富水黏土地层中密贴既有隧道车站施工MJS工法的应用

The Application of MJS Method in the Construction Close to Existing Tunnel Station in Water-Rich Clay Stratum

以新建福州火车站为工程背景,该车站密贴既有隧道,周边环境复杂,管线密布,土层为富水黏土地层。论文分析了该工况条件下选用MJS工法对既有线预加固的原因及必要性,检测结果显示,将水平MJS加固技术运用在富水地层密贴既有线施工中,可以使土体的自稳力得到有效的提升,且能减少对既有线结构的影响。

Taking the new Fuzhou Railway Station as the engineering background,the railway station is closely attached to the existing tunnels,with complex surrounding environment,dense pipelines and rich water clay soil layer.This paper analyzes the reasons and necessity of using MJS method to pre-reinforce the existing line under this working condition,and the test results show that the horizontal MJS reinforcement technology is applied to the construction of closely sticking the existing line in the water-rich stratum,the self-stability of the soil mass can be effectively enhanced,and the influence on the existing line structure can be reduced.