山西中南部铁路通道重载铁路隧道隧底加固方案研究  

Study on reinforcing scheme of heavy haul railway tunnel's foundation on Shanxi-Henan-Shandong railway thoroughfare

作　　者：肖凯刚[1] 

机构地区：[1]中铁第四勘察设计院集团有限公司,湖北武汉430063

出　　处：《铁道建筑》2014年第12期43-46,共4页Railway Engineering

摘　　要：山西中南部铁路通道将开行30 t轴重列车,荷载计算与有限元数值分析表明,列车轴重增加后位于富水软弱围岩及土质地层段隧道基底应力增大,在列车活载反复作用下隧道底部易形成病害。本文论述了对已先期建成的隧道进行基底加固的必要性,论证了采用隧底注浆方案进行基底加固合理可行。Heavy haul train with an axle load of 30 t will be put into service at the Shanxi-Henan-Shandong railway thoroughfare. T he results of loading calculation and finite element analysis indicate at water-rich area with weak surrounding rocks and soil,such axle load may increase the strain of the tunnel foundation. U nder such conditions, tunnel defaults may occur under the train live load. T he paper elaborates the necessities in the reinforcement of pre-inforced tunnel and proposes that grouting approach is to be used to resolve the concern.

关 键 词：重载铁路 列车活载 隧底加固 注浆 

分 类 号：U457.3[建筑科学—桥梁与隧道工程]