Research & Reviews: Journal of Engineering and Technology
MenuISSN: 2319-9873
ISSN: 2319-9873
+44 7456 035580 Geng Cao, Wei-Ming Gong and Gou-Liang Dai
Southeast University, China
ScientificTracks Abstracts: JET
The rectangular closed diaphragm (RCD) wall is used in highway and railway bridge engineering. The foundations are subjected to combined verticalhorizontal- moment (V-H-M) loadings during operation especially when used as the foundation of arch bridge. In this study, the numerical modelling adopted in this study was verified by comparing the calculated capacities with those from previous studies. The results of a finite element study addressing the effect of embedment ratio (L/D) of RCD foundations on the bearing capacity under uniaxial and combined loadings are investigated. The kinematic mechanism accompanying failure under uniaxial loading is addressed and presented for different embedment ratios. A series of equations are proposed to predict the ultimate vertical, moment and maximum horizontal bearing capacity factors as well as to define the capacity envelopes under general combined loads generated with probe method. Predictions of the uniaxial bearing capacities are compared with other models and it is confirmed that the proposed equations appropriately describe the capacity of RCD foundations under uniaxial vertical, horizontal and moment loading in homogenous cohesive soils. Based on finite element analyses, the equation of failure envelope can be used to evaluate the stability of the rectangular closed diaphragm wall foundation in clay.
Geng Cao is pursuing his PhD, major in civil engineering in Southeast University in China, and also is a Teacher in Hanzhong vocational and technic college, Shaanxi Province, China. His research interests are the foundations of highway and Railway Bridge, and the rectangular closed diaphragm (RCD) wall foundation especially. He has published five papers in reputed journals.
E-mail: caogeng@seu.edu.cn