1.四川大学水利水电学院水力学与山区河流开发保护国家重点实验室;2.广西新发展交通集团有限公司
S157；TV441
四川省自然科学基金面上项目(No. 24NSFSC0260)；2020年度第三批广西交通运输行业重点科技项目(No. 22H1126)
- GE Haoqian 1
- CHEN Qun 1
- LI Lu 1
- ZHOU Cheng 1
- LUO Qi 2
State Key Laboratory of Hydraulics and Mountain River Engineering,College of Water Resource and Hydropower,Sichuan University
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[目的]针对粗粒石渣渗透性强、持水能力弱、边坡漏水严重的问题，探究添加不同浓度的改性亲水性聚氨酯树脂W-OH溶液对砾石石渣坡面渗漏的改良效果。[方法]以广西石漠化地区某公路石渣边坡为研究对象，在边坡现场采用不同的冲刷流量对添加不同浓度W-OH溶液的石渣坡面开展不同径流流量的人工冲刷试验。[结果]研究得出未处理边坡的渗漏严重，当来流量大于30 L/min时才会形成坡面径流。且来流量为30 L/min时径流率仅占来流量的18.3%，81.7%的水都从坡体渗漏流失。经W-OH溶液处理后坡面的稳定径流率和稳定入渗率均随来流量和W-OH溶液浓度的增大而增大。用3%至6%浓度的W-OH溶液处理后坡面的稳定径流率较未处理坡面提高200%至385.5%，且W-OH溶液的浓度越高，对坡面的处理效果越好。入渗径流比随来流量和W-OH溶液浓度的增大而减小。[结论]用W-OH溶液处理后有效减少了粗粒石渣边坡的渗漏量，有助于提升坡体的保水能力，为边坡植被修复奠定基础。
[Objective] In order to solve the problems of strong permeability, weak water retention capacity of the coarse-grained slag, and serious leakage of the slope surface of the coarse-grained slag, the improvement effect of reducing leakage using modified hydrophilic polyurethane resin binder (W-OH) solution with different concentrations on the slope of gravel slag was investigated. [Method] Focused on a highway slag slope in the rocky desertification area of Guangxi Zhuang Autonomous Region, artificial erosion experiments were conducted on the gravel slope surface added W-OH solution with different concentrations using different erosion flow rates at the slope site. [Results] The study found that untreated slope experienced severe leakage, for which the runoff on the slope only appeared when the scouring discharge was greater than 30 L/min. When the scouring discharge was 30 L/min, the runoff rate accounts for just 18.3% of the incoming flow rate, and 81.7% of water was lost due to slope leakage. However, The average runoff rate and average infiltration rate of the slope after treatment with W-OH solution increase with the increase in the inflow rate and W-OH solution concentration. The stable runoff rate of the slope treated with W-OH solution with a concentration of 3% to 6% increases by 200% to 385.5% compared to that of untreated slopes, and the higher the concentration of W-OH solution, the better the treatment effect on the slope. The infiltration runoff ratio decreases with the increase in inflow rate and W-OH solution concentration. [Conclusion] After treatment with W-OH solution, the leakage of coarse-grained slag-slopes was effectively reduced, so that the water retention capacity of the slope was improved and it was contributed to slope vegetation restoration.
