CN114396052A - Foundation pit supporting and blocking structure - Google Patents
Foundation pit supporting and blocking structure Download PDFInfo
- Publication number
- CN114396052A CN114396052A CN202111662318.2A CN202111662318A CN114396052A CN 114396052 A CN114396052 A CN 114396052A CN 202111662318 A CN202111662318 A CN 202111662318A CN 114396052 A CN114396052 A CN 114396052A
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- retaining
- pile
- foundation pit
- piles
- supporting
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- 230000008093 supporting effect Effects 0.000 title abstract description 33
- 230000000903 blocking effect Effects 0.000 title description 3
- 239000002689 soil Substances 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 241001474374 Blennius Species 0.000 claims description 7
- 235000012054 meals Nutrition 0.000 claims description 7
- 239000004576 sand Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 240000003728 Spergula arvensis Species 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- 239000000945 filler Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 241000512259 Ascophyllum nodosum Species 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 230000002180 anti-stress Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a foundation pit supporting and retaining structure which comprises a top beam, a plurality of first supporting and retaining piles and a plurality of second supporting and retaining piles, wherein the plurality of first supporting and retaining piles and the plurality of second supporting and retaining piles are circumferentially distributed at intervals along the edge of a foundation pit, the top beam is annular and is arranged along the edge of the upper end of the foundation pit, the upper end of each first supporting and retaining pile and the upper end of each second supporting and retaining pile are fixedly connected with the position corresponding to the top beam, the lower end of each first supporting and retaining pile is obliquely and downwards inserted into soil at the edge of the foundation pit, the lower end of each second supporting and retaining pile is obliquely and downwards inserted into the bottom wall of the foundation pit, so that the top beam, the plurality of first supporting and retaining piles and the plurality of second supporting and retaining piles form a support with the inverted V-shaped cross section at the edge of the foundation pit, so that the earth beside the foundation pit can be effectively supported, and the second supporting and retaining piles only partially go into the ground, therefore, the construction cost is lower.
Description
Technical Field
The invention belongs to the field of foundation pit supporting, and particularly relates to a foundation pit supporting and retaining structure.
Background
For areas with higher terrain or lack of underground water, a foundation pit supporting system does not need to worry about the trouble of underground water, so the construction of a foundation pit supporting and retaining structure is more flexible, but the existing foundation pit supporting and retaining are constructed in earthwork at the edge of a foundation pit, the stress of the existing foundation pit supporting and retaining is usually one-way inclined pulling, and the supporting and retaining effect is poor.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a foundation pit retaining structure which is simple in structure, convenient to construct and good in retaining effect.
In order to achieve the purpose, the technical scheme of the invention is as follows: the utility model provides a foundation ditch props up fender structure, includes back timber, many first fender pile and many second fender piles, many first fender pile and many the second props up fender pile all along the marginal hoop interval distribution of foundation ditch, the back timber is the annular and follows foundation ditch upper end edge sets up, every first fender pile and every the second prop up the upper end of fender pile all with the position department that the back timber corresponds is connected fixedly, every the lower extreme slope of first fender pile inserts downwards in the soil of foundation ditch edge, every the lower extreme slope of second fender pile inserts downwards in the diapire of foundation ditch.
The beneficial effects of the above technical scheme are that: so by back timber, many first fender piles and many second fender piles be in the edge of foundation ditch constitutes the cross-section and is "Λ" shape support, so can the other earthwork of foundation ditch carry out more effective support, and its second fender pile only locally goes into underground simultaneously, so its construction cost is also lower.
In the technical scheme, the inclined angle between the first retaining pile and the horizontal plane is alpha, the inclined angle between the second retaining pile and the horizontal plane is omega, and both alpha and omega are between 70 degrees and 80 degrees.
The beneficial effects of the above technical scheme are that: so make first fender pile and second fender pile strut the better performance, can avoid the second to prop up the normal construction that fender pile influences in the foundation ditch simultaneously.
In the technical scheme, the horizontal heights of the lower end parts of the first retaining pile and the second retaining pile are lower than the horizontal height of the bottom wall of the foundation pit, and the vertical distance between the lower end part of the first retaining pile and the lower end part of the second retaining pile to the bottom wall of the foundation pit is 1/4-1/3 of the depth of the foundation pit.
The beneficial effects of the above technical scheme are that: therefore, the construction cost of the first retaining pile and the second retaining pile is reduced while good supporting performance is kept.
In the technical scheme, the number of the first supporting piles is consistent with that of the second supporting piles, and the first supporting piles and the second supporting piles are distributed in a staggered mode along the circumferential direction of the edge of the foundation pit.
The beneficial effects of the above technical scheme are that: so make first fender stake and second fender stake at foundation ditch edge equipartition to it is better to the effect of strutting of foundation ditch next door earthwork to make it.
The above techniqueThe distance between two adjacent first retaining piles along the edge line of the foundation pit is L1Wherein L is10.5-1.5m, and the distance between two adjacent second retaining piles along the edge line of the foundation pit is L2Wherein L is2Is 0.5-1.5 m.
The beneficial effects of the above technical scheme are that: so make first fender pile and second fender pile distribute more evenly, strut the effect better simultaneously.
In the technical scheme, the first retaining pile and the second retaining pile are both steel pipe piles filled with expansion materials.
The beneficial effects of the above technical scheme are that: so make the inflation layer in first fender stake and the second fender stake compacter to make the anti stress effect of first fender stake and second fender stake better.
In the technical scheme, the upper ends of the first supporting piles and the second supporting piles protrude out of the ground by 10-20cm, and the top beam is arranged at the upper ends of the first supporting piles and the second supporting piles.
Above-mentioned technical scheme's beneficial effect lies in, so make the back timber can be more convenient with first fender pile and second fender pile erection joint.
In the technical scheme, the top beam is a steel member, and the upper end of the top beam is 0.3-0.6m higher than the ground.
The beneficial effects of the above technical scheme are that: therefore, the top beam can form a circle of blocking protection for the upper end edge of the foundation pit.
In the technical scheme, the expansion material is a mixture of sand and seaweed meal.
The beneficial effects of the above technical scheme are that: the seaweed meal has good expansion performance, so that the seaweed meal can be filled in the holes among the sand after swelling in water in the steel pipe pile, and the filler in the steel pipe pile is more compact.
Drawings
Fig. 1 is a schematic structural diagram of a foundation pit retaining structure according to an embodiment of the present invention;
FIG. 2 is a schematic view of an assembly of a cap, a first retaining pile and a second retaining pile according to an embodiment of the invention;
fig. 3 is another schematic structural diagram of the foundation pit retaining structure according to the embodiment of the present invention.
In the figure: 1 top beam, 2 first retaining piles, 3 second retaining piles and 4 foundation pits.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth to illustrate, but are not to be construed to limit the scope of the invention.
As shown in fig. 1 and fig. 2, this embodiment provides a foundation pit retaining structure, which includes a top beam 1, a plurality of first retaining piles 2 and a plurality of second retaining piles 3, wherein the plurality of first retaining piles 2 and the plurality of second retaining piles 3 are all circumferentially distributed along an edge of a foundation pit 4 at intervals, the top beam 1 is annular and is disposed along an upper end edge of the foundation pit 4, an upper end of each first retaining pile 2 and each second retaining pile 3 is fixedly connected to a position corresponding to the top beam 1, a lower end of each first retaining pile 2 is obliquely inserted downward into soil at an edge of the foundation pit 4, a lower end of each second retaining pile 3 is obliquely inserted downward into a bottom wall of the foundation pit 4, so that a cross section formed by the top beam, the plurality of first retaining piles and the plurality of second retaining piles at the edge of the foundation pit is a support in a shape of "Λ", so that a more effective support can be performed on earthwork beside the foundation pit, meanwhile, the second retaining pile is only partially arranged in the ground, so that the construction cost is lower.
In the technical scheme, the inclined included angle between the first retaining pile 2 and the horizontal plane is alpha, the inclined included angle between the second retaining pile 3 and the horizontal plane is omega, wherein both alpha and omega are between 70 degrees and 80 degrees, so that the first retaining pile and the second retaining pile have better supporting performance, and meanwhile, the second retaining pile can be prevented from influencing the normal construction in the foundation pit.
Among the above-mentioned technical scheme the level of first fender pile 2 and 3 lower extreme tip of second fender pile all is less than the level of 4 diapire of foundation ditch, just 2 lower extreme tip of first fender pile and 3 lower extreme tip of second fender pile extremely vertical interval between 4 diapire of foundation ditch is 1/4-1/3 of the depth of foundation ditch 4, so make first fender pile and second fender pile reduce its construction cost when keeping good supporting performance.
In the technical scheme, the number of the first retaining piles 2 is consistent with that of the second retaining piles 3, and the first retaining piles 2 and the second retaining piles 3 are distributed along the circumferential direction of the edge of the foundation pit 4 in a staggered mode.
The beneficial effects of the above technical scheme are that: so make first fender stake and second fender stake at foundation ditch edge equipartition to it is better to the effect of strutting of foundation ditch next door earthwork to make it.
In the technical scheme, the distance between every two adjacent first retaining piles 2 along the edge line of the foundation pit 4 is L1Wherein L is1Is 0.5-1.5m, and the distance between two adjacent second retaining piles 3 along the edge line of the foundation pit 4 is L2Wherein L is2Is 0.5-1.5m, so that the first retaining pile and the second retaining pile are distributed more uniformly, and the supporting effect is better.
Among the above-mentioned technical scheme first retaining pile 2 and second retaining pile 3 are the inside steel-pipe pile that is filled with expanding material, so make the inflation layer in first retaining pile and the second retaining pile compacter to make the anti stress effect of first retaining pile and second retaining pile better.
As shown in fig. 3, in the above technical solution, the upper ends of the first retaining pile 2 and the second retaining pile 3 protrude 10-20cm from the ground, and the top beam 1 is installed at the upper ends of the plurality of first retaining piles 2 and the plurality of second retaining piles 3, so that the top beam can be more conveniently installed and connected with the first retaining pile and the second retaining pile.
In the technical scheme, the top beam 1 is a steel member, and the upper end of the top beam 1 is 0.3-0.6m higher than the ground, so that a circle of shielding protection can be formed on the upper end edge of the foundation pit by the top beam.
Wherein, first fender pile and second fender pile all with the back timber passes through bolt and nut bolted connection, so can dismantle the recovery and recycle.
According to the technical scheme, the expansion material is a mixture of sand and seaweed meal, and the seaweed meal has good expansion performance, so that the pores between the sand can be filled after the seaweed meal is expanded when meeting water in the steel pipe pile, and the filler in the steel pipe pile is more compact.
The first retaining pile and the second retaining pile are formed by firstly putting a steel pipe pile in place and then adding fillers into the steel pipe pile, wherein the fillers are mixed with sand of kelp powder (the kelp powder and the sand are mixed uniformly in advance, and the preferred mass of the kelp powder is 3% -15% of the total mass of the fillers), and then adding water into the fillers to completely soak the fillers.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. The utility model provides a foundation ditch retaining structure, its characterized in that includes back timber (1), many first fender pile (2) and many second fender pile (3) all follow the marginal hoop interval distribution of foundation ditch (4), back timber (1) is the annular and follows foundation ditch (4) upper end edge sets up, every first fender pile (2) and every the upper end of second fender pile (3) all with the position department that back timber (1) corresponds is connected fixedly, every the lower extreme slope of first fender pile (2) inserts downwards in the soil of foundation ditch (4) edge, every the lower extreme slope of second fender pile (3) inserts downwards in the diapire of foundation ditch (4).
2. The foundation pit retaining structure according to claim 1, wherein the first retaining pile (2) has an inclination angle α with the horizontal plane, and the second retaining pile (3) has an inclination angle ω with the horizontal plane, wherein α and ω are both between 70 ° and 80 °.
3. The foundation pit retaining structure according to claim 1, characterized in that the horizontal height of the lower end of each of the first retaining pile (2) and the second retaining pile (3) is lower than the horizontal height of the bottom wall of the foundation pit (4), and the vertical distance between the lower end of each of the first retaining pile (2) and the second retaining pile (3) to the bottom wall of the foundation pit (4) is 1/4-1/3 of the depth of the foundation pit (4).
4. The foundation pit retaining structure according to claim 1, wherein the number of the first retaining piles (2) and the number of the second retaining piles (3) are the same, and a plurality of the first retaining piles (2) and a plurality of the second retaining piles (3) are circumferentially distributed in a staggered manner along the edge of the foundation pit (4).
5. The foundation pit retaining structure according to claim 1, wherein the distance between two adjacent first retaining piles (2) along the edge line of the foundation pit (4) is L1Wherein L is1Is 0.5-1.5m, and the distance between two adjacent second retaining piles (3) along the edge line of the foundation pit (4) is L2Wherein L is2Is 0.5-1.5 m.
6. The foundation pit retaining structure according to any one of claims 1-5, wherein the first retaining pile (2) and the second retaining pile (3) are both steel pipe piles filled with expansion materials.
7. The foundation pit retaining structure according to claim 6, wherein the upper ends of the first retaining pile (2) and the second retaining pile (3) protrude 10-20cm above the ground, and the top beam (1) is installed at the upper ends of the plurality of first retaining piles (2) and the plurality of second retaining piles (3).
8. The foundation pit retaining structure according to claim 7, characterized in that the top beam (1) is a steel member, and the upper end of the top beam is 0.3-0.6m higher than the ground.
9. The foundation pit retaining structure of claim 6, wherein the intumescent material is a mixture of sand and seaweed meal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111662318.2A CN114396052B (en) | 2021-12-31 | Foundation pit retaining structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111662318.2A CN114396052B (en) | 2021-12-31 | Foundation pit retaining structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114396052A true CN114396052A (en) | 2022-04-26 |
| CN114396052B CN114396052B (en) | 2024-10-29 |
Family
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150211200A1 (en) * | 2012-07-20 | 2015-07-30 | Itogumi Construction Co., Ltd., | Pile foundation and pile foundation installation method |
| CN107574825A (en) * | 2017-07-27 | 2018-01-12 | 天津大学 | Foundation pit supporting method and raked pile |
| CN111962526A (en) * | 2020-08-27 | 2020-11-20 | 贵州大学 | Vertical-to-horizontal bidirectional constraint anchor-pull pile supporting structure and construction method thereof |
| CN112761164A (en) * | 2021-01-22 | 2021-05-07 | 贵州大学 | Soil foundation pit steel pipe pile composite retaining structure and construction method |
| CN213417835U (en) * | 2020-08-26 | 2021-06-11 | 中建八局天津建设工程有限公司 | Prevent straight combination supporting construction of slope of foundation ditch deformation |
| CN216865181U (en) * | 2021-12-31 | 2022-07-01 | 贵州大学 | Foundation pit supporting and blocking structure |
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150211200A1 (en) * | 2012-07-20 | 2015-07-30 | Itogumi Construction Co., Ltd., | Pile foundation and pile foundation installation method |
| CN107574825A (en) * | 2017-07-27 | 2018-01-12 | 天津大学 | Foundation pit supporting method and raked pile |
| CN213417835U (en) * | 2020-08-26 | 2021-06-11 | 中建八局天津建设工程有限公司 | Prevent straight combination supporting construction of slope of foundation ditch deformation |
| CN111962526A (en) * | 2020-08-27 | 2020-11-20 | 贵州大学 | Vertical-to-horizontal bidirectional constraint anchor-pull pile supporting structure and construction method thereof |
| CN112761164A (en) * | 2021-01-22 | 2021-05-07 | 贵州大学 | Soil foundation pit steel pipe pile composite retaining structure and construction method |
| CN216865181U (en) * | 2021-12-31 | 2022-07-01 | 贵州大学 | Foundation pit supporting and blocking structure |
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