【作者】 梁飞飞； 梁仁旺； 相兴华；

【Author】 Liang Feifei;Liang Renwang;Xiang Xinghua;College of Architecture and Civil Engineering,Taiyuan University of Technology;

【机构】 太原理工大学建筑与土木工程学院；

【摘要】 本文结合基坑开挖引起沉降的工程实例,利用差分法分析软件FLAC^3D建立基坑开挖的数值模型。分析了基坑开挖过程中,回灌压力、帷幕深度、地下水位及土体模量的改变对基坑周边土体最大沉降量影响和规律。结果表明:1)基坑周边土体地面最大沉降随着回灌压力的增大有减小的趋势,无回灌时地面最大沉降是有回灌时地面最大沉降的2倍左右;2)地面的沉降随着帷幕深度的增加而逐渐减小;3)地下水水位越高即基坑内水位降深越大时,地面的沉降值也越大。4)周边土体的最大沉降值随土体模量的增大而减小;以上结果对今后研究基坑开挖导致的周边土体沉降的问题有一定的参考意义。更多还原

【Abstract】 A numerical model which is based on a project example is developed to analyze the settlement of surrounding soils during the excavation of a deep foundation pit by using FLAC.The influence of excavation on settlement outside the foundation pit is investigated when changing one of the factors which include reinjection pressures、waterproof curtain、water table and soil modulus.The results showe that;1) The settlement of surrounding soils decreases gradually with the increase of reinjection pressures.Moreover,the settlement with reinjection are around two times the value without reinjection.2) The settlement of surrounding soils decreases gradually with the curtain depth increases.3) The settlement of surrounding soils increases gradually with the water table increases.4)The settlement of surrounding soils decreases gradually with the soil modulus increases.The conclusions can be available for future research in similar engineering.更多还原