摘要
土拱效应广泛存在于岩土工程中。开展基于透明土的活动门试验,研究填土密实度对土拱效应演化的影响。研究表明,密实度较低的填土,较小的相对位移就可以达到土拱稳定阶段,提高填土密实度有利于土拱效应的发挥;填土密实度对内拱高度无影响,但对外拱有显著影响;相对位移在0~3%时,位移反射率迅速上升,而后逐渐趋稳,提高密实度有利于减弱基地差异沉降向上反射。研究将为填土密实度对土拱演化过程的影响提供参考。
The soil arching effect commonly exists in geotechnical engineering.The trapdoor tests are conducted using transparent soil to study the influences of fill density on the soil arching effect.The results show that under the lower compactness of the fill,the smaller relative displacement can reach the steady stage of soil arching,and improving the compactness of the fill can reinforce the soil arching effect.The fill density has no influences on the height of the inner arch,but significant influences on the outer arch.When the relative displacement is between 0%and 3%,the displacement reflectivity increases rapidly,and then gradually reaches a constant.Improving the fill density is beneficial to weakening the reflection of differential settlement.This study may provide a references for the influence of fill density on the evolution of soil arching.
作者
叶观宝
李凌旭
张振
陶凤娟
程冰男
YE Guan-bao;LI Ling-xu;ZHANG Zhen;TAO Feng-juan;CHENG Bin-nan(Department of Geotechnical Engineering,College of Civil Engineering,Tongji University,Shanghai 200092,China;Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education,Tongji University,Shanghai 200092,China)
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2022年第S02期20-24,共5页
Chinese Journal of Geotechnical Engineering
基金
国家自然科学基金项目(41972272,41772281)
中央高校基本科研业务费专项资金项目(22120190220)
关键词
透明土
土拱效应
填土密实度
活动门试验
transparent soil
soil arching effect
fill density
trapdoor test
作者简介
叶观宝(1964—),男,教授,博士,主要从事地基处理、软土工程与测试技术等方面的教学和科研工作。E-mail:ygb1030@126.com;通信作者:张振,E-mail:dyzhangzhen@126.com
