摘要
基于4种不同的围护结构基本变形模式,对上海地区典型土层分布状况进行了多种工况下的基坑开挖数值模拟计算。计算结果发现,在4种不同的围护结构基本变形模式下,墙后最大沉降量和基坑围护结构最大侧向位移之间呈线性关系,墙后的地面沉降曲线呈明显的正态函数分布,并可拟合得到其正态函数曲线表达式。在此基础上,提出了基于围护结构变形模式的地面沉降估算方法。工程实例验证表明,该方法具有一定的实用性和可靠性,不失为一种方便实用的估算基坑开挖引起墙后地面沉降的方法。
Based on four basic deformation modes of retaining structures,numerical simulations and calculations are carried out on deep excavations with typical soil layer distribution in Shanghai.The results show that the maximum ground settlement has a linear relationship with the maximum lateral wall deflection in the four basic deformation modes of the retaining structures.At the same time,the settlement curve shows a normal function distribution,and normal function expressions are obtained by fitting.Then,on this basis,an estimation method is proposed based on the four basic deformation modes of the retaining structures.The feasibility and reliability of the method is verified by two engineering examples and it proves to be a practical method for estimating ground settlement aroused by deep excavation.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2010年第12期1821-1828,共8页
Chinese Journal of Geotechnical Engineering
关键词
基坑开挖
基坑变形
地面沉降
变形计算
excavation
pit deformation
ground settlement
deformation calculation
