摘要
为解决高液限土路基填筑中弯沉难控制的问题,根据刚度补偿理论和弯沉等效原则,以弯沉为控制目标,提出高液限土路基弯沉控制方法。该方法以下路堤回弹模量、路基各层顶面回弹模量和填筑厚度为计算参数,通过理论计算得到各层填料所需的材料模量,结合室内试验结果选择合适的填料,确定路基弯沉控制的填筑方案,并可根据路基现场施工效果动态调整。以海南省内国道G360公路为依托工程,依据该方法制订方案,铺筑试验路,并进行现场试验验证。结果表明,路基顶面弯沉满足验收要求,且与验收值误差较小。该方法可有效控制路基弯沉,指导高液限土路基施工与质量控制。
In order to solve the problem that it is difficult to control the deflection in high liquid limit soil subgrade filling,according to the stiffness compensation theory and deflection equivalent principle,taking the deflection as the control objective,the deflection control method is proposed.In this method,the resilient modulus of lower embankment,the resilient modulus of each layer top surface in subgrade and the filling thickness were taken as the calculation parameters.The material modulus required for fillers in each layer was obtained by theoretical calculation,and the appropriate filler was selected according to laboratory test results.The filling scheme of subgrade deflection control can be determined,and it can be dynamically adjusted according to subgrade construction effect.Taking Hainan National Highway G360 as case history,the test road was paved according to the proposed method,and the field test was carried out.The results show that the subgrade top deflection meets the acceptance requirements and the discrepancy is marginal.This method can effectively control the subgrade deflection,and guide the construction and quality control of high liquid limit soil subgrade.
作者
张锐
成先阳
曾重驰
任天锃
刘闯
ZHANG Rui;CHENG Xianyang;ZENG Chongchi;REN Tianzeng;LIU Chuang(School of Traffic and Transport Engineering,Changsha University of Science&Technology,Changsha 410114,P.R.China;International College,Changsha University of Science&Technology,Changsha 410114,P.R.China;Department of Traffic and Transportation of Hainan Province,Haikou 570204,P.R.China)
出处
《土木与环境工程学报（中英文）》
CSCD
北大核心
2023年第1期63-69,共7页
Journal of Civil and Environmental Engineering
基金
国家重大科研仪器研制项目(51927814)
交通运输部公路工程行业标准制修订项目(JTG-201507)
长沙理工大学研究生科研创新项目(CX2020SS15)
国家大学生创新创业训练计划(202010536006)。
关键词
高液限土
路基
弯沉控制
回弹模量
high liquid limit soil
subgrade
deflection control
resilient modulus
