| 摘要: |
| 石漠化地区虽然降雨丰富，但由于复杂的岩溶地质结构渗漏导致边坡缺土少水，从而制约了石漠化边坡的植被恢复，如何实现降雨集蓄利用成了目前绿色公路建设中石漠化边坡植被恢复的热点问题。结合广西贺巴高速来都段石漠化边坡应用梯级新型板槽进行植被恢复的工程需求，开展了植被板槽降雨集蓄利用的室内试验及现场工程模拟数值试验，利用数值分析软件对该石漠化边坡植被板槽降雨集蓄利用的概化模型，进行数值试验模拟观测和分析。室内试验和数值试验结果表明新型植被板槽技术可以模拟在不同降雨特征下植被板槽的降雨集蓄及持水能力，可以帮助揭示在多雨季和少雨季石漠化边坡板槽蓄水层的雨水集蓄及填土层含水率的空间分布特征，发现工程实施中可能出现的问题并提出对策。该研究成果可为在石漠化边坡现场应用植被板槽提供理论依据，促进石漠化地区绿色公路建设的蓬勃发展。 |
| 关键词: 石漠化边坡 边坡植被恢复 梯级新型植被板槽 降雨集蓄利用 工程模拟数值试验 |
| DOI： |
| 分类号:U 231.3 |
| 基金项目:国家自然科学基金联合基金重点支持项目(U22A20602，U2340227)；2020年度第三批广西交通运输行业重点科技项目(XFZ-KY-LYH-20200112) |
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| Laboratory test and engineering simulation of rainfall water storage and retention characteristics of vegetated slab trenches on rocky desertification slope |
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GAO Shan1, ZHOU Cheng2, ZHOU Ze-chang3, LUO Qi1, FAN Li-juan2, LIAO Yan-kai4
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1.Guangxi New Development Transportation Group Co,Ltd;2.College of Water Resource and Hydropower,Sichuan University;3.GuangxiSCommunicationsSDesignSGroup Co,Ltd;4.Sichuan Shudao Railway Investment Group Co,Ltd
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| Abstract: |
| The complex geological structure of rocky desertification slopes leads to serious loss of soil and water from slope surface and subsurface, which restricts the recovery of slope vegetation. How to realize the vegetation restoration storage of rainwater and soil on rocky desertification slopes is the focus of green road construction in rocky desertification areas. A new type of vegetated slab trenches is utilized on the rocky desertification slope in the Laidu section of the Guangxi Heba Expressway to realize rainfall collection and storage, soil collection and utilization and vegetation restoration. Accordingly, laboratory test is conducted and numerical analysis software is used to perform engineering numerical simulation on the conception model of slab trenches on rocky desertification slopes. Laboratory test and numerical test well shows the water storage and water holding characteristics of slab trench of rocky desertification slope in different rainfall seasons. The distribution of the volumetric water content is well studied in slab trench of rocky desertification slopes along the depth and width directions under different rainfall. Possible engineering problem is found and solution is proposed accordingly. The laboratory and numerical test results of this study can provide a theoretical basis for the engineering application of slab trenches in rocky desertification and promote the vigorous development of green road construction in rocky desertification areas. |
| Key words: rocky desertification slope vegetation restoration on slopes stepped vegetated slab trenches rainfall water storage and retention laboratory test and engineering simulation |
