辽宁工程技术大学学报（自然科学版）Issue(2)：168-171,4.
高速公路拓宽路基病害机理及防治
Damage mechanism and prevention of widened embankment
摘要
Abstract
To analyze the damage mechanism of widened embankments, based on a case of widened Jingshi highway, Fish function in FLAC was used to establish the numerical model of the widened highway embankment in this study. Also, the effects of foundation settlement on the vertical stress, horizontal stress and shear stress in the widened roadbed were investigated. The results show that: tensile stress initially occurs at the top of the widened roadbed. With the development of foundation settlement, the tensile stress zone is also extended and results in the longitudinal cracks in the embankment and pavement; due to different filling height, the uneven vertical additional stress distribution occurs, which causes the transverse differential settlement for the subgrade; concentrated shear stress appears in the middle of the widened embankment, which has little effect on the widened roadbed. The prevention measures for the widened embankment damage are presented.关键词
FLAC/数值分析/高速公路拓宽/拉应力/病害机理/防治措施/剪切应力/不均匀沉降Key words
FLAC/ numerical analysis/ highway widening/ tensile stress/ damage mechanism/ prevention measures/ shear stress/ differential settlement分类
交通工程引用本文复制引用
张春会,吕锦,赵全胜,王锡朝..高速公路拓宽路基病害机理及防治[J].辽宁工程技术大学学报（自然科学版）,2012,(2):168-171,4.基金项目
河北省自然基金资助项目(E2011208036 （）
11215634):河北省交通科技重点资助项目(Y-2009122) （Y-2009122）
