CN113931196A - High-stability foundation pit supporting structure under complex condition and construction method thereof - Google Patents
High-stability foundation pit supporting structure under complex condition and construction method thereof Download PDFInfo
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- CN113931196A CN113931196A CN202111290358.9A CN202111290358A CN113931196A CN 113931196 A CN113931196 A CN 113931196A CN 202111290358 A CN202111290358 A CN 202111290358A CN 113931196 A CN113931196 A CN 113931196A
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- 238000010276 construction Methods 0.000 title claims abstract description 35
- 230000003014 reinforcing effect Effects 0.000 claims description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 239000002689 soil Substances 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000011324 bead Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- 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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/16—Auxiliary devices rigidly or detachably arranged on sheet piles for facilitating assembly
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
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- Mining & Mineral Resources (AREA)
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Abstract
The technical scheme is a high-stability foundation pit supporting structure under a complex condition and a construction method thereof, belongs to the field of foundation pit basement supporting, and discloses the high-stability foundation pit supporting structure under the complex condition, which comprises a pit body, a supporting unit arranged in the pit body, a first bottom plate arranged at the bottom of the pit body, a second bottom plate arranged at the upper side of the first bottom plate, and side plates arranged between the first bottom plate and the second bottom plate, wherein the side plates are arranged along the edge of the first bottom plate; meanwhile, the construction method of the high-stability foundation pit supporting structure under the complex condition is disclosed, and comprises the construction step of the high-stability foundation pit supporting structure under the complex condition; the scheme can reduce the construction difficulty and the engineering quantity of the foundation pit basement support and improve the construction economic efficiency.
Description
Technical Field
The invention relates to the field of foundation pit basement support, in particular to a high-stability foundation pit support structure under complex conditions and a construction method thereof.
Background
The foundation pit support is a retaining, reinforcing and protecting measure adopted for the side wall of the foundation pit and the surrounding environment in order to ensure the safety of the construction of an underground structure and the surrounding environment of the foundation pit.
In modern buildings, basements are arranged in office buildings, districts, markets and other places, the basements are arranged in foundation pits, the foundation pits are usually supported in a mode of adapting to basement construction, and the specific foundation pit supporting mode can refer to the technical scheme with the patent application number of 200910222226.5, and discloses a foundation pit supporting construction method with a basement building, which is characterized in that an inner support is arranged at the top of a supporting pile for the foundation pit with two layers of basements, a second inner support is arranged above the first layer of basement bottom plate by 50cm, when the designed elevation of the foundation pit is excavated, the second layer of basement bottom plate and the side wall are poured, then the first layer of basement bottom plate is poured, the second layer of basement bottom plate and the side wall form a box-shaped structure, then a gap between the basement side wall and the supporting pile is removed, the second inner support is filled by static blasting, and the basement side wall is continuously constructed, and removing the first inner support after backfilling a gap between the side wall of the underground chamber and the support pile.
Above-mentioned this scheme, arrange twice at the internal different positions of pit and support, strut the pit body, wait to demolish after basement structure construction accomplishes, also be the layering construction mode that tradition was used always, demolish the temporary support on this layer after having built the first floor, demolish the temporary support on this layer after having built the second floor, but this supporting construction economic efficiency is low, the construction is inconvenient and the engineering volume is big.
At present, most of foundation pit supporting structures are detached in a traditional layered mode, and the problems of low construction economic efficiency, inconvenient construction and large construction engineering quantity exist.
Disclosure of Invention
The invention aims to provide a high-stability foundation pit supporting structure under a complex condition and a construction method thereof, which can reduce the construction difficulty and the engineering quantity of foundation pit basement supporting and improve the construction economic efficiency.
The technical scheme provided by the invention is as follows: a high-stability foundation pit supporting structure under complex conditions comprises a pit body, a supporting unit arranged in the pit body, a first bottom plate arranged at the bottom of the pit body, a second bottom plate arranged on the upper side of the first bottom plate, and side plates arranged between the first bottom plate and the second bottom plate, wherein the side plates are arranged along the edge of the first bottom plate; the supporting beam and the crown beam extend horizontally, and the supporting beam is fixedly connected with the supporting pile, the lattice column and the crown beam respectively; the lower ends of the mixing piles, the supporting piles and the lattice columns extend to the lower side of the bottom of the pit body; a first support plate and a second support plate are respectively arranged between the first bottom plate and the support pile and between the second bottom plate and the support pile; and first backfill soil and second backfill soil are respectively arranged between the first replacement supporting plate and the bottom of the pit body and between the first replacement supporting plate and the second replacement supporting plate.
In the high-stability foundation pit supporting structure under the complex conditions, the crown beam is provided with a first reinforcing rib arranged corresponding to the supporting beam; and two ends of the first reinforcing rib are respectively arranged at two sides of the corresponding supporting beam and embedded into the crown beam.
In the high-stability foundation pit supporting structure under the complex conditions, the supporting beam is provided with second reinforcing ribs arranged corresponding to the lattice columns; and two ends of the second reinforcing rib are respectively arranged at two sides of the corresponding lattice column and are embedded into the supporting columns.
In the high-stability foundation pit supporting structure under the complex conditions, a third reinforcing rib is arranged between the intersection nodes of the supporting beam and the crown beam, and two ends of the third reinforcing rib are respectively embedded into the supporting beam and the crown beam; and a fourth reinforcing rib is arranged between the crossed nodes of the adjacent supporting beams, and two ends of the fourth reinforcing rib are respectively embedded into the corresponding crown beams.
In the high-stability foundation pit supporting structure under the complex conditions, the lattice column comprises a column body and a column pier arranged on the lower side of the bottom of the pit body; the lower end of the column body extends into the column pier, and the column body is provided with batten plates arranged along the extending direction of the column body.
In the high-stability foundation pit supporting structure under the complex condition, the upper end of the column body extends to the inside of the supporting beam.
In the high-stability foundation pit supporting structure under the complex conditions, the cylinder body is provided with a support block positioned between the adjacent gusset plates; the supporting blocks are arranged on four sides of the column body in a surrounding mode and are fixedly connected with the bottom of the supporting beam.
In the high-stability foundation pit supporting structure under the complex conditions, the cylinder body is provided with the water stop block between the adjacent batten plates; the water stop blocks are respectively arranged at four corners of the column body and are positioned at the upper side of the column pier; the lower side of the water stop block is embedded into the column body.
In the high-stability foundation pit supporting structure under the complex conditions, the water stop block comprises angle steel attached to the edge of the column body and a steel sheet arranged at the bottom of the angle steel; one side of the steel sheet close to the column body is embedded into the column body.
A construction method of a high-stability foundation pit supporting structure under a complex condition comprises the high-stability foundation pit supporting structure under the complex condition, and further comprises the following construction steps:
the method comprises the following steps: after stirring piles distributed along the outline of the pit body are arranged on the lower side of the flat ground, supporting piles and lattice columns are arranged in the outline of the pit body; the lower ends of the mixing piles, the supporting piles and the lattice columns are positioned on the lower side of the bottom of the pit body;
step two: after a preset section layer is dug at the top of the pit body, a crown beam and a support beam are poured in the preset section layer, the support beam is fixedly connected with the support piles, the lattice columns and the crown beam respectively, and the depth of the preset section layer is 0.5 m;
step three: excavating the bottom of the preset fault to the elevation of the bottom of the pit body, arranging a first bottom plate, a first support plate between the support piles and the first bottom plate and a first backfill soil between the first support plate and the bottom of the pit body at the bottom of the pit body; the latticed column penetrates through the first bottom plate;
step four: the first bottom plate is provided with a side plate, a second bottom plate positioned between the side plate and the supporting beam, a second support replacing plate positioned between the second bottom plate and the supporting pile, and second backfill soil positioned between the second support replacing plate and the first support replacing plate; the lattice column penetrates through the second bottom plate;
step five: and removing the support beams and the lattice columns, and continuously constructing the main body structure on the second bottom plate.
After the technical scheme is adopted, the invention has the beneficial effects that:
this scheme is through setting up the mutually supporting of stirring stake, fender pile, a supporting beam, guan liang, lattice column, and lattice column runs through the bottom plate of two-layer basement, first bottom plate and second bottom plate promptly, and the basement structure of bottom layer and the bottom plate structure of upper basement pour the shaping back, demolish lattice column, a supporting beam, guan liang again, realize reducing the construction degree of difficulty and the engineering volume that the foundation ditch basement was strutted, improve construction economic efficiency.
Drawings
Fig. 1 is a schematic structural diagram of a high-stability foundation pit supporting structure under complex conditions in example 1 of the present invention;
fig. 2 is a schematic layout of the first reinforcing bead of embodiment 1 of the present invention;
fig. 3 is a schematic layout of a second reinforcing bead according to embodiment 1 of the present invention;
fig. 4 is a schematic layout view of a third reinforcing bead according to embodiment 1 of the present invention;
fig. 5 is a schematic layout view of a fourth reinforcing bead according to embodiment 1 of the present invention;
FIG. 6 is a schematic structural view of a lattice column of example 1 of the present invention;
FIG. 7 is a top view of a lattice column of example 1 of the present invention;
FIG. 8 is a schematic view showing the connection of a lattice column to a support beam according to example 1 of the present invention;
fig. 9 is a schematic structural view of a water stop block of embodiment 1 of the present invention;
fig. 10 is a flowchart of a construction method of a high-stability foundation pit supporting structure under complicated conditions according to embodiment 1 of the present invention.
Reference numerals: 1. supporting piles; 2. stirring the piles; 3. first backfilling; 4. a first support plate is replaced; 5. second backfilling; 6. a second supporting plate is replaced; 7. a support beam; 8. a side plate; 9. a second base plate; 10. a lattice column; 11. a first base plate; 12. a crown beam; 13. a first reinforcing rib; 14. a second reinforcing rib; 15. a third reinforcing rib; 16. a fourth reinforcing rib;
1001. a cylinder; 1002. pillar piers; 1003. a support block; 1004. a batten plate; 1005. a water stop block; 1006. a steel sheet; 1007. and (5) angle steel.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to the following embodiments, but the present invention is not limited thereto.
Example 1:
as shown in fig. 1 to 9, a high-stability foundation pit supporting structure under a complex condition includes a pit body, a supporting unit disposed in the pit body, a first bottom plate 11 disposed at the bottom of the pit body, a second bottom plate 9 disposed at the upper side of the first bottom plate 11, and a side plate 8 disposed between the first bottom plate 11 and the second bottom plate 9, wherein the side plate 8 is arranged along the edge of the first bottom plate 11, the supporting unit includes a plurality of stirring piles 2 arranged along the inner wall of the pit body, supporting piles 1 arranged between the first bottom plate 11 and the stirring piles 2, lattice columns 10 penetrating through the first bottom plate 11 and the second bottom plate 9, supporting beams 7 disposed at the upper side of the first bottom plate 11, and crown beams 12; the supporting beam 7 and the crown beam 12 extend horizontally, and the supporting beam 7 is fixedly connected with the supporting pile 1, the lattice column 10 and the crown beam 12 respectively; the lower ends of the mixing pile 2, the support pile 1 and the lattice column 10 extend to the lower side of the bottom of the pit body.
The implementation effect does, through setting up stirring pile 2, fender pile 1, a supporting beam 7, hat roof beam 12, mutually supporting of lattice column 10, lattice column 10 runs through the bottom plate of two-layer basement, first bottom plate 11 and second bottom plate 9 promptly, and the basement structure of bottom and the bottom plate structure of upper basement are pour the shaping back, demolish lattice column 10, a supporting beam 7, hat roof beam 12 again, realize reducing the construction degree of difficulty and the engineering volume that the basement of foundation ditch strutted, improve construction economic efficiency.
In specific implementation, a first support plate 4 and a second support plate 6 are respectively arranged between the first bottom plate 11 and the support pile 1 and between the second bottom plate 9 and the support pile 1; and first backfill soil 3 and second backfill soil 5 are respectively arranged between the first replacement supporting plate 4 and the bottom of the pit body and between the first replacement supporting plate 4 and the second replacement supporting plate 6.
The compaction coefficients of the first backfill soil 3 and the second backfill soil 5 are more than 0.94, and the materials can be sandy soil or cohesive soil; the first and second exchange bracing plates 4 and 6 are both 300mm thick C20 plain concrete exchange bracing plates.
Preferably, the crown beam 12 is provided with a first reinforcing rib 13 arranged corresponding to the support beam 7; the two ends of the first reinforcing rib 13 are respectively arranged at the two sides of the corresponding supporting beam 7 and embedded in the crown beam 12.
Further preferably, the support beam 7 is provided with a second reinforcing rib 14 arranged corresponding to the lattice column 10; the two ends of the second reinforcing rib 14 are respectively arranged at the two sides of the corresponding lattice column 10 and embedded in the supporting column.
More preferably, a third reinforcing rib 15 is arranged between the intersection nodes of the supporting beam 7 and the crown beam 12, and two ends of the third reinforcing rib 15 are respectively embedded into the supporting beam 7 and the crown beam 12; and a fourth reinforcing rib 16 is arranged between the intersecting nodes of the adjacent supporting beams 7, and two ends of the fourth reinforcing rib 16 are respectively embedded into the corresponding crown beams 12.
The first reinforcing rib 13, the second reinforcing rib 14, the third reinforcing rib 15 and the fourth reinforcing rib 16 respectively improve the connection strength of the corresponding connection parts, and the connection effect is improved.
The lattice column 10 has a specific structure that the lattice column 10 comprises a column 1001 and a column pier 1002 arranged on the lower side of the bottom of the pit body; the lower end of the column 1001 extends into a column pier 1002, and the column 1001 is provided with a batten 1004 arranged along the extending direction of the column 1001.
The column 1001 is connected to the support beam 7 in such a manner that the upper end of the column 1001 extends into the support beam 7.
In practical application, the cylinder 1001 is provided with a support bracket 1003 between adjacent batten plates 1004; the support bracket blocks 1003 are arranged around the four sides of the column 1001, and are fixedly connected with the bottom of the support beam 7.
In implementation and application, the cylinder 1001 is provided with a water stop block 1005 between adjacent batten plates 1004; the water stop blocks 1005 are respectively arranged at four corners of the column 1001 and are positioned at the upper side of the column pier 1002; the lower side of the waterproof block 1005 is fitted into the cylinder 1001.
In this embodiment, a plurality of water stops are used to block the outside of the column 1001, so as to prevent water from leaking from the construction cold joint.
The water stop block 1005 has a specific structure that the water stop block 1005 comprises an angle steel 1007 attached to an edge of the column 1001 and a steel sheet 1006 arranged at the bottom of the angle steel 1007; the side of the steel sheet 1006 adjacent to the cylinder 1001 is embedded within the cylinder 1001.
The stagnant water is embedded into cylinder 1001 soon, avoids producing great gap between water stagnant water and cylinder 1001, prevents the infiltration.
Example 2:
as shown in fig. 10, a construction method of a high-stability foundation pit supporting structure under a complex condition includes the high-stability foundation pit supporting structure under a complex condition in example 1, and further includes the following construction steps:
the method comprises the following steps: after the stirring piles 2 distributed along the outline of the pit body are arranged on the lower side of the flat ground, the supporting piles 1 and the lattice columns 10 are arranged in the outline of the pit body; the lower ends of the mixing pile 2, the supporting pile 1 and the lattice column 10 are positioned at the lower side of the bottom of the pit body;
step two: after a preset section layer is dug at the top of the pit body, a crown beam 12 and a support beam 7 are poured in the preset section layer, the support beam 7 is respectively and fixedly connected with a support pile 1, a lattice column 10 and the crown beam 12, and the depth of the preset section layer is 0.5 m;
step three: excavating the bottom of a preset fault to the elevation of the bottom of the pit body, arranging a first bottom plate 11, a first support plate 4 between the support pile 1 and the first bottom plate 11 and a first backfill soil 3 between the first support plate 4 and the bottom of the pit body at the bottom of the pit body; the lattice column 10 penetrates through the first bottom plate 11;
step four: a side plate 8, a second bottom plate 9 positioned between the side plate 8 and the support beam 7, a second support replacing plate 6 positioned between the second bottom plate 9 and the support pile 1, and second backfill soil 5 positioned between the second support replacing plate 6 and the first support replacing plate 4 are arranged on the first bottom plate 11; the lattice column 10 penetrates through the second bottom plate 9;
step five: the support beams 7 and the lattice columns 10 are removed and the construction of the main structure is continued on the second bottom plate 9.
And (2) carrying out layered excavation on the pit body, namely reserving the middle area of the pit body without excavating, then symmetrically excavating towards the edge of the pit body by taking the middle area as a circle center, constructing by taking 20 meters along the sideline of the pit body as a unit by the fragments, forming an annular pit body, then excavating the middle area, and excavating to the bottom according to the mode.
After concrete members such as the crown beam 12, the support beam 7, the lattice column 10, etc. are cast, when the strength of the members is 75% or more of the design value, the next step of construction can be continued.
The lattice column 10 is removed in such a manner that the pier 1002 and the column 1001 located at the lower side of the first floor 11 are left and the column 1001 located at the upper side of the first floor 11 is completely removed.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. A high-stability foundation pit supporting structure under complex conditions comprises a pit body, a supporting unit arranged in the pit body, a first bottom plate (11) arranged at the bottom of the pit body, a second bottom plate (9) arranged on the upper side of the first bottom plate (11), and a side plate (8) arranged between the first bottom plate (11) and the second bottom plate (9), wherein the side plate (8) is arranged along the edge of the first bottom plate (11), and the high-stability foundation pit supporting structure is characterized in that the supporting unit comprises a plurality of stirring piles (2) arranged along the inner wall of the pit body, supporting piles (1) arranged between the first bottom plate (11) and the stirring piles (2), lattice columns (10) penetrating through the first bottom plate (11) and the second bottom plate (9), a supporting beam (7) arranged on the upper side of the first bottom plate (11), and a crown beam (12); the supporting beam (7) and the crown beam (12) extend horizontally, and the supporting beam (7) is fixedly connected with the supporting pile (1), the lattice column (10) and the crown beam (12) respectively; the lower ends of the mixing piles (2), the supporting piles (1) and the latticed columns (10) extend to the lower side of the bottom of the pit body; a first support plate (4) and a second support plate (6) are respectively arranged between the first bottom plate (11) and the support pile (1) and between the second bottom plate (9) and the support pile (1); and first backfill soil (3) and second backfill soil (5) are respectively arranged between the first replacement support plate (4) and the bottom of the pit body and between the first replacement support plate (4) and the second replacement support plate (6).
2. The complex-condition high-stability foundation pit supporting structure according to claim 1, wherein the crown beam (12) is provided with a first reinforcing rib (13) arranged corresponding to the supporting beam (7); two ends of the first reinforcing rib (13) are respectively arranged at two sides of the corresponding supporting beam (7) and embedded in the crown beam (12).
3. The complex-condition high-stability foundation pit supporting structure according to claim 1, wherein the supporting beam (7) is provided with a second reinforcing rib (14) arranged corresponding to the lattice column (10); and two ends of the second reinforcing rib (14) are respectively arranged at two sides of the corresponding lattice column (10) and embedded into the supporting column.
4. The complex-condition high-stability foundation pit supporting structure according to claim 1, wherein a third reinforcing rib (15) is arranged between the intersection nodes of the supporting beam (7) and the crown beam (12), and two ends of the third reinforcing rib (15) are respectively embedded into the supporting beam (7) and the crown beam (12); and a fourth reinforcing rib (16) is arranged between the crossed nodes of the adjacent supporting beams (7), and two ends of the fourth reinforcing rib (16) are respectively embedded into the corresponding crown beams (12).
5. The complex condition high stability foundation pit supporting structure according to claim 1, wherein the lattice column (10) comprises a column body (1001), a column pier (1002) provided at the lower side of the bottom of the pit body; the lower end of the column body (1001) extends into the column pier (1002), and the column body (1001) is provided with batten plates (1004) which are arranged along the extending direction of the column body (1001).
6. The complex condition high stability underground structure as claimed in claim 1, wherein the upper end of the column (1001) is extended to the inside of the supporting beam (7).
7. The complex condition high stability foundation pit supporting structure according to claim 6, wherein the column body (1001) is provided with a supporting block (1003) between adjacent gusset plates (1004); the supporting blocks (1003) are arranged on four sides of the column body (1001) in a surrounding mode and are fixedly connected with the bottom of the supporting beam (7).
8. The complex condition high stability foundation pit supporting structure according to claim 1, wherein the column body (1001) is provided with a water stop block (1005) between adjacent gusset plates (1004); the water stop blocks (1005) are respectively arranged at four corners of the column body (1001) and are positioned at the upper side of the column pier (1002); the lower side of the water stop block (1005) is embedded into the cylinder (1001).
9. The foundation pit supporting structure with high stability under the complex condition as claimed in claim 1, wherein the water stop block (1005) comprises an angle steel (1007) attached to an edge of the column (1001), and a steel sheet (1006) arranged at the bottom of the angle steel (1007); one side of the steel sheet (1006) close to the column body (1001) is embedded in the column body (1001).
10. A construction method of a high-stability foundation pit supporting structure under a complex condition, comprising the high-stability foundation pit supporting structure under the complex condition as claimed in any one of claims 1 to 9, characterized by further comprising the following construction steps:
the method comprises the following steps: after stirring piles (2) distributed along the outline of the pit body are arranged on the lower side of the flat ground, supporting piles (1) and lattice columns (10) are arranged in the outline of the pit body; the lower ends of the mixing pile (2), the supporting pile (1) and the lattice column (10) are positioned at the lower side of the bottom of the pit body;
step two: after a preset section layer is dug at the top of the pit body, a crown beam (12) and a support beam (7) are poured in the preset section layer, the support beam (7) is respectively and fixedly connected with the support pile (1), the lattice column (10) and the crown beam (12), and the depth of the preset section layer is 0.5 m;
step three: excavating the bottom of a preset fault to the elevation of the bottom of the pit body, arranging a first bottom plate (11), a first support replacing plate (4) positioned between a support pile (1) and the first bottom plate (11) and first backfilling soil (3) positioned between the first support replacing plate (4) and the bottom of the pit body at the bottom of the pit body; the latticed column (10) penetrates through the first bottom plate (11);
step four: a side plate (8), a second bottom plate (9) positioned between the side plate (8) and the supporting beam (7), a second replacement plate (6) positioned between the second bottom plate (9) and the supporting pile (1), and second backfill soil (5) positioned between the second replacement plate (6) and the first replacement plate (4) are arranged on the first bottom plate (11); the latticed column (10) penetrates through the second bottom plate (9);
step five: and (4) removing the support beams (7) and the latticed columns (10), and continuously constructing the main body structure on the second bottom plate (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111290358.9A CN113931196A (en) | 2021-11-02 | 2021-11-02 | High-stability foundation pit supporting structure under complex condition and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111290358.9A CN113931196A (en) | 2021-11-02 | 2021-11-02 | High-stability foundation pit supporting structure under complex condition and construction method thereof |
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| CN113931196A true CN113931196A (en) | 2022-01-14 |
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| CN202111290358.9A Pending CN113931196A (en) | 2021-11-02 | 2021-11-02 | High-stability foundation pit supporting structure under complex condition and construction method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009084919A (en) * | 2007-10-01 | 2009-04-23 | Kajima Corp | Ground excavating method |
| CN110306557A (en) * | 2019-07-10 | 2019-10-08 | 武汉立诚岩土工程有限公司 | Earthwork digging method based on basement deep-foundation pit engineering |
| CN213867832U (en) * | 2020-08-10 | 2021-08-03 | 中南勘察设计院集团有限公司 | Foundation pit trestle stand column structure free of being provided with cross braces |
-
2021
- 2021-11-02 CN CN202111290358.9A patent/CN113931196A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009084919A (en) * | 2007-10-01 | 2009-04-23 | Kajima Corp | Ground excavating method |
| CN110306557A (en) * | 2019-07-10 | 2019-10-08 | 武汉立诚岩土工程有限公司 | Earthwork digging method based on basement deep-foundation pit engineering |
| CN213867832U (en) * | 2020-08-10 | 2021-08-03 | 中南勘察设计院集团有限公司 | Foundation pit trestle stand column structure free of being provided with cross braces |
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Application publication date: 20220114 |