| 基于离心机模型试验的非饱和土地基沉降特征分析 |
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| 引用本文： | 邹祖银,蒋关鲁,朱占元.基于离心机模型试验的非饱和土地基沉降特征分析[J].地震学刊,2014(1):67-72. |
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| 作者姓名： | 邹祖银 蒋关鲁 朱占元 |
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| 作者单位： | [1]西南交通大学土木工程学院,成都610031 [2]四川农业大学城乡建设学院,四川都江堰611830 |
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| 基金项目： | 铁道部科技研究开发计划项目（2010G003-F）资助 |
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| 摘 要： | 非饱和土结构复杂,沉降理论计算还不完善,导致地基沉降的计算值与沉降实测值往往有较大的差异。地基沉降是高速铁路客运专线路基的主要控制因素之一,通过离心机模型试验,对高速铁路非饱和土地基沉降特征进行分析,获得地基的荷载—沉降—时间关系曲线。研究结果表明：非饱和土地基在路基填筑期沉降完成较快,施工期可完成总沉降的75%,经过5~6个月短期放置可完成总沉降的90%左右,其工后沉降满足无砟轨道沉降控制要求,该研究结果可为非饱和土沉降理论分析提供参考。
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| 关 键 词： | 非饱和土 高速铁路 离心机模型试验 地基沉降 |
Analysis of Unsaturated Soil Foundation Settlement Characteristics Based on Centrifuge Model Test |
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| ZOU Zu-yin,＇,JIANG Guan-lu,ZHU Zhan-yuan.Analysis of Unsaturated Soil Foundation Settlement Characteristics Based on Centrifuge Model Test[J].Journal of Seismology,2014(1):67-72. |
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| Authors: | ZOU Zu-yin ＇ JIANG Guan-lu ZHU Zhan-yuan |
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| Institution: | 2 (1. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, Chinas 2. College of Urban and Rural Construction, Sichuan Agricultural University, Du Jiangyan 611830, China) |
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| Abstract: | The theory about the unsaturated soil is imperfect, and the settlement calculating method for the unsaturated soil is not mature because of the complexity of the unsaturated soil, foundation settlement calculation value and the measured values tend to have large difference so foundation settlement has become one of the main control factors for high-speed railway subgrade of passenger train special line. For unsaturated soil settlement problem, we analysis the charac- teristics of unsaturated soil foundation settlement of high-speed railway and obtain the load-set- tlement-time curve through centrifuge model test. Research results show that the unsaturated soil foundation has faster settlement in subgrade filling period, which complete 75 % of the total settlement during the construction and after 5-6 months short-term placement can amount to a- bout 90% of the total settlement. The post-construction settlement can satisfy control require- ments. In this paper, the results can provide a test basis for the theory of unsaturated soil settle- ment calculation. |
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| Keywords: | unsaturated soil high-speed railway centrifuge modeling test foundation settlement |
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