南水北调与水利科技Issue(4)：751-755,5.DOI:10.13476/j.cnki.nsbdqk.2015.04.032
重庆市铜锣山地区岩溶塌陷分布规律及成因分析
Analysis on distribution and formation of the karst collapse in Tongluoshan of Chongqing
摘要
Abstract
Karst rocks in Tongluoshan of Chongqing city are mainly distributed in the heartland of the Tongluoxia Anticline and Nanw enquan Ant icline, and are mostly the carbonate of t he Lower T riassic Jialingjiang Formation and Middle T riassic Leikoupo Formation. The karst rocks H develop along t he st rata layers unevenly and are characterized by vertical zonation, and t he overly-ing strat um on the karst rocks has a Hdual st ructureH consist ing of the upper permeable layer and low er impervious layer. Tw o types of karst collapse dominate in t he study area including the natural collapse and man-made collapse, and the nat ural collapse occurs independently w hile t he man-made collapse usually occurs in groups. T he distribution of karst collapse is affect ed by the distribut ion of karst rock, karst development, and inducing factors. Karst collapse in T ongluoshan of Chongqing city is mainly located in( 1) low-lying areas in the trough valley; ( 2) carbonate outcrops w ith karst development; ( 3) areas covered by soil layers wit h thickness of 3 to 10 meters; and( 4) areas with significantly decreasing groundw ater levels. H Ground collapse in study area is mainly caused by “ H subsurfaceH erosion and H softeningH-H seepage failureH-H negative pressureH absorption” . Moreover, sudden decline in groundwater levels resulted from tunnel excavation through aquifer is the key of collapse development.关键词
重庆市铜锣山/二元土层结构/岩溶塌陷/成因分析Key words
T ongluoshan of Chongqing/Dual soil layer st ructure/karst collapse/genetic analysis分类
天文与地球科学引用本文复制引用
谢晓彤,李少荣,廖云平,杨乐,彭海游,阳畅..重庆市铜锣山地区岩溶塌陷分布规律及成因分析[J].南水北调与水利科技,2015,(4):751-755,5.基金项目
重庆市国土房管局2011年度地质灾害防治专项资金资助项目(120301) （120301）
