摘要
高填方路堤结构具有沉降量大、沉降不均匀等特点,极易产生路堤病害。为解决此类问题,文中以十巫北高速公路工程为依托,对绢云母片岩土石混合料高填方路堤在不同工况下填筑过程中的变形特征及其规律进行研究。结果表明,在填筑过程中,路堤最大沉降随填筑层厚的增加而增大,而层厚对侧向位移没有明显影响;高填路堤填筑高度与沉降和侧向位移呈正相关,坡脚附近出现了隆起,且隆起值也与填筑高度呈正相关;路堤的沉降和侧向位移随弹性模量的提高逐渐减小,在弹性模量大于15 MPa后,对路堤沉降和侧向位移影响明显变小;路堤的最大沉降量、侧向位移随着路基坡度的减缓而增大;路堤中心沉降和侧向位移随着压实度的增大而减少;现场观测数据验证了模拟的准确性,说明路堤沉降的规律为沉降在前期发展较快,后期逐渐减缓趋于稳定。
The high fill embankment structure has the characteristics of large settlement and uneven settlement,which is easy to cause embankment diseases.In order to solve such problems,based on the Shiyan-Wuxibei Expressway project,the deformation characteristics and laws of the high-fill embankment of sericite rock-soil mixture under different working conditions are studied.The results show that during the filling process,the maximum settlement of the embankment increases with the increase of the thickness of the filling layer,while the thickness of the layer has no obvious effect on the lateral displacement.The filling height of high-filled embankment is positively correlated with settlement and lateral displacement,and uplift occurs near the toe of the slope,and the uplift value is also positively correlated with the filling height.The settlement and lateral displacement of the embankment gradually decrease with the increase of the elastic modulus.When the elastic modulus is greater than 15 MPa,the influence on the settlement and lateral displacement of the embankment is obviously smaller.The lateral displacement of the maximum settlement of the embankment increases with the decrease of the subgrade slope.The settlement and lateral displacement of the embankment center decrease with the increase of compaction degree.The accuracy of the simulation is verified by the field observation data,which shows that the settlement of the embankment develops rapidly in the early stage and gradually slows down and tends to be stable in the later stage.
作者
许孝飞
朱耀光
贺钰涛
王向阳
XU Xiaofei;ZHU Yaoguang;HE Yutao;WANG Xiangyang(Hubei Communications Investment Construction Group Co.,Ltd,Wuhan 430070,China;School of Transportation and Logistics Engineering,Wuhan University of Technology,Wuhan 430063,China)
出处
《交通科技》
2023年第5期10-16,共7页
Transportation Science & Technology
基金
湖北省交通运输科技项目资助。
关键词
高填方路堤
沉降变形
侧向位移
有限元分析
现场监测
high fill embankment
settlement deformation
lateral displacement
finite element analysis
field measurement
