| 土层回弹变形特性及回弹潜力试验研究 |
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| 引用本文： | 吴静红,程刚,施斌,顾凯,蒋娜.土层回弹变形特性及回弹潜力试验研究[J].高校地质学报,2019,25(4):495. |
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| 作者姓名： | 吴静红 程刚 施斌 顾凯 蒋娜 |
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| 作者单位： | 苏州科技大学土木工程学院,苏州,215011;华北科技学院计算机学院,北京101601;南京大学地球科学与工程学院,南京210023;南京大学地球科学与工程学院,南京,210023 |
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| 基金项目： | 江苏省自然科学基金;国家自然科学基金;国家自然科学基金;国家重点研发计划;江苏省建设系统科技项目 |
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| 摘 要： | 对土层的回弹变形效应进行研究有助于科学实施地下水回灌、管理地下水资源及预测地面沉降。文章通过大量室内
压缩回弹试验，研究了土层回弹影响因素及回弹变形特性。试验结果表明：土层的最终回弹量受土样性质、最大固结压
力、固结时间以及卸荷比等因素影响；相同固结回弹条件下，土层黏粒含量越高，回弹量越大；对于同一种土，固结时间
越短，卸荷压力越大，回弹量越大；当卸荷比小于0.5时，固结压力对土层回弹量影响不明显，随着卸荷比的增大，同一种
土样所受固结压力越大，土样回弹率也越大，而当卸荷比大于0.9时，回弹率迅速增大。当土层类型及固结压力确定时，土
层最大回弹率和固结压力大致呈线性关系，可用于土层最大回弹率的预测。
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| 关 键 词： | 回弹变形 固结时间 固结压力 卸荷比 回弹率 |
Experimental Study on Rebound Deformation Characteristics and Rebound Potential of Soil Layer |
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| WUJinghong,CHENGGang,SHI Bin,GUKai,JIANG Na.Experimental Study on Rebound Deformation Characteristics and Rebound Potential of Soil Layer[J].Geological Journal of China Universities,2019,25(4):495. |
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| Authors: | WUJinghong CHENGGang SHI Bin GUKai JIANG Na |
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| Abstract: | The study of the rebound deformation effect of soil layer is helpful for the scientific implementation of groundwater recharge,
management of groundwater resources and prediction of land subsidence. In this paper, the influencing factors and deformation
characteristics of soil layer rebound are studied through a large number of indoor compression rebound tests. The experimental results
show that the ultimate rebound of soil layer is affected by soil properties, maximum consolidation pressure, consolidation time and
unloading ratio, etc. The higher the content of clay soil is, the greater the rebound is. For the same kind of soil, the shorter the
consolidation time and the greater the unloading pressure are, the greater the rebound is. When the unloading ratio is less than 0.5, the
consolidation pressure has no obvious influence on the soil layer rebound. With the increase of the unloading ratio, the soil rebound
increases and the influence of the consolidation pressure on the same soil becomes greater. And, when the unloading ratio is greater
than 0.9, the rebound increases rapidly. When the type of soil layer and consolidation pressure are determined, the maximum rebound
rate and consolidation pressure show a nearly linear relationship, which can be used to predict the maximum rebound rate of soil layers. |
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| Keywords: | rebound deformation consolidation time consolidation pressure unloading ratio rebound rate |
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