Optimal Location of Piles in Stabilizing Slopes Based on a Simplified Double-Row Piles Model

Li, Changdong; Chen, Wenqiang; Song, Yingjie; Gong, Wenping; Zhao, Qihua

doi:10.1007/s12205-020-0712-z

Cited by 25 publications

(20 citation statements)

References 58 publications

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“…CASP is the most widely used because of its simple structure and economy [11][12][13][14][15][16][17][18][19]. The main problem of CASP is that there is an obvious stress concentration effect occurred near slip plane, which causes high moment and large deformation of the pile.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Behavior and Application of a Novel Supporting and Retaining Structure for Slope

Liu

et al. 2022

Period. Polytech. Civil Eng.

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This paper proposed a novel supporting and retaining structure used to high-steep building slope reinforcement. It combined with an anti-sliding pile and an inclined supporting column, which is used as a fulcrum on the upper part of pile. The mechanical characteristics of the novel supporting and retaining structure are studied firstly by two mechanical methods and two numerical methods, respectively. Result shows that the axial force will be evenly distributed along the column body and it provide a quite resistant force, meanwhile. There are two shear force concentrated areas of the anti-sliding pile, one is from the top of the embedded area of the pile body to the potential slip plane, the other is at the joint. Subsequently, the results of these methods are compared synthetically and the differences between the results are also discussed. It shows that a large shear force and moment will be caused at the restrained end of the pile body by the force method and 2D numerical model 1. And in Wenkler model and the 2D numerical model 2, the rock is considered non-rigid, the anti-sliding pile will produce a certain amount of deflection under the sliding thrust, which reduces the shear force and moment at the top of the embedded area of the pile body. Finally, the novel supporting and retaining structure is applied to the site, and the monitoring data shows that the novel supporting and retaining structure is economic and effective for the reinforcement of the high-steep building slope.

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Section: Introductionmentioning

confidence: 99%

Mechanical Behavior and Application of a Novel Supporting and Retaining Structure for Slope

Liu

et al. 2022

Period. Polytech. Civil Eng.

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“…With the rapid development of global engineering construction, slope stability has become a worldwide significant problem in engineering practice (Hassiotis et al 1997;Li et al 2020). The anti-slide pile as the most conventional reinforcement method is widely used due to the advantages of strong anti-sliding ability and convenient construction (Cai and Ugai 2000;Kanagasabai et al 2011;Liu et al 2020;.…”

Section: Introductionmentioning

confidence: 99%

“…For example, the optimization results of pile length show that there is a critical pile length which can achieve the optimal reinforcement effect, and excessive pile length can not increase the factor of safety of the slope but will cause construction waste (Chen et al 2020;Griffiths et al 2010;Shooshpasha and Amirdehi 2015;Won et al 2005). The researches about pile location reveal the fact that the best slope reinforcement effect can be obtained when the anti-slide pile is located in the middle of the slope (Ausilio et al 2001;Cai and Ugai 2000;Hajiazizi et al 2017a;Li et al 2012;Li et al 2020;Zhang et al 2017b), even gave the precise pile location which is 0.2m above the middle of the slope. The studies about optimal pile spacing show that the smaller spacing of the anti-slide pile is, the better integrity of reinforced slope is, which is more conducive to the stability of the reinforced slope (Cai and Ugai 2000;Hajiazizi et al 2017b;Jeong et al 2003;Kourkoulis et al 2011;Sun et al 2016;Zhang et al 2017a), but the determination of pile spacing mainly depends on the soil arching effect between piles in practical engineering.…”

Section: Introductionmentioning

confidence: 99%

A New Multi-objective Comprehensive Optimization Model for Design of Anti-slide Piles

Xue

Cui

et al. 2021

Preprint

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Landslides have posed a huge threat to the ecological environment and human society all over the world. As the most conventional reinforcement method, anti-slide piles are widely used in the reinforcement of slopes. Currently, more and more attentions have been paid to the low-cost and high-efficiency optimal design of anti-slide piles. However, limitations in the method of the optimization design for slope reinforced with piles still exist. In this paper, a new multi-objective comprehensive optimization method was proposed for the optimization of the slope reinforced with anti-slide piles. The factor of safety, internal force and deflection of piles were selected as the optimization indexes and the optimization index weight was determined by integrating the subjective and objective weight. The influence of the pile location, pile length and pile spacing on the reinforcement effect was analyzed by the numerical simulation. Through the simulation case analysis, the proposed model had achieved good effects on the optimization design of anti-slide piles, which could effectively reduce the engineering costs. The optimization results showed that the best reinforcement effect for the homogeneous slope could be obtained when the anti-slide piles with the critical pile length and small pile spacing was located in the middle of the slope. This provides a new solution for the optimization design of other types of complex slopes, and has broad application prospects.

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“…Slope instability is a significant problem in engineering practice and will cause heavy casualties and huge economic losses worldwide [1][2][3]. In the past decades, stability analysis of slopes is one of the most fundamental and written-about topics in geotechnical research, which is classic but continues to be active in the literature [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Stability of Fissured Slopes Reinforced with Anchor Cables under Seismic Action

Zhang

Jiang

et al. 2021

Mathematical Problems in Engineering

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Based on the upper bound theorem of limit analysis (UBLA) combined with the pseudostatic methods, this paper elaborates on a calculated procedure for evaluating fissured slope stability under seismic conditions reinforced with prestressed anchor cables. An existing simple slope case is presented as a case study in this work. The comparison is given to verify that the solution derived from this study is correct and feasible. By means of a numerical optimization procedure, the critical location of the crack is determined from the best upper bound solutions. The results demonstrate a significant influence of the depth of crack and seismic acceleration coefficient on the critical location distribution of the cracks. Meanwhile, the axial force of anchor cables is investigated via parametric studies. It is shown that the variation of the crack depth has little effect on the axial force of anchor cables. Moreover, this paper also illustrates the variation in the axial force of anchor cables under the impact of five marked factors (crack depth, anchor arrangement, anchor inclination angle, slope angle, and seismic conditions). Finally, the required critical length of the free section of anchor cables is determined to ensure the stability of fissured slopes subjected to seismic action.

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Optimal Location of Piles in Stabilizing Slopes Based on a Simplified Double-Row Piles Model

Cited by 25 publications

References 58 publications

Mechanical Behavior and Application of a Novel Supporting and Retaining Structure for Slope

Mechanical Behavior and Application of a Novel Supporting and Retaining Structure for Slope

A New Multi-objective Comprehensive Optimization Model for Design of Anti-slide Piles

Investigation on the Stability of Fissured Slopes Reinforced with Anchor Cables under Seismic Action

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