深厚软粘土区基坑m值反演及变形控制对策研究

RESEARCH ON M-VALUE INVERSION AND DEFORMATION CONTROL COUNTERMEASURES OF FOUNDATION PIT IN DEEP SOFT CLAY AREA

针对绍兴深厚软黏土地区地铁基坑变形较大这一问题,以规范理论框架为基础,通过对工程现场地连墙测斜变形曲线的拟合,探求反演m值与地勘提供m值之间的关系,分析地连墙内力取值及安全评价方法。同时列举了软黏土地区基坑开挖在时空效应利用方面存在的几类问题,以期对后续基坑工程施工提供参考和借鉴。

Aiming at the generally large deformation of subway foundation pits in Shaoxing area with the deep and soft clay,through fitting the deformation curve of the diaphragm wall of the project site,the difference between the inversion m-value and the m-value provided by the geological investigation report and the method of determining the internal force and security evaluation of the diaphragm wall is inferred within the framework of normative theory.At the same time,several types of problems in the use of time and space effects of the construction of the foundation pit with the deep and soft clay are listed in order to provide guidance and reference for construction of subsequent foundation pit.