高地应力大变形隧道初期支护稳定状态监测技术  

Monitoring Technology of Initial Support Stability State of Tunnel with High In-Situ Stress and Large Deformation

作　　者：谢永录 XIE Yonglu(China Railway 12th Bureau Group No.2 Engineering Co.Ltd.,Taiyuan Shanxi 030032,China)

机构地区：[1]中铁十二局集团第二工程有限公司,山西太原030032

出　　处：《铁道建筑技术》2023年第1期173-176,183,共5页Railway Construction Technology

基　　金：中铁十二局集团第二工程有限公司科技研发计划项目(公司科[2019]04号)。

摘　　要：复杂地质条件下的高地应力大变形隧道,由于初期支护位移超过现有规范的限值,因此无法直接通过常规监控量测所得初期支护位移对其稳定状态进行评判。本文提出电磁辐射监测与常规监控量测相结合,通过初期支护位移变化和电磁辐射强度反映的围岩压力变化,进行初期支护稳定性状态监测、评判的方法。该方法综合考虑了初期支护位移及其诱因的变化,可及早发现初期支护局部屈服的部位,是高地应力大变形隧道初期支护稳定状态监测的可行方法。For the tunnel with high in-situ stress and large deformation under complex geological conditions, because the initial support displacement exceeds the limit of existing norms, it is difficult to evaluate the stable state of the tunnel through the initial support displacement obtained by conventional monitoring and measurement. This paper puts forward the method of monitoring and evaluating the stability of the initial support by combining the electromagnetic radiation monitoring with the conventional monitoring measurement, and through the change of the initial support displacement and the change of surrounding rock pressure reflected by the electromagnetic radiation intensity. This method comprehensively considers the changes of initial support displacement and its inducement, and can find the local yielding position of the initial support as early as possible, which is a feasible method for monitoring the stability state of the initial support of tunnels with high in-situ stress and large deformation.

关 键 词：初期支护 稳定状态 电磁辐射监测 强度 位移 围岩压力 

分 类 号：U456[建筑科学—桥梁与隧道工程]