|Table of Contents|

Design and Practice of Partitioning of Deep Large Foundation Pits Under Complex Environment Conditions(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2021年06期
Page:
119-127
Research Field:
软土基坑设计与变形控制
Publishing date:

Info

Title:
Design and Practice of Partitioning of Deep Large Foundation Pits Under Complex Environment Conditions
Author(s):
HOU Sheng-nan12 YUE Jian-yong12 ZHOU Yan12
(1. Shanghai Underground Space Engineering Design & Research Institute, East China Architecture Design & Research Institute Co., Ltd., Shanghai 200011, China; 2. Shanghai Engineering Research Center of Safety Control for Facilities Adjacent to Deep Excavations, Shanghai 200011, China)
Keywords:
deep large foundation pit partitioning implementation environmental influence sports building
PACS:
TU973.2
DOI:
10.19815/j.jace.2021.09041
Abstract:
In order to reduce the influence of large-scale soil unloading on the surrounding environment and strengthen the protection of the surrounding complex environment, the deep foundation pit of Shanghai Xujiahui Sports Park was reasonably designed. Based on fully considering the characteristics of metro, overpass and pipeline near foundation pit, and the complex environment of the internal and surrounding buildings of the foundation pit, the design scheme of supporting structure of foundation pit with “partitioning parallel operation + plate support + multi-strut + reasonable support change” was adopted. The design ideas and specific practices of the partitioning implementation of the foundation pit, the layout of the support and trestle, and the temporary isolation and support replacement were introduced in detail, and the rationality of the partitioning implementation of the foundation pit was analyzed through the on-site deformation monitoring. The results show that the maximum settlement deformation of the East Asian Building is about 6 mm after the baseplate completed, and the differential settlement is about 1 mm. The maximum settlement of Shanghai Stadium is about 8 mm, and the maximum differential settlement is about 2 mm. The settlement of the Shanghai Stadium transformer substation increases by about 4 mm, and the differential settlement is less than 1 mm. During the construction, although the settlements of the Shanghai Stadium transformer substation and cable tunnel increase a little, but the deformation is in the controllable range, which is far less than settlement control criterion proposed by the Shanghai Shentong Metro Group, ensuring the normal operation of the whole subway system. Reasonable partitioning implementation and technical measures can ensure the safety of foundation pit and the surrounding environment, which can provide a reference for the relevant engineering design and practice.

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Last Update: 2021-11-01