上跨地铁保护段MJS法和管幕法土体加固技术研究

Research on Soil Reinforcement Technology with MJS Method and Pipe-Screen Method in Metro Upper Span Protected Section

涉地铁段施工由于基础施工造成的土体扰动以及机械振动会使土体的应力状态发生改变,威胁地铁的安全,一旦由于施工造成地铁隧道管片渗漏等危险,应立即采取相应的应急救援措施。本文以徐州新城区彭祖大道道路工程Pm18、Pm19、Pm20段处上跨地铁2号线位置地道为例,对上跨地铁保护段采用的MJS旋喷桩法和管幕法土体加固进行技术研究。

The soil disturbance and mechanical vibration caused by the construction of the subway section will change the stress state of the soil and threaten the safety of the subway.Once the subway tunnel segment leakage and other dangers are caused by the construction,the corresponding measures should be taken immediately.In this paper,taking the position of Pm18,Pm19,and Pm20 sections of Pengzu Avenue Road Project in Xuzhou New City across Metro Line 2 as an example,the MJS rotary grouting pile method and the tube-screen method used in the protection section of the upper-span subway are studied for soil reinforcement.