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Complex foundation pit group supporting system and time-sharing excavation method

A kind of foundation pit group, complex technology, applied in the direction of excavation, foundation structure engineering, sheet pile wall, etc., to reduce disturbance, avoid accidents and prevent groundwater leakage

Active Publication Date: 2022-02-08
NANJING FORESTRY UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]Technical problem to be solved: In order to overcome the deficiency of the existing foundation pit group excavation technology, four adjacent deep and shallow staggered foundations with large area differences and height differences exceeding 15m pit, rationally set the support system and its construction sequence, and divide the excavation sequence between different foundation pits, as well as the excavation stage and area of ​​a single foundation pit, which reduces the disturbance to the ground, avoids dynamic interference between foundation pits, and reduces Reduce the deformation of the foundation pit, improve the economic benefits and speed up the construction progress

Method used

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  • Complex foundation pit group supporting system and time-sharing excavation method
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  • Complex foundation pit group supporting system and time-sharing excavation method

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Embodiment 1

[0031] Nanjing Jiangbei New District Underground Space Phase I Project, the project is bounded by Wanshou Road and the planned road on the west side of Wanshou Road in the west, planned road in the north side of Dingshan Avenue in the north, Shengli Road in the east and planned road in the west of Shengli Road in the east, and Business West Street and Business Street in the south. The planned road on the north side of West Street has a total land area of ​​48 hectares, with a total of 24 plots in the area, 21 plots of planned commercial land, and 3 plots of square green space. The minimum excavation depth of the foundation pit group is about 15m, and the maximum depth is about 44m. The total construction area is about 1.2 million square meters, and its functions include commerce, underground loop, municipal pipe gallery, rail transit, parking, equipment room, etc. The stratum from top to bottom is artificial fill, silty clay, silty silty clay, silty silty clay with clay, silty ...

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Abstract

The invention discloses a complex foundation pit group supporting system and a time-division excavation method.The complex foundation pit group supporting system comprises a complex foundation pit group, a foundation pit group enclosure system, a dewatering system, a vertical supporting system and a horizontal supporting system.The time-division excavation method comprises the following steps that firstly, an east partition small foundation pit is excavated; meanwhile, enclosure systems and vertical supporting systems of other large foundation pits are constructed; after the east-side partitioned small foundation pit basement structure is completed, the east-side large foundation pit is divided into three land parcels to be excavated; after first-layer supporting of land parcels on the two sides of the east-side large foundation pit is completed, the west-side large foundation pit is excavated; and after the two large foundation pit basement structures are completed, the middle long and narrow subway deep foundation pit is excavated. According to the system and the time-sequence-divided excavation method, through the supporting system and excavation time sequence division, stratum disturbance is effectively reduced, dynamic interference between the foundation pits is avoided, deformation of the foundation pits is reduced, economic benefits are improved, the construction progress is accelerated, and the foundation pit group construction method is safe and efficient.

Description

technical field [0001] The invention belongs to the field of underground space development and construction, in particular to a complex foundation pit group support system and a time-sequential excavation method. Background technique [0002] With the continuous expansion of the scale of underground space construction in my country, the construction of subways and comprehensive utility corridors has become more and more common, which has produced significant economic and social benefits. The integrated development and utilization of urban underground space ensures the connectivity between the three-dimensional projects of urban construction, the rapid coordination of underground space and above-ground space, and the scientific matching of underground space and ground facilities, which greatly reduces the cost of subway construction, comprehensive pipe gallery construction and Other municipal infrastructure space settings and contradictions between high-rise buildings. [00...

Claims

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Application Information

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IPC IPC(8): E02D17/02E02D17/04E02D5/46E02D19/18E02D19/10E02D5/36E02D5/18
CPCE02D17/02E02D17/04E02D5/46E02D19/18E02D19/10E02D5/36E02D5/18E02D2250/0023E02D2300/002
Inventor 杨平陶勇吕所章张婷汤巧云朱伟李平王晓觅
Owner NANJING FORESTRY UNIV
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