综合物探技术在隧道基底岩溶探测中的应用  

Application of comprehensive geophysical exploration technologies for probing karst under tunnel invert

作　　者：刘杰[1,2] 杜翠[1,2] 程远水[1,2] 

机构地区：[1]中国铁道科学研究院铁道建筑研究所,北京100081 [2]高速铁路轨道技术国家重点实验室,北京100081

出　　处：《铁道建筑》2016年第1期33-37,共5页Railway Engineering

基　　金：中国铁道科学研究院基金项目(2015YJ036)

摘　　要：岩溶塌陷是铁路建设中经常遇到的地质灾害,具有隐蔽性、突发性等特点,是隧道工程主要安全隐患之一。本文采用探地雷达和地震映像相结合的综合物探技术,对准格尔—朔州铁路六郎山隧道底部进行岩溶探测。首先应用探地雷达技术对整个隧道底部进行全面探测,初步识别隧道底部岩溶的分布范围、岩溶类型、岩溶发育程度等异常情况,再利用地震映像技术对异常区域进行验证,从而最终确定岩溶的分布。两种方法相互验证,减少了误判,效果良好。Karst collapse is one of the common geological hazards in railway construction,which has the characteristics of concealment and emergency and is one of the major security risks for the tunnel project.This paper adopted comprehensive geophysical exploration technology by combing the ground penetrating radar（GPR） and the seismic image,and made karst exploration at the bottom of Liulangshan tunnel in Zhungeer-Shuozhou railway.Overall exploration of whole tunnel bottom was implemented by GPR,which could initially identify such abnormal conditions as the distribution range,the karst type and the karst development degree at the bottom of the tunnel,the abnormal regions were verified by seismic image technology,and the karst distribution was determined finally.Two methods are validated by each other,reducing the false positives,and the good effect is achieved.

关 键 词：隧道基底 岩溶 探地雷达 地震映像 综合探测 

分 类 号：P631.44[天文地球—地质矿产勘探]