CN115162355A - Foundation pit enclosure method for expanding construction from deep foundation pit to shallow foundation pit - Google Patents
Foundation pit enclosure method for expanding construction from deep foundation pit to shallow foundation pit Download PDFInfo
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- CN115162355A CN115162355A CN202210856523.0A CN202210856523A CN115162355A CN 115162355 A CN115162355 A CN 115162355A CN 202210856523 A CN202210856523 A CN 202210856523A CN 115162355 A CN115162355 A CN 115162355A
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- 238000010276 construction Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000009434 installation Methods 0.000 claims abstract description 9
- 238000002360 preparation method Methods 0.000 claims abstract description 6
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 230000032258 transport Effects 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000003908 quality control method Methods 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
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/30—Prefabricated piles made of concrete or reinforced concrete or made of steel and concrete
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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
- E02D5/58—Prestressed concrete piles
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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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Abstract
The invention relates to the technical field of foundation pit bracing, and discloses a foundation pit bracing method for expanding construction from a deep foundation pit to a shallow foundation pit, which comprises the following steps of S1, construction preparation; s2: treatment on a construction site; s3, pre-burying the tubular pile; s4, mounting a support protection plate; s5, reinforcing the junction of the shallow foundation pit and the deep foundation pit; s6, finishing enclosure. According to the invention, the embedded rod is arranged at the bottom of the precast tubular pile, so that the precast tubular pile can be conveniently embedded, the first barb and the second barb are arranged outside the precast tubular pile, so that the installation stability of the precast tubular pile is better, and the construction efficiency of the precast tubular pile is effectively improved.
Description
Technical Field
The invention relates to the technical field of foundation pit bracing, in particular to a foundation pit bracing method for expanding construction from a deep foundation pit to a shallow foundation pit.
Background
In the building construction process, the original underground foundation is often changed due to the adjustment of the functions of the underground structure, for example, due to the change of the structural functions, the underground structure needs to be expanded from a deep foundation pit to a shallow foundation pit, so that the axis of the underground structure, a pile foundation of a bearing platform, the deep foundation pit and the shallow foundation pit need to be enclosed on the basis of the original enclosure of the foundation pit.
The Chinese patent discloses a foundation pit enclosure method for expanding construction from a deep foundation pit to a shallow foundation pit (with the publication number of CN 110284506A), in the technical construction process of the patent, piling, pore-forming and pore-forming grouting can be almost simultaneously carried out, compared with a mode of directly drilling and pouring a pile, the method has the effects of quickly forming a pile groove, facilitating quality control of the pile groove, shortening the construction period and improving the construction efficiency, but the method can play a role of enclosure, but the stability of the tubular pile during installation is poor, and more devices are used, and the operation is troublesome. Therefore, those skilled in the art provide a foundation pit enclosure method for extended construction from a deep foundation pit to a shallow foundation pit to solve the problems in the background art.
Disclosure of Invention
The invention aims to provide a foundation pit bracing method for expanding construction from a deep foundation pit to a shallow foundation pit, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a foundation pit bracing method for expanding construction from a deep foundation pit to a shallow foundation pit comprises the following steps:
s1, construction preparation: transporting machinery required for construction to a construction site, and simultaneously mixing and stirring concrete in advance at the construction site:
s2: and (3) treatment on a construction site: cleaning the junction of the shallow foundation pit and the deep foundation pit, and reasonably placing the construction equipment and tools prepared in the step S1 so as to be convenient for constructors to quickly take;
s3, embedding the tubular pile: the method comprises the following steps that mechanical equipment is utilized to uniformly and alternately arrange the precast tubular piles at the junction of a shallow foundation pit and a deep foundation pit, the tail ends of the precast tubular piles are inserted into the deep foundation pit, and meanwhile first barbs symmetrically arranged on the outer portions of the precast tubular piles are also inserted into the deep foundation pit, so that the precast tubular piles form a pile foundation;
s4, installing a supporting protection plate: installing a support protection plate between the two precast tubular piles pre-buried in the step S3, and inserting a first inserted rod arranged at the bottom of the support protection plate into the deep foundation pit;
s5, reinforcing the junction of the shallow foundation pit and the deep foundation pit: pouring concrete into the interior of the support protection plate after installation, thereby ensuring the support strength of the junction of the shallow foundation pit and the deep foundation pit;
s6, completing enclosure: and repeating the steps in the operations S3, S4 and S5, thereby completing the formation of the foundation pit enclosure.
As a still further scheme of the invention: the mechanical equipment used in the step S3 is a pile driver, the depth of the precast tubular pile entering the deep foundation pit is 20-30 meters, and an embedded rod is arranged at the bottom of the precast tubular pile.
As a still further scheme of the invention: the distance between the precast tubular piles in the step S3 is 2-4 m, and the precast tubular piles are PHC tubular piles.
As a still further scheme of the invention: in step S3, the first barbs are arranged in a rectangular shape, and the included angle between the first barbs and the precast tubular pile is 30-50 degrees.
As a still further scheme of the invention: in step S3, the outside of the precast tubular pile can be set to be a disc-shaped second barb, and the second barb is at least provided with five groups in the outside of the precast tubular pile.
As a still further scheme of the invention: and in the step S4, the bottom end of the first inserted bar is arranged in a conical shape, and the first inserted bar is inserted into the deep foundation pit to a depth of at least more than 3 m.
As a still further scheme of the invention: and in the step S4, a second inserted bar symmetrically penetrates through one side of the supporting protection plate, one end of the second inserted bar is connected with a connecting disc, and the other end of the second inserted bar is inserted into the shallow foundation pit.
As a still further scheme of the invention: the tail end of the second inserted bar is arranged in a conical shape, and the second inserted bar is inserted into the shallow foundation pit by at least more than 2 meters.
As a still further scheme of the invention: and in the step S5, concrete is poured into the supporting and protecting plate through the concrete pump and the guide pipe, so that the supporting and protecting plate forms a protecting pile wall, and the integral strength of the protecting pile wall is improved.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the embedded rod is arranged at the bottom of the precast tubular pile, so that the precast tubular pile can be conveniently embedded, the first barb and the second barb are arranged outside the precast tubular pile, so that the installation stability of the precast tubular pile is better, and the construction efficiency of the precast tubular pile is effectively improved.
Drawings
FIG. 1 is a schematic structural diagram of a foundation pit bracing method for extended construction from a deep foundation pit to a shallow foundation pit;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is a schematic structural diagram of a second inserted link in a foundation pit bracing method for extended construction from a deep foundation pit to a shallow foundation pit;
FIG. 4 is a schematic structural diagram of a first barb in a foundation pit bracing method for extended construction from a deep foundation pit to a shallow foundation pit;
fig. 5 is a schematic structural diagram of a second barb in the foundation pit bracing method for extended construction from a deep foundation pit to a shallow foundation pit.
In the figure: 1. prefabricating a tubular pile; 2. supporting the protection plate; 3. shallow foundation pits; 4. a first plunger; 5. a deep foundation pit; 6. a connecting disc; 7. a second plunger; 8. an embedded rod; 9. a first barb; 10. a second barb.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, an embodiment of the invention
A foundation pit bracing method for expanding construction from a deep foundation pit to a shallow foundation pit comprises the following steps:
s1, construction preparation: the machinery that will be under construction needs transports to the job site, mixes and stirs the concrete in advance at the job site simultaneously:
s2: and (3) treatment on a construction site: cleaning the junction of the shallow foundation pit 3 and the deep foundation pit 5, and reasonably placing the construction equipment and tools prepared in the step S1 so as to be convenient for constructors to quickly take;
s3, embedding the tubular pile: uniformly arranging the precast tubular piles 1 at the junctions of the shallow foundation pits 3 and the deep foundation pit 5 at intervals by using mechanical equipment, inserting the tail ends of the precast tubular piles 1 into the deep foundation pit 5, and simultaneously inserting first barbs 9 symmetrically arranged outside the precast tubular piles 1 into the deep foundation pit 5 so that the precast tubular piles 1 form a pile foundation;
the mechanical equipment used in the step S3 is a pile driver, the depth of the precast tubular pile 1 entering the deep foundation pit 5 is 20 meters, and the bottom of the precast tubular pile 1 is provided with an embedded rod 8; in the step S3, the distance between the precast tubular piles 1 is 2 meters, and the precast tubular piles 1 are PHC tubular piles; in the step S3, the first barbs 9 are arranged in a rectangular shape, and the included angle between the first barbs 9 and the precast tubular pile 1 is 30 degrees;
s4, installing a supporting protection plate 2: installing a support protection plate 2 between the two precast tubular piles 1 pre-buried in the step S3, and inserting a first inserted link 4 arranged at the bottom of the support protection plate 2 into the deep foundation pit 5;
in the step S4, the bottom end of the first inserted link 4 is arranged in a conical shape, and the first inserted link 4 is inserted into the deep foundation pit 5 to a depth of at least more than 3 m; in the step S4, a second inserted link 7 is symmetrically arranged on one side of the supporting and protecting plate 2 in a penetrating manner, one end of the second inserted link 7 is connected with a connecting disc 6, the other end of the second inserted link 7 is inserted into the shallow foundation pit 3, the tail end of the second inserted link 7 is arranged in a conical manner, the length of the second inserted link 7 inserted into the shallow foundation pit 3 is at least more than 2 m,
s5, reinforcing the junction of the shallow foundation pit 3 and the deep foundation pit 5: pouring concrete into the interior of the support protection plate 2 after installation, so as to ensure the support strength of the junction of the shallow foundation pit 3 and the deep foundation pit 5;
in the step S5, concrete is poured into the supporting and protecting plate 2 through a concrete pump and a guide pipe, so that the supporting and protecting plate 2 forms a protecting pile wall, and the overall strength of the protecting pile wall is improved;
s6, finishing enclosure: and repeating the steps in the operations S3, S4 and S5, thereby completing the formation of the foundation pit enclosure.
Example two
A foundation pit bracing method for expanding construction from a deep foundation pit to a shallow foundation pit comprises the following steps:
s1, construction preparation: the machinery that will be under construction needs transports to the job site, mixes and stirs the concrete in advance at the job site simultaneously:
s2: and (3) treatment on a construction site: cleaning the junction of the shallow foundation pit 3 and the deep foundation pit 5, and reasonably placing the construction equipment and tools prepared in the step S1 so as to be convenient for constructors to quickly take;
s3, embedding the tubular pile: uniformly arranging the precast tubular piles 1 at the junctions of the shallow foundation pit 3 and the deep foundation pit 5 at intervals by using mechanical equipment, inserting the tail ends of the precast tubular piles 1 into the deep foundation pit 5, and simultaneously inserting first barbs 9 symmetrically arranged outside the precast tubular piles 1 into the deep foundation pit 5 so that the precast tubular piles 1 form a pile foundation;
the mechanical equipment used in the step S3 is a pile driver, the depth of the precast tubular pile 1 entering the deep foundation pit 5 is 20 meters, and the bottom of the precast tubular pile 1 is provided with an embedded rod 8; in the step S3, the distance between the precast tubular piles 1 is 2 meters, and the precast tubular piles 1 are PHC tubular piles; in the step S3, the exterior of the precast tubular pile 1 can also be provided with a second reversed thorn 10 in a disc shape, and the second reversed thorn 10 is provided with at least five groups outside the precast tubular pile 1;
s4, installing a supporting protection plate 2: installing a support protection plate 2 between the two precast tubular piles 1 pre-buried in the step S3, and inserting a first inserted rod 4 arranged at the bottom of the support protection plate 2 into the deep foundation pit 5;
in the step S4, the bottom end of the first inserted link 4 is arranged in a conical shape, and the first inserted link 4 is inserted into the deep foundation pit 5 to a depth of at least more than 3 m; in the step S4, a second inserted link 7 is symmetrically arranged on one side of the supporting and protecting plate 2 in a penetrating manner, one end of the second inserted link 7 is connected with a connecting disc 6, the other end of the second inserted link 7 is inserted into the shallow foundation pit 3, the tail end of the second inserted link 7 is arranged in a conical manner, the length of the second inserted link 7 inserted into the shallow foundation pit 3 is at least more than 2 m,
s5, reinforcing the junction of the shallow foundation pit 3 and the deep foundation pit 5: pouring concrete into the interior of the support protection plate 2 after installation, so as to ensure the support strength of the junction of the shallow foundation pit 3 and the deep foundation pit 5;
in the step S5, concrete is poured into the supporting and protecting plate 2 through a concrete pump and a guide pipe, so that the supporting and protecting plate 2 forms a protecting pile wall, and the integral strength of the protecting pile wall is improved;
s6, completing enclosure: and repeating the steps in the operations S3, S4 and S5, thereby completing the formation of the foundation pit enclosure.
EXAMPLE III
A foundation pit bracing method for expanding construction from a deep foundation pit to a shallow foundation pit comprises the following steps:
s1, construction preparation: the machinery that will be under construction needs transports to the job site, mixes and stirs the concrete in advance at the job site simultaneously:
s2: and (3) treatment on a construction site: cleaning the junction of the shallow foundation pit 3 and the deep foundation pit 5, and reasonably placing the construction equipment and tools prepared in the step S1 so as to be convenient for constructors to quickly take;
s3, embedding the tubular pile: uniformly arranging the precast tubular piles 1 at the junctions of the shallow foundation pits 3 and the deep foundation pit 5 at intervals by using mechanical equipment, inserting the tail ends of the precast tubular piles 1 into the deep foundation pit 5, and simultaneously inserting first barbs 9 symmetrically arranged outside the precast tubular piles 1 into the deep foundation pit 5 so that the precast tubular piles 1 form a pile foundation;
the mechanical equipment used in the step S3 is a pile driver, the depth of the precast tubular pile 1 entering the deep foundation pit 5 is 30 meters, and the bottom of the precast tubular pile 1 is provided with an embedded rod 8; in the step S3, the distance between the precast tubular piles 1 is 4 meters, and the precast tubular piles 1 are PHC tubular piles; in the step S3, the first barbs 9 are arranged in a rectangular shape, and the included angle between the first barbs 9 and the precast tubular pile 1 is 50 degrees;
s4, installing a supporting protection plate 2: installing a support protection plate 2 between the two precast tubular piles 1 pre-buried in the step S3, and inserting a first inserted rod 4 arranged at the bottom of the support protection plate 2 into the deep foundation pit 5;
in the step S4, the bottom end of the first inserted link 4 is arranged in a conical shape, and the first inserted link 4 is inserted into the deep foundation pit 5 to a depth of at least more than 3 m; in the step S4, a second inserted link 7 is symmetrically arranged on one side of the supporting and protecting plate 2 in a penetrating manner, one end of the second inserted link 7 is connected with a connecting disc 6, the other end of the second inserted link 7 is inserted into the shallow foundation pit 3, the tail end of the second inserted link 7 is arranged in a conical manner, the length of the second inserted link 7 inserted into the shallow foundation pit 3 is at least more than 2 m,
s5, reinforcing the junction of the shallow foundation pit 3 and the deep foundation pit 5: pouring concrete into the interior of the support protection plate 2 after installation, so as to ensure the support strength of the junction of the shallow foundation pit 3 and the deep foundation pit 5;
in the step S5, concrete is poured into the supporting and protecting plate 2 through a concrete pump and a guide pipe, so that the supporting and protecting plate 2 forms a protecting pile wall, and the overall strength of the protecting pile wall is improved;
s6, finishing enclosure: and repeating the steps in the operations S3, S4 and S5, thereby completing the formation of the foundation pit enclosure.
According to the invention, the embedded rod 8 is arranged at the bottom of the precast tubular pile 1, so that the precast tubular pile 1 can be conveniently embedded, the first barb 9 and the second barb 10 are arranged outside the precast tubular pile 1, so that the installation stability of the precast tubular pile 1 is better, and the construction efficiency is effectively improved, the support and protection plate 2 is arranged between the two precast tubular piles 1, the connection stability of the support and protection plate 2 and the shallow foundation pit 5 and the shallow foundation pit 3 can be improved by using the first insertion rod 4 and the second insertion rod 7, and meanwhile, mortar is poured into the support and protection plate 2, so that a good support and maintenance effect can be provided for the junction of the shallow foundation pit 3 and the deep foundation pit 5, the arrangement can effectively improve the working efficiency, the used equipment is fewer, the energy consumption is reduced, the operation is convenient, and the support and maintenance effect is better.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. A foundation pit enclosure method for expanding construction from a deep foundation pit to a shallow foundation pit is characterized by comprising the following steps:
s1, construction preparation: the machinery that will be under construction needs transports to the job site, mixes and stirs the concrete in advance at the job site simultaneously:
s2: and (3) treatment on a construction site: cleaning the junction of the shallow foundation pit (3) and the deep foundation pit (5), and reasonably placing the construction equipment and tools prepared in the step S1 so as to be convenient for constructors to quickly take;
s3, embedding the tubular pile: the method comprises the following steps that mechanical equipment is utilized to uniformly and alternately arrange precast tubular piles (1) at the junction of a shallow foundation pit (3) and a deep foundation pit (5), the tail ends of the precast tubular piles (1) are inserted into the deep foundation pit (5), and meanwhile first barbs (9) symmetrically arranged on the outer portion of the precast tubular piles (1) are also inserted into the deep foundation pit (5), so that the precast tubular piles (1) form a pile foundation;
s4, installing a supporting protection plate (2): installing a supporting protection plate (2) between the two precast tubular piles (1) pre-buried in the step S3, and inserting a first insertion rod (4) arranged at the bottom of the supporting protection plate (2) into the deep foundation pit (5);
s5, reinforcing the junction of the shallow foundation pit (3) and the deep foundation pit (5): pouring concrete into the interior of the supporting and protecting plate (2) after installation, thereby ensuring the supporting strength of the junction of the shallow foundation pit (3) and the deep foundation pit (5);
s6, completing enclosure: and repeating the steps in the operations S3, S4 and S5, thereby completing the formation of the foundation pit enclosure.
2. A method for enclosing a foundation pit for extended construction from a deep foundation pit to a shallow foundation pit according to claim 1, wherein the mechanical equipment used in step S3 is a pile driver, and the depth of the precast tubular pile (1) entering the deep foundation pit (5) is 20 m-30 m, and the bottom of the precast tubular pile (1) is provided with an embedded rod (8).
3. The method for enclosing a foundation pit for extended construction from a deep foundation pit to a shallow foundation pit according to claim 1, wherein the distance between the precast tubular piles (1) in the step S3 is 2 m to 4 m, and the precast tubular piles (1) are PHC tubular piles.
4. The foundation pit bracing method for expanding construction from a deep foundation pit to a shallow foundation pit according to claim 1, wherein the first barb (9) is rectangular in step S3, and an included angle between the first barb (9) and the precast tubular pile (1) is 30-50 degrees.
5. The method for enclosing a foundation pit for extended construction from a deep foundation pit to a shallow foundation pit according to claim 1, wherein the exterior of the precast tubular pile (1) in step S3 is further provided with a second barb (10) of a disc type, and the second barb (10) is provided with at least five groups on the exterior of the precast tubular pile (1).
6. The method for enclosing a foundation pit for extended construction of a deep foundation pit into a shallow foundation pit according to claim 1, wherein the bottom end of the first inserting rod (4) is tapered in step S4, and the first inserting rod (4) is inserted into the deep foundation pit (5) to a depth of at least 3 m or more.
7. The foundation pit bracing method for expanding construction from a deep foundation pit to a shallow foundation pit according to claim 1, wherein a second inserted bar (7) symmetrically penetrates through one side of the supporting and protecting plate (2) in the step S4, one end of the second inserted bar (7) is connected with the connecting disc (6), and the other end of the second inserted bar (7) is inserted into the shallow foundation pit (3).
8. The method for enclosing a foundation pit for expanding construction from a deep foundation pit to a shallow foundation pit according to claim 7, wherein the end of the second inserting rod (7) is arranged in a conical shape, and the second inserting rod (7) is inserted into the shallow foundation pit (3) by at least 2 meters.
9. The foundation pit bracing method for expanding construction from a deep foundation pit to a shallow foundation pit according to claim 1, wherein concrete is poured into the supporting and protecting plate (2) through a concrete pump and a guide pipe in the step S5, so that the supporting and protecting plate (2) forms a protecting pile wall to improve the overall strength.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210856523.0A CN115162355A (en) | 2022-07-21 | 2022-07-21 | Foundation pit enclosure method for expanding construction from deep foundation pit to shallow foundation pit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210856523.0A CN115162355A (en) | 2022-07-21 | 2022-07-21 | Foundation pit enclosure method for expanding construction from deep foundation pit to shallow foundation pit |
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| CN212077965U (en) * | 2020-04-28 | 2020-12-04 | 中铁十二局集团第二工程有限公司 | Deep basal pit excavation inter-pile assembled supporting construction |
| CN112195928A (en) * | 2020-10-09 | 2021-01-08 | 中煤长江生态环境科技有限公司 | Pile plate composite structure for foundation pit support |
| CN215290152U (en) * | 2021-05-19 | 2021-12-24 | 山西工程技术学院 | Novel assembled foundation pit retaining structure |
| CN113585239A (en) * | 2021-09-02 | 2021-11-02 | 中庆建设有限责任公司 | Prestressed anchor pile |
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Application publication date: 20221011 |