A new method determining safe thickness of karst cave roof under pile tip

作者：Jiang Chong^*; Liu Lang; Wu Jun-ping

来源：Journal of Central South University, 2014, 21(3): 1190-1196.

DOI：10.1007/s11771-014-2053-x

• karst
• cave roof
• theory of plates and shells
• pile
• safe thickness

Cave roofs are used to support pile foundation in many engineering projects. Accurate stability analysis method of cave roof under pile tip is important in order to ensure the safety of the pile foundation structure. Firstly the mechanical model to analysis the stability of cave roof under pile tip is founded aiming to solve the problems that the simplified mechanical model has. Secondly, the boundary of cave roof is simply supposed to be supported according to the integrity of the rock mass in the boundary of cave roof. Thirdly, based on the theory of plates and shells, the simplified model is calculated and the theoretical calculation formula to determine the safe thickness of cave roof under pile tip can be obtained when the edges of the cave roof are simply supported. In the end, the analysis of the practical engineering project proves the feasibility and the rationality of the method which can be a new method to calculate the safe thickness of cave roof under pile tip.

• 出版日期2014-3
• 单位中南大学