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隧道建设(中英文) ›› 2011, Vol. 31 ›› Issue (4): 441-446.

• 研究与探索 • 上一篇    下一篇

超深基坑工程周围地表沉降与围护结构稳定控制基准研究

马召林1 ,李竹2 ,杨久坤1   

  1. 1.中铁隧道集团有限公司技术中心,河南 洛阳 471009; 2.天津城投建设有限公司,天津 300381
  • 收稿日期:2011-06-16 出版日期:2011-08-20 发布日期:2011-11-02
  • 作者简介:马召林(1980—),男,山东滕州人,2003年毕业于石家庄铁道学院无机非金属材料专业,本科,工程师,主要从事隧道及地下工程技术管理工作。

Study on Control Standard for Ground Surface Settlement and Retaining Structure Stability Induced by Construction of Super-deep Foundation Pits

MA Zhaolin1,LI Zhu2,YANG Jiukun1   

  1. 1. Technology Center of China Railway Tunnel Group Co., Ltd, Luoyang 471009, Henan, China; 2. Tianjin Urban Investment and Construction Co., Ltd., Tianjin 300381, China
  • Received:2011-06-16 Online:2011-08-20 Published:2011-11-02

摘要:

基坑工程监测的变形控制基准值是设定一个变形值,在其允许的范围之内认为工程是安全的,并对周围环境不产生有害影响,否则认为工程施工将对周围环境产生有害影响,为建立合理的基坑工程监测变形控制基准值,以天津站枢纽超深基坑为研究对象,根据基坑特点与环境控制要求,参照现行相关规范和规程,采用工程类比法和基于监测数据分析,提出了天津站基坑工程控制基准建议,即地表沉降控制基准值建议为30~35 mm,围护结构的水平位移控制基准值建议为60~75 mm,支撑内力和土压力控制基准值建议分别采用0.65f和0.6 ~0.7 f(f为轴力或荷载设计值),研究成果可为类似工程控制基准的制定提供参考。

关键词: 超深基坑, 地表沉降, 围护结构, 控制基准

Abstract:

The control standard of the deformation of foundation pits is a given value. I f the measured value is lower than the above-mentioned given value, it is believed that the project is safe and that no harmful impact will be imposed to the environment; otherwise, it is believed that the construction of the project will do harm to the surrounding environment. The following proposal is made on the control standard of the deformation of the foundation pit of Tianjin Station on basis of the characteristics of the foundation pit and the requirements on the environment control: the proposed control standard for the ground surface settlement is 30~50mm; the proposed control standard for the horizontal displacement of the retaining structure is 60~75mm; the proposed control standard for the internal force of the support is 0.65f and the proposed control standard for the earth pressure is 0.6~0.7f ("f " is the axial force or the designed load value). The study results can provide reference for the determination of the control standard for similar projects in the future.

Key words: super-deep foundation pit, ground surface settlement, retaining structure, control standard