Investigation of internal force of anti-slide pile on landslides considering the actual distribution of soil resistance
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Investigation of internal force of anti‑slide pile on landslides considering the actual distribution of soil resistance acting on anti‑slide piles Xiaoyan Liu1 · Guojun Cai1 · Lulu Liu1 · Zhijun Zhou2 Received: 15 April 2019 / Accepted: 23 April 2020 © Springer Nature B.V. 2020
Abstract Frequent landslides have generated huge security threats and economic losses all over the world. As an important anti-slip retaining structure, anti-slide piles can maintain the slope stability. The distribution of soil resistance acting on piles is the critical factor influencing the design of anti-slide piles, and the method of calculating the internal force is directly related to the landslide treatment and construction cost. However, limitations in the method of calculating the internal force of anti-slide piles still exist. In this paper, the influence of the internal force of anti-slide piles both considering and ignoring the soil resistance acting on the piles was verified using ABAQUS software, revealing that the soil resistance indeed had a significant effect on the anti-slide piles, especially when the gradient of the soil before piles was less than 40°. Therefore, the formula for calculating the internal force of anti-slide piles was proposed considering the soil resistance. Based on this formula, the optimum quantity of steel reinforcement and the safety factor were compared in practical slope engineering. This proposed formula considering actual distribution of soil resistance can be used for approximate calculation for anti-slide piles, which can reduce the construction cost, especially in large and neutral landslide engineering. Keywords Anti-slide pile · Soil resistance acting on piles · Actual distribution · Numerical validation · Calculation of internal force
* Guojun Cai [email protected] Xiaoyan Liu [email protected] Lulu Liu [email protected] Zhijun Zhou [email protected] 1
Institute of Geotechnical Engineering, Southeast University, Nanjing 211189, China
2
Chang’an University, Xi’an 710054, China
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Natural Hazards
1 Introduction As the most common problem in engineering, landslides have seriously affected traffic safety and people’s lives (Hassiotis et al. 1997; Guo and Qin 2010; Yazdanpanah et al. 2016). Therefore, experienced geotechnical engineers try to provide a reasonable design and reinforcement to overcome stability problems (Ito et al. 1981; Poulos 1995). Many measures have been put forward in the study of landslide prevention and control. Antislide piles are widely applied as an important structure to prevent landslides and in slope engineering generally (Popov and Okatov 1980; Poulos 1995; Yazdanpanah et al. 2016). However, the calculation method for anti-slide piles still has some limitations. According to actual engineering practice in a large number of anti-slide pile design cases, the distribution of soil resistance acting on the piles is often ignored (considering only the landslide thrust), so that the calculation results are inconsistent with
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