三峡库区岩溶型地面塌陷形成机理及特点

Mechanism and Forming Features of Karst-type Ground Collapse in the Three Gorges Reservoir Region

三峡库区岩溶型地面塌陷问题影响到三峡工程的顺利进行,正确掌握它的形成机理及特点有利于其地质灾害的预防。以奉节新县城为例,从地形地貌、地层岩性、微构造及水文地质几方面论述其形成机理,并认为溶蚀作用是形成地面塌陷的关键因素;同时总结了地面塌陷的几大特点。

It is beneficial to prevent geological hazards to master the karst-type ground collapse in the Three Gorges reservoir region, which plays an important part in the construction of the Three Gorges Project. Taking the new Fengjie town as an example, the forming mechanism of karst-type ground collapse were discussed in topography and geomorphology, formation lithology, microstructure, and hydrogeology, and the conclusion is that the dissolution plays a key role in ground collapse. And also, the characteristics of karst-type ground collapse were summarized.