循环交通荷载下软土路基长期沉降理论解

doi:10.16285/j.rsm.2016.S1.056

›› 2016, Vol. 37 ›› Issue (S1): 435-440.doi: 10.16285/j.rsm.2016.S1.056

循环交通荷载下软土路基长期沉降理论解

吕玺琳^1，2，方航^1，2，张甲峰^1，2

1. 同济大学岩土及地下工程教育部重点实验室，上海 200092；2. 同济大学地下建筑与工程系，上海 200092

收稿日期:2015-03-17 出版日期:2016-06-16 发布日期:2018-06-09
作者简介:吕玺琳，男，1981年生，博士，副教授，主要从事岩土力学与工程方面研究工作。
基金资助:
国家重点基础研究发展计划青年科学家专题项目（No.2014CB049100）；国家自然科学基金（No.U1433123）。

A theoretical solution for long-term settlement of soft subgrade induced by traffic loading

LÜ Xi-lin^{1, 2}, FANG Hang^1 2, ZHANG Jia-feng^{1, 2}

1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China; 2. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China

Received:2015-03-17 Online:2016-06-16 Published:2018-06-09
Supported by:
This work was supported by the National Basic Research Program of China (2014CB049100) and the National Natural Science Foundation of China (U1433123).

摘要/Abstract

摘要： 基于循环交通荷载下软黏土累积塑性变形、累积孔压经验公式与分层总和法结合的方法，通过计算不排水循环累积塑性变形引起的沉降和不排水循环累积孔压消散引起的固结沉降叠加，建立了一个软土路基长期沉降拟静力计算模型。对交通荷载应力路径下的软黏土空心圆柱扭剪试验数据分析，获得了不排水累积塑性应变模型和不排水累积孔压公式的参数。基于弹性理论解积分计算交通荷载下路基中的动应力，再结合分层总和法计算了路基沉降与循环周次的关系。通过工程实例分析，对比了计算沉降结果与实测结果并与以往理论分析结果，验证了所建立模型的合理性。

关键词: 交通荷载, 长期沉降, 累积孔压, 累积塑性应变

Abstract: The accumulated plastic strain and the pore water pressure of the soft clay under traffic loading condition were given by empirical models. Based on the layer wise summation method, a pseudo-static method is proposed to calculate the long-term settlement of the soft subgrade. The settlement is obtained by the superposition of two deformations, the one is the deformation caused by the accumulative plastic strain of the soft soil induced by undrained cyclic loading; the other one is the deformation caused by the dissipation of the accumulative pore water pressure. According to the experimental data of the dynamic hollow cylinder tests, the parameters for the empirical model of the accumulative plastic strain and pore pressure are established. The stress distribution induced by the traffic loading in soft subgrade is obtained by the integration of the elastic analytical solution; and the calculation method of the total deformation is proposed by the layer-wise summation method. The proposed method has been used in real engineering projects; its rationality is verified by comparing the calculated settlement with the field measured result and the existing solution.

Key words: traffic loading, long- term settlement, accumulative pore pressure, accumulative plastic strain

中图分类号:

TU 433

吕玺琳，方航，张甲峰，. 循环交通荷载下软土路基长期沉降理论解[J]. , 2016, 37(S1): 435-440.

Lü Xi-lin, FANG Hang, ZHANG Jia-feng, . A theoretical solution for long-term settlement of soft subgrade induced by traffic loading [J]. , 2016, 37(S1): 435-440.

参考文献

相关文章 15

[1]	刘家顺, 王来贵, 张向东, 李学彬, 张建俊, 任昆, . 部分排水时饱和粉质黏土变围压循环三轴试验研究[J]. 岩土力学, 2019, 40(4): 1413-1419.
[2]	刘家顺，张向东，孙嘉宝，杨建军，方天健. 主应力轴旋转下K0固结饱和粉质黏土孔压及变形特性试验研究[J]. , 2018, 39(8): 2787-2794.
[3]	杨爱武，孔令伟，郭飞,. 天津滨海软黏土动力累积塑性变形特性与增长模型[J]. , 2017, 38(4): 979-984.
[4]	尹松，孔令伟，杨爱武，穆坤,. 花岗岩残积土填料路用工程特性室内试验研究[J]. , 2016, 37(S2): 287-293.
[5]	钱建固，林志果，马霄 , . 考虑孔压积累-消散耦合的等效有限元方法[J]. , 2015, 36(S1): 125-130.
[6]	高广运，李绍毅，涂美吉，张先林,. 地铁循环荷载作用下交叉隧道沉降分析[J]. , 2015, 36(S1): 486-490.
[7]	李男，黄博，凌道盛，汪清静 , . 斜椭圆应力路径下饱和松砂动力特性试验研究[J]. , 2015, 36(1): 156-162.
[8]	王娟，余海岁,. 道路安定理论的进展及其应用[J]. , 2014, 35(5): 1255-1262.
[9]	卢正，姚海林，胡梦玲，陈平,. 基于动变形控制法的路基临界高度与湿度关系研究[J]. , 2014, 35(1): 184-188.
[10]	魏新江，周洋，魏纲 . 土压平衡盾构掘进参数关系及其对地层位移影响的试验研究[J]. , 2013, 34(1): 73-79.
[11]	耿雪玉，于洁 . 交通荷载下横观各向同性土的Biot固结分析[J]. , 2012, 33(5): 1366-1374.
[12]	黄博，史海栋，凌道盛，陈云敏. 两种粉质黏土的动、静强度特性对比研究[J]. , 2012, 33(3): 665-673.
[13]	刘国彬，李青，吴宏伟 . 地下水开采引起的次压缩对隧道长期沉降的影响[J]. , 2012, 33(12): 3729-3735.
[14]	熊浩，高广运，王小岗. 层状地基中空沟对交通荷载的竖向隔振分析[J]. , 2011, 32(4): 1131-1137.
[15]	魏星，王刚，余志灵. 交通荷载下软土地基长期沉降的有限元法[J]. , 2010, 31(6): 2011-2015.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed

循环交通荷载下软土路基长期沉降理论解

A theoretical solution for long-term settlement of soft subgrade induced by traffic loading

PDF (Chinese)

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

Metrics

本文评价

推荐阅读 0