| 摘要: |
| 【目的】以内蒙古准格尔旗典型的砒砂岩土壤为研究对象，研究容重变化对砒砂岩土壤入渗特性的影响及适用模型。【方法】采用室内模拟土柱法，对三组砒砂岩土壤RS（紫红色）、HS（粉红色）和WS（灰白色）分别进行水平土柱积水入渗试验，研究容重为1.30、1.35、1.40、1.45、1.50g/cm3这5个梯度对水分入渗规律的影响。【结果】砒砂岩土壤垂直入渗中，入渗率、湿润锋运移速率与时间呈幂函数递减关系。【结论】容重的大小影响砒砂岩土壤入渗能力，容重越大，入渗率、累计入渗量越低，湿润锋运移越慢；Philip模型及kostiakov模型均适用于模拟不同容重影响下的垂直入渗过程，其中kostiakov模型拟合精度更高；建立能够直接反映容重与入渗率关系的Philip改进模型，并通过r检验法验证了改进模型具有较高模拟 |
| 关键词: 入渗；砒砂岩土壤；容重 |
| DOI： |
| 分类号:S157 |
| 基金项目: |
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| Study on horizontal infiltration law and model test of pish sandstone soil |
|
wangjiakun
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内蒙古农业大学
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| Abstract: |
| 【Objective】Taking the typical arsenic sandstone soil in Zhungeer banner of Inner Mongolia as the research object, the influence of the change of bulk density on the infiltration characteristics of arsenic sandstone soil and the applicable model were studied.【Method】 In this paper, RS (purplish red), HS (pink) and WS (gray white) of three groups of soft rock soil were tested by simulated soil column method. The influence of 5 gradients (volume weight 1.30, 1.35, 1.40, 1.45 and 1.50g/cm3) on water infiltration was studied. 【Result】In the vertical infiltration of pisha sandstone soil, the infiltration rate and the migration rate of wetting front decrease with the time in a power function; the volume weight affects the infiltration capacity of soft rock soil, the larger the volume weight is, the lower the infiltration rate and cumulative infiltration amount are, and the slower the migration of wetting front is.【Conclusion】Philip model and Kostiakov model are suitable for simulating the vertical infiltration process under the influence of different volume weight, in which Kostiakov model is fitted The improved Philip model, which can directly reflect the relationship between bulk density and infiltration rate, is established, and the improved model is verified to have higher simulation accuracy by r-test. |
| Key words: infiltration； pisha sandstone soil； bulk density |
