碎石桩加固铁路路堤液化地基孔压变化的模型试验研究

英文篇名：Study on Model Test for Pore Pressure Changes inside Liquefied Foundation of Railway Subgrade Consolidated with Gravel Pile
中文刊名：路基工程
英文刊名：Subgrade Engineering
作者：李能 ; 曹新文
英文作者：LI Neng1 ; CAO Xin-wen2(1.Kunming Survey ; Design and Research Institute Co. ; Ltd.of CREEC ; Kunming 650011 ; China ; 2.Southwest Jiaotong University ; Chengdu 610031 ; China)
中文关键词：铁路路基 ; 液化地基 ; 孔压 ; 振动台模型试验
英文关键词：railway subgrade ; liquefied foundation ; pore pressure ; shaking table model test
出版日期：2012-08-20
机构：中铁二院昆明勘察设计研究院有限责任公司;西南交通大学;
年：2012
期：04
出版单位：路基工程

摘要

以玉蒙铁路碎石桩加固处理路堤液化地基为工程背景,采用水平振动模拟地震荷载进行了碎石桩复合地基路基的振动台模型试验,试验测试了不同位置的孔压,对孔压的时程、分布特点和孔压比的变化进行了分析。水平加速度为0.3 g时,路堤坡脚以外地基产生液化,而路堤范围内未出现液化。采用碎石桩复合地基加固铁路液化地基时,需适当加宽加固地基的宽度。
As the case of the liquefied foundation consolidated with gravel pile along Yuxi-Mengzi Railway,shaking table model test for the subgrade with gravel pile composite foundation is carried out through simulating seismic load by horizontal vibration,in which the pore pressures at different positions are tested as well as the time interval,distribution characteristics and change of pore pressure ratio are analyzed.When the horizontal acceleration is 0.3g,the foundation outside the toe of the embankment is liquefied while that inside the range of embankment is not.Where liquefied foundation of railway is consolidated with gravel pile composite foundation,the width of the foundation needs to be widened and reinforced.

引文

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