| 引用本文: | 吕国顺,张豫川,赵野.非饱和压实黄土入渗速率规律研究[J].灌溉排水学报,,():-. |
| LV Guo-shun,ZHANG Yu-chuan,ZHAO Ye.非饱和压实黄土入渗速率规律研究[J].灌溉排水学报,,():-. |
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| 摘要: |
| 黄土入渗速率的发展规律是研究黄土入渗过程以及土体渗流特性变化的关键之一,为了得出压实黄土入渗过程速率变化规律,设计室内模型试验,以压实度作为变量,包括水平无水头渗透和垂直定水头渗透试验。监测渗流过程土体体积含水率和基质吸力变化情况,再计算得出渗透速率。试验研究发现压实黄土入渗速率与压实系数有关,随土体压实度增大逐渐减小；随渗透距离和深度逐渐衰减；随渗透时间逐渐衰减。对水平和垂直渗透速率与渗透时间和渗透距离进行拟合,结果显示均按照幂函数关系发展。 |
| 关键词: 非饱和;压实黄土;渗透速率;基质吸力;压实度。 |
| DOI： |
| 分类号:TU411 |
| 基金项目:1.兰州碧桂园三期工程大厚度填方体变形特性试验研究课题（071100090）；2.隐形曲界面黄土高填方沉降特性研究（054000006） |
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| Study on Infiltration Velocity of Unsaturated Compacted Loess |
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LV Guo-shun, ZHANG Yu-chuan, ZHAO Ye
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College of Civil Engineering and Mechanics,Lanzhou University
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| Abstract: |
| The development law of infiltration velocity of loess is one of the keys to grasp the infiltration process and seepage characteristics of loess. In order to obtain the variation law of infiltration velocity of compacted loess, the indoor model test was designed, with the compaction degree as the variable, including horizontal headless infiltration and vertical fixed head infiltration test. Monitoring the change of soil volume moisture content and matric suction during seepage process, and then calculating the infiltration velocity.It is found that the infiltration velocity of compacted loess is related to the compacting coefficient, which decreases with the increase of compacting degree;It gradually attenuates with the penetration distance and depth;It decays gradually with the penetration time. The horizontal and vertical penetration velocity were fitted with penetration time and penetration distance, the results show that all of them follow the power function. |
| Key words: Unsaturated; Compacted loess; Penetration velocity; Matric suction; Compaction coefficient. |
