南宁市轨道交通5号线一期地铁隧道主要岩土工程问题

Main Geotechnical Engineering Problems of First Phase Subway Tunnel of Nanning Rail Transit Line 5

南宁市轨道交通5号线一期位于南宁市的侵蚀堆积河谷阶地区,地铁隧道穿越邕江低阶地亚区和邕江高阶地亚区,沿线地质条件变化较大,地铁隧道施工、运营会遭遇到不同的岩土工程问题。通过对南宁市轨道交通5号线一期沿线地层结构条件、设计方案的分析,将沿线地层划分为5种地层组合结构类型,并就可能会面临的各种岩土工程问题进行了分析探讨,旨在为保证地铁隧道盾构顺利施工、运营安全提供专业的技术依据。

The first phase of Nanning rail transit line 5 is located in the eroded and accumulated valley terrace area of Nanning city.The subway tunnel passes through the low terrace sub-area and the high terrace sub-area of Yongjiang river.The geological conditions along the line vary greatly,and the construction and operation of metro tunnel will encounter different geotechnical engineering problems.Based on analysis on the stratum structure condition and design scheme of the first phase of Nanning rail transit line 5,the strata along the line are divided into five types of stratum combination structures,and various possible geotechnical engineering problems are analyzed and discussed in order to provide professional technical basis for smooth construction and operation safety of metro tunnel shield.