Firstly, this paper studies the reasons of the subsiding of cavern and predigests the interactional system between the pile and the cavern to a simple model.

• 首先，本文讨论了岩溶失稳的机理，以岩石力学理论为基础，对桩基和溶洞相互作用系统进行概化，得出一概化模型。