某地下商业街工程半逆作法施工技术

Semi-reversed Construction Method of an Underground Commercial Street

沈阳某地下商业街工程采用先施作边桩护壁及顶板,然后逆作施工墙柱及底板的半逆作法。结合该工程的难点,详细介绍了施工工序和施工方法,并总结了该工程半逆作法施工的优、缺点。半逆作法施工技术的应用,有效地保护了地下盾构隧道及地铁运营,缩短了恢复交通工期,取得了良好的社会效益和经济效益。

An underground commercial street in Shenyang adopted a semi-reversed construction method, i.e. the boundary pile wall protection and roof plate were constructed first and the wall columns and bottom plates was constructed with the top-down method. With respect to the construction difficulties of this project, the corresponding construction process and construction method are presented in detail in this paper. The advantages and disadvantages of the semi-reversed construction method were summarized. Application of the semi-reversed construction technology effectively protected the normal operation of the underground shield tunnel and metro, shortened the time of traffic interruption, and obtained obvious social and economic benefits.