| 列车振动荷载作用下南京细砂累积变形预测公式对比分析 |
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| 引用本文： | 沈礼伟,庄海洋,陈磊,李浩.列车振动荷载作用下南京细砂累积变形预测公式对比分析[J].岩土力学,2014,35(11):3170-3176. |
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| 作者姓名： | 沈礼伟 庄海洋 陈磊 李浩 |
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| 作者单位： | 1.南京工业大学 岩土工程研究所，南京 210009；2.江苏省交通规划设计院股份有限公司，南京 210005 |
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| 基金项目： | 江苏省自然科学基金青年项目（No. SBK201241288）；江苏省研究生科研创新计划项目（No. CXLX12_0436）。 |
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| 摘 要： | 列车振动荷载引起的路基长期沉降问题一直是影响列车正常运营的重要因素。首先，采用GDS空心圆柱扭剪仪对新近沉积的南京细砂重塑样进行循环三轴试验研究。在该基础上，通过总结国内外学者研究的累积变形模型公式，并与试验数据进行对比，分析了已有多种公式应用于南京细砂动力累积变形的预测时的可行性，给出了相关预测公式的模型参数参考值。根据试验结果，考虑试验围压对土体累积变形的影响规律，对部分公式进行了初步修正，扩大了相关预测公式的使用范围。研究成果对长江中下游轨道交通路基的长期沉降预测具有一定的指导意义和参考价值。
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| 关 键 词： | 南京细砂 列车振动 累积变形 预测公式 |
| 收稿时间： | 2014-04-12 |
Prediction formula for dynamic accumulated deformation of Nanjing fine sand under train-induced vibration load |
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| SHEN Li-wei,ZHUANG Hai-yang,CHEN Lei,LI Hao.Prediction formula for dynamic accumulated deformation of Nanjing fine sand under train-induced vibration load[J].Rock and Soil Mechanics,2014,35(11):3170-3176. |
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| Authors: | SHEN Li-wei ZHUANG Hai-yang CHEN Lei LI Hao |
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| Institution: | 1. Institute of Geotechnical Engineering, Nanjing University of Technology, Nanjing 210009, China; 2. Jiangsu Provincial Communications Planning and Design Institute Co., Ltd., Nanjing 210005, China |
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| Abstract: | A cumulative deformation forecast model can predict long-term settlement of sand under the train-induced vibration load and has a great practical value in engineering practice. Based on cyclic triaxial experiment on the remolded samples of Nanjing fine sand using GDS (geotechnical digital systems) dynamic hollow cylinder torsional apparatus, the article analyzes sand characteristics of accumuted deformation, summarizes current studies on a cumulative deformation model formula at home and abroad, and compares the different formulae results with the experiment data; finally finds the most suitable model formula for Nanjing fine sand. Through comparison and analysis, the formula of logarithm model, of which the parameters are determined, has been found having a good application effect on a cumulated deformation prediction of Nanjing fine sand. |
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| Keywords: | Nanjing fine sand train-induced vibration accumulated deformation prediction formula |
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