地下连续墙施工过程中的变形控制研究

Study on deformation control of diaphragm wall during construction

地下连续墙作为建设深基坑工程和地下构筑物的一项新技术,在水利建筑工程中越来越广泛应用。地下连续墙施工方法就是预先进行成槽开挖,形成一定长度的槽段,在槽段内放入预制好的钢筋笼,并浇筑混凝土形成墙段。实际上,地下连续墙成槽施工也是一系列的开挖和土体扰动过程,必然会产生一定的土体变形与位移。施工中极有可能发生槽段外土体变形过大,甚至引起地面塌陷,当建筑物或管线距槽段较近时,则可能会造成周边管线断裂、建筑物倾斜等严重的不良后果,本文基于引江河二线船闸地下连续墙施工过程进行了研究,不但为本工程的施工提供了指导,提高了地下连续墙的成型质量,并为以后类似工程施工提供借鉴。

As a new technology of the construction of deep foundation pit engineering and underground structure, diaphragm wall is more and more widely used in hydraulic engineering. The construction method of underground continuous wall is to dig into the trench in advance to form a groove with a certain length, and the prefabricated steel bar cage is inserted into the groove section, and the concrete wall is formed by pouring concrete. As a matter of fact, the construction of underground continuous wall is a series of excavation and soil disturbance process, which will produce certain deformation and displacement. The construction is likely soil that the deformation is too large, and even causes the ground collapse. When the building or pipeline from the slot section is close, it may cause adverse consequences around the pipeline fracture, building tilt serious, the rivers and the second ship lock underground continuous wall construction process based on the research, not only provides guidance for the construction of the project, improve the forming quality of underground continuous wall, but also provides reference for future similar project construction.