TST超前地质预报法案例应用及分析  

Case Application and Analysis of TST Geological Prediction Methodology

作　　者：李晓宗 LI Xiaozong(Guangdong Jianke Transportation Engineering Quality Testing Center Co.,Ltd.Guangzhou 510599,China;Guangdong Transportation Infrastructure Intelligent Detection Engineering Technology Research Center Guangzhou 510599,China)

机构地区：[1]广东建科交通工程质量检测中心有限公司,广州510599 [2]广东省交通基础设施智能检测工程技术研究中心,广州510599

出　　处：《广东土木与建筑》2025年第2期108-111,共4页Guangdong Architecture Civil Engineering

摘　　要：通过实际工程中TST(Tunnel Seismic Tomography)超前预报法的应用。得出TST预报过程中不均匀反射界面与实际里程会有偏差,因此实际预报中针对地质偏移图像中出现的不均匀界反射界面或者波速变化界面应扩大预警范围。其次速度分布图像中围岩波速表征围岩的力学强度高低。波速升高与降低并不完全代表岩层整体的完整与破碎,还与岩性变化有关。最后TST是一种宏观的超前地质预报方法。地质偏移图像中红蓝线条分布位置大体与隧道断面相对应,图像中出现的不均匀反射界面不仅仅局限于掌子面正前方,可能存在于拱腰、拱脚等深层部位,其深度与预报中横向偏移距有关。Through application of TST(Tunnel Seismic Tomography)geological forecasting method in practical engineering.The uneven reflection interface in the TST prediction process will deviate from the actual mileage,so the warning range should be expanded for the uneven boundary reflection interface or wave speed change interface in the geologic offset image in the actual prediction.Secondly,the wave velocity of the surrounding rock in the velocity distribution image characterizes the mechanical strength of the surrounding rock.The increase and decrease of wave velocity does not completely represent the integrity and fragmentation of the rock layer as a whole,and it is also related to the change of lithology.Finally,TST is a macroscopic over-advanced geological forecasting method.The distribution of red and blue lines in the geological offset image corresponds to the tunnel section,and the uneven reflection interface in the image is not only limited to the front of the palm face,but also may exist in the arch waist,the foot of the arch,and other deep parts,the depth of which is related to the transverse offset distance in the forecast.

关 键 词：超前地质预报 TST 弹性波 地质偏移图像 速度分布图像 

分 类 号：U456.33[建筑科学—桥梁与隧道工程]