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循环荷载作用下水泥土桩复合地基的临界循环应力比和永久变形分析
引用本文:白顺果,侯永峰,张鸿儒.循环荷载作用下水泥土桩复合地基的临界循环应力比和永久变形分析[J].岩土工程学报,2006,28(1):84-87.
作者姓名:白顺果  侯永峰  张鸿儒
作者单位:北京交通大学土建学院;北京交通大学土建学院 北京100044;河北农业大学城建学院;河北保定071001;北京100044;
摘    要:通过循环荷载作用下水泥土桩复合地基的室内模型试验,考虑复合地基的垫层、加固层以及下卧层的相互作用,研究了循环荷载作用下水泥土桩复合地基的竖向永久变形发展情况,考虑了复合地基的固结状态、循环应力比的大小及加荷频率对竖向永久变形的影响,得到了水泥土桩复合地基的临界循环应力比和竖向永久变形随加荷周数、加荷频率和固结状态而变化的规律,对于控制复合地基的工后沉降具有重要的参考价值。

关 键 词:复合地基  模型试验  循环荷载  临界循环应力比  永久变形  
文章编号:1000-4548(2006)01-0084-04
收稿时间:2004-11-16
修稿时间:2004-11-16

Analysis on critical cyclic stress ratio and permanent deformation of composite foundation improved by cement-soil piles under cyclic loading
BAI Shun-guo,HOU Yong-feng,ZHANG Hong-ru.Analysis on critical cyclic stress ratio and permanent deformation of composite foundation improved by cement-soil piles under cyclic loading[J].Chinese Journal of Geotechnical Engineering,2006,28(1):84-87.
Authors:BAI Shun-guo  HOU Yong-feng  ZHANG Hong-ru
Affiliation:1.College of Civil Engineering Beijing Jiaotong University Beijing 100044 China 2.College of Urban and Rural Construction Agricultural University of Hebei Baoding 071001 China
Abstract:Through model tests on composite foundation of cement-soil piles under cyclic loading, and with interaction of cushion, reinforced zone and sublayer being taken into account, the vertical permanent deformation of composite foundation of cement-soil piles under cyclic loading was studied and the influences of consolidation states, cyclic stress ratio and vibration frequency were considered. The variation rule of critical cyclic stress ratio and vertical permanent deformation with numbers of loading cycles, vibration frequency and consolidation states were obtained. These results were siginificant to control the settlement of composite foundation.
Keywords:composite foundation  model test  cyclic loading  critical cyclic stress ratio  permanent deformation
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