综合物探技术在深圳地铁16号线岩溶勘察中的应用  

Application of comprehensive geophysical technology in karst investigation in Line No.16 of Shenzhen Metro

作　　者：龚选波[1] 张继伟 周玉凤[1] 周艳华 周勇 Gong Xuanbo;Zhang Jiwei;Zhou Yufeng;Zhou Yanhua;Zhou Yong(Beijing Urban Construction Survey and Design Institute Co. Ltd. , Beijing 100101, China;Foshan Branch, Guangzhou Geological Survey Foundation Engineering Company, Guangzhou 528000, China)

机构地区：[1]北京城建勘测设计研究院有限责任公司,北京100101 [2]广州地质勘察基础工程公司佛山分公司,广州528000

出　　处：《工程勘察》2018年第7期62-67,共6页Geotechnical Investigation & Surveying

摘　　要：岩溶问题是深圳地铁16号线面临的最大的地质问题。岩溶的发育程度、分布特征等对地铁设计、施工及运营安全影响很大。岩溶勘察主要是采用物探和钻探相结合的手段,由于地铁工程主要在市政道路下方,常用的高密度电法、地质雷达等方法往往不能准确探测出岩溶发育情况。跨孔地震波CT是利用地震波在两个钻孔中分别发射和接收,根据不同位置上接收的场强的大小,来确定地下不同介质分布的一种物探方法。而管波探测法是在钻孔中利用"管波"作为探测物理场,探测孔旁一定范围内的溶洞、溶蚀裂隙、软弱夹层等不良地质体的最新孔中物探方法。本文以深圳地铁16号线同乐村站岩溶探测为例,介绍了跨孔弹性波CT、管波探测技术的原理、工作方法及应用效果,结果表明井间弹性波CT、管波探测技术有较高的精度和可信度,可全面清晰地揭示场地岩溶的空间分布特征,为地铁工程建设提供可靠的基础地质资料。Karst is the most severe geological problem in Shenzhen Metro Line No. 16. The development and distribution characteristics of karst have great influence on the safety of subway design,construction and operation. Karst exploration is mainly based on geophysical and drilling methods. The commonly used high-density electrical method,geological radar and other methods often cannot accurately detect the development of karst for the subway works are mainly under the municipal roads. Cross-hole seismic CT is exploration method to determine the distribution of different ground media based on the magnitude of field intensity of the seismic waves received at different locations which is launched and received between boreholes. While the tube wave detection method is a latest method to detect adverse geological bodies around borehole,such as karst cave,corrosion crack and weak interlayer,etc. The cross-hole elastic wave CT,tube wave detection technology principle,method and application effect are introduced. A karst investigation for Tongle Village Station of Shenzhen Metro Line No. 16 is carried out. The results show that cross-hole elastic wave CT,tube wave detection technology is precise and reliable to reveal the spatial characteristics of karst distribution and to provide reliable geological data for construction.

关 键 词：跨孔弹性波CT 管波探测 岩溶勘察 工程勘察 

分 类 号：TU459[建筑科学—岩土工程]