In accordance with the collapse characteristic of trench wall during underground diaphragm wall construction, a modified three-dimensional (3D) failure mechanism of trench wall is established. By introducing nonlinear characteristic and the nonhomogeneity of soil into the theoretical calculation, the objective function of the safety factor (Fs) of the trench wall in the limit condition is derived, and the upper bound solution of the Fs of the slurry trench is derived by employing the optimization computation. To prove the validity of the presented approach, the solutions derived from the presented method are compared with those previous solutions and the comparing results show a good agreement. Moreover, the parametric analysis is conducted to study the effect of various parameters on the stability of trench wall. The results of parametric analysis show that nonlinear and the nonhomogeneous parameters have significant influence on the safety factors, and the nonlinear failure characteristic of the nonhomogeneity of soil cannot be ignored in the practical engineering.
Three-dimensional Stability Analysis of Slurry Trench Based on Mohr-Coulomb Nonlinear Failure Criterion
KSCE J Civ Eng
KSCE Journal of Civil Engineering ; 26 , 12 ; 5038-5048
2022-12-01
11 pages
Article (Journal)
Electronic Resource
English
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