First order reliability-based design optimization of 3D pile-reinforced slopes with Pareto optimality

被引:54
作者
Hu, Yining [1 ,3 ]
Ji, Jian [1 ]
Sun, Zhibin [2 ]
Dias, Daniel [2 ,4 ]
机构
[1] Hohai Univ, Geotech Res Inst, Key Lab Minist Educ Geomech & Embankment Engn, Nanjing 210024, Peoples R China
[2] Hefei Univ Technol, Sch Automot & Transportat Engn, Hefei 230009, Peoples R China
[3] INSA Lyon, Lab GEOMAS, Villeurbanne, France
[4] Univ Grenoble Alpes, Inst Polytech Grenoble, French Natl Ctr Sci Res CNRS, Lab Sols Solides Struct Risques,Lab 3SR, F-38000 Grenoble, France
基金
中国国家自然科学基金;
关键词
Pile-reinforced soil slope; Three-dimensional stability analysis; Pareto optimality; Kinematic analysis; First-order reliability method; 3-DIMENSIONAL STABILITY; LIMIT ANALYSIS;
D O I
10.1016/j.compgeo.2023.105635
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
As verified structures for landslide mitigation, stabilizing piles are often adopted to treat local failure zones of width-limited soil slopes. To achieve a balance between slope safety and construction cost, an optimized piling scheme for treating width-limited soil slopes should be obtained through three-dimension (3D) stability analysis. In this regard, this paper presents a novel calculation framework for the multi-objective optimization (MOO) design of stabilizing piles. It is based on the first-order reliability method (FORM) and considers a 3D widthlimited slope failure with geological uncertainties. The study first develops a deterministic 3D stability model of pile-reinforced slopes using limit analysis. Accounting for soil shear strength uncertainties, reliability analyses of 3D reinforced slopes are conducted based on the prescribed pile-reinforcement patterns. Then, a multiobjective probabilistic design procedure combining the Pareto front and reliability analysis results is proposed. The effectiveness and significance of the proposed MOO design framework are demonstrated through two illustrative examples: one involves designing stabilizing piles in a homogenous slope, and the other involves designing for an inhomogeneous earth slope with depth-dependent soil cohesion. To gain better understanding of the probabilistic impact of uncertain pile design parameters on reinforced slope stability, comprehensive parametric studies are conducted.
引用
收藏
页数:12
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