软土基坑周围地表沉降估算

随着地下空间开发利用规模的加大,基坑工程的数量越来越多,基坑工程问题也越来越多,因此在软土地区由基坑开挖引起的地表沉降越来越受到人们的重视.本文通过上海地区基坑工程实例,在分析总结基坑周围地表沉降变形计算方法的基础上,采用Peck法按指数曲线拟合得出基坑周围地表沉降变形,同时将支护结构变形诱发的地表沉降与实测沉降进行比较.结果表明,该法对基坑周围地表沉降的预测和周围环境的损害预防具有一定的实用性和可靠性,对以后的工程有一定的借鉴意义.

Estimation of Ground Settlement Aroused by Soft Soil Excavation

With the development of underground space exploitation , excavations and excavation problem-sare becoming more and more , and the ground settlement which caused by the deflection of the supporting system during excavation has been paid much attention .Based on analyzing and summarizing the method to calculate the ground settlement around the soft soil excavation , this paper has calculated the circumferential ground settlement deformation as Peck method , which is fitted in terms of exponential curves .The proposed method was verified by comparing the predictive results with the measured data of two excavations in Shanghai , which proves to be a practical method for estimating ground settlement aroused by soft soil excavation and it can be a guidance to the similar engineering .