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  

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

作　　者：马召林[1] 李竹[2] 杨久坤[1] 

机构地区：[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

出　　处：《隧道建设》2011年第4期441-446,469,共7页Tunnel Construction

摘　　要：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65%f和60%～70%f(f为轴力或荷载设计值),以期为类似工程控制基准的制定提供参考。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 65%f and the proposed control standard for the earth pressure is 60%~70%f（＂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.

关 键 词：超深基坑 地表沉降 围护结构 控制基准 

分 类 号：U451[建筑科学—桥梁与隧道工程]