CN113585287A - Support structure for combined construction of vertical shaft and foundation pit in TOD mode and construction method - Google Patents
Support structure for combined construction of vertical shaft and foundation pit in TOD mode and construction method Download PDFInfo
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- CN113585287A CN113585287A CN202110979215.2A CN202110979215A CN113585287A CN 113585287 A CN113585287 A CN 113585287A CN 202110979215 A CN202110979215 A CN 202110979215A CN 113585287 A CN113585287 A CN 113585287A
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- foundation pit
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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
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/06—Foundation trenches ditches or narrow shafts
- E02D17/08—Bordering or stiffening the sides of ditches trenches or narrow shafts for foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
- E02D29/125—Manhole shafts; Other inspection or access chambers; Accessories therefor characterised by the lining of the shaft
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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
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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
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- Engineering & Computer Science (AREA)
- Structural Engineering (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)
- Environmental & Geological Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention provides a supporting structure and a construction method for combined construction and separate use of a vertical shaft and a foundation pit in a TOD (time of day) mode, wherein the supporting structure comprises a foundation pit supporting structure, a vertical shaft supporting structure, a front row of isolation piles, a rear row of reinforcing piles and a connecting beam; the foundation pit is adjacent to the vertical shaft, a foundation pit supporting structure is arranged along the side wall of the foundation pit, a front row of isolation piles are arranged on the side wall of the foundation pit, which is positioned on the front side of the vertical shaft and adjacent to the vertical shaft, and the front row of isolation piles are positioned between the foundation pit and the vertical shaft; a vertical shaft supporting structure is arranged in the vertical shaft, a rear row of reinforcing piles are arranged on the rear side of the vertical shaft, and a plurality of anchor cables are arranged on one side, close to the rear row of reinforcing piles, of the vertical shaft supporting structure in a driving mode; the front row of isolation piles and the rear row of reinforcing piles are connected through connecting beams. The shaft supporting structure and the foundation pit supporting structure are organically combined, the respective supporting structures are perfect and independent on the basis of combined construction, independent excavation is facilitated, the supporting structures are used respectively and do not influence each other, meanwhile, the adjacent parts form double rows of piles through the front row of piles, the rear row of piles and the connecting beams to strengthen the deformation control capability of the foundation pit, and the safety of the foundation pit is ensured.
Description
Technical Field
The invention belongs to the technical field of constructional engineering, and particularly relates to a supporting structure for combined construction of a vertical shaft and a foundation pit in a TOD mode and a construction method.
Background
With the development of social economy and city construction, subway wire nets are gradually dense and gradually form a TOD construction mode of station-city fusion. The TOD model is a traffic-oriented development (TOD) which is a non-automotive planning and design approach to maximize the use of public traffic when planning a residential area or a commercial area. In a new construction mode, the distance between a subway station and a city development building is shortened, and the mutual restriction and influence among foundation pits are bound to be caused by the traditional method. The vertical shaft provides a hole entering condition for the underground excavation project and is used as a passage for unearthing, air supply, equipment transportation, personnel access and the like; a foundation pit is a space excavated from the ground downward for constructing the underground portion of a building. At present, the problems of serious mutual interference between the vertical shaft and the adjacent engineering of the foundation pit, complex engineering and organization, difficult coordination, long construction period and high construction cost exist. Under the TOD construction mode, how to solve the adjacent engineering supporting scheme of foundation pit, guarantee foundation pit safety, optimize engineering project, the reduction of erection time is the key of success or failure of the TOD construction mode.
Disclosure of Invention
In order to solve the technical problems, the invention provides a supporting structure for combined construction of a vertical shaft and a foundation pit in a TOD mode and a construction method, wherein the supporting structure of the vertical shaft and the supporting structure of the foundation pit are organically combined, the perfection and independence of the respective supporting structures are realized on the basis of combined construction, independent excavation and separate use are facilitated, and mutual influence is avoided, and meanwhile, the deformation control capability of a double-row pile reinforced foundation pit is formed at adjacent parts through a front row of isolation piles, a rear row of reinforcing piles and connecting beams, so that the safety of the foundation pit is ensured.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the invention provides a supporting structure for combined construction of a vertical shaft and a foundation pit in a TOD mode, which comprises a foundation pit supporting structure, a vertical shaft supporting structure, a front row of isolation piles, a rear row of reinforcing piles and a connecting beam; the foundation pit is adjacent to the vertical shaft, and a foundation pit supporting structure is arranged along the side wall of the foundation pit, wherein a front row of isolation piles are arranged on the side wall of the foundation pit, which is positioned on the front side of the vertical shaft and adjacent to the vertical shaft, and the front row of isolation piles are positioned between the foundation pit and the vertical shaft; a vertical shaft supporting structure is arranged in the vertical shaft, a rear row of reinforcing piles are arranged on the rear side of the vertical shaft, and a plurality of anchor cables are arranged on one side, close to the rear row of reinforcing piles, of the vertical shaft supporting structure in a driving mode; the front row of isolation piles and the rear row of reinforcing piles are connected through connecting beams.
Preferably, the foundation pit supporting structure comprises fender piles, crown beams and foundation pit anchor cables, wherein the lower portions of the fender piles are arranged at the bottoms of foundation pit holes, the crown beams are arranged at the tops of the fender piles, and a plurality of foundation pit anchor cables are arranged on the fender piles in a driving mode.
Preferably, the shaft wellhead is provided with a locking ring, and the locking ring is reliably connected with the crown beam.
Preferably, the vertical shaft supporting structure comprises a primary support shaft wall and a small guide pipe, and the primary support shaft wall is connected with the small guide pipe.
In a second aspect, the invention further provides a construction method of a supporting structure for combined construction of a vertical shaft and a foundation pit in a TOD mode, wherein the method comprises the following steps:
step S1, constructing a foundation pit supporting structure: foundation pit fender piles, crown beams and foundation pit anchor cables; constructing a front row of isolation piles and a rear row of reinforcing piles;
step S2, constructing a locking collar of the vertical shaft, wherein the locking collar is reliably connected with the crown beam, and meanwhile, constructing a connecting beam;
and step S3, excavating the vertical shaft by adopting an inverted well wall method, constructing a vertical shaft supporting structure and an anchor cable along with the excavated vertical shaft, and excavating the foundation pit in the vertical shaft excavation period or at any time after the vertical shaft excavation is finished according to the overall engineering project planning and construction organization.
The invention has the following beneficial effects:
according to the support structure and the construction method for combined construction of the vertical shaft and the foundation pit under the TOD mode, which are provided by the invention, the foundation pit support structure is used as a foundation pit soil retaining member to control the deformation of the foundation pit and ensure the excavation safety of the foundation pit. The front row isolation piles are used as physical boundaries of the vertical shaft and the foundation pit, so that the two structures are mutually independent, the effect that the vertical shaft and the foundation pit can be used after being built in a combined mode is achieved, and meanwhile the front row isolation piles can be used as a waterproof curtain when the water inlet depth of the vertical shaft and the foundation pit is different. The back row reinforced piles and the anchor cables form a soil retaining structure to resist the pressure of side soil of the foundation pit, and are connected with the front row piles through the connecting beams to form a double-row pile supporting structure to increase the overall rigidity and strength of the structure, and the connecting beams can avoid the arrangement of a shaft lifting use area.
The foundation pit supporting structure and the shaft supporting structure are mutually independent, the perfection and independence of respective supporting structures are realized, the front row of isolation piles, the rear row of reinforcing piles and the connecting beams are arranged at positions adjacent to the foundation pit, a double-row pile stress system is formed, the two independent supporting structures are mutually connected, the integral reinforcement of the two foundation pits is realized, the foundation of combined construction is guaranteed, the two foundation pits can be independently excavated and respectively used, the process organization is flexible, and the construction safety is guaranteed.
The shaft supporting structure and the foundation pit supporting structure are organically combined, the supporting structures are perfect and independent on the basis of combined construction, combined construction and independent excavation are facilitated, the supporting structures are used respectively and do not affect each other, meanwhile, the adjacent parts form a double-row supporting structure through the front row of isolation piles, the rear row of reinforcing piles and the connecting beams, the deformation control capability of the foundation pit is enhanced, and the excavation safety of the two structures is ensured.
The invention realizes that the vertical shaft and the foundation pit are independently excavated and respectively used on the basis of ensuring the combined construction of the vertical shaft and the foundation pit, so that the mutual interference is less, the process organization is flexible, the construction period is greatly shortened, and the construction safety is ensured. The problems that the adjacent projects of the vertical shaft and the foundation pit cannot be simultaneously operated in a TOD construction mode, the construction period is long, the construction organization is complex, the construction cost is high and the like are effectively solved. Meanwhile, the problems that deformation of the foundation pit (or a built structure) in the early stage and internal force influence are large due to subsequent foundation pit excavation are solved. Aiming at the project of the proximity of the vertical shaft and the foundation pit, the vertical shaft supporting structure and the foundation pit supporting structure are organically combined, the perfection and independence of the respective supporting structures are realized on the basis of combined construction, the independent excavation is convenient, the vertical shaft supporting structure and the foundation pit supporting structure are respectively used and do not influence each other, meanwhile, the adjacent parts form double-row pile reinforced foundation pit deformation control capacity through the front row of isolation piles, the rear row of reinforcing piles and the connecting beams, and the safety of the foundation pit is ensured. The invention is suitable for all foundation pit adjacent projects and has wide application range.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description are only some embodiments of the present invention.
Fig. 1 is a schematic plan view of a supporting structure for combined construction of a shaft and a foundation pit in a TOD mode according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of a support structure for combined construction of a shaft and a foundation pit in the TOD mode according to an embodiment of the present invention.
Description of reference numerals:
1. a foundation pit supporting structure; 2. a shaft support structure; 3. front row of isolation piles; 4. back row reinforcing piles; 5. connecting the beams; 6. foundation pit anchor cables; 7. an anchor cable; 100. a foundation pit; 200. and (4) a shaft.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The embodiment provides a supporting structure for combined construction of a shaft and a foundation pit in a TOD mode, and as shown in fig. 1 and 2, the supporting structure comprises a foundation pit supporting structure 1, a shaft supporting structure 2, a front row of isolation piles 3, a rear row of reinforcing piles 4 and a connecting beam 5; the foundation pit 100 is adjacent to the vertical shaft 200, a foundation pit supporting structure 1 is arranged along the side wall of the foundation pit 100, wherein the side wall of the foundation pit 100, which is positioned at the front side of the vertical shaft 200 and adjacent to the vertical shaft 200, is provided with a front row of isolation piles 3, the front row of isolation piles 3 are positioned between the foundation pit 100 and the vertical shaft 200 and are physical boundaries of the vertical shaft 200 and the foundation pit 100; a vertical shaft supporting structure 2 is arranged in the vertical shaft 200, a rear row of reinforcing piles 4 are arranged on the rear side of the vertical shaft 200, a plurality of anchor cables 7 are arranged on one side, close to the rear row of reinforcing piles 4, of the vertical shaft supporting structure 2 in a driving mode, the rear row of reinforcing piles 4 and the anchor cables 7 form a soil retaining structure, and the soil pressure on the side of a foundation pit is resisted; the front row of isolation piles 3 and the rear row of reinforcement piles 4 are connected through connecting beams 5.
Foundation pit supporting construction 1 includes fender pile, guan liang, foundation ditch anchor rope 6, the fender pile lower part sets up in the foundation ditch hole end, and the fender pile top is provided with guan liang, it is equipped with a plurality of foundation ditch anchor ropes 6 to beat on the fender pile. And the shaft mouth of the vertical shaft is provided with a locking mouth ring, and the locking mouth ring is reliably connected with the crown beam. The vertical shaft supporting structure 2 comprises a primary shaft wall and a small guide pipe, and the primary shaft wall is connected with the small guide pipe. The depth of the foundation pit 100 and the depth of the vertical pit 200 can be the same or different, the front row isolation piles 3 are used as physical boundaries of the vertical pit 200 and the foundation pit 100, so that the two structures are mutually independent, the effect that the vertical pit 200 and the foundation pit 100 can be used after being built in a combined mode is achieved, and meanwhile, the front row isolation piles 3 can be used as a waterproof curtain when the water entry depth of the vertical pit 200 and the water entry depth of the foundation pit 100 are different.
The embodiment also provides a construction method of the supporting structure for combined construction of the vertical shaft and the foundation pit in the TOD mode, which comprises the following steps:
step S1, constructing a foundation pit supporting structure 1: foundation pit fender piles, crown beams and foundation pit anchor cables; constructing a front row of isolation piles 3 and a rear row of reinforcing piles 4;
step S2, constructing a locking collar of the shaft 200, wherein the locking collar is reliably connected with the crown beam, and constructing a connecting beam 5 at the same time;
step S3, the shaft 200 is excavated by adopting an inverted shaft wall method, the shaft supporting structure 2 and the anchor cable 7 are constructed along with the shaft 200, and the foundation pit 100 can be excavated during the excavation of the shaft 200 or at any time after the completion of the shaft excavation according to the overall engineering project planning and construction organization.
The foundation pit supporting structure 1 can control the deformation of the foundation pit as a foundation pit soil retaining component, and the safety of foundation pit excavation is guaranteed. Front row keeps apart stake 3 as the physical demarcation of shaft and foundation ditch for two structures are independent each other, have realized the shaft and have built the effect that can use after the foundation ditch is built jointly, and front row keeps apart stake 3 simultaneously and can regard as the stagnant water curtain when the shaft is different with the foundation ditch depth of entry. The back row of reinforced piles 4 and the anchor cables 7 form a soil retaining structure to resist the pressure of side soil of a foundation pit, and are connected with the front row of piles through the connecting beams to form a double-row pile supporting structure to increase the overall rigidity and strength of the structure, and the connecting beams 5 can avoid the arrangement of a shaft lifting use area.
The foundation pit supporting structure 1 and the shaft supporting structure 2 are mutually independent, the perfection and independence of respective supporting structures are realized, the front row isolation piles 3, the rear row reinforcing piles 4 and the connecting beams 5 are arranged at positions adjacent to the foundation pits, a double-row pile stress system is formed, the two independent supporting structures are mutually connected, the integral reinforcement of the two foundation pits is realized, the foundation pit supporting structure can be independently excavated and respectively used on the basis of ensuring the co-construction, the process organization is flexible, and the construction safety is ensured.
The shaft supporting structure 1 and the foundation pit supporting structure 2 are organically combined, the respective supporting structures are perfect and independent on the basis of combined construction, combined construction and independent excavation are facilitated, the supporting structures are used respectively and do not affect each other, meanwhile, the adjacent parts form a double-row supporting structure through the front-row isolation piles 3, the rear-row reinforcing piles 4 and the connecting beams 5, the deformation control capability of the foundation pit is enhanced, and the excavation safety of the two structures is ensured.
According to the technical scheme, the supporting structure and the construction method for combined construction and separate use of the vertical shaft and the foundation pit in the TOD mode have the advantages that on the basis of ensuring combined construction of the vertical shaft and the foundation pit, the vertical shaft and the foundation pit are independently excavated and respectively used, mutual interference is few, the process organization is flexible, the construction period is greatly shortened, and meanwhile construction safety is ensured. The problems that the adjacent projects of the vertical shaft and the foundation pit cannot be simultaneously operated in a TOD construction mode, the construction period is long, the construction organization is complex, the construction cost is high and the like are effectively solved. Meanwhile, the problems that deformation of the foundation pit (or a built structure) in the early stage and internal force influence are large due to subsequent foundation pit excavation are solved. Aiming at the project of the proximity of the vertical shaft and the foundation pit, the vertical shaft supporting structure and the foundation pit supporting structure are organically combined, the perfection and independence of the respective supporting structures are realized on the basis of combined construction, the independent excavation is convenient, the vertical shaft supporting structure and the foundation pit supporting structure are respectively used and do not influence each other, meanwhile, the adjacent parts form double-row pile reinforced foundation pit deformation control capacity through the front row of isolation piles, the rear row of reinforcing piles and the connecting beams, and the safety of the foundation pit is ensured. The invention is suitable for all foundation pit adjacent projects and has wide application range.
The embodiments of the present invention have been described in detail through the embodiments, but the description is only exemplary of the embodiments of the present invention and should not be construed as limiting the scope of the embodiments of the present invention. The scope of protection of the embodiments of the invention is defined by the claims. In the present invention, the technical solutions described in the embodiments of the present invention or those skilled in the art, based on the teachings of the embodiments of the present invention, design similar technical solutions to achieve the above technical effects within the spirit and the protection scope of the embodiments of the present invention, or equivalent changes and modifications made to the application scope, etc., should still fall within the protection scope covered by the patent of the embodiments of the present invention.
Claims (5)
1. A supporting structure for combined construction of a vertical shaft and a foundation pit in a TOD mode is characterized by comprising a foundation pit supporting structure, a vertical shaft supporting structure, a front row of isolation piles, a rear row of reinforcing piles and a connecting beam; the foundation pit is adjacent to the vertical shaft, and a foundation pit supporting structure is arranged along the side wall of the foundation pit, wherein a front row of isolation piles are arranged on the side wall of the foundation pit, which is positioned on the front side of the vertical shaft and adjacent to the vertical shaft, and the front row of isolation piles are positioned between the foundation pit and the vertical shaft; a vertical shaft supporting structure is arranged in the vertical shaft, a rear row of reinforcing piles are arranged on the rear side of the vertical shaft, and a plurality of anchor cables are arranged on one side, close to the rear row of reinforcing piles, of the vertical shaft supporting structure in a driving mode; the front row of isolation piles and the rear row of reinforcing piles are connected through connecting beams.
2. The support structure for shaft and foundation pit combined construction in TOD mode of claim 1, wherein the support structure for foundation pit comprises fender post, crown beam and foundation pit anchor cable, the lower part of the fender post is arranged at the bottom of the foundation pit, the top of the fender post is provided with the crown beam, and the fender post is provided with a plurality of foundation pit anchor cables.
3. The support structure for shaft and foundation pit combined construction in TOD mode according to claim 2, wherein the shaft well head is provided with a locking ring, and the locking ring is reliably connected with the crown beam.
4. The support structure for combined construction of the shaft and the foundation pit in the TOD mode according to claim 1, wherein the support structure for the shaft comprises a primary shaft wall and a small guide pipe, and the primary shaft wall is connected with the small guide pipe.
5. A construction method of a supporting structure for combined construction of a vertical shaft and a foundation pit in a TOD mode is characterized by comprising the following steps:
step S1, constructing a foundation pit supporting structure: foundation pit fender piles, crown beams and foundation pit anchor cables; constructing a front row of isolation piles and a rear row of reinforcing piles;
step S2, constructing a locking collar of the vertical shaft, wherein the locking collar is reliably connected with the crown beam, and meanwhile, constructing a connecting beam;
and step S3, excavating the vertical shaft by adopting an inverted well wall method, constructing a vertical shaft supporting structure and an anchor cable along with the excavated vertical shaft, and excavating the foundation pit in the vertical shaft excavation period or at any time after the vertical shaft excavation is finished according to the overall engineering project planning and construction organization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110979215.2A CN113585287B (en) | 2021-08-25 | 2021-08-25 | Construction method of supporting structure for combined construction and separation of vertical shaft and foundation pit in TOD mode |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110979215.2A CN113585287B (en) | 2021-08-25 | 2021-08-25 | Construction method of supporting structure for combined construction and separation of vertical shaft and foundation pit in TOD mode |
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| CN113585287A true CN113585287A (en) | 2021-11-02 |
| CN113585287B CN113585287B (en) | 2022-08-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115821937A (en) * | 2022-09-08 | 2023-03-21 | 北京建工土木工程有限公司 | Combined reinforcement method for foundation pit adjacent unstable shaft |
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| CN110644505A (en) * | 2019-09-11 | 2020-01-03 | 上海市基础工程集团有限公司 | Rapid soil taking system and method for ultra-deep shaft foundation pit construction |
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2021
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| JPH08189030A (en) * | 1995-01-10 | 1996-07-23 | Tenox Corp | Method for constructing self-supporting earth-retaining wall |
| CN206512723U (en) * | 2017-02-27 | 2017-09-22 | 钱亮 | A kind of multiple-layer horizontal coupling beam double-row pile and underground pipe gallery monolithic construction |
| CN107654234A (en) * | 2017-07-24 | 2018-02-02 | 广州地铁设计研究院有限公司 | A kind of construction method of subway tunnel crossing subway station diaphram wall |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115821937A (en) * | 2022-09-08 | 2023-03-21 | 北京建工土木工程有限公司 | Combined reinforcement method for foundation pit adjacent unstable shaft |
| CN115821937B (en) * | 2022-09-08 | 2024-03-12 | 北京建工土木工程有限公司 | Combined reinforcement method for foundation pit adjacent to unstable vertical shaft |
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| CN113585287B (en) | 2022-08-02 |
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