云南柴石滩水库灌区工程隧洞施工岩溶暗河探测  

Exploration of karst underground river in tunnel construction of irrigation project of Chaishitan Reservoir in Yunnan Province

作　　者：周延国 万伟锋 王耀军 ZHOU Yanguo;WAN Weifeng;WANG Yaojun(Yellow River Engineering Consulting Co.,Ltd.,Zhengzhou 450003,China)

机构地区：[1]黄河勘测规划设计研究院有限公司,河南郑州450003

出　　处：《水利水电快报》2021年第3期42-48,共7页Express Water Resources & Hydropower Information

摘　　要：云南柴石滩水库灌区工程隧洞施工开挖过程中揭露一超大溶洞,给隧洞施工带来了较大安全隐患及投资风险。分析了隧洞区工程地质及水文地质条件,基本查明了隧洞周边及洞内的岩溶暗河地质发育特征。采取了三维激光扫描仪测量岩溶空腔地形、地质雷达探测夹层岩体可靠性的联合探测方法,获取了岩溶暗河的三维结构和内部特征。有针对性地提出了洞轴线向右偏移的处理对策。处理方案实施后,隧洞开挖顺利、安全地穿越了岩溶暗河。An extra-large karst cavern was revealed during the tunnel excavation in the irrigation area of Chaishitan Reservoir in Yunnan Province,which bought risk to the safety and investment to tunnel construction.The engineer⁃ing and hydrogeological conditions of the tunnel area were analyzed,and the geological development characteristics of the karst underground river in the tunnel and the surrounding area was investigated.The topography of karst cavi⁃ty and the stability of interlayered rockmass was detected by 3D laser scanner and geological radar,respectively and 3D structure and internal characteristics of karst underground river were obtained.The tunnel route was suggest⁃ed to deviate to the right to avoid the karst underground river.The new scheme was implemented and the tunnel was excavated smoothly and safely crossed the karst underground river.

关 键 词：隧洞开挖 岩溶暗河探测 岩溶空腔 三维激光扫描仪 雷达探测 云南柴石滩水库 

分 类 号：TV554[水利工程—水利水电工程]