软土基坑坑外加固对基坑变形的影响分析  

RESEARCH ON EXCAVATION DEFORMATION CAUSED BY SOIL REINFORCEMENT OUTSIDE EXCAVATION IN SOFT SOIL

作　　者：胡承军[1] 

机构地区：[1]华润置地(上海)有限公司,上海200092

出　　处：《建筑技术》2009年第2期136-137,140,共3页Architecture Technology

摘　　要：在软土基坑施工过程中,由于地铁盾构进出洞以及为了保护基坑周围建筑物等原因,常常会进行坑外加固。坑外加固能提高土体强度,也会对基坑变形产生影响。结合上海地铁某车站端头井加固的工程实例,分析坑外加固对基坑变形造成的不利影响,并在此基础上提出减少坑外加固影响的控制措施。During the construction of excavation in soft soil, soil reinforcement outside the excavation is used usually in order to protect the departure and reception of shield and surrounding buildings. Soil reinforcement outside the excavation will improve the strength of soil and affect excavation deformation. Combined with an project example of one Metro station in Shanghai, this paper analyzes the negative influence induced by excavation deformation caused by soil reinforcement outside the excavation. Basing on the analysis, this paper also brings forward some control measures in redueing the effects of soil reinforcement outside the excavation. Also these valuable measures will benefit the following similar projects.

关 键 词：坑外加固 挤土效应 基坑位移 

分 类 号：TU473.5[建筑科学—结构工程]