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基于加速应力试验方法的气泡混合轻质土使用寿命估计研究

刘鑫, 甘亮琴, 盛柯, 洪宝宁

刘鑫, 甘亮琴, 盛柯, 洪宝宁. 基于加速应力试验方法的气泡混合轻质土使用寿命估计研究[J]. 岩土工程学报, 2017, 39(10): 1793-1799. DOI: 10.11779/CJGE201710006
引用本文: 刘鑫, 甘亮琴, 盛柯, 洪宝宁. 基于加速应力试验方法的气泡混合轻质土使用寿命估计研究[J]. 岩土工程学报, 2017, 39(10): 1793-1799. DOI: 10.11779/CJGE201710006
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LIU Xin, GAN Liang-qin, SHENG Ke, HONG Bao-ning. Experimental study on service life of foamed mixture lightweight soil based on method of accelerated stress tests[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(10): 1793-1799. DOI: 10.11779/CJGE201710006
Citation: LIU Xin, GAN Liang-qin, SHENG Ke, HONG Bao-ning. Experimental study on service life of foamed mixture lightweight soil based on method of accelerated stress tests[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(10): 1793-1799. DOI: 10.11779/CJGE201710006
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基于加速应力试验方法的气泡混合轻质土使用寿命估计研究  English Version

  • 1. 河海大学岩土力学与堤坝工程教育部重点实验室,江苏 南京 210098;
    2. 江苏省岩土工程技术工程研究中心（河海大学）,江苏 南京 210098;
    3. 河海大学隧道与地下工程研究所,江苏 南京 210098;
    4.河海大学岩土工程科学研究所,江苏 南京 210098

基金项目: 国家自然科学基金青年基金项目（51609071）; 江苏省自然科学基金青年基金项目（BK20140848）; 广东省交通运输厅科技项目（科技-2015-02-013）
详细信息
    作者简介:

    刘 鑫(1984- ),男,副教授,博士,主要从事岩土微细结构试验与损伤研究。E-mail: liuxin100@hhu.edu.cn。

  • 中图分类号: TU525

Experimental study on service life of foamed mixture lightweight soil based on method of accelerated stress tests

  • 1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China;
    2. Jiangsu Research Center for Geotechnical Engineering Technology, Hohai University, Nanjing 210098, China;
    3. Tunnel and Underground Engineering Institute, Hohai University, Nanjing 210098, China;
    4. Geotechnical Research Institute, Hohai University, Nanjing 210098, China

摘要

    摘要
  • 摘要: 基于加速应力试验方法,借助概率统计理论分析了以水泥、水和气泡群为组成材料的气泡混合轻质土疲劳寿命的特点及其分布,建立了气泡混合轻质土的线性化疲劳方程,预测了气泡混合轻质土在正常车辆荷载作用下的使用寿命。研究结论表明：通过不同加速应力下疲劳寿命的平均值、标准差和变异系数3个指标判别,同一应力下的气泡混合轻质土的疲劳寿命离散性较小,离散程度随着加速应力的增大而增大;基于加速应力试验结果线性回归分析,证明气泡混合轻质土疲劳寿命服从对数正态分布;建立了气泡混合轻质土的疲劳寿命方程,表明疲劳寿命的对数是加速应力的递减函数;估计了正常车辆荷载作用下气泡混合轻质土的平均使用寿命约为73 a。
    Abstract: Based on the method of accelerated stress tests, the characteristics and distribution of fatigue life of foamed mixture lightweight soil (FMLS) which consists of cement, water and bubble are analyzed with the help of probability and statistics theory. The linear fatigue equation for FMLS is established based on a series of unbiased estimations. At the same time, the service life of FMLS under normal traffic load is predicted. The research results indicate that the fatigue life of FMLS under identical traffic load is considered to have small discreteness according to the three indices of average value, standard deviation and variable coefficient, but the discrete degree increases with the increase of the accelerated stress. The results of linear regression indicate that the fatigue life of FMLS obeys the lognormal distribution. The fatigue life equation for FMLS is established, and the logarithm of fatigue life of FMLS proves to decrease with the increase of the accelerated stress according to the fatigue equation. Finally, the average service life of FMLS under normal traffic load is predicted to be about 73 years.
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    • 参考文献(15)
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  • 收稿日期:  2016-07-20
  • 发布日期:  2017-10-24

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