Stability of active trapdoors in axisymmetry  

作　　者：Suraparb Keawsawasvong Jim Shiau 

机构地区：[1]Department of Civil Engineering,Thammasat School of Engineering,Thammasat University,Pathumthani 12120,Thailand [2]School of Civil Engineering and Surveying,University of Southern Queensland,QLD 4350,Australia

出　　处：《Underground Space》2022年第1期50-57,共8页地下空间（英文）

摘　　要：Trapdoor stability has been widely studied by many researchers in the field of tunneling engineering.A general question being fre-quently asked is that why most sinkholes have a near-perfect circular shape on the ground surface.This could be possibly explained by the current numerical study using finite element limit analysis under axisymmetric condition,where upper and lower bound solutions of active circular trapdoors are determined.The failure study of sinkholes and the associated failure mechanisms in this paper are for non-homogeneous clay with a linear increase of strength with depth under various cover depth ratios and dimensionless strength gra-dients.A design equation for predicting the stability solutions is also developed based on the novel three dimensional solutions using axisymmetry.

关 键 词：Numerical analysis AXISYMMETRY STABILITY TRAPDOOR Active failure 

分 类 号：U45[建筑科学—桥梁与隧道工程]