首页|石漠化边坡及其植被板槽的地下渗漏一体化综合观测技术及应用模拟

石漠化边坡及其植被板槽的地下渗漏一体化综合观测技术及应用模拟

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  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
[目的]表土贫瘠的石漠化边坡的地表和地下水土流失严重，限制了该地区的植被恢复，其水土保持生态防护是目前绿色公路建设的热点问题。[方法]结合广西贺巴高速来都段石漠化边坡应用梯级植被板槽进行水土保持的工程需求，研发了石漠化边坡地下渗漏的一体化综合观测技术，并利用数值分析软件，分别对该石漠化边坡及其植被板槽水土流失一体化综合观测的概化模型，进行应用性的数值试验模拟观测和分析。[结果]数值试验结果表明:石漠化边坡在仅覆盖一层薄土层时，总地下渗漏量达到65%以上，随着岩溶裂隙率和裂隙倾角的增加，基岩裂隙渗漏量占比增加，表层岩溶带渗漏量占比减小;在石漠化边坡上设置集约化填土的植被板槽措施后，在不考虑板槽底的防渗漏材料时，总地下渗漏量占比变成40%左右，与仅覆盖一层薄土的石漠化边坡相比地下渗漏占比降低25%以上。石漠化边坡上植被板槽的蓄水效率随植被覆盖度的增加而增加;坡度的增加会造成裸露边坡的地下渗漏量增加，因此必须加强石漠化边坡集雨面功能的建设和坡面降雨径流收集。[结论]研究成果可为石漠化边坡植被板槽水土保持生态防护措施的现场研究和工程应用提供理论依据。
Integrated comprehensive observation technology and application simulation on underground leakage of rocky desertification slope and its vegetation plate slot
[Objective]The surface and underground soil erosion of rocky desertification slope with poor topsoil is serious,which limits the vegetation restoration in this area.The ecological protection of soil and water conservation is a hot issue in the construc-tion of green highway.[Methods]Combined with the engineering requirements of soil and water conservation in the rocky deserti-fication slope of Laidu section of Heba Expressway in Guangxi,the integrated comprehensive observation technology of under-ground leakage of rocky desertification slope is developed,and the generalized model of integrated comprehensive observation of soil and water loss of rocky desertification slope and its vegetation plate slot are simulated and analyzed by numerical experiment.[Results]The numerical test result showed that,when the rocky desertification slope was only covered with a thin layer of soil,the total underground leakage reached more than 65%,with the increase of karst fissure rate and fissure inclination,the percent-age of bedrock fissure leakage increased,and the percentage of leakage from the epikarst zone decreased;after the vegetated and earth-filled slab trenches were installed on the rocky desertification slope,and the anti-seepage material at the bottom of the slab trench was not included,the percentage of the total underground leakage became around 40%,and reduced by more than 25%in comparison with the rocky desertification slope which was only covered with a thin layer of soil.The water retention efficiency of vegetated slab trenches on rocky desertification slope increased with the increase of vegetation cover;the increase of slope gradi-ent would cause the increase of underground leakage on exposed slopes,thus it was necessary to strengthen the construction of slope rainfall runoff collection and rain catchment surface function on rocky desertification slopes.[Conclusion]The research result can provide theoretical basis for the field research and engineering application of ecological protection measures of soil and water conservation in rocky desertification slope.

slope engineeringvegetation plate slotintegrated comprehensive observationsoil and water conservationecologi-cal protectionnumerical simulationmodel test

罗凯、罗祺、周成、张劢捷、周泽昶、杨礼明、廖烟开

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广西新发展交通集团有限公司,广西 南宁 530029

四川大学 水利水电学院,四川 成都 610065

广西交通设计集团有限公司,广西 南宁 530011

四川蜀道铁路投资集团有限公司,四川 成都 610060

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边坡工程 植被板槽 一体化综合观测 水土保持 生态防护 数值模拟 模型试验

国家自然科学基金联合基金重点支持项目国家自然科学基金联合基金重点支持项目2020年度第三批广西交通运输行业重点科技项目

U22A20602U2340227XFZ-KY-LYH-20200112

2024

10.13928/j.cnki.wrahe.2024.06.008

水利水电技术(中英文)
水利部发展研究中心

水利水电技术(中英文)

CSTPCD北大核心
影响因子：0.456
ISSN：1000-0860
年,卷(期)：2024.55(6)
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