Factors Affecting the Ultimate Bearing Capacity of Foundation Based on Orthogonal Design and Rough Set Theory

ZHANG De-yong; WANG Yu-zhou; ZHANG Zhi-hao; QIAN Ming

doi:10.11988/ckyyb.20140097

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Journal of Changjiang River Scientific Research Institute ›› 2015, Vol. 32 ›› Issue (9) : 118-122. DOI: 10.11988/ckyyb.20140097

ROCKSOIL ENGINEERING

Factors Affecting the Ultimate Bearing Capacity of Foundation Based on Orthogonal Design and Rough Set Theory

ZHANG De-yong, WANG Yu-zhou, ZHANG Zhi-hao, QIAN Ming

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Abstract

According to the statistical data of a large-scale project in Yunnan Plateau, a typical karst cave model covered with clay was established by employing ANSYS and FLAC3D, and the ultimate bearing capacity of foundation was calculated and its regularities were summarized in the presence of varying cohesion, internal friction angle, tensile strength, thickness of roof, depth-span ratio, cave radius, and cave width. Furthermore, through orthogonal analysis and rough set theory, the influences of these factors on the ultimate bearing capacity of the foundation were analyzed. Results reveal that roof thickness and shear strength have the biggest influence on the ultimate bearing capacity, followed by cave radius, depth-span ratio and cave width, while tensile strength has the smallest impact.

Key words

covered karst / ultimate bearing capacity of foundation / numerical analysis / orthogonal analysis / rough set theory

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ZHANG De-yong, WANG Yu-zhou, ZHANG Zhi-hao, QIAN Ming. Factors Affecting the Ultimate Bearing Capacity of Foundation Based on Orthogonal Design and Rough Set Theory[J]. Journal of Changjiang River Scientific Research Institute. 2015, 32(9): 118-122 https://doi.org/10.11988/ckyyb.20140097

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