摘要
基于杭州至海宁城际铁路工程盐官车辆基地深厚软土的软基处理工程,设计了3组深厚软土桩—网复合地基室内模型试验,研究了新型加筋材料作用下地基的整体沉降、桩土差异沉降、软土地基孔隙水压力、桩土应力比、桩身轴力等变化规律。研究表明:(1)桩—网复合地基可有效控制深厚软土地基沉降与桩土差异沉降;(2)聚乙烯三向拉伸土工格栅有利于软土地基孔隙水压的消散;(3)聚乙烯三向拉伸土工格栅将上部荷载传递至桩顶,使桩土应力比与桩身轴力显著增大,以提高软土地基的承载性能。
Based on the soft-based treatment project of the deep soft soil of the salt official vehicle base of the Hangzhou-Haining intercity railway project,this paper designs three sets of deep soft soil piles-net composite foundation indoor model tests,and studies the changes of the overall subsidence of the foundation under the action of the new reinforcing material,the settlement of pile soil difference,the water pressure of the soft land base pore,the pressure ratio of pile soil,and the cushion shaft force.The research shows that:(1)pile-net composite foundation can effectively control the deep soft land base subsidence and pile soil difference settlement;(2)Polyethylene three-directional stretchgeogrid is conducive to the dispersal of soft land base pore water pressure;(3)Polyethylene three-directional stretch geotechnical grille will be the upper load to the top of the pile,so that the pile soil stress ratio and pile shaft force significantly increased,in order to improve the carrying performance of the soft land base.
作者
陈景榜
许四法
王哲
娄可栋
Chen Jingbang;Xu Sifa;Wang Zhe;Lou Kedong(College of Architecture Engineering,Zhejiang University of Technology,Hangzhou 310014,China)
出处
《科技通报》
2020年第12期45-49,共5页
Bulletin of Science and Technology
关键词
桩—网复合地基
有限元分析
差异沉降
桩土应力比
pile-net composite foundation
fintomeelement analysis
differential settlement
pile soil stress ratio
