综合勘察手段查明贵州镇胜公路黄果树隧道左线(ZK17+150-ZK17+210)段地基情况  

Investigation of ZHEN-SHENG Highway in Guizhou Province Huangguoshu Tunnel Left (ZK17+150～ZK17+210) Section by Comprehensive Survey Approach

作　　者：杨涛毅 冷学士[2] 

机构地区：[1]贵州省地质环境监测院,贵州贵阳550004 [2]贵州大学资源与环境工程学院,贵州贵阳550003

出　　处：《贵州大学学报（自然科学版）》2010年第6期131-134,共4页Journal of Guizhou University:Natural Sciences

摘　　要：黄果树隧道ZK17+150-ZK17+210位于贵州省关岭县境内,跨度40m,处于漏斗状落水洞内,由于该段详勘阶段未进行专门勘察,地基情况不明确,成拱后地基下沉导致初级支衬开裂,拱部不断有水下渗,为查明落水洞范围地基岩土构成,在施工阶段进行补充勘察,由于拱内因可塑状粘土塌落物堆积,中部净空不利于架设钻机,挖方掏土会加速地面下沉,在ZK17+170-ZK17+200段采用地面物探高密度电法铺助勘察方法解决此难题,效果良好。Huangguoshu tunnel ZK17＋150～ZK17＋210 lies in Guanling County in Guizhou Province,span of 40m,in a funnel-shaped sinkholes.Because a special survey wasn＇t conducted at the detailed survey stage,the ground situation is not clear,the ground subsidence caused crack in the primary branch liner after arch,and water infiltration emerged continuously in the arch position.In order to identify the foundation rock structure in the range of water cave,additional inspections was performed during the construction phase.Due to arch collapse within a plastic material like clay accumulation,central clearance is not conducive to set up drilling rig,excavation dig soil surface subsidence has accelerated in the ZK17＋170～ZK17＋200 segment on the surface of high density electrical shop Geophysical survey methods to help resolve this problem with a good results.

关 键 词：岩溶漏斗 高密度电法 钻探 地基处理 

分 类 号：U457[建筑科学—桥梁与隧道工程]