摘要
广西靖西大龙潭水库枢纽,为浆砌石重力坝,坝轴线长249工程于1963年竣工蓄水,同年坝基大量漏水,库内出现多处漏水漩涡,水从坝下穿流而过在下游涌出,当水库泄空后,发现库内有岩溶塌陷(落水洞)多处。以往采用常规的勘探方法仅能了解单个钻孔竖直方向的地质情况,不利于查清坝基横向连续发育的破碎带和溶洞空间分布。孔间电磁波CT探测技术与钻探相结合,正好可以弥补这方面的不足。孔间电磁波CT探测在大龙潭水库坝基的岩溶探测结果说明,这种方法可行有效,溶洞和破碎带探测结果还经过灌浆钻孔的验证。
The Dalongtan Reservoir Project is located in Jingxi County of Guangxi Autonomous Region;of which the masonry dam,is 249 meters long;it was completed and impounded in 1963.The dam foundation occurred a large number of water leakage;a number of vortex of leakage appeared;water flows under the dam into lower reaches.When emptying the reservoir,it is found that some karst collapses in the reservoir bottom.The past used conventional methods can only understand a single exploration drilling vertical direction of the geological conditions,not conducive to identify foundation for the development of horizontal and cave with broken spatial distribution.CT-between electromagnetic detection with drilling technology integration,it can make up for this deficiency.CT-between electromagnetic detection Dalongtan Reservoir dam foundation in the exploration of karst results show that this approach is feasible and effective.
作者
黎华清
卢呈杰
韦吉益
劳武
LI Hua-qing;LU Ceng-jie;WEI Ji-yi;LAO Wu(Institute of Karst Geology Chinese Academy of Geological Sciences,Guilin,541004,China;Guangxi Kelai Hydropower Engineering Co.Ltd.,Nanning 530000,China)
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2008年第S01期607-610,共4页
Rock and Soil Mechanics
关键词
岩溶
塌陷
碎带
溶洞
孔间电磁波
岩溶CT探测
karst
collapse
fracture zone
cave
holes on the electromagnetic wave
karst CT detection
