Stability analysis of subgrade cave roofs in karst region

来源期刊：中南大学学报(英文版)2008年第z2期

论文作者：蒋冲 赵明华 曹文贵

文章页码：38 - 44

Key words：pile foundation； karst； subgrade cave roof； cusp catastrophe model； stability

Abstract: According to the engineering features of subgrade cave roof in karst region, the clamped beam model of subgrade cave roof in karst region was set up. Based on the catastrophe theory, the cusp catastrophe model for bearing capacity of subgrade cave roof and safe thickness of subgrade cave roof in karst region was established. The necessary instability conditions of subgrade cave roof were deduced, and then the methods to determine safe thickness of cave roofs under piles and bearing capacity of subgrade cave roof were proposed. At the same time, a practical engineering project was applied to verifying this method, which has been proved successfu1ly. At last, the major factors that affect the stability on cave roof under pile in karst region were deeply discussed and some results in quality were acquired.