| 振冲碎石桩处治粉砂性湿软地基研究 |
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| 引用本文： | 袁玉卿,刘松利,刘绍宁,冯明硕,邵慧君.振冲碎石桩处治粉砂性湿软地基研究[J].河南大学学报(自然科学版),2011(5). |
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| 作者姓名： | 袁玉卿 刘松利 刘绍宁 冯明硕 邵慧君 |
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| 作者单位： | 河南大学土木建筑学院;郑州大学新型建材与结构研究中心;开封市公路管理局;开封市通达公路勘察设计有限公司; |
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| 基金项目： | 河南省交通运输厅科技项目(2010PII10); 河南省教育厅自然科学研究计划项目(2011A580001) |
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| 摘 要： | 为了提高粉砂性湿软地基的承载能力,采用振冲碎石桩进行处治.基于Drucker-Prager模型,应用数值分析软件对实际工程中加固后的不同填高路基及不同桩径、不同桩间距的碎石桩复合地基进行数值模拟.结果表明,随着碎石桩桩径的增大、桩间距的减小,振冲碎石桩能减少路基沉降量,最大减小量分别为31.4 mm和23.4 mm,但坡脚的水平位移增大;随着路基填高和桩间距的增大,碎石桩复合地基坡脚的水平位移减小.综合分析认为,当桩径为0.5 m且桩间距为1.5 m时,较为经济合理.
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| 关 键 词： | 振冲碎石桩 粉砂土 湿软地基 有限元 沉降控制 水平位移 |
A Study on Treating Wet and Soft Sandy Silt Subgrade by Using Vibro-Replacement Stone Column |
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| YUAN Yu-qing,LIU Song-li,LIU Shao-ning,FENG Ming-shuo,SHAO Hui-juan.A Study on Treating Wet and Soft Sandy Silt Subgrade by Using Vibro-Replacement Stone Column[J].Journal of Henan University(Natural Science),2011(5). |
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| Authors: | YUAN Yu-qing LIU Song-li LIU Shao-ning FENG Ming-shuo SHAO Hui-juan |
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| Institution: | YUAN Yu-qing1,2,LIU Song-li1,LIU Shao-ning3,FENG Ming-shuo4,SHAO Hui-juan1(1.School of Civil Engineering and Architecture,Henan University,Kaifeng 475004,China,2.Research Center of New Style Building Material and Structure,Zhengzhou University,Zhengzhou 450002,3.Highway Administration of Kaifeng,Kaifeng 475003,4.Kaifeng Tongda Highway Investigation and Design Co.Ltd,China) |
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| Abstract: | In order to improve the bearing capacity silty of sand soft ground,vibro-replacement stone column was used to strengthen it.Based on Drucker-Prager model,the reinforcement of vibro-replacement stone column composite foundation of different height of roadbed,different pile diameter and pile spacing were respectively simulated with the numerical analysis software.Results showed that with the increase of pile diameter,spacing and decreasing vibro-replacement stone column the maximum of roadbed subsidence reduc... |
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| Keywords: | vibro-replacement stone column sandy silt wet and soft foundation finite elements settlement control horizontal displacement |
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