TSP203在小角度不整合带隧道中的应用研究  

Application of TSP203 in small-Angle unconformity band in tunnel

作　　者：梅华 郑立孝 刘文祥 MEI Hua;ZHENG Lixiao;LIU Wenxiang(School of Architecture and Engineering, Hunan Institute of Technology, Hengyang 421002)

机构地区：[1]湖南工学院建筑工程与艺术设计学院,湖南衡阳421002

出　　处：《福建建筑》2018年第11期51-54,共4页Fujian Architecture & Construction

基　　金：湖南省教育厅科研资助项目(15C0366;15C0365);湖南工学院校级科研项目(hy16003)

摘　　要：TSP在隧道超前地质预报中广泛应用,但由于解译的多解性和地质情况复杂性,因此,开展不同不良地质体的预报研究具有较大意义。文章以某高速公路小川隧道为例,其出口段存在与隧道轴线呈小角度相交不整合带的不良地质体,使用TSP对不整合带进行探测。通过与实际开挖掌子面描述结果对比分析,得出小角度不整合带探测深度偏移图和物性参数图的特点,并分析了不整合带的空间分布、地下渗水和节理裂隙发育的预报效果。分析结果表明,结合前期开挖掌子面描述和地质勘察资料,TSP能较准确地对不整合面空间展布状态、地下水存在和节理裂隙进行地质超前预报,但其预报结果与实际开挖情况存在一定差异。TSP is widely used in the geological prediction of tunnel advance,but it is of great significance to carry out the prediction research of different adverse geological bodies due to the multiresolution of interpretation and complexity of geological conditions.There are bad geo-logical bodies in the outlet section of xiaochuan tunnel which intersect unconformity zone with tunnel axis at a small Angle.By comparing with the results of the description of the excavated palmface,the characteristics of the migration chart and the physical parameters chart of the unconformity zone with small Angle are obtained,and the prediction results of the spatial distribution,underground seepage and fracture development of the unconformity zone are analyzed.The analysis results show that the TSP can accurately predict the spatial distribution of unconformity surface,the existence of groundwater and the joint fissure based on the preliminary excavation description and geological sur-vey data,but the forecast results are different from the actual excavation.

关 键 词：超前地质预报 TSP探测 不整合接触带 波形分析 

分 类 号：U452.1[建筑科学—桥梁与隧道工程]