W-OH材料对砒砂岩坡面土壤剥蚀率和微结构的影响  

Effect of W-OH Material on the Denudation Rate and Microstructure of Pisha Sandstone Slope

作　　者：梁止水[1,2] 刘豪伟 张立欣 郭策 赵艳兵 吴智仁 高海鹰 LIANG Zhishui;LIU Haowei;ZHANG Lixin;GUO Ce;ZHAO Yanbing;WU Zhiren;GAO Haiying(School of Civil Engineering,Southeast University,Nanjing 210096;Soil and Water Conservation Department,Yangtze River Scientific Research Institute,Wuhan 430010;Inner Mongolia Kubuqi Desert Technology Research Institute,Ordos,Inner Mongolia Autonomous Region 017400;School of the Environment and Safety Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013)

机构地区：[1]东南大学土木工程学院,南京210096 [2]长江科学院水土保持研究所,武汉430010 [3]内蒙古库布其沙漠技术研究院,内蒙古鄂尔多斯017400 [4]江苏大学环境与安全工程学院,江苏镇江212013

出　　处：《水土保持学报》2020年第5期355-360,共6页Journal of Soil and Water Conservation

基　　金：江苏省自然科学基金青年项目(BK20190348);国家重点研发计划项目(2017YFC0504505)。

摘　　要：砒砂岩区是我国水土流失问题最严重的区域之一。为研究砒砂岩坡面土壤剥蚀率的影响因素及W-OH材料对其的改良效果,以内蒙古自治区准格尔旗地区砒砂岩为研究对象,采用模拟冲刷试验方法研究了冲刷流量(2,3,4 L/min)、坡度(5°,7.5°,10°)以及W-OH喷洒浓度(1%,2%,3%)对砒砂岩坡面土壤剥蚀率和微结构的影响。结果表明:(1)砒砂岩坡面剥蚀率沿坡面方向逐渐减小,且随着冲刷流量和坡度的增大而增大;(2)在流量、坡度固定条件下,随着W-OH溶液浓度的提高,砒砂岩坡面土壤剥蚀率改善效果越明显,坡面的抗蚀性能提升越高,当浓度超过2%时,对坡面固结效果较为明显;(3)SEM试验结果说明W-OH溶液可以对砒砂岩颗粒进行有效地包裹,从而防止水分侵蚀,提高坡面抗蚀性,这与溶液浓度和喷洒量关系密切,也与坡度和冲刷流量有一定相关性。研究结果将对W-OH用于砒砂岩坡面治理提供一定的理论支撑。Pisha sandstone area is one of the most serious soil erosion areas in China.In order to study the influencing factors of the soil denudation rate and the improving effect of W-OH material on the Pisha sandstone slope,the Pisha sandstone from Zhungeer banner of Inner Mongolia Autonomous Region was used and the effect of the erosion discharge(2,3 and 4 L/min),slope angle(5°,7.5°and 10°)and the W-OH spraying concentration(1%,2%and 3%)on the soil denudation rate and microstructure of Pisha sandstone slope surface were studied by the method of simulated scouring experiment.The results show that:(1)The denudation rate of Pisha sandstone slope decreases gradually along the slope direction(from the top to the bottom),and it increases with the increase of flow and slope angle;(2)When the slope angle and flow are fixed,the denudation rate is improved significantly with the increase of the spraying concentration of W-OH solution.When the concentration is more than 2%,the consolidation effect of slope is more obvious;(3)SEM results show that W-OH solution can effectively wrap the Pisha sandstone particles to protect them from erosion,and the soil anti-scouribility is increased.Additionally,it is closely related to the concentration of solution and the amount of spray,and also to the slope angle and the flow.The research results will provide some theoretical support for the application of W-OH material in Pisha sandstone area.

关 键 词：砒砂岩 剥蚀率 水溶性聚氨酯 模拟冲刷 土壤侵蚀 

分 类 号：S157.2[农业科学—土壤学]