Sequential excavation analysis of soil-rock-mixture slopes using an improved numerical manifold method with multiple layers of mathematical cover systems
Sequential excavation analysis of soil-rock-mixture slopes using an improved numerical manifold method with multiple layers of mathematical cover systems
复制标题
使用改进的数值流形方法和多层数学覆盖系统对土石混合体边坡进行顺序开挖分析
DOI：
10.1016/j.enggeo.2019.105278
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发表时间：
2019
影响因子：
7.4
通讯作者：
Zheng Hong
中科院分区：
文献类型：
--
作者：
Yang Yongtao;Sun Yinghao;Sun Guanhua;Zheng Hong
采用多层数学覆盖的改进数值流形方法（INMM）对土石混合体（SRM）边坡进行了顺序开挖分析。为了获得SRM边坡的FOS（安全系数），在INMM中使用了增强的SSRT（剪切强度折减技术）。此外，两个算法，即，一个算法，以确定挖掘ME（流形元素）和算法，以消除挖掘ME，被纳入INMM研究的SRM边坡开挖的影响。与INMM，两个例子，包括一个土质边坡和两个SRM边坡进行顺序开挖施工，进行了研究。仿真结果表明：1）INMM能准确预测边坡开挖过程及自由应力; 2）块体含量越高，边坡的自由应力越大; 3）INMM与传统NMM（TNMM）的自由应力相同，但INMM的内存消耗和计算量较小。
An improved numerical manifold method (INMM) with multiple layers of mathematical cover (MC) systems is employed for a sequential excavation analysis of SRM (soil-rock-mixture) slopes. For the purpose of obtaining the FOS (factor of safety) of a SRM slope, an enhanced SSRT (shear strength reduction technique) is used in the INMM. Furthermore, two algorithms, i.e., an algorithm to identify the excavated MEs (manifold elements) and an algorithm to remove the excavated MEs, are incorporated into the INMM to study the effects of excavation of the SRM slopes. With the INMM, two examples, including a soil slope and two SRM slopes subjected to sequential excavation construction, are investigated. The simulation results show that 1) the excavation processes, as well as the FOSs of the slopes, can be accurately predicted with the INMM; 2) the higher the content of rock blocks, the larger the FOS of the SRM slope will be; and 3) the FOSs assessed from the INMM are the same as those from the traditional NMM (TNMM), but the memory consumption and computational cost of the INMM are smaller.