The seepage erosion and disintegration produced by the activity of ground water will result in formation of soil cave.
岩溶区地下水或地表水的活动，将对土层产生潜蚀作用及崩解作用，进而形成土洞。
Cave, soil cave and the collapse caused by them have been paid more and more attention in Karst region.
岩溶区的溶洞、土洞及其产生的塌陷越来越受到人们的关注。
Research methods: Based on the elastic and plastic theory, the stress distribution of soil cave in foundation can be deduced in karst region.
研究方法：根据弹塑性理论，推求得到岩溶地基中土洞周边土体的应力状态。
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