稻壳灰改良强风化泥岩边坡渗流特性

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中图分类号：TU43 文献标志码：A 文章编号：1008-0562（2026）02-0196-09

Abstract：To achieve green regulation of slope seepage and promote the resource utilization of agricultural solid waste，this study employs rice husk ash （RHA） to amend typical highly weathered expansive mudstone.The water retention and seepage characteristics of the mudstone under diffrent RHA contents were investigated through one-dimensional vertical infiltration tests and soil-water characteristic curve （SWCC） measurements.The results indicate thatRHA effectivelyfils soil pores and improves particle gradation，significantly increasing the air-entry value and residual volumetric water content， reducing the desaturation rate.RHA decelerates the weting front advance rate，shortens the wetting front migration distance，decreases the permeability coefficient，and enhances the overallwater retention capacity of the soil.The optimal improvement effect is observed at 6% of RHAcontent.By incorporating the soil-water interaction coefficient β ，plasticity index Ip ，andRHA content q into the traditional Green-Ampt （GA）model，the improvedGAmodelbetter reflects theactual infltrationbehaviorof RHA-amended soil.These findings provide a reference for the application of agricultural solid waste in the green protection of expansive mudstone slopes.

Keywords： rice husk ash; highly weathered mudstone; wetting front advance method; seepage; green slopes

0 引言

边坡滑坡灾害是较常见的地质灾害[1-2]。（剩余13237字）