冲击碾压荷载下砂土位移特征试验研究

陈忠清; 吕越; 徐超

doi:10.11779/CJGE2017S1048

冲击碾压荷载下砂土位移特征试验研究 English Version

陈忠清^1,2,
吕越^1,2,
徐超³

1. 绍兴文理学院土木工程学院,浙江绍兴 312000;
2. 绍兴文理学院岩石力学与地质灾害实验中心,浙江绍兴 312000;
3. 同济大学岩土及地下工程教育部重点实验室,上海 200092

基金项目: 绍兴文理学院科研启动项目（20155010）; 绍兴市公益技术; 应用研究计划项目（2015B70034）; 浙江省公益技术应用研究计划项; 目（2016C33052）

详细信息

作者简介:
陈忠清(1984-),男,浙江永康人,博士,讲师,主要从事地基处理等方面的教学和科研工作。E-mail:Q_CHEN_YK@163.com。

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出版历程
- 收稿日期: 2016-12-01
- 发布日期: 2017-11-19

Experimental tests on displacement characteristics of sand subjected to impact roller compaction

1. School of Civil Engineering, Shaoxing University, Shaoxing 312000, China;
2.Centre of Rock Mechanics and Geological Disaster,Shaoxing University, Shaoxing 312000, China;
3. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China

摘要

摘要: 冲击碾压技术是一种高效、经济的新型动态压实技术,已广泛应用于公路、机场等工程的路基压实、软基处理等领域。采用自行研制的冲击碾压模拟设备进行了模拟试验,主要研究了冲击碾压荷载下砂土位移分布总体特征以及冲击区域中心两侧砂土位移分布特征与冲击区域砂土位移随冲击作用时间的变化特征。结果表明：①冲击区域内砂土位移分布呈近似半椭圆形,其砂土位移沿深度方向的分布范围是碾压区域砂土位移分布范围的2.5倍左右;②冲击轮滚动冲击作用产生的砂土位移沿冲击作用中心两侧非对称分布;③随着冲击作用时间增加,砂土竖向位移明显增大,并在冲击区域左侧砂土浅部出现最大位移。
- 地基处理 /
- 冲击碾压 /
- 模拟试验 /
- 位移 /
- 砂土
Abstract: The impact roller (IR) compaction method is an efficient and cost-effective compaction technique, which has been widely used in highway and airport engineering for subgrade compaction and ground improvement of soft foundation. The simulation tests are carried out based on the self-developed impact roller simulation device. The general displacement distribution characteristics of sand as well as the displacement distribution characteristics of sand at both sides of impact center and displacement variation characteristics of sand with impact time are studied. The results show that: (1) The shape of displacement distribution of sand in the impacting area appears to be semi-elliptical, and the displacement distribution range of sand is 2.5 times the distribution range of sand in the rolling area; (2) The displacement distribution of sand subjected to IR compaction is not symmetrical around the impact center; (3) The vertical displacement of sand increases with the increasing impact time, and the maximum displacement of sand appears at the left side of the impacting area.
- ground improvement /
- impact roller compaction /
- simulation test /
- displacement /
- sand

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参考文献(12)

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