TRT预报波速参数优化及其在贵州某岩溶隧道地质预报中的应用  

Optimization of Wave Velocity Parameters for TRT Forecast and Its Application in the Advanced Geological Forecast of a Karst Tunnel in Guizhou

作　　者：田岗[1,2] 白明洲[1,2] 王成亮[1,2] 师海 聂一聪 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]北京市轨道交通线路安全与防灾工程技术研究中心,北京100044

出　　处：《现代隧道技术》2016年第5期200-207,共8页Modern Tunnelling Technology

基　　金：国家自然科学基金资助项目(41372351);中央高校基本科研业务费专项资金(2011JBM265)

摘　　要：文章分析和讨论了TRT技术的基本原理,指出了TRT技术在隧道地质超前预报中的优缺点。根据目前TRT背景速度选取时存在的问题——背景波速的选取受人为因素影响较大而缺乏一定的客观性,提出了基于正态分布条件下的直达波速置信区间的计算方式,并以置信区间的上下界值分别作为背景波速参数录入TRT系统加以计算分析,一定程度上避免了人工选取的单一背景波速在岩溶隧道地质灾害预报中的局限性。同时,在进行TRT成果图像分析时,将图谱划分为三对色谱带进行解释分析,从而使对TRT成果图像的判读更具针对性。结合某岩溶隧道分段波速信息及现场地质资料进行了综合地质预报研究,验证了本文方法的准确性。The basic principles of TRT technology are analyzed and discussed, and the advantages and disadvantages of TRT technology in tunnel geological forecasts are listed. Considering that the selection of TRT background wave velocity is greatly influenced by human factors and lacks objectivity, a calculation mode for the direct velocity confidence interval under a normal distribution is put forward. The upper and lower thresholds of the confidence in- terval were used as the background wave velocity parameters put into the TRT system for calculation and analysis, and to some extent this method avoids the limitations of a single background wave velocity selected manually for geo- logical disaster forecasts in Karst tunnels. For analysis of the resulting TRT images, the map would be divided into three pairs of chromatographic bands to be interpreted and analyzed, and thereby the interpretation of the TRT imag- es shall be more targeted. Based on the segmented wave velocity information and the geological field data of a cer- tain Karst tunnel, a comprehensive geological forecast was conducted and the accuracy of this method was verified.

关 键 词：TRT技术 地质超前预报 地震波 正态分布 置信区间 色谱 

分 类 号：TU195[建筑科学—建筑理论] U452.11[建筑科学—桥梁与隧道工程]