东欧某高速公路复理石边坡牵引式滑坡处治分析
Analysis of Traction Landslide Treatment on a Complex Marble Slope of a Motorway in Eastern Europe
詹虎生 1张葆永2
作者信息
- 1. 武汉恒顺通勘察设计有限公司,武汉 430058
- 2. 中交第一公路勘察设计研究院有限公司,西安 710065
- 折叠
摘要
基于东欧某高速公路复理石边坡牵引式工程滑坡,建立30～50 cm厚软弱夹层模拟滑带土的有限元模型,采用强度折减法对滑坡分步施工支护进行稳定性分析,并与传统极限平衡法进行对比.结果表明:强度折减法可根据坡体塑性区分布初步判定滑面位置,结合地质勘察及位移监测确定最终滑面位置;强度折减法滑带土层反分析法确定的滑面抗剪强度参数略高于极限平衡法;同等滑带土参数下,强度折减法施工工况稳定系数略低于极限平衡法,运营及地震工况稳定系数与极限平衡法相当.
Abstract
A finite element model of a 30-50 cm thick weak interlayer simulating the slip zone soil was established based on the traction engineering landslide of a motorway compound marble slope in Eastern Europe.The stability analysis of the step-by-step construction support of the landslide was carried out by the strength reduction method and compared with the traditional limit equilibrium method.The results demonstrate that the strength reduction method can initially identify the location of the slip surface based on the distribution of the plastic zone of the slope.This is then combined with the results of the geological investigation and displacement monitoring to determine the final slip surface location.The shear strength parameter of the slip surface is determined by inverse analysis of the slip zone soil layer.The strength reduction method yields slightly higher results than the limit equilibrium method.When the parameters of the slip zone soil are held constant,the stability coefficient of the strength reduction method for the construction condition is slightly lower than that of the limit equilibrium method,while that of the operational and seismic conditions is comparable to that of the limit equilibrium method.The operational and seismic stability coefficients are comparable with the limit equilibrium method.
关键词
高速公路/复理石滑坡/有限元强度折减法/软弱夹层/岩质滑坡处治Key words
motorway/compound rock landslide/finite element strength reduction method/weak interlayer/rocky landslide treatment引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据