 2 can also be made of steel beams, and the connecting beams 2 and the temporary piles 1 can be connected and fixed in a welding mode;
a retaining wall 3 is fixedly connected between every two adjacent temporary piles 1, and the retaining wall 3 is positioned on the back soil surface of each temporary pile 1; as shown in the structure of fig. 1, a retaining wall 3 is arranged between adjacent temporary piles 1, the retaining wall 3 can support the soil outside the side piles 4 and can also structurally reinforce the temporary piles 1, an integral supporting structure is formed by the temporary piles 1, the connecting beams 2 and the retaining wall 3, and the soil outside the side piles 4 is supported, so that the excavation of a foundation pit and the construction of the crown beam 5 are facilitated.
The foundation pit supporting structure comprises a plurality of temporary piles 1 embedded into soil mass on the outer side of side piles 4, a connecting beam 2 for fixedly connecting the plurality of temporary piles 1 into a whole, and a retaining wall 3 fixedly connected between two adjacent temporary piles 1; the temporary pile 1 can be vertically constructed by adopting construction machinery according to a cantilever structure, auxiliary measures such as inner support and outer anchor rope pulling are not needed to be added, foundation pit excavation and construction of a crown beam 5 can be carried out under the protection of the temporary pile 1, the temporary pile 1 and the retaining wall 3 form the retaining wall 3 on the upper portion of the crown beam 5 together, the retaining wall 3 is gradually constructed along with the excavation of the foundation pit, soil body support among the temporary piles 1 can be effectively strengthened through the retaining wall 3, the temporary pile 1 can be pulled out to be recycled after the engineering is completed, therefore, the foundation pit supporting structure has the characteristics of good practicability, simplicity in operation, safety, reliability, low cost, recycling and resource saving, the foundation pit supporting structure can be constructed through vertical excavation, and slope excavation construction is not needed.
In the above-described foundation pit supporting structure, the retaining wall 3 may be a reinforced concrete structure, and the retaining wall 3 includes a reinforcing mesh (not shown) and a concrete layer (not shown) that form an integral structure; the reinforcing mesh is fixedly connected to the two adjacent temporary piles 1, and the reinforcing mesh can be directly welded and connected to the temporary piles 1; the concrete layer is formed by concrete sprayed and mixed on the steel bar net sheet; as shown in the structure of fig. 1, in order to further improve the structural strength and rigidity of the foundation pit supporting structure and further improve the safety of construction, the retaining wall 3 may further include a plurality of reinforcing bars 6 disposed at intervals in the arrangement direction of the plurality of temporary piles 1.
As shown in the structure of fig. 2, the bottom surface of the connection beam 2 coincides with the construction ground 7 in the vertical direction, that is, the temporary piles 1 are embedded in the soil body below the construction ground 7, the top surface of the temporary piles 1 may be flush with the construction ground 7, and the connection beam 2 is located above the construction ground 7. Because the bottom surface of the connecting beam 2 coincides with the construction ground 7, the construction can be carried out on the construction ground 7 in the process of constructing the connecting beam 2, and the construction of the connecting beam 2 is convenient.
As shown in the structure of fig. 1, the spacing L between the temporary piles 1 may be 0.3m to 0.8m, such as: 0.3m, 0.4m, 0.5m, 0.6m, 0.7m, 0.8 m. The distance L between the temporary piles 1 is 0.3-0.8 m, and the distance between the temporary piles 1 is smaller, so that the structural strength, the working stability and the reliability of the foundation pit supporting structure can be ensured.
As shown in the structure of fig. 3, a hoisting hole 11 is provided at the top of the temporary pile 1, the hoisting hole 11 may be a circular hole, and the diameter of the hoisting hole 11 may be 50 mm.
Because the hoisting hole 11 is formed in the top of the temporary pile 1, the temporary pile 1 can be conveniently hoisted through the hoisting hole 11 in the top, and after construction is finished, a lifting hook of construction machinery such as a crane can be adopted to penetrate through the hoisting hole 11 to pull out the temporary pile 1 driven into the ground, so that the temporary pile 1 can be repeatedly used in later construction without repeatedly preparing the temporary pile 1, resources are saved, and construction cost is reduced.
The construction process of the foundation pit supporting structure can be as follows: before excavation of a foundation pit and construction of a crown beam 5, a construction machine is adopted to vertically drive temporary piles 1 on the outer sides of side piles 4, and the distance between the temporary piles 1 can be controlled to be 0.3-0.8 m according to the stratum condition and the surrounding environment protection requirement; when the temporary pile 1 adopts I-steel, the type of the I-steel is determined according to the excavation depth of the crown beam 5; in order to strengthen the integrity of the foundation pit supporting structure, a connecting beam 2 is arranged at the top of the temporary pile 1, and the temporary pile 1 is connected into a whole through the connecting beam 2; the method comprises the following steps of (1) reliably welding reinforcing mesh sheets arranged on the back soil surface of a foundation pit supporting structure along with foundation pit excavation and temporary piles 1 in a vertical mode, spraying and mixing in time, strengthening soil body supporting measures among the temporary piles 1, and performing foundation pit excavation and crown beam 5 construction under the protection of the supporting structure of the temporary piles 1; in the later period, after the construction of the structure in the foundation pit is finished and the top beam 5 is chiseled off, the supporting structure of the temporary pile 1 can continuously play a role; after the project is completely finished, the temporary pile 1 can be recovered, the hoisting hole 11 is reserved in advance at the top of the temporary pile 1, and the temporary pile is pulled out through construction machinery.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A foundation pit supporting structure is characterized by comprising a plurality of temporary piles, connecting beams and retaining walls; wherein:
the temporary piles are embedded into soil on the outer side of the side piles in the vertical direction; in the vertical direction, the top of the temporary pile is higher than the top of the side pile, and the bottom of the temporary pile is lower than the top of the side pile;
the connecting beam is positioned at the tops of the temporary piles and fixedly connects the temporary piles into a whole;
every two adjacent temporary piles are fixedly connected with retaining walls, and the retaining walls are located on the back soil surface of the temporary piles.
2. The foundation pit supporting structure according to claim 1, wherein the retaining wall is a reinforced concrete structure.
3. The foundation pit supporting structure according to claim 2, wherein the retaining wall includes a reinforcing mesh sheet and a concrete layer forming an integral structure;
the reinforcing mesh is fixedly connected to the two adjacent temporary piles;
the concrete layer is formed by concrete sprayed and mixed on the reinforcing mesh.
4. The foundation pit supporting structure of claim 3, wherein the mesh of steel reinforcement is welded to the temporary pile.
5. The foundation pit supporting structure according to claim 4, wherein the retaining wall further includes a plurality of reinforcing bars provided at intervals in an arrangement direction of the plurality of temporary piles.
6. The foundation pit supporting structure according to claim 1, wherein a bottom surface of the connection beam coincides with a construction ground in a vertical direction.
7. The foundation pit supporting structure according to claim 1, wherein the distance between the temporary piles is 0.3 to 0.8 m.
8. The foundation pit supporting structure according to claim 1, wherein the temporary piles are i-beams.
9. The foundation pit supporting structure according to any one of claims 1 to 8, wherein a lifting hole is provided at a top of the provisional pile.
10. The foundation pit supporting structure according to claim 9, wherein the diameter of the hoisting hole is 50 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020538802.9U CN212294676U (en) | 2020-04-13 | 2020-04-13 | Foundation pit supporting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020538802.9U CN212294676U (en) | 2020-04-13 | 2020-04-13 | Foundation pit supporting structure |
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| Publication Number | Publication Date |
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| CN212294676U true CN212294676U (en) | 2021-01-05 |
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| CN202020538802.9U Active CN212294676U (en) | 2020-04-13 | 2020-04-13 | Foundation pit supporting structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113235613A (en) * | 2021-05-24 | 2021-08-10 | 中国铁路设计集团有限公司 | Newly-built foundation pit excavation supporting method using adjacent existing fender post |
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2020
- 2020-04-13 CN CN202020538802.9U patent/CN212294676U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113235613A (en) * | 2021-05-24 | 2021-08-10 | 中国铁路设计集团有限公司 | Newly-built foundation pit excavation supporting method using adjacent existing fender post |
| CN113235613B (en) * | 2021-05-24 | 2024-04-05 | 中国铁路设计集团有限公司 | Method for excavating and supporting newly-built foundation pit by utilizing adjacent existing guard piles |
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