| 三峡库区巫山县翠屏小区岩溶引起的地质灾害危险性研究 |
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| 关键词:karst geo-hazard Triassic Jialingjiang formation(T1j) Wushan county Three Gorges Reservoir region |
| 基金项目:三峡移民开发局基金项目(编号:9707,9904) |
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| The Catastrophic Karstification of the Foundation Limestone in Cuiping Area, Wushan County, Three Gorges Reservoir Region |
| Karstification recently discovered in the Three Gorges Reservoir region is a vital engineering geological problem.The reliable karst evidence was discovered early in Cuiping area,Wushan County,and the authors' investigation has revealed that the limestone of Triassic Jialingjiang Formation(T1j)in the area generally has suffered strong karstification.There are different features and intensities of karstification in different parts.Longitudinally,there exists intensifying tendency of karstification from the hill top to bottom,and from surface to the depth,there exists local strong karst layer.Many slope-parallel or layer-parallel caves near the surface and beehive-like dissolved holes in depth were generated by karstification in the area.Some karst landforms like neck-shaped karst trough,uvala between two gullies and dissolution tableland,and some structures in connection with the landform such as flying-goose-shaping folds,normal karst faults and brush-shaped close-spaced joint zones were also produced by karstification.The karstification accompanied other exogenous processes,and many types of secondary rockmasses and soils were generated together with the processes.Due to karstification,the quality of rockmass will drop gradually and,what is more,there might occur geo-hazards such as uneven subsidence,fissure,landslide,collapse,mud flow and cave-in. |
| ZHANG Jia-gui,YIN Yue-ping,CAI Xiu-hua,LI Hong-tao,SUN Dang-sheng.2008.The Catastrophic Karstification of the Foundation Limestone in Cuiping Area, Wushan County, Three Gorges Reservoir Region[J].Acta Geoscientica Sinica,29(4):495-501. |
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