Pseudo-static internal stability analysis of geosynthetic-reinforced earth slopes using horizontal slices method

IF 1.7 Q3 ENGINEERING, GEOLOGICAL
Saeed Aroni. Hesari, Sina Javankhoshdel, M. Payan, R. Chenari
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引用次数: 4

Abstract

ABSTRACT In this study, the well-established pseudo-static approach along with the horizontal slices method (HSM) is employed to investigate the seismic internal stability of geosynthetic-reinforced earth slopes. Previous simple HSM analyses were based on a primary assumption stating that the normal inter-slice forces are exerted on the mid-length of horizontal sections. However, this simplifying assumption could give rise to substantial errors in the calculation of design parameters, specifically in the case of high seismic excitations or low soil strength parameters. To address this deficiency, a balancing moment is considered as a new variable to account for the corresponding eccentricity. In the current HSM, two sets of unknown variables, including horizontal inter-slice forces and shear forces along failure surface, are determined using the well-known λ coefficient and the Mohr-Coulomb failure criterion. In this new technique, the traditional ‘5N-1ʹ type of HSM analysis is reduced to a robust and rigorous ‘3N’ one with the same predictive capability. The influence of various parameters, including soil characteristics, slope geometry and different earthquake coefficients are rigorously examined. Moreover, a number of useful graphs is provided to help engineers in the preliminary seismic design of geosynthetic-reinforced earth slopes.
用水平切片法分析土工合成加筋土边坡的拟静力内部稳定性
摘要在本研究中,采用公认的拟静力方法和水平切片法(HSM)来研究土工合成材料加筋土坡的地震内部稳定性。以前的简单HSM分析基于一个主要假设,即法向层间力施加在水平截面的中间长度上。然而,这种简化假设可能会在设计参数的计算中产生重大误差,特别是在高地震激励或低土壤强度参数的情况下。为了解决这一不足,平衡力矩被视为一个新的变量,以解释相应的偏心率。在目前的HSM中,使用众所周知的λ系数和莫尔-库仑破坏准则确定了两组未知变量,包括沿破坏面的水平层间力和剪切力。在这项新技术中,传统的“5N-1”型HSM分析被简化为具有相同预测能力的稳健而严格的“3N”分析。严格检查了各种参数的影响,包括土壤特性、边坡几何形状和不同地震系数。此外,还提供了一些有用的图表,以帮助工程师进行土工合成材料加筋土坡的初步抗震设计。
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来源期刊
CiteScore
3.80
自引率
0.00%
发文量
27
期刊介绍: Geomechanics is concerned with the application of the principle of mechanics to earth-materials (namely geo-material). Geoengineering covers a wide range of engineering disciplines related to geo-materials, such as foundation engineering, slope engineering, tunnelling, rock engineering, engineering geology and geo-environmental engineering. Geomechanics and Geoengineering is a major publication channel for research in the areas of soil and rock mechanics, geotechnical and geological engineering, engineering geology, geo-environmental engineering and all geo-material related engineering and science disciplines. The Journal provides an international forum for the exchange of innovative ideas, especially between researchers in Asia and the rest of the world.
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