Three-dimensional sinkhole stability of spherical cavity

被引:18
作者
Shiau, Jim [1 ]
Chudal, Bishal [1 ]
Keawsawasvong, Suraparb [2 ]
机构
[1] Univ Southern Queensland, Sch Engn, Toowoomba, Qld, Australia
[2] Thammasat Univ, Thammasat Sch Engn, Dept Civil Engn, Bangkok, Thailand
关键词
Collapse stability; Finite element limit analysis; Pressure ratio; Sinkhole; Trapdoor; UNDRAINED STABILITY; CIRCULAR TUNNEL; LIMIT ANALYSIS; STRENGTH; COLLAPSE;
D O I
10.1007/s11440-022-01522-8
中图分类号
P5 [地质学];
学科分类号
0709 ; 081803 ;
摘要
Sinkhole occurrences due to underground water mains operations have piqued people's curiosity. Most research works were in relation to geophysical practices to discover the subsurface cavity. Very few works can be found in relation to the investigation of soil stability due to underground cavity shapes. The actual shape of an underground cavity and its transformation is difficult to predict, though the sinkhole failures are mostly circular in shape on the ground surface. This study explores the three-dimensional collapse stability of three distinct idealized cavity geometries, namely the circular, semi-spherical, and spherical cavities. For an active failure, dimensionless parameters are used to investigate the combined impacts of soil cover, surcharge pressure, soil weight, and internal pressure using advanced finite element limit analysis. Numerical results are compared with the two-dimensional axisymmetric results, and design charts presented to cover a wide range of design parameters for practical applications.
引用
收藏
页码:3947 / 3958
页数:12
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