| 大口径蒸渗仪原状土柱取样实用技术 |
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| 引用本文： | 胡永胜,王振龙.大口径蒸渗仪原状土柱取样实用技术[J].水文,2018,38(5):63-66. |
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| 作者姓名： | 胡永胜 王振龙 |
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| 作者单位： | 安徽省.水利部淮河水利委员会水利科学研究院水利水资源安徽省重点实验室 |
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| 摘 要： | 原状土蒸渗仪由于土体结构没有被扰动,可以保持其自然属性,是开展田间水文模拟的理想设施,但土体取样精度不易控制。结合五道沟水文实验站大口径蒸渗仪原状土柱取样实践,针对蒸渗仪原状土柱取样如何快速精确修整、罐体内壁和柱体间的空隙尺寸如何把控、土柱切割如何控制尽可能不被扰动等,系统提出其取样工艺流程和关键技术,发明了铣刀精修土柱法和切土刀板快速切土法,避免了人工修土带来的柱体表面不均匀不光滑、土柱切割不整齐等问题,尽可能减少原状土体结构的扰动和罐体内壁与土柱之间的边界效应。实验表明,罐体内壁与土柱间的空隙2mm可以保持蒸渗仪运行后原状土体的自然属性,从而提高蒸渗仪实验模拟的真实性。
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| 关 键 词： | 蒸渗仪 原状土 铣刀 切土刀板 大口径 |
| 收稿时间： | 2018/4/16 0:00:00 |
Technique of Sampling Natural Soil Column for Large-diameter Lysimeters |
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| HU Yongsheng,WANG Zhenlong.Technique of Sampling Natural Soil Column for Large-diameter Lysimeters[J].Hydrology,2018,38(5):63-66. |
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| Authors: | HU Yongsheng WANG Zhenlong |
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| Institution: | Key Laboratory of Water Resources of Anhui Province,Water Resources Research Institute of Huaihe RiverWater Conservancy Commission, Bengbu 230000, China |
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| Abstract: | This paper aims at studying a key technique for how to fix the inner wall that can rapidly and accurately control inter-column void sizeand avoid being disturbed by cutting the soil column during the process of sampling natural soil column using large-diameter lysimeters.And itsystematically proposed the sampling process combined with the practice of sampling natural soil at the Wudaogou hydrological experimentalstation.Besides, it invented the method of the refined soil column of milling cutter and the method of rapid soil cutting of soil cutting knife,whichavoid the problems of rough surface and irregular incision of the soil column brought by using traditional long knife to repair soil manually.Moreover, the methods can reduce the disturbance of the natural soil structure and the boundary effects as much as possible.The experiment hasshown that when the gap between the inner wall of tank and the soil column is 2mm, the natural properties of natural soil can be maintained afterthe operation of lysimeter.Thus,the reality of the lysimeter simulation experiment has been improved. |
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| Keywords: | lysimeter natural soil milling cutter cutter blade large diameter |
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