岩土工程学报2026，Vol.48Issue(1)：88-95,8.DOI:10.11779/CJGE20240720
基于潜在滑动面倾角离散的铁路路基重力式挡土墙主动土压力计算方法
Active earth pressure calculation method for gravity retaining wall of railway subgrade based on discretized potential sliding surface inclination angle
摘要
Abstract
The cross-section of the backfill behind railway subgrade gravity retaining walls is trapezoidal,and the backfill is subjected to train loads.General formulas of Coulomb earth pressure theory are not applicable for the determination of the location of dangerous sliding surface and the magnitude of active earth pressure under such complex engineering conditions,making it difficult to perform stability analysis for gravity retaining walls.This paper firstly proposes a method for determining dangerous sliding surfaces based on the limit equilibrium of sliding soil,and calculating the active earth pressure resultant force.According to the principles of equivalent resultant force and equivalent total moment,the force arms of the horizontal and vertical components of active earth pressure are determined.Subsequently,stability analysis of railway subgrade gravity retaining walls considering two failure modes of sliding and overturning is performed.Results show that the proposed method achieves high accuracy with simple calculation principle,less calculation demanding and fewer calculation constraints,and it is recommended to have a step size of 0.01º for the inclination angle change of the sliding surface to ensure high accuracy and efficiency simultaneously.Furthermore,this paper analyzes the impact of parameters e.g.,the distribution of the over load,the width of the overload,the inclination angel of the wall back and the angle of the inner slope and summarizes the influence patterns of these parameters on the magnitude of active earth pressure,the position of active earth pressure,and the safety of different failure modes.关键词
重力式挡土墙/危险滑动面/主动土压力/挡土墙稳定性Key words
gravity retaining wall/dangerous sliding surface/active earth pressure/stability of retaining walls分类
建筑与水利引用本文复制引用
LI Bin,YUAN Jinquan,ZHANG Lianyu,CAO Zijun,YAO Hongxi,CHEN Rong..基于潜在滑动面倾角离散的铁路路基重力式挡土墙主动土压力计算方法[J].岩土工程学报,2026,48(1):88-95,8.基金项目
国家自然科学基金基础科学中心项目(52388102) （52388102）
国家自然科学基金面上项目(52278368) （52278368）
国家自然科学基金区域创新发展联合基金项目(U23A20666) （U23A20666）
四川省自然科学基金面上项目(2024NSFSC0098)This work was supported by National Natural Science Foundation of China(Grant Nos.52388102,52278368 and U23A20666),Natural Science Foundation of Sichuan Province(Grant No.2024NSFSC0098). （2024NSFSC0098）
