山区高填路堤强夯快速施工效果研究  

Study on the Effects of Rapid Construction of Dynamic Compaction for High-filled Embankment in Mountainous Areas

作　　者：谭德柱 张留俊[2,3] 李炜[3] 黄亚飞 韩瀛光 TAN Dezhu;ZHANG Liujun;LI Wei;HUANG Yafei;HAN Yingguang(China Railway 11th Bureau Group Second Engineering Co.,Ltd.,Shiyan 442000,Hubei,China;CCCC First Highway Consultants Co.,Ltd.,Xi'an 710065,China;Highway School,Chang'an University,Xi'an 710061,China)

机构地区：[1]中铁十一局集团第二工程有限公司,湖北十堰442000 [2]中交第一公路勘察设计研究院有限公司,西安710065 [3]长安大学公路学院,西安710061

出　　处：《路基工程》2021年第3期115-121,共7页Subgrade Engineering

基　　金：国家重点研发计划(2016YFC0802203)。

摘　　要：依托十堰地区某山区一级公路项目,探索采用松铺层厚4.5 m+4000 kN·m强力夯实的快速施工方法,研究路堤强夯施工的有效加固深度影响范围、土体变形特征及加固效果。运用ABAQUS建立数值计算模型和现场反开挖的方法进行试验,发现数值模拟结果与现场实测数据吻合较好,能较好地反映夯击作用下土体的实际受力状态;土体在4000 kN·m夯击能作用下有效加固影响深度为7.4 m左右,锤间距(中心距)不宜大于5.0 m;而松铺4.5 m试验段部分压实度稍不理想,可在下一层施工时将上下两层夯点错开,以提高夯棱处的压实度。The rapid construction method of dynamic compaction is explored using loose pavement thickness of 4.5 m and 4000 kN·m ramming energy,so as to study the range of influence of effective reinforcement depth,soil deformation characteristics and reinforcement effect of embankment dynamic compaction construction.The numerical calculation model established by ABAQUS and the method of on-site reverse excavation were used for experiments.It is found that the numerical simulation results are in good agreement with the field measured data,so it can better reflect the actual force state of the soil under the action of ramming.According to the analysis,the effective depth of soil reinforcement under the action of 4000 kN·m ramming energy is about 7.4 m,and the hammer spacing(center distance)should not be greater than 5.0 m;and the compaction degree of loose paving 4.5 m test section is not ideal,so the upper and lower compaction points can be staggered during the construction of lower layer,so as to improve the compaction degree at the ramming edge.

关 键 词：土石混填高路堤 填筑层强夯 数值模拟 动应力 有效加固深度 压实度 

分 类 号：U415.6[交通运输工程—道路与铁道工程]