不良地质地层中隧洞施工方法

Methods for tunneling through difficult ground strata

地下工程施工的不良地质地层包括低强度的软弱岩层、地质构造发育的结构松散地层、非岩性粘土和粒状土地层、高地应力地层、富水地层中地下水活动强烈的地段等。根据国内外已建成或在建的隧洞施工实例，简要介绍在不良地质地层中进行隧洞施工的主要方法———分部施工法、超前支护法、超前灌浆法。

In the tunnel works,the difficult geologic conditions such as weak, structure-developed, clay and granular soil, high-ground-stress or intensive-groundwater-activity strata are often encountered. According to examples of completed or under construction tunnel excavation at home and abroad,the tunneling methods through difficult strata,including the partitioning construction,advanced supporting, advanced grouting, new Austrian method and shield tunneling method,etc.,are presented in this paper.