江中超深基坑与围堰相互作用的分析与研究

某软土超深基坑位于江中,开挖深度达41 m,居国内软土基坑前列。该基坑的显著工程特点是基坑与作为挡水结构的围堰紧邻布置,围堰挡水水头较高,基坑与围堰的相互作用对二者的内力和变形产生很大的影响,是设计必须考虑的关键技术难题。本文应用通用有限元分析软件ANSYS对基坑与围堰进行了共同作用下的平面和空间有限元施工仿真计算,根据计算结果对二者的相互影响进行了分析,从而为工程设计提供了参考。

Researches on interaction between exceeding deep footing groove in rivers and cofferdam

An exceeding deep footing groove with an excavation depth of 41 m is located in a river and is one of the deepest footing grooves on soft soil area in China.It is close to a cofferdam whose water head is comparatively high and the interaction between footing groove and cofferdam may greatly affect their internal forces and deformations.Thus the correct analysis on the interaction becomes one of the key technical problems.A finite element simulation analysis was employed to study the coupling between footing groove and cofferdam by using ANSYS FEA software.The calculated results will provide instructive guide for the design and construction.