现浇地下连续墙结构预应力筋线形布置及张拉方法研究

Study on the arrangement and tensioning method of prestressed tendons for underground diaphragm wall structure cast in place

针对现有预应力地下连续墙墙体变形控制效果差,预应力筋线形布置缺乏针对性以及需要在墙体顶部进行张拉,施工周期长且难以保证施工质量等问题,本文提供一种新型现浇预应力地下连续墙的布筋型式及张拉方法,不仅能够充分发挥预应力作用的效应,实现地下连续墙的最优变形控制效果,而且施工方便并有利于保证施工质量。

In view of the existing problems such as poor deformation control effect of prestressed underground diaphragm wall structure,lack of pertinence in the linear arrangement of prestressed tendons,prestress tensioning on the top of the wall,long construction period and difficulty in ensuring construction quality,This paper presents a new type of tendon arrangement and tension method for cast-in-place prestressed diaphragm wall.It can not only give full play to the effect of prestress and achieve the optimal deformation control effect of underground diaphragm wall,but also facilitate the construction and guarantee the construction quality.