CN220132921U - Soft soil geology foundation ditch supporting construction - Google Patents
Soft soil geology foundation ditch supporting construction Download PDFInfo
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- CN220132921U CN220132921U CN202321239715.3U CN202321239715U CN220132921U CN 220132921 U CN220132921 U CN 220132921U CN 202321239715 U CN202321239715 U CN 202321239715U CN 220132921 U CN220132921 U CN 220132921U
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- 239000002689 soil Substances 0.000 title claims abstract description 34
- 238000010276 construction Methods 0.000 title claims abstract description 13
- 239000004567 concrete Substances 0.000 claims abstract description 19
- 239000000758 substrate Substances 0.000 claims abstract description 18
- 230000002787 reinforcement Effects 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 35
- 239000010959 steel Substances 0.000 claims description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 3
- 238000009412 basement excavation Methods 0.000 abstract description 10
- 230000003014 reinforcing effect Effects 0.000 abstract description 8
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 239000004568 cement Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
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- Piles And Underground Anchors (AREA)
Abstract
The utility model relates to the technical field of foundation pit support, and discloses a soft soil geological foundation pit support structure, wherein a plurality of groups of filling piles (6) are arranged at the joint of each grade of slope (2) and the ground (1) or a platform (5) or a substrate (3), the tops of a plurality of groups of filling piles (6) positioned on the same section are sequentially connected with a zipper structure (7), and anchor rods (8) are arranged between two groups of filling piles (6) positioned on the section of the same grade of slope (2) so as to form a stable triangular configuration; a reinforcing mesh (9) is paved on the zipper structure (7), and concrete is poured for reinforcement; the supporting structure is suitable for soft soil geology, combines the traditional slope-releasing excavation and filling pile process, effectively reduces the cost of foundation pit supporting construction, and has low maintenance cost.
Description
Technical Field
The utility model relates to the technical field of foundation pit support, in particular to a soft soil geological foundation pit support structure.
Background
The foundation pit support is used for ensuring the safety of underground structure construction and the surrounding environment of the foundation pit, and is used for supporting, reinforcing and protecting the side wall of the foundation pit and the surrounding environment. The foundation pit support forms include slope excavation, soil nailing wall (composite soil nailing wall), soil-cement gravity retaining wall, steel reinforced cement soil stirring wall (SMW construction method), row piles, ground wall and the like. The coastal areas of China are relatively poor in land resources, available land resources are less and less, development of underground space is more favored for increasing urban living space, while coastal areas are mostly soft soil, foundation pits are excavated under the conditions of soft soil, high groundwater level and other complex fields, soil body slippage, foundation pit instability, pile body deflection, pit bottom uplift, serious water leakage of a supporting structure, damage caused by soil flowing and the like are easily generated, and great threat is caused to safety of surrounding buildings, underground structures and pipelines. Soft foundation pit support has become a hot spot and difficulty in current foundation engineering.
Chinese patent publication No. CN207436069U discloses a deep foundation pit supporting construction, including the foundation ditch with set up the anchor wall in the foundation ditch side slope, be equipped with a plurality of stock in the foundation ditch, the one end anchor of stock oblique insertion foundation ditch side slope is in the anchor wall, the stock includes the stock body, the detachable connection has the stock sleeve pipe on the stock body, the stock body is hollow tube, be equipped with a plurality of branch that distribute and be located the stock sleeve pipe along circumference on the lateral wall of stock body, branch and stock body fixed connection. And an anchor rod tip is fixedly connected to one end of the anchor rod body, which is far away from the foundation pit slope, and the anchor rod tip is arranged in a cone shape. In the supporting structure, the anchor rod tip of the anchor rod is inserted into the anchor wall to be anchored with the anchor wall, and the external threads are arranged on the anchor rod tip to increase the friction force between the anchor rod tip and the anchor wall, but the anchor between the anchor rod tip and the anchor wall is still unstable, and further design improvement is needed.
The inventor applies for a slope support structure of Chinese patent publication No. CN210031841U later, and the slope support structure is expanded and anchored with the anchor wall after penetrating through the anchor wall by arranging the anchor assembly, so that the anchoring stability between the anchor rod and the anchor wall is ensured, and the slope support structure can support the slope more stably. However, under the same condition, the construction cost of the support form is sequentially from low to high: the slope excavation is less than the soil nailing wall (composite soil nailing wall), the cement soil gravity retaining wall is less than the section steel cement soil stirring wall (SMW construction method), and the row piles are less than the ground wall, so that the construction cost of the anchor wall is higher, and the maintenance cost is higher. The inventors further studied the low cost form of support suitable for soft soil geology.
Disclosure of Invention
Aiming at the defects existing in the prior art, the utility model aims to provide a soft soil geological foundation pit supporting structure which is suitable for soft soil geology, and combines the traditional slope excavation and filling pile process, so that the cost of foundation pit supporting construction is effectively reduced, and the maintenance cost is also very low.
In order to achieve the above object, the present utility model provides the following technical solutions:
the foundation pit supporting structure comprises a ground, a slope, a substrate and a foundation pit, wherein the substrate is arranged around the foundation pit, the slope is connected with the ground and the substrate, the slope comprises at least one grade of slope, a platform is arranged between two adjacent grades of slopes, a plurality of groups of filling piles are arranged at the joint of each grade of slope and the ground or the platform or the substrate, the tops of the groups of filling piles positioned on the same section are sequentially connected with a zipper structure, and anchor rods are arranged between the two groups of filling piles positioned on the same grade of slope section so as to form a stable triangular configuration; and a reinforcing steel bar net is paved on the zipper structure, and concrete is poured for reinforcement.
Preferably, the cast-in-place pile comprises an outer cast-in-place pile and an inner cast-in-place pile, the outer cast-in-place pile comprises a steel bar net barrel, the inner cast-in-place pile comprises a hollow steel pipe positioned in the steel bar net barrel, concrete is poured between the steel bar net barrel and the hollow steel pipe, and the hollow steel pipe is also used as a water permeable hole.
Preferably, a depth fixing rod is arranged in the hollow steel pipe, and the depth of the depth fixing rod is equal to or more than the depth of the external cast-in-place pile, so that the depth of the cast-in-place pile is ensured.
Preferably, the zipper structure comprises a draw hook piece positioned on the ground or a platform or a substrate and a lock hook piece positioned on the slope, wherein the draw hook piece comprises a horizontal pipe section and a draw hook which is positioned at one end of the horizontal pipe section and is C-shaped, and both ends of the lock hook piece are respectively provided with a U-shaped pipe which is arranged in the draw hook so as to be fastened by mutual zipper.
Preferably, the horizontal pipe section is provided with a positioning hole, and the depth fixing rod penetrates through the positioning hole so as to prevent the zipper structure from being deviated.
Preferably, the reinforcing mesh at the same slope or ground or platform or substrate is fixed with the hook members or the hook members of the corresponding areas respectively through steel wires or binding belts, so that the stability of the supporting structure is further improved.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model is suitable for soft soil geology, combines the traditional slope-releasing excavation and filling pile technology, forms a triangular stable structure at the slope surface through the zipper structure and the anchor rod, lays a reinforcing mesh on the zipper structure and pours concrete for reinforcement, effectively reduces the construction cost of foundation pit support, and has low maintenance cost.
Drawings
Fig. 1 is a schematic structural diagram of conventional foundation pit supporting slope excavation.
Fig. 2 is a schematic structural diagram of the foundation pit supporting structure.
Fig. 3 is a schematic view of a partial structure of the foundation pit supporting structure.
Fig. 4 is a schematic structural view of a zipper structure in the foundation pit supporting structure.
In the accompanying drawings: 1-ground, 2-slope, 3-substrate, 4-foundation pit, 5-platform, 6-filling pile, 61-steel bar net barrel, 62-hollow steel pipe, 63-depth fixing rod, 7-zip structure, 71-draw hook piece, 711-horizontal pipe section, 7111-locating hole, 712-draw hook, 72-lock hook piece, 721-U-shaped pipe, 8-anchor rod, 9-steel bar net, 10-permeable well.
Detailed Description
Example 1: the utility model provides a soft soil geological foundation pit supporting structure, which comprises a ground 1, a slope 2, a substrate 3 and a foundation pit 4, wherein the substrate 3 is arranged around the foundation pit 4, the slope 2 is connected with the ground 1 and the substrate 3, the slope 2 comprises at least one grade of slope 2, and a platform 5 is arranged between two adjacent grades of slopes 2, and the soft soil geological foundation pit supporting structure is characterized in that a plurality of groups of filling piles 6 are arranged at the joint of each grade of slope 2 and the ground 1 or the platform 5 or the substrate 3, the tops of the groups of filling piles 6 positioned at the same section are sequentially connected with a zipper structure 7, and anchor rods 8 are arranged between the two groups of filling piles 6 positioned at the section of the same grade of slope 2 so as to form a triangular stable configuration; and the zipper structure 7 is paved with a reinforcing mesh 9, and concrete is poured for reinforcement.
The cast-in-place pile 6 comprises an outer cast-in-place pile and an inner cast-in-place pile, the outer cast-in-place pile comprises a steel bar net barrel 61, the inner cast-in-place pile comprises a hollow steel pipe 62 positioned in the steel bar net barrel 61, and concrete is poured between the steel bar net barrel 61 and the hollow steel pipe 62.
The conventional foundation pit supporting slope-releasing excavation mode is shown in fig. 1, is mainly suitable for areas with better soil conditions, and is preferably selected from natural slopes, so that the method is not suitable for soft soil areas. But the cost is low, the object is not protected, and the field is open. Meanwhile, if the excavation surface is below the ground water level in the traditional foundation pit supporting slope-releasing excavation mode, well point dewatering measures such as a permeable well 10 are adopted at the slope top and the platform, so that the stability of the slope body is improved; the water retaining ridge or the drainage ditch is arranged at the top of the slope to prevent water accumulated outside the pit from flowing into the pit and corroding the slope body.
The technology combines the traditional slope-releasing excavation and filling pile 6 technology, forms a triangular stable structure at the slope through the zipper structure 7 and the anchor rod 8, lays the reinforcing mesh 9 on the zipper structure and concretes to strengthen, effectively reduces the construction cost of foundation pit support, and has low maintenance cost.
Meanwhile, the hollow steel pipe 62 is designed to be used as a water permeable hole, well-point precipitation measures are not needed to be taken additionally, the effects of preventing water from flowing into a pit from flowing out of the pit, corroding a slope body and the like are met, and the manufacturing cost can be further reduced.
Example 2: the present utility model provides a soft soil geological foundation pit supporting structure, which is different from the above embodiments only in that:
the zipper structure 7 comprises a draw hook member 71 positioned on the ground 1 or the platform 5 or the substrate 3 and a lock hook member 72 positioned on the slope 2, the draw hook member 71 comprises a horizontal pipe section 711 and a draw hook 712 positioned at least at one end of the horizontal pipe section 711 and having a C shape, both ends of the lock hook member 72 are provided with U-shaped pipes 721, and the U-shaped pipes 721 are arranged in the draw hook 712 to be fastened by mutual zipper. The horizontal pipe section 711 is provided with a positioning hole 7111, and the depth fixing rod 63 penetrates through the positioning hole 7111 to prevent the zipper structure 7 from being deviated.
Example 3: the present utility model provides a soft soil geological foundation pit supporting structure, which is different from the above embodiments only in that: the hollow steel pipe 62 is internally provided with a depth fixing rod 63, and the depth of the depth fixing rod is 1.2-2 times of that of the external cast-in-place pile so as to ensure the depth of the cast-in-place pile 6.
Example 4: the present utility model provides a soft soil geological foundation pit supporting structure, which is different from the above embodiments only in that: the reinforcing mesh 9 positioned on the same slope 2 or the ground 1 or the platform 5 or the substrate 3 is respectively fixed with the hook members 71 or the hook members 72 in the corresponding areas through steel wires or binding belts, so that the stability of the supporting structure is further improved.
The soft soil geological foundation pit supporting method comprises the following steps:
s1, determining the depth and geological conditions of a foundation pit 4, determining the number of stages, gradient, width of a platform 5, number and depth of cast-in-place piles 6 of a slope surface 2 according to the depth of the foundation pit 4 and the height of a ground 1, drilling holes on the ground 1, the platform 5 and a substrate 3, lowering a steel bar net barrel 61 and a hollow steel tube 62 positioned in the steel bar net barrel 61, starting to cast concrete at a position 5-10cm below a horizontal plane to form the cast-in-place piles 6, and trimming the hollow steel tube 62 upwards extending beyond the horizontal plane;
s2, digging a groove with the depth of 5-10cm between the adjacent cast-in-situ piles 6, putting a draw hook piece 71 positioned on the ground 1 or the platform 5 or the substrate 3 and a lock hook piece 72 positioned on the slope 2, and mutually locking the draw hook piece 71 and the lock hook piece 72 and penetrating through the hollow steel pipe 62;
s3, inserting an anchor rod 8 from the top of the filling pile 6 positioned on the slope surface 2 at the same level and positioned at the slope bottom to the bottom of the filling pile 6 positioned at the slope top, and inserting the tip of the anchor rod 8 into the filling pile 6 to form a triangular stable configuration;
s4, paving a reinforcing mesh 9, reserving water permeable holes on the slope surface 2, and pouring concrete.
In step S1, the hollow steel pipe 62 is perforated with a depth-fixing rod 63, and the depth of the depth-fixing rod 63 is 1.2-2 times of the depth of the external cast-in-place pile.
In step S2, a positioning hole 7111 is formed in the horizontal pipe section 711 of the hook member 71, and the depth fixing rod 63 penetrates through the positioning hole 7111 to prevent the zipper structure 7 from being deviated.
In step S4, the reinforcement mesh 9 is fixed to the hook member 71 or the hook member 72 in the corresponding region by a wire or a band.
Claims (6)
1. The utility model provides a weak soil geology foundation ditch supporting construction, includes ground (1), domatic (2), basement (3) and foundation ditch (4), foundation ditch (3) encircle foundation ditch (4) setting, domatic (2) connect ground (1) and basement (3), domatic (2) are including at least one-level domatic (2), be equipped with platform (5) between adjacent two-level domatic (2), a plurality of groups bored concrete pile (6) are provided with in the junction of each level domatic (2) and ground (1) or platform (5) or basement (3), are located multiunit bored concrete pile (6) top of same cross-section and have connected gradually zip structure (7), are equipped with stock (8) between two groups bored concrete pile (6) of same level domatic (2) cross-section to form the stable configuration of triangle; and a reinforcing steel mesh (9) is paved on the zipper structure (7), and concrete is poured for reinforcement.
2. A soft soil geological foundation pit supporting structure according to claim 1, wherein said bored concrete pile (6) comprises an outer bored concrete pile and an inner bored concrete pile, the outer bored concrete pile comprises a steel bar net drum (61), the inner bored concrete pile comprises a hollow steel tube (62) positioned in the steel bar net drum (61), concrete is poured between the steel bar net drum (61) and the hollow steel tube (62), and said hollow steel tube (62) also serves as a water permeable hole.
3. A soft soil geological foundation pit supporting structure according to claim 2, wherein a depth fixing rod (63) is arranged in the hollow steel pipe (62), and the depth of the depth fixing rod is 1.2-2 times that of the external cast-in-place pile so as to ensure the depth of the cast-in-place pile (6).
4. A soft soil geological foundation pit supporting structure according to claim 3, wherein the zipper structure (7) comprises a draw hook member (71) positioned on the ground (1) or the platform (5) or the substrate (3) and a hook member (72) positioned on the slope (2), the draw hook member (71) comprises a horizontal pipe section (711) and a draw hook (712) which is positioned at one end of the horizontal pipe section (711) and is in a C shape, both ends of the hook member (72) are provided with U-shaped pipes (721), and the U-shaped pipes (721) are positioned in the draw hook (712) to be fastened by mutual zipper.
5. A soft soil geological foundation pit supporting structure according to claim 4, wherein said horizontal pipe section (711) is provided with a positioning hole (7111), and said depth fixing rod (63) penetrates said positioning hole (7111) to prevent the zipper structure (7) from being deviated.
6. The soft soil geological foundation pit supporting structure according to claim 4, wherein the reinforcing steel bar meshes (9) positioned on the same slope (2) or ground (1) or platform (5) or substrate (3) are respectively fixed with the hook members (71) or the hook members (72) of the corresponding areas through steel wires or binding belts, so that the stability of the supporting structure is further improved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321239715.3U CN220132921U (en) | 2023-05-22 | 2023-05-22 | Soft soil geology foundation ditch supporting construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321239715.3U CN220132921U (en) | 2023-05-22 | 2023-05-22 | Soft soil geology foundation ditch supporting construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220132921U true CN220132921U (en) | 2023-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321239715.3U Active CN220132921U (en) | 2023-05-22 | 2023-05-22 | Soft soil geology foundation ditch supporting construction |
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| Country | Link |
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| CN (1) | CN220132921U (en) |
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2023
- 2023-05-22 CN CN202321239715.3U patent/CN220132921U/en active Active
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