由于地下水潜蚀、化学溶蚀等作用，灰岩地区溶洞、土洞较为发育，给桩基施工带来较大困难。
By the action of groundwater erosion and chemolysis, cavities are well developed in limestone area, which causes many problems for pile foundation construction.
岩溶形态以溶蚀裂隙洞穴为主，地下水类型多为裂隙溶洞型。
The karst is mainly in the form of caverns, and the groundwater is mostly of fissure cavern type.
岩溶地下水赋存于地表以下浅部岩溶带、构造控制的中部岩溶带和深部古溶蚀带。
The karst groundwater stores in the shallow karst zones below the surface, the middle karst zones controlled by geological structures and the deep zones of fossil karst.
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