土木工程与管理学报2017，Vol.34Issue(4)：19-23,38,6.
桩承式路堤土拱效应分析的改进有限元模型
Modified Finite-element Model to Analyze Soil Arching Effect in Piled Embankments
摘要
Abstract
Soil arching effect plays a significant role in load distribution between the pile and subsoil.This paper proposes a modified 3D finite-element model to analyze the soil arching effect.The pile and subsoil are replaced by springs with various stiffness values.The proposed 3D model is simply implemented without pile and subsoil generation, thereby improving efficiency.Furthermore, the reasonability of the numerical model is verified by a field test and conclusions of other scholars.The contrast tests are created by changing the load and fraction angle of the embankment fill.It is found that the critical maximum and minimum heights of the soil arch can also be obtained.Subsoil of various regions are influenced by the soil arching effect in different degree.The height of the equal settlement plane is inconsistent with that of the critical arch height, so soil arching occurs after differential settlement.The stress and settlement distribution are not influenced by the friction angle.With the increase in friction angle of the embankment fill, the settlement decreases efficiently.The conclusions could be a beneficial reference for the designers.关键词
土拱效应/应力分布/临界拱高/沉降差/内摩擦角Key words
soil arching effect/stress distribution/critical arch height/differential settlement/friction angle分类
交通工程引用本文复制引用
杨庆年,郑俊杰,程科,吕东杰..桩承式路堤土拱效应分析的改进有限元模型[J].土木工程与管理学报,2017,34(4):19-23,38,6.基金项目
国家自然科学基金(51278216) （51278216）
河南省科技攻关计划项目(152102310223) （152102310223）
