一种新分块填筑施工法对软土路基的沉降影响  

The effect of a new block filling construction method on the settlement of soft soil subgrade

作　　者：雷倪铭 郭成 林撼 阙云[2] 邓泽庭 杨枫 LEI Niming;GUO Cheng;LIN Han;QUE Yun;DENG Zeting;YANG Feng(Huadong Engineering(Fu Jian)Corporation Limted Co.,Ltd.,Fuzhou 350003,China;Fuzhou University,Fuzhou 350116,China;Fujian Universtiy Of Technology,Fuzhou 350108,China)

机构地区：[1]华东勘测设计院(福建)有限公司,福建福州350003 [2]福州大学,福建福州350116 [3]福建理工大学,福建福州350108

出　　处：《粘接》2024年第11期159-162,共4页Adhesion

摘　　要：为解决软土地基具有较高的压缩性,孔隙水压力消散慢,地基稳定性差问题,基于反压护道原理,提出一种新的填筑施工方法——分块填筑法。通过有限元分析对比分块、传统分层2种填筑方式在路基路面的竖向沉降、水平位移、孔隙压力等方面的差异,并分析分块垛尺寸对路基顶面竖向位移的影响。研究表明,分块填筑能够有效减小路基顶面最大沉降值,分块垛越高、越宽路基顶面的竖向位移越小;分块填筑法对于路基顶面的水平位移影响不大,但能有效减小坡脚下方的水平位移、竖向位移以及孔隙压力。In order to solve the problems of high compressibility,slow dissipation of pore water pressure and poor stability of soft soil foundation,a new filling construction method was proposed,which was based on the principle of backpressure protection.The differences in vertical settlement,horizontal displacement and pore pressure of the roadbed pavement between the two filling methods of split block and conventional layering were investigated by the finite element software ABAQUS,and the influence of the size of the split stack on the vertical displacement of the top surface of the roadbed was further analyzed.The results showed that block filling could effectively reduce the maximum settlement value of the top surface of the roadbed,and the higher and wider the block stack,the smaller the vertical displacement of the top surface of the roadbed.The block filling method had little effect on the horizontal displacement of the top surface of the roadbed,but it could effectively reduce the horizontal displacement below the foot of the slope,the vertical displacement and the pore pressure.

关 键 词：路基填筑 软土路基 反压护道 分块填筑 

分 类 号：TQ172.42[化学工程—水泥工业] U416[化学工程—硅酸盐工业]