盾构辅助常压开仓技术在南宁地铁隧道中的应用

Auxiliary intervention technology in shield tunneling at atmospheric pressure in the Nanning Subway Tunnel

摘要:

盾构开仓是盾构隧道施工中难以避免的一道工序，结合南宁地铁四号线总部基地站-飞龙路站区间隧道的盾构开仓实践经验，介绍了素桩加降水这一辅助常压开仓技术在南宁地铁隧道中成功应用的实例。在介绍工程应用背景的基础上，详细叙述了辅助开仓方法中素桩及降水施工的技术要点，可为南宁地区盾构开仓方案选择提供指导，也可为类似条件下盾构开仓方案的选择提供借鉴。

Abstract:

Shield intervention is an inevitable process in shield tunnel construction. In reference with the practical experience on shield intervention in the tunnel between Zongbujidi Station and Feilong Road Station of Nanning Subway Line 4, this paper introduces the successful application of auxiliary intervention technology in shield tunneling at atmospheric pressure with the plain pile and dewatering in the Nanning subway. Based on the introduction of the engineering application background, the technical points for plain pile construction and dewatering in the auxiliary intervention method are described in detail, which can provide guidance for the selection of the intervention plan in shield tunneling in the Nanning area, and also provide reference for the selection of the intervention plan in shield tunneling under similar conditions.