不同服役环境下高速铁路膨胀土路堑基床振动特性模型试验

杨果林; 王亮亮; 杨啸

doi:10.11779/CJGE201501016

不同服役环境下高速铁路膨胀土路堑基床振动特性模型试验 English Version

杨果林¹,
王亮亮^{1, 2},
杨啸³

1. 中南大学土木工程学院,湖南长沙 410075; 2. 中国矿业大学力学与建筑工程学院,江苏徐州 221116; 3. 莫纳什大学土木工程系,莫纳什,澳大利亚

基金项目: 国家自然科学基金项目（51308095）; 中国电机工程学会电力青年科技创新项目（20110515）

详细信息

作者简介:
杨果林(1963- ),男,汉族,湖南桃江人,教授,博士生导师,从事道路与铁道工程、岩土工程和结构工程的教学和科研。E-mail: guoling@mail.csu.edu.cn。

中图分类号: TU443
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出版历程
- 收稿日期: 2014-06-02
- 发布日期: 2015-01-19

Model tests on vibration characteristics of cutting subgrade of expansive soil of express railways under different service environments

1. School of Civil Engineering, Central South University, Changsha 410075, China; 2. School of Mechanics and Civil Engineering, China University of Mining and Technology (CUMT), Xuzhou 221116, China; 3. Department of Civil Engineering, Monash University, Melbourne, Australia

摘要

摘要: 为研究铺设半刚性防水结构层的膨胀土路堑基床的振动特性,在实验室内进行1∶1大比例尺模型试验,对基床在干燥、降雨和地下水位上升3种服役环境下以4 Hz频率分别进行100×10⁴次激振,监测路堑基床不同位置的加速度和速度响应。结果表明：在相同循环动力荷载作用下,服役环境对新型基床结构的振动加速度和速度大小具有显著影响,但对二者沿基床深度方向的衰减规律影响不大;与干燥服役环境相比,路基面的加速度和速度增长幅度在降雨服役环境下分别为35%和20%,地下水位上升时分别为45%和23%。
- 膨胀土 /
- 模型试验 /
- 振动特性 /
- 基床 /
- 高速铁路
Abstract: In order to study the vibration characteristics of cutting subgrade by using semi-rigid water-proof structural layer, 1:1 large-scale model tests are carried out. The cyclic loads with frequency of 4 Hz and excitation of 100 thousand times are imposed on the subgrade model under three kinds of service environments (dry, raining and underground water rising). The results show that under the same cyclic loads, the influence of service environments on velocity and acceleration of cutting subgrade is significant, but they have not obvious influence on their attenuation law in the vertical direction. Compared to that under the dry working condition, the increasing range of velocity and acceleration on subgrade surface is respectively 35% and 20% under the raining service environment, and 45% and 23% under the underground water rising service environment.
- expensive soil /
- model test /
- vibration characteristic /
- subgrade bed /
- express railway

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参考文献(14)

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