水溶性聚氨酯改良砒砂岩的水理性能试验研究  

Water-physical Properties of Feldspathic Sandstone Modified by Hydraulic Polyurethane

作　　者：张俊魁 高海鹰[1] 梁止水[1,2] 

机构地区：[1]东南大学土木工程学院,江苏南京210096 [2]江苏杰成凯新材料科技有限公司,江苏南京210019

出　　处：《水土保持通报》2018年第1期103-106,共4页Bulletin of Soil and Water Conservation

基　　金：国家十二五科技支撑计划项目"砒砂岩固结促生技术研发"(2013BAC05B02);砒砂岩侵蚀岩性机理研究(2013BAC05B01)

摘　　要：[目的]研究水溶性聚氨酯(W-OH)对砒砂岩水理性能的影响,为砒砂岩高边坡防护提供指导。[方法]通过W-OH改良砒砂岩水稳定性和抗冲刷性的室内试验,初步分析其改良砒砂岩机理。[结果]W-OH在低浓度下即可明显提高砒砂岩团聚体的水稳定性和抗蚀能力,且团聚体水稳定性K值随团聚体粒径的减小而增大;W-OH喷洒在砒砂岩表面后,明显降低了坡面的产沙速率和产沙量。[结论]通过胶结沙粒,W-OH在砒砂岩表面形成固结层,减少了水土流失,对砒砂岩的坡面稳定起到了明显防护效果。[Objective] To explore the effect of water-physical properties of feldspathic sandstone modified by a kind of hydraulic polyurethane （W-OH）, and to provide the theoretical guidances for high slope protection of feldspathic sandstone.[Methods] By tasting indices such as the water stability and erosion resistance of the feldspathic sandstone modified by the W-OH, the modified mechanism was analyzed.[Results] It was indicated that the water stability and erosion resistance of the aggregates in modified feldspathic sandstone were obviously improved with the decrease of the particle size of the aggregates, the K was increase. The addition of W-OH significantly reduced the sediment yield and sediment yield on the slope.[Conclusion] Soil and water loss from the slopes decreased greatly and the slope stability was enhanced by cementing sands which a solidified layer on the surface of the feldspathic sandstone was formed.

关 键 词：水溶性聚氨酯(W—OH) 砒砂岩 水理性质 水土流失 

分 类 号：S157.9[农业科学—土壤学]