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    • 城市地铁双护盾TBM穿越碎裂石断层加固范围 及施工关键技术研究

    Gang CHEN,Liming WANG,Jianjun ZHOU,Bing ZHANG,Hongbo Li

    Journal of Water Resources and Architectural Engineering（2019）

    Cited 4|Views5
    Abstract
    为解决城市地铁双护盾TBM穿越断层破碎带时掌子面坍塌、卡机等施工难题,利用数值模拟软件模拟碎裂石断层加固与否及管片和围岩位移变化规律,确定隧道纵径向断层加固范围,研究了双护盾TBM穿越碎裂石断层注浆加固技术.研究结果表明:双护盾TBM施工中碎裂石断层影响范围主要为隧道纵向为1.15D范围,径向为2.3D范围,因此建议双护盾TBM穿越碎裂石断层时应在该影响范围内进行注浆加固;断层注浆加固时,利用超前钻机进行钻孔,调整优化注浆压力进行水泥-水玻璃双浆液注浆,同时提出TBM掘进参数建议值,形成了双护盾TBM穿越碎裂石断层施工技术;该施工技术效果显著,注浆加固后碎裂石混合物加固体强度提高了2.62倍,抵抗变形的能力得到了加强,确保了双护盾TBM顺利通过碎裂石断层,提前实现了孖雅区间隧道贯通.
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