强夯设计参数对高填方粉土路堤加固效果研究  

Study on Improvement Effect of Dynamic Compaction Design Parameters on High Fill Silt Road Embankment

作　　者：王一丁 于坤 张冉 王健 李景磊 姚占勇 王勇 

机构地区：[1]济南市政公用资产管理运营有限公司,山东 济南 [2]山东省交通规划设计院集团有限公司,山东 济南 [3]山东大学齐鲁交通学院,山东 济南

出　　处：《土木工程》2022年第5期737-749,共13页Hans Journal of Civil Engineering

摘　　要：建立高填方粉土路堤强夯ABAQUS有限元分析模型,并以山东地区某高速公路高填方粉土路堤强夯加固试验路为依托对该模型进行验证,研究强夯施工设计参数对高填方粉土路堤加固效果的影响。以路堤底部达到90%压实度为有效加固指标,采用1500 kN∙m夯击能、夯点间距3.2 m、夯击10次的设计参数可对4 m高粉土路堤进行有效加固;同时优选7000 kN∙m夯击能开展8 m高粉土路堤强夯加固试验,以达到90%压实度的加固区域作为路堤强夯的有效加固范围,该高度松填粉土路堤的建议强夯设计参数为:夯击能7000 kN∙m、夯间距5.2 m、夯击次数14次。The ABAQUS finite element analysis model of dynamic compaction was established, and the model was verified based on the dynamic compaction reinforcement test road of an expressway in Shandong province, and the influence of construction design parameters of dynamic compaction on the reinforcement effect of high-fill silt road embankment was studied. With 90% compaction at the bottom of embankment as the effective reinforcement index, 4 m high silt soil embankment can be effectively strengthened by using the tamping energy of 1500 kN∙m, the distance between tamping points of 3.2 m and 10 times of tamping. At the same time, the compaction capacity of 7000 kN∙m is selected to carry out the dynamic compaction reinforcement test of 8 m high silt soil embankment, and the reinforcement area with 90% compaction degree is taken as the effective consolidation range of embankment dynamic compaction. The recommended dynamic compaction design parameters of this highly loose filled silt soil embankment are: compaction energy is 7000 kN∙m, compaction interval is 5.2 m, and 14 times compaction.

关 键 词：强夯 高填方路堤 粉土 加固效果 

分 类 号：U416[交通运输工程—道路与铁道工程]