摘要
黔张常铁路高山隧道平导施工中遇到一巨型溶洞,处理方案研究过程中提出两条绕行线路,为确定最终线路方案,采用物探对岩溶及构造发育情况进行探测.早在勘察阶段采用的物探方法对该溶洞的异常反映不明显,通过各种方法对比分析,选用OCTEM法进行探测.首先对原线路方案进行探测,找出巨型溶洞的异常特征;然后对其他线路方案进行探测,找出和溶洞异常特征相似的异常;最后对各方案的探测结果进行对比分析,选出地质条件较好的线路方案.随着隧道开挖揭示,对探测发现的各异常进行验证,验证表明异常对应关系较好.应用该方法为线路方案快速选择提供了依据.
A giant karst cave was encountered during the initial excavation of the level segment of alpine tunnel of Qian-Zhang-Chang railway,so that two bypass routes were proposed during the investigation of its treatment option.In order to determine the final route option,the geophysical exploration was adopted to survey the development of the karst and its structure.The response of the survey method used in early stage to the anomalism of the karst cave was not obvious,so that the opposing coils transient electro-magnetometry（OCTEM）method was applied after comparing and analyzing various methods.First,the survey along the original route was conducted to find the anomalous characteristics of the giant karst cave.Then,the survey along the other two proposed bypass routes was carried out to find out their anomalism similar to the foregoing anomalous characteristics.Finally,the survey results of all the routes were compared and analyzed to select a route scheme with better geological condition.Along with the excavation of the tunnel,the all found anomalisms were verified that their correspondence with each other would be better.The application of the OCTEM method will provide a reference for rapid selection of the route option.
出处
《兰州理工大学学报》
CAS
北大核心
2018年第1期143-147,共5页
Journal of Lanzhou University of Technology
关键词
OCTEM法
高山隧道
隧道勘察
线路方案选择
opposing coils transient electromagnetometry
alpine tunnel
tunnel exploratiom route selection
