| 利用瞬态剖面法测定宽级配砾石土水力参数试验研究 | |
| Alternative Title | Laboratory Investigation of Hydraulic Parameter of Wide-Grading Gravelly Soil by Using Instantaneous Profile Method |
胡凯1,2 ; 陈晓清1
| |
| 2019 | |
| Source Publication | 水土保持研究
 |
| ISSN | 1005-3409 |
| Volume | 26Issue:4Pages:343-348 |
| Subtype | Article |
| Contribution Rank | 1 |
| Abstract | 土水特征曲线和渗透函数是土体渗流分析和稳定性研究的重要参数。基于瞬态剖面法原理,加工制作30 cm*30cm*30cm(长*宽*高)正方体和30cm*60cm(直径*高)的渗透柱,针对宽级配砾石土进行时域反射法标定试验和渗透柱试验。此渗透柱装置可以同时测定不同断面基质吸力和体积含水率变化,试验经进水饱和与排水蒸发阶段,得到宽级配砾石土体积含水率与基质吸力的关系,并根据瞬态剖面法得到非饱和渗透系数随基质吸力的变化关系;同时,采用van Genuchten和Brooks-Corey土水特征曲线模型和渗透系数函数对其进行分析。结果表明:该渗透柱适用于宽级配砾石土水力参数测定;van Genuchten和Brooks-Corey土水特征曲线模型都能很好地描述宽级配砾石土土水特征曲线;Brooks-Corey渗透系数函数在描述宽级配砾石土渗透系数与基质吸力关系要优于van Genuchten渗透系数函数。这种试验方法为宽级配砾石土水力参数的测定提供了参考。 |
| Other Abstract | The soil-water characteristic curve and permeability function are important parameters for soil seepage and stability analysis.In order to investigate the hydraulic parameters of wide-grading gravelly soil, a 30 cm*30 cm*30 cm (length*width*height)cube and 30 cm*60 cm (diameter*height)infiltration column was fabricated for the calibration test and infiltration column test of wide-grading gravelly soil.The infiltration column apparatus allows the measurement of both volumetric water content and matric suction at various levels.The infiltration column test was divided into three stages:saturation,drainage,and evaporation. And consequently,the relationship between volumetric water content and matric suction of wide-grading gravelly soil was obtained.Meanwhile,the instantaneous profile method was generally applied to determine the relationship between unsaturated permeability and matric suction.Moreover,the van Genuchten and Brooks-Corey equations and permeability functions were used to fit the test results.The infiltration column apparatus had been proved to be suitable for the determination of soil-water characteristics curves of wide-grading gravelly soil.The van Genuchten and Brooks-Corey model can accurately describe the soil-water characteristics curves.The Brooks-Corey permeability coefficient function was superior to the van Genuchten permeability coefficient function in terms of describing the relationship between the permeability coefficient and matric suction of wide-grading gravelly soil.This research will provide the method for measuring hydraulic parameters of wide-grading gravelly soil. |
| Keyword | 宽级配砾石土 时域反射法 瞬态剖面法 土水特征曲线 渗透系数函数 |
| DOI | 10.13869/j.cnki.rswc.2019.04.051 |
| Indexed By | CSCD |
| Language | 中文 |
| CSCD ID | CSCD:6583285 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imde.ac.cn/handle/131551/32304 |
| Collection | 山地灾害与地表过程重点实验室 |
| Corresponding Author | 陈晓清 |
| Affiliation | 1.中国科学院水利部成都山地灾害与环境研究所/山地灾害与地表过程重点实验室; 2.中国科学院大学 |
| First Author Affilication | 中国科学院水利部成都山地灾害与环境研究所 |
| Corresponding Author Affilication | 中国科学院水利部成都山地灾害与环境研究所 |
| Recommended Citation GB/T 7714 | 胡凯,陈晓清. 利用瞬态剖面法测定宽级配砾石土水力参数试验研究[J]. 水土保持研究,2019,26(4):343-348. |
| APA | 胡凯,&陈晓清.(2019).利用瞬态剖面法测定宽级配砾石土水力参数试验研究.水土保持研究,26(4),343-348. |
| MLA | 胡凯,et al."利用瞬态剖面法测定宽级配砾石土水力参数试验研究".水土保持研究 26.4(2019):343-348. |
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| 利用瞬态剖面法测定宽级配砾石土水力参数试（942KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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