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An improved numerical manifold method with multiple layers of mathematical cover systems for the stability analysis of soil-rock-mixture slopes
Highlights An improved NMM with multiple layers of mathematical cover systems is proposed for the soil-rock-mixture(SRM) slopes. An improved shear strength reduction technique is adopted and implemented into the improved NMM. The FOSs based on the NC criterion is greater than those based on the DPZ criterion for SRM slopes. The advantages of the improved NMM in discretization and accuracy are demonstrated.
Abstract In order to carry out stability analysis of soil-rock-mixture(SRM) slopes, an improved numerical manifold method (NMM) with multiple layers of mathematical cover systems is proposed. For SRM problems, the computational cost of the improved NMM is smaller than that of the traditional NMM. Besides, an improved shear strength reduction technique(ISSRT) which can eliminate spurious plastic deformation of the slopes is implemented. Based on the improved NMM with multiple layers of mathematical cover systems, the stability of three slopes, namely, a homogeneous slope and two SRM slopes with different contents of rock blocks is analyzed. The numerical results about the three slopes indicate that: 1) the proposed numerical model can obtain the FOS of a slope with high accuracy; 2) the bigger the content of rock blocks, the larger the FOS of the SRM slope will be; 3) due to the existence of rock blocks, the failure mode of a SRM slope is different from that of a homogeneous soil slope.
An improved numerical manifold method with multiple layers of mathematical cover systems for the stability analysis of soil-rock-mixture slopes
Highlights An improved NMM with multiple layers of mathematical cover systems is proposed for the soil-rock-mixture(SRM) slopes. An improved shear strength reduction technique is adopted and implemented into the improved NMM. The FOSs based on the NC criterion is greater than those based on the DPZ criterion for SRM slopes. The advantages of the improved NMM in discretization and accuracy are demonstrated.
Abstract In order to carry out stability analysis of soil-rock-mixture(SRM) slopes, an improved numerical manifold method (NMM) with multiple layers of mathematical cover systems is proposed. For SRM problems, the computational cost of the improved NMM is smaller than that of the traditional NMM. Besides, an improved shear strength reduction technique(ISSRT) which can eliminate spurious plastic deformation of the slopes is implemented. Based on the improved NMM with multiple layers of mathematical cover systems, the stability of three slopes, namely, a homogeneous slope and two SRM slopes with different contents of rock blocks is analyzed. The numerical results about the three slopes indicate that: 1) the proposed numerical model can obtain the FOS of a slope with high accuracy; 2) the bigger the content of rock blocks, the larger the FOS of the SRM slope will be; 3) due to the existence of rock blocks, the failure mode of a SRM slope is different from that of a homogeneous soil slope.
An improved numerical manifold method with multiple layers of mathematical cover systems for the stability analysis of soil-rock-mixture slopes
Yang, Yongtao (Autor:in) / Sun, Guanhua (Autor:in) / Zheng, Hong (Autor:in) / Yan, Chengzeng (Autor:in)
Engineering Geology ; 264
24.10.2019
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Stability analysis of slopes using the vector sum numerical manifold method
| Online Contents | 2020