摘要
为研究地下连续墙的刚度、基坑被动区加固深度对围护结构的侧向水平位移的影响，运用FLAC^3D对上海市轨道交通10号线国权路站-同济大学站区间下立交基坑开挖进行数值模拟，并对地下连续墙侧向位移实测值进行了分析。综合实测与数值模拟分析的结果表明，数值模拟可以较好地给出连续墙的侧向变形规律；进一步分析数值模拟的结果可得出，与被动区加固的方式相比，通过增加连续墙的厚度减少墙体的侧向位移的效果相对较差，建议上海地区的开挖深度为H时，其被动区加固深度取（0．3～0．5）H。
In order to study the influence of stiffness of diaphragm wall and depth of strengthened soil in passive zone of pit on lateral displacement of supporting structure, a numerical simulation on Guoquan Road station-Tongji University station section under crossing pit excavation of the Shanghai Rail Transit Line No. 10 was performed by using FLAC3D. The measured lateral displacement data of diaphragm wall was also analyzed. The better agreement of measurement data and the numerical simulation shows that the numerical simulation can be used to analyze the actual deformation law of the diaphragm wall. Further analysis of the results of numerieal simulation can be drawn that the effects of inereasing the stiffness of diaphragm wall to reduce lateral displacement are relatively poor in comparison with improving soil in passive zone. The strengthened depth of passive zone soil is suggested between （0.3 - 0.5 ） H in Shanghai.
出处
《结构工程师》
2010年第1期80-86,共7页
Structural Engineers
基金
国家"十一五"科技支撑计划(2008BAJ06B04)
关键词
基坑开挖
数值模拟
被动区加固
地下连续墙刚度
excavation, numerical simulation, strengthened soil in passive zone, stiffness of diaphragm wall
