冲击碾压荷载下砂土位移特征试验研究

发布时间：2018-04-27 04:02

本文选题：地基处理 + 冲击碾压　；参考：《岩土工程学报》2017年S1期

【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。
[Abstract]:Impact compaction is a new dynamic compaction technology with high efficiency and economy, which has been widely used in roadbed compaction and soft foundation treatment of highway, airport and other projects. The simulation test was carried out by using the self-developed impact roller compaction simulation equipment. The general characteristics of sand displacement distribution under impact roller compaction, the characteristics of sand displacement distribution on both sides of impact zone and the variation characteristics of sand soil displacement with impact time in impact region are studied in this paper. The results show that the displacement distribution of sand in the impact area is approximately semi-elliptical. The distribution range of sand displacement along depth direction is about 2.5 times that of sand soil displacement distribution range in roller compaction region.) the sand soil displacement caused by rolling impact of impact wheel increases along the asymmetric distribution of sand soil displacement along the two sides of impact center with the increase of impact time. The vertical displacement of sand increases obviously, and the maximum displacement occurs in the shallow part of the sand on the left side of the impact area.
【作者单位】：绍兴文理学院土木工程学院;绍兴文理学院岩石力学与地质灾害实验中心;同济大学岩土及地下工程教育部重点实验室;
【基金】：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)
【分类号】：TU441

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