W-OH材料砂土固结体抗水流冲击性能

doi:10.16843/j.sswc.2021.03.011

摘要
图/表
参考文献
相关文章 (15)

全文: HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要 W-OH是一种以水为固化剂的亲水性聚氨酯改性复合材料，可广泛用于荒漠化防治和水土保持，具有优异的抗风蚀和水蚀性能。为研究W-OH与砂土的固结体抗水流冲击效果，采用模拟水流冲击试验，研究在W-OH质量分数（3%、4%、5%、6%和7%）、坡度（0°、15°、30°、45°和60°）和水流冲击速度（4、5、6、7、8、9和10 m/s）条件下，W-OH固结体抗水流冲击的性能。结果表明：基于W-OH的砂土固结体有很好的抗水流冲击能力，坡度越大抗水流冲击能力越强，坡度为60°时的抗水流冲击时间是垂直冲击的11.3倍；W-OH质量分数越大抵抗水流冲击性越强，60°坡度下，7%质量分数W-OH土壤固结层的抗水流冲击破坏时间是3%垂直冲击的219倍；水流冲击时间设定为5 min，固结层冲击破坏时间随水流速度增加而减小，说明W-OH浓度对砂土固结体抗水流冲击效果的影响显著，且与固结层水流冲击破坏的临界水流流速呈正线性相关。同时水流速度对固结层的冲击影响较大，但坡度的影响较小。该结果将为W-OH材料在砂土侵蚀防治应用提供一定的理论基础。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	梁止水
	吴智仁
	张立欣
	高海鹰

关键词 ： W-OH, 固结材料, 水土保持, 水流冲击, 土壤侵蚀

Abstract：[Background] China is one of the countries facing the most serious soil erosion. Soil erosion is mainly caused by water erosion, which is mainly reflected in rain drop hitting and runoff erosion. The main control measures for this problem include forest and grass measures, engineering measures and farming measures. Recently, the measures of soil consolidation by materials have become a research trend because of their simple construction and remarkable soil consolidation effect, W-OH is a kind of hydrophilic polyurethane modified composite material, which is using water as curing agent. It can be applied for desertification control and water and soil conservation since it has excellent resistance to wind and rainfall erosion. The anti-scourability of the solidified consolidation layer has been studied in rainfall conditions but the flow impact performance is rarely reported now.[Methods] In order to study the effect of W-OH on the resisting flow impact performance of consolidated sandy soil, a simulated flow impact test was conducted under the conditions of W-OH concentration (3%, 4%, 5%, 6% and 7%), slope angle (0, 15°, 30°, 45° and 60°) and flow velocity (4, 5, 6, 7, 8, 9 and 10 m/s).[Results] The solidified sandy soil based on W-OH had good resistance to water and splash erosion. The ability of splash resistance became stronger with the increase of the slope angle. The range of the flow impact resistance time did not change much when the slope angle was <45°. The range of the flow impact resistance greatly increased when the slope angle was >45°. Thus, the resisting performance at the slope angle of 60° was about 11.3 times of that in the condition of vertical impact. Additionally, the splash resistance increased significantly when the concentration of W-OH increased. The destruction time in the condition of 7% W-OH was about 219 times than that in the condition of 3% W-OH and vertical impact when the slope was fixed in 60°. Fixing the flow impact time as 5 min, the destruction time of solidified layer decreased with the increase of flow velocity and there was a positively linear relationship with the critical flow velocity with different concentrations. Additionally, the impact of flow velocity on the solidified layer was significant, but the slope angle was less.[Conclusions] The results indicate that W-OH concentration has a significant effect on the impact resistance of solidified layer and W-OH can be used to solidify soil. This will provide a theoretical basis for the application of W-OH in the prevention and control of soil erosion.

Key words： W-OH solidification material water and soil conservation flow impact soil erosion

收稿日期: 2020-02-13

PACS:

S157.2

基金资助:江苏省青年科学自然基金“干湿和冻融循环作用对W-OH材料固结砒砂岩的耐久性能影响机制研究”（BK20190348）；国家重点研发计划课题“砒砂岩区生态安全保障技术”（2017YFC0504505）；水利部水利技术示范项目“三峡库区坡耕地水土流失调控与资源高效利用技术集成与示范”（SF-201905）

作者简介: 梁止水(1988-),男,博士,助理研究员。主要研究方向:水土保持与生态修复。E-mail:zs_liang@seu.edu.cn

引用本文:

梁止水, 吴智仁, 张立欣, 高海鹰. W-OH材料砂土固结体抗水流冲击性能[J]. 中国水土保持科学, 2021, 19(3): 89-94.
LIANG Zhishui, WU Zhiren, ZHANG Lixin, GAO Haiying. Resisting water impact performance of solidified sandy soil by W-OH. SSWC, 2021, 19(3): 89-94.

链接本文:

http://journal12.magtechjournal.com/Jweb_stbc/CN/10.16843/j.sswc.2021.03.011 或 http://journal12.magtechjournal.com/Jweb_stbc/CN/Y2021/V19/I3/89

[1]	林祚顶,李智广.2018年度全国水土流失动态监测成果及其启示[J].中国水土保持,2019(12):1. LIN Zuoding,LI Zhiguang.The achievements of national soil and water loss dynamic monitoring in 2018 and its enlightenment[J].Soil and Water Conservation in China,2019(12):1.
[2]	晏清洪,原翠萍,雷廷武,等.降雨类型和水土保持对黄土区小流域水土流失的影响[J].农业机械学报,2014,45(2):169. YAN Qinghong,YUAN Cuiping,LEI Tingwu,et al.Effect ofrainstorm patterns and soil erosion control practices on soil and water loss in small watershed on Loess Plateau[J].Transactions of the CSAM,2014,45(2):169.
[3]	沈海鸥,郑粉莉,温磊磊,等.雨滴打击对黄土坡面细沟侵蚀特征的影响[J].农业机械学报,2015,46(8):104. SHEN Hai'o,ZHENG Fenli,WEN Leilei,et al.Effects of raindropimpact on rill erosion characteristics on loess hillslope[J].Transactions of the CSAM,2015,46(8):104.
[4]	李子君,周培祥,毛丽华.我国水土保持措施对水资源影响研究综述[J].地理科学进展,2006,25(4):49. LI Zijun,ZHOU Peixiang,MAO Lihua.General review on effects of soil and water conservation measures on water resources in China[J].Progress in Geography,2006,25(4):49.
[5]	LI Dongsheng,FAN Shaohui,HE Aijun,et al.Forest resources and environment in China[J].Journal of Forest Research,2004,9(4):307.
[6]	王晶,赵文武,刘月,等.植物功能性状对土壤保持的影响研究述评[J].生态学报,2018,39(9):3355. WANG Jing,ZHAO Wenwu,LIU Yue,et al.Effects of plant functional traits on soil conservation:A review[J].Acta Ecological Sinica,2018,39(9):3355.
[7]	王银梅,杨重存,谌文武,等.新型高分子材料SH加固黄土强度及机理探讨[J].岩石力学与工程学报,2005,24(14):2554. WANG Yinmei,YANG Chongcun,CHEN Wenwu,et al.Strength characteristics and mechanism of loess solidified with new polymer material SH[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(14):2554.
[8]	姚爱玲,延西利.ISS土壤稳定剂路用性能的试验研究[J].西安公路交通大学学报,1998,18(1):15. YAO Ailing,YAN Xili.Research for road performance of ISS soil stabilizer[J].Journal of Xi'an Highway University,1998,18(1):15.
[9]	张伟锋,刘清秉,蔡松桃.用HEC固化剂加固黄土的试验研究[J].人民长江,2009,40(3):56. ZHANG Weifang,LIU Qingbing,CAI Songtao.Testing study on loess consolidated by HEC soil stabilizer[J].Yangtze River,2009,40(3):56.
[10]	单志杰,张兴昌,赵伟霞,等.EN-1固化剂对土壤抗蚀性的影响[J].水土保持学报,2010,24(5):6. SHAN ZhiJie,ZHANG Xingchang,ZHAO Weixia,et al.Effects of EN-1 soil stabilizer on soil anti-erodibility[J].Journal of Soil and Water Conservation,2010,24(5):6.
[11]	苏涛.砒砂岩地区EN-1固化剂固化边坡抗冲稳定性的机理[D].西安:西北农林科技大学,2011:69. SU Tao.Mechanism of anti-scourability of slope solidified by EN-1 curing agent in Pisha sandstone area[D].Xi'an:Northwest A&F University,2011:69.
[12]	GAO Weimin,WU Zhiren,WU Zhishen.Study on resistance of wind/sand erosion based on a solidifying composite material of hydrophilic polyurethane[J].Journal of the Japan Society of Material Science,2011,60(9):850.
[13]	梁止水,杨才千,吴智仁.W-OH与砒砂岩固结体力学性能研究[J].人民黄河,2016,38(6):30. LIANG Zhishui,YANG Caiqian,WU Zhiren.Study on mechanical properties of Pisha sandstone solidified body with W-OH composite[J].Yellow River,2016,38(6):30.
[14]	梁止水,吴智仁.改性水溶性聚氨酯的固沙促生性能及其机理[J].农业工程学报,2016,32(22):171. LIANG Zhishui,WU Zhiren.Performances and mechanism of sand fixation and growth promotion based on modified hydrophilic polyurethane[J].Transactions of the CSAE,2016,32(22):171.
[15]	刘和平,符素华,王秀颖,等.坡度对降雨溅蚀影响的研究[J].土壤学报,2011,48(3):479. LIU Heping,FU Suhua,WANG Xiuying,et al.Effects of slope gradient on raindrop splash erosion[J].Acta Pedologica Sinica,2011,48(3):479.
[16]	张科利,细山田健三.坡面溅蚀发生过程及其与坡度关系的模拟研究[J].地理科学,1998,18(6):561. ZHANG Keli,HOSTAMADA K.Splash erosion process and its relation to slope gradient[J].Scientia Geographica Sinica,1998,18(6):561.
[17]	田方宝,林缅.水射流辅助破岩机理研究(2):水滴撞击[J].力学与实践,2007,29(2):34. TIAN Fangbao,LIN Mian.Studies on the mechanism of water Jet-Assisted drilling technology (2):High-speed drip impacting with solid target[J].Mechanics in Engineering,2007,29(2):34.
[18]	LIANG Zhishui,LIU Haowei,ZHAO Yanbing,et al.Effects of rainfall intensity,slope angle,and vegetation coverage on the erosion characteristics of Pisha sandstone slopes under simulated rainfall conditions[J].Environmental Science and Pollution Research,2020,27(15):17458.