黄土路堤施工过程中的变形计算分析  

Calculation and Analysis of Deformation during Construction of Loess Embankment

作　　者：陈勇[1] 张红[2] 

机构地区：[1]西安市政设计研究院有限公司,陕西西安710068 [2]中交第一公路勘察设计研究院有限公司

出　　处：《内蒙古公路与运输》2017年第4期16-18,共3页Highways & Transportation in Inner Mongolia

摘　　要：在黄土地基上修筑路堤,研究路堤修筑后(过程中)沉降情况,在西宝公路K81+940~K82+060段埋设了沉降杯,文章采用Duncan-Chang所建议的双曲线弹性非线性E-B模型开展路堤在施工过程中的变形计算分析。结果显示:路堤中部的沉降比与其同一高程处的垂直沉降大,这是因为路堤中部受到的应力比两侧的大。路堤沉降最大约为46mm,出现在路堤顶部以下某处。在整个施工过程中地基的变形占了整个路堤变形的绝大部分,这主要是因为地基土为天然土,它的密度比压实土低的多,其变形模量、泊松比都比压实土小。In order to study the settlement of the embankment on the loess foundation,a settlement cup is buried in the K81 ＋ 940 ~ K82 ＋ 060 section of the Xi-Bao Highway. The article uses the hyperbolic elasticity Nonlinear EB Model proposed by Duncan-Chang Calculation to analyze the deformation of embankment in construction process. The results show that the settlement at the middle of the embankment is larger than the vertical settlement at the same elevation,because the stress in the middle of the embankment is larger than that on both sides. The maximum settlement of the embankment is about 46 mm,which occurs somewhere below the top of the embankment. The deformation of the foundation in the whole construction process accounts for the vast majority of the deformation of the embankment,mainly because the foundation soil is natural soil,its density is much lower than the compaction soil,and its deformation modulus,Poisson ratio is smaller than the compaction soil.

关 键 词：公路工程 黄土 沉降比 双曲线模型 泊松比 

分 类 号：U416.169[交通运输工程—道路与铁道工程]