摘要
通过某深基坑工程的实测数据,系统分析了地连墙的变形规律.分析表明,在深基坑开挖过程中,墙体的侧向位移随着一步开挖深度的增加而增大,且增长的幅度与开挖幅度成正比;基坑拐角处墙体的水平位移较小,但往基坑中部靠近墙体水平位移有增大的趋势,且至基坑中部其值可达最大;基坑开挖过程中,短边墙体受基坑角部空间效应的影响显著,其变形也较小;逆作法施工下,墙体最大位移约出现在基坑开挖深度的一半处,不发生在坑底附近.
Through the testing data of a deep excavation,this paper analyzes systematically the deformation law of the wall.This paper shows that the lateral displacement of the wall increases with the increase of the excavation depth,and the growth rate is proportional to the excavation rate during the process of deep excavation.This paper also shows that the horizontal displacement is smaller in the corner of foundation pit,and the horizontal displacement gradually increases,and then reaches its maximum in the central section of pit.Meanwhile this paper shows that the corner space effect of foundation pit makes impacts on the short side wall significantly and the short side wall has less deformation during the process of deep excavation.Finally this paper shows that the maximum displacement of the wall emerges about half way to excavation depth,rather than at the vicinity of bottom of pit under reverse building method.
出处
《天津城市建设学院学报》
CAS
2010年第4期255-258,共4页
Journal of Tianjin Institute of Urban Construction
关键词
深基坑
地下连续墙
侧向变形
deep foundation pit
underground diaphragm wall
lateral deformation
