许漯高速公路微型夯扩碎石桩加固路基变形的弹塑性分析  

Elasto-plastic Analysis of Deformation of Micro Rammed Gravel Pile Reinforced Subgrade in Xuchang-Luohe Highway

作　　者：周敏[1] 王忠福[1] 张旭柱 

机构地区：[1]华北水利水电学院,郑州450011 [2]国家电力公司北京勘察设计研究院,北京100024

出　　处：《路基工程》2011年第3期29-32,共4页Subgrade Engineering

基　　金：华北水利水电学院青年科研基金(HSQJ2009026)

摘　　要：应用弹塑性有限差分法,考虑桩土相互作用及协调,建立许漯高速公路微型夯扩碎石桩加固路基的三维弹塑性有限差分计算模型,研究微型夯扩碎石桩加固路基的变形特性。分析了桩间土模量、桩长及面积置换率等参数的变化对复合地基沉降、桩端沉降及桩土应力比的影响。通过计算获得了微型夯扩碎石桩复合地基的沉降规律,为微型夯扩碎石桩加固高速公路路基的设计和沉降计算提供必要的前提条件。Considering pile-soil interaction and coordination,three-dimensional elastoplastic finite difference model of micro rammed gravel pile reinforced subgrade in Xuchang-Luohe Highway is established using elastoplastic finite difference method to study the deformation characteristics of micro rammed gravel pile reinforced subgrade.The modulus of soil among piles,pile length and area displacement ratio are analyzed on the influence of composite foundation settlement,pile tip settlement and pile-soil stress ratio.The settlement rules of micro rammed gravel pile reinforced subgrade has been obtained through calculation,which provided necessary precondition for design and settlement calculation of micro rammed gravel pile reinforced subgrade.

关 键 词：微型夯扩碎石桩 软土路基 FLAC3D 沉降规律 桩土相互作用 弹塑性 

分 类 号：TU472.35[建筑科学—结构工程]