A simplified method to analyze the load on composite retaining structures based on a novel soil arch model
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ORIGINAL PAPER
A simplified method to analyze the load on composite retaining structures based on a novel soil arch model Xiaoyan Zhao 1 & Kunpeng Li 1 & Dian Xiao 1 Received: 3 June 2019 / Accepted: 20 March 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Soil arch effect has been widely used in the determination of pile spacing, whereas its application on the design of composite retaining structures to stabilize potentially unstable slopes is still rare. As a typical composite retaining structure, stabilizing piles combined retaining wall could effectively avoid slope failure, while the problem of evaluating the load distribution between stabilizing piles and retaining wall based on soil arch effect remains to be solved. In this paper, a novel soil arch model is proposed and used aiming to theoretically analyze the soil arch effect on the load against stabilizing piles and retaining wall. The results show that the load acting on stabilizing piles should be the residual sliding force derived from rear soil mass, and the load against retaining wall should be the maximum value between the Coulomb’s active earth pressure derived from sliding wedge before soil arch and the residual sliding force produced by front soil mass. Then, on this basis, a simplified method for calculating the load on stabilizing piles and retaining wall respectively considering the soil arch effect is put forward. A railway cutting slope reinforced with stabilizing piles combined with retaining wall is taken as an application case, and the simplified method is adopted to quantitatively analyze the soil arch effect on the load distribution between stabilizing piles and retaining wall. The conclusion of this paper would provide useful help toward the process of safer and more economical design of composite retaining structures in slope engineering harness. Keywords Simplified method . Soil arch model . Composite structure . Stabilizing pile . Retaining wall . Load distribution
Introduction With the rapid development of infrastructure construction in mountainous regions, excavation of cutting slope has become a crucial cause for excessive slope movement and slope failure (Ehrlich and Silva 2015; Ersöz and Topal 2018; Hu and Ma 2018; Mohammadi and Taiebat 2016). Currently, it is widely accepted that stabilizing pile is an effective measure to ensure the stability of cutting slope (Galli and di Prisco 2013; Li et al. 2019; Lirer 2012; Qin et al. 2017; Xiao et al. 2017; Zhang et al. 2018). Claystone is known worldwide as a problematic rock mass with poor engineering properties, triggering many geological hazards (Alejano et al. 2010; Aydin et al. 2004;
* Xiaoyan Zhao [email protected] 1
Department of Geology Engineering, Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, 999 Xi’an Road Pi County, Chengdu 611756, Sichuan, China
Rincon et al. 2016; Yilmazer et al. 2003; Zhang et al. 2017). Especially in southwest China, claystone slope reinforced with stabilizing piles frequently suffer
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