摘要
依托某高速服务区路堑深挖高边坡工程,基于极限平衡软件Slide开展宽台阶位置和宽度的优化,采用FLAC3D开展3种不同开挖方案的数值仿真计算,分析边坡开挖过程中应变和塑性区的发展变化。研究结果表明:宽台阶设置在中部位置对边坡整体稳定性的提高最有利,随着高边坡中部位置台阶宽度的增加,潜在滑面的范围和深度显著减小,逐渐向坡面附近靠近,对深部坡体内的扰动也有所降低;最终高边坡整体破坏随台阶宽度的增加被分成2级,一部分表现为宽台阶上部坡体的整体破坏,另一部分表现为宽台阶下部各坡脚的局部破坏。
Relying on the cutting deep excavation high slope project in the high-speed service area, the optimization of the position and width of wide steps is carried out based on the limit equilibrium software Slide, and the numerical simulation calculation of three different excavation schemes is carried out by using FLAC3D to analyze the development and changes of strain and plastic zone during slope excavation. The research results show that setting the wide step in the middle of the slope is most beneficial to the overall stability of the slope. As the width of the step in the middle of the slope increases, the extent and depth of the potential slip surface decreases significantly, gradually approaching the slope face, and the disturbance within the deep slope is also reduced. Eventually, the overall damage of the slope is divided into two levels with the increase of the step width, with one part showing the overall damage of the upper part of the wide step and the other part showing the local damage of each foot of the lower part of the wide step.
作者
杨潇
周志高
陈依铭
严松
YANG Xiao;ZHOU Zhigao;CHEN Yiming;YAN Song(School of Architecture and Planning,Yunnan University,Kunming,Yunnan 650091,China;State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,Hubei 430071,China)
出处
《施工技术（中英文）》
CAS
2023年第4期24-28,61,共6页
Construction Technology
基金
国家自然科学基金(51608518)。
关键词
边坡
开挖
数值模拟
路堑
高边坡
变形
稳定性
slope
excavation
simulation
cutting
high
deformation
stability
