水溶性聚氨酯改良砒砂岩的水理性能试验研究
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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)


Water-physical Properties of Feldspathic Sandstone Modified by Hydraulic Polyurethane
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    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。

    Abstract:

    [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.

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张俊魁,高海鹰,梁止水.水溶性聚氨酯改良砒砂岩的水理性能试验研究[J].水土保持通报,2018,38(1):103-106

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  • 收稿日期:2017-03-13
  • 最后修改日期:2017-04-13
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  • 在线发布日期: 2018-03-08
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