CN221276626U - Foundation pit engineering oblique throwing supporting device convenient for earth excavation - Google Patents
Foundation pit engineering oblique throwing supporting device convenient for earth excavation Download PDFInfo
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- CN221276626U CN221276626U CN202322914220.2U CN202322914220U CN221276626U CN 221276626 U CN221276626 U CN 221276626U CN 202322914220 U CN202322914220 U CN 202322914220U CN 221276626 U CN221276626 U CN 221276626U
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- 238000009412 basement excavation Methods 0.000 title claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 38
- 239000010959 steel Substances 0.000 claims abstract description 38
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 9
- 239000002689 soil Substances 0.000 claims description 11
- 238000010276 construction Methods 0.000 claims description 10
- 239000002002 slurry Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 6
- 238000011065 in-situ storage Methods 0.000 abstract 3
- 230000002787 reinforcement Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000008569 process Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
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- Piles And Underground Anchors (AREA)
Abstract
The utility model discloses a foundation pit engineering inclined throwing support device convenient for earth excavation, which comprises: the high-pressure jet grouting pile comprises a first cast-in-situ bored pile, a second cast-in-situ bored pile, a cast-in-situ bored pile guard pile, a first crown beam, a second crown beam, a first bracket, a second bracket, force transmission profile steel, a reinforcing body of the high-pressure jet grouting pile between piles and a rubber buffer layer. The inclined throwing support device adopts double-row bored piles in the pit to balance the horizontal force transmitted by the force transmission steel, and the high-pressure jet grouting pile reinforcement among piles can greatly improve the horizontal resistance of the double-row piles, and has the characteristics of convenient earth excavation, good bottom plate integrity and no influence on uniform settlement of the bottom plate.
Description
Technical Field
The utility model relates to the field of foundation pit engineering, in particular to an inclined-polishing supporting soil blocking structure.
Background
Along with the acceleration of the urban process in China, the development and utilization of underground space are rapidly developed, foundation pit engineering is more and more common, and foundation pit support design principles and construction processes are continuously developed. The foundation pit supporting structure is a temporary supporting structure and bears the action of resisting the water and soil pressure outside the pit from the earth excavation to the stage before the backfilling of the fertilizer groove between the basement outer wall and the bored pile guard pile. The inclined throwing support is used for excavating a layer of basement foundation pit engineering with larger area, the inclined throwing support arranged on the bottom plate is used for providing horizontal resistance force for the guard pile, so that the internal force of the guard pile is reduced, and the horizontal deformation of the guard pile is effectively controlled. However, the conventional inclined throwing support (force transmission steel or steel pipe) is arranged on the bracket of the bottom plate, and the horizontal force transmitted by the inclined throwing support is balanced through the bottom plate, so that the following two main problems exist: (1) Constructing the bottom plate at least twice, namely constructing the bottom plate outside the basin side soil-retaining area (basin center) and the bracket on the side, and excavating basin side soil to expose the basin side bottom plate area after the bottom plate and the bracket reach 70% of design strength and the erection of the oblique throwing support (force transmission steel or steel pipe) is completed, wherein a construction joint exists between the basin side bottom plate and the basin center bottom plate, so that a water seepage channel is easy to form; (2) When the earthwork of the basin side soil-retaining area is excavated, the bottom plate in the center of the basin is constructed completely, the condition of traveling an earthwork vehicle in a foundation pit is not provided, for the foundation pit engineering with larger pit side space, the earthwork of the basin side soil-retaining area can be excavated and transported by an excavator and an earthwork vehicle standing on the top of the foundation pit, but the lateral load born by a bored pile guard pile can be increased by the dynamic load of the excavator and the earthwork vehicle, so that the safety of the foundation pit is endangered; for pit engineering with narrow pit edge space, the soil reserved on the pit edge can only be transported horizontally and vertically through the tower crane, so that the transportation efficiency is low and the construction period is long.
The two main problems have seriously affected the application of the inclined throwing support in large-area foundation pit engineering. Many large-area one-layer basement foundation pit projects are forced to adopt large-area horizontal opposite bracing, and the manufacturing cost, construction period and cost are greatly increased. Today, which advocates high quality development and green development, how to solve the two main problems affecting the large-area application of the diagonal-cast support has become a desire of practitioners.
Disclosure of utility model
Aiming at two problems in the prior art, the utility model provides the foundation pit engineering inclined throwing and supporting device convenient for earthwork excavation, which not only meets the requirements of rapid construction of earthwork excavation and transportation of a basin side soil-retaining area in a pit, but also meets the requirements of integral pouring of earthwork of the basin side area and a basin center area and avoiding leakage of groundwater.
In order to achieve the technical purpose, the utility model adopts the following technical scheme: a foundation pit engineering inclined throwing and supporting device convenient for earthwork excavation comprises a first bored pile, a second bored pile, a bored pile guard pile, a first crown beam, a second crown beam, a first bracket, a second bracket, force transmission profile steel, a reinforcing body of a high-pressure jet grouting pile among piles and a rubber buffer layer; the method comprises the steps that a bored pile guard pile, a first bored pile and a second bored pile are respectively arranged in a construction foundation, a pile-to-pile high-pressure jet grouting pile reinforcing body is arranged between the first bored pile and the second bored pile, slurry at the pile part of the bored pile guard pile is broken and longitudinal ribs are exposed, a first crown beam and a first bracket are bound, slurry at the upper part of the first bored pile is broken and longitudinal ribs are exposed, a second crown beam and a second bracket are bound, and force transmission steel is erected between the first bracket and the second bracket; and a rubber buffer layer is arranged at the upper end of the second crown beam.
Further, the floating paste at the upper part of the second bored pile is broken, the longitudinal ribs are exposed, and the third crown beam is bound.
Further, a tie plate is disposed between the second crown bar and the third crown bar.
Further, the force transmission section steel passes through the bottom plate and is welded with a water stop steel plate.
Further, a first bracket embedded steel plate is arranged on the inclined plane of the second bracket.
Further, a second bracket embedded steel plate is arranged on the inclined plane of the first bracket.
Further, one side of the bored pile guard pile is provided with basin-side soil.
Further, the first bored pile and the second bored pile are arranged in parallel.
Further, a rubber buffer layer is provided on the upper end of the third crown Liang Hela tie plate.
Further, a rubber buffer layer is provided under the cushion layer.
Compared with the prior art, the foundation pit engineering inclined throwing support device convenient for earth excavation has the following beneficial effects:
The horizontal force transmitted by the force transmission section steel is borne by the reinforcing bodies of the first bored pile, the second crown beam, the third crown beam, the second bracket, the drawknot plate and the high-pressure jet grouting piles among the piles, so that the purposes of digging and transporting the basin-side soil in the pit are realized, the purposes of casting and avoiding leakage of the basin-side regional bottom plate and the basin-center bottom plate at one time are realized, the uniform settlement of the basement main structure bottom plate is not influenced, and better social and economic benefits are realized.
Drawings
Fig. 1 is a schematic diagram of a foundation pit engineering diagonal bracing device convenient for earth excavation.
Reference numerals illustrate:
1-a first bored pile; 2-a second bored pile; 3-a second crown bar; 4-a third crown beam; 5-a drawknot plate; 6-a second bracket; 7-force transmission section steel; 8-a water-stopping steel plate; 9-a first bracket; 10-a first crown bar; 11-a bored pile guard pile; 12-embedding a steel plate for the first bracket; 13, embedding a steel plate into the second bracket; 14, leaving soil at the basin edge; 15-reinforcing the high-pressure jet grouting piles among piles; 16-rubber buffer layer.
Detailed Description
The utility model will be further described in detail with reference to the drawings and detailed description which follow, for the purpose of clarity of understanding.
As shown in fig. 1, the foundation pit engineering inclined throwing and supporting device convenient for earthwork excavation comprises a first bored pile (1), a second bored pile (2), a bored pile guard pile (11), a first crown beam (10), a second crown beam (3), a first bracket (9), a second bracket (6), force transmission profile steel (7), an inter-pile high-pressure jet grouting pile reinforcing body (15) and a rubber buffer layer (16); the method comprises the steps of arranging a bored pile enclosure pile (11), a first bored pile (1) and a second bored pile (2) in a construction foundation respectively, arranging a pile-to-pile high-pressure jet grouting pile reinforcing body (15) between the first bored pile (1) and the second bored pile (2), breaking slurry at the part of the bored pile enclosure pile (11) and exposing longitudinal ribs, binding a first crown beam (10) and a first bracket (9), breaking slurry at the upper part of the first bored pile (1) and exposing longitudinal ribs, binding a second crown beam (3) and a second bracket (6), and erecting force transmission section steel (7) between the first bracket (9) and the second bracket (6); and a rubber buffer layer (16) is arranged at the upper end of the second crown beam (3). And (3) breaking the slurry at the upper part of the second bored pile (2) and exposing the longitudinal ribs, and binding a third crown beam (4). A drawknot plate (5) is arranged between the second crown beam (3) and the third crown beam (4). The force-transferring steel plate (8) is welded at the position where the force-transferring steel plate passes through the bottom plate. A first bracket embedded steel plate (12) is arranged on the inclined plane of the second bracket (6). A second bracket embedded steel plate (13) is arranged on the inclined plane of the first bracket (9). One side of the bored pile guard pile (11) is provided with basin-side soil (14). The first bored pile (1) and the second bored pile (2) are arranged in parallel. The rubber buffer layer (16) is also arranged at the upper end of the third crown Liang Hela knot plate (5). A rubber cushion layer (16) is provided below the cushion layer.
The foundation pit engineering inclined throwing and supporting device convenient for earth excavation has the following concrete construction procedures:
(1) And (3) constructing a bored pile guard pile (11), a first bored pile (1), a second bored pile (2) and a high-pressure jet grouting pile reinforcing body (15) among the piles on the ground.
(2) After the bored pile guard pile (11) reaches 70% of the design strength, shallow part slurry is broken and longitudinal ribs are exposed, the first crown beam (10) and the first bracket (9) steel bars are bound, the second steel plate (13) is embedded, and then concrete is poured.
(3) And excavating earthwork in the pit to the pit bottom after the first crown beam (10) and the first bracket (9) reach 80% of the design strength, and reserving soil (14) at the basin edge for back pressure.
(4) And (3) breaking the slurry on the upper parts of the first bored pile (1) and the second bored pile (2) and exposing longitudinal ribs, binding the second crown beam (3) and the third crown beam (4), the second bracket (6) and the drawknot plate (5) with steel bars, embedding the steel plates (12) of the first bracket, and then pouring concrete.
(5) After the crown beams (3, 4), corbels (6) and drawknot plates (5) of double rows of piles in the pit reach 80% of design strength, a force transmission section steel (7) is erected, and basin side soil (14) is excavated.
(6) And rubber buffer layers (16) are arranged on the second crown beam (3) and the third crown beam (4) of the double-row pile tops in the pit, the second bracket (6) and the drawknot plate (5), and the uniformity of long-term settlement of the bottom plate is coordinated.
(7) The construction cushion layer and the binding bottom plate steel bars are adopted, the water stop steel plates (8) are welded at the positions of the force transmission steel penetrating the bottom plate, and the bottom plate is concreted (poured to the edge of the bored pile fender pile).
(8) And cutting the force transmission section steel (7) above the bottom plate surface after the bottom plate concrete reaches 70% of the design strength.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (10)
1. The foundation pit engineering inclined throwing and supporting device is convenient for earthwork excavation and is characterized by comprising a first bored pile (1), a second bored pile (2), a bored pile guard pile (11), a first crown beam (10), a second crown beam (3), a first bracket (9), a second bracket (6), force transmission profile steel (7), an inter-pile high-pressure jet grouting pile reinforcing body (15) and a rubber buffer layer (16); the method comprises the steps of arranging a bored pile enclosure pile (11), a first bored pile (1) and a second bored pile (2) in a construction foundation respectively, arranging a pile-to-pile high-pressure jet grouting pile reinforcing body (15) between the first bored pile (1) and the second bored pile (2), breaking slurry at the part of the bored pile enclosure pile (11) and exposing longitudinal ribs, binding a first crown beam (10) and a first bracket (9), breaking slurry at the upper part of the first bored pile (1) and exposing longitudinal ribs, binding a second crown beam (3) and a second bracket (6), and erecting force transmission section steel (7) between the first bracket (9) and the second bracket (6); and a rubber buffer layer (16) is arranged at the upper end of the second crown beam (3).
2. The foundation pit engineering diagonal bracing device convenient for earth excavation according to claim 1, wherein: and (3) breaking the slurry at the upper part of the second bored pile (2) and exposing the longitudinal ribs, and binding a third crown beam (4).
3. The foundation pit engineering diagonal bracing device convenient for earth excavation according to claim 1, wherein: a drawknot plate (5) is arranged between the second crown beam (3) and the third crown beam (4).
4. The foundation pit engineering diagonal bracing device convenient for earth excavation according to claim 1, wherein: the force-transferring steel plate (8) is welded at the position where the force-transferring steel plate passes through the bottom plate.
5. The foundation pit engineering diagonal bracing device convenient for earth excavation according to claim 1, wherein: a first bracket embedded steel plate (12) is arranged on the inclined plane of the second bracket (6).
6. The foundation pit engineering diagonal bracing device convenient for earth excavation according to claim 1, wherein: a second bracket embedded steel plate (13) is arranged on the inclined plane of the first bracket (9).
7. The foundation pit engineering diagonal bracing device convenient for earth excavation according to claim 1, wherein: one side of the bored pile guard pile (11) is provided with basin-side soil (14).
8. The foundation pit engineering diagonal bracing device convenient for earth excavation according to claim 1, wherein: the first bored pile (1) and the second bored pile (2) are arranged in parallel.
9. A foundation pit engineering diagonal bracing device convenient for earth excavation according to claim 3, wherein: the rubber buffer layer (16) is arranged at the upper ends of the third crown beam (4) and the drawknot plate (5).
10. The foundation pit engineering diagonal bracing device convenient for earth excavation according to claim 9, wherein: a rubber cushion layer (16) is provided below the cushion layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322914220.2U CN221276626U (en) | 2023-10-30 | 2023-10-30 | Foundation pit engineering oblique throwing supporting device convenient for earth excavation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322914220.2U CN221276626U (en) | 2023-10-30 | 2023-10-30 | Foundation pit engineering oblique throwing supporting device convenient for earth excavation |
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| Publication Number | Publication Date |
|---|---|
| CN221276626U true CN221276626U (en) | 2024-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322914220.2U Active CN221276626U (en) | 2023-10-30 | 2023-10-30 | Foundation pit engineering oblique throwing supporting device convenient for earth excavation |
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| Country | Link |
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| CN (1) | CN221276626U (en) |
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2023
- 2023-10-30 CN CN202322914220.2U patent/CN221276626U/en active Active
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