三峡大学学报（自然科学版）2026，Vol.48Issue(1)：17-23,7.DOI:10.13393/j.cnki.issn.1672-948X.2026.01.003
橡胶砂减压层对膨胀土挡墙土压力的调控作用研究
Study on the Regulation Effect of Rubber-Sand Mixture Cushion Layers on Earth Pressure of Expansive Soil Retaining Walls
摘要
Abstract
Installing a rubber-sand mixture cushion layer between expansive soil and a concrete retaining wall can effectively mitigate the increase in lateral earth pressure induced by the swelling of expansive soil upon wetting.However,the influence of such a cushion layer on the magnitude and distribution of earth pressure behind the wall has not been systematically investigated.In this study,model tests on expansive soil retaining walls with rubber-sand mixture cushion layers were conducted to examine the distribution of earth pressure along the wall height.Then a theoretical calculation method for lateral earth pressure was developed based on the horizontal differential element method.The results indicate that the rubber-sand mixture cushion layer undergoes lateral compression under the action of swelling pressure,providing deformation space for the expansive soil and thereby significantly reducing the earth pressure acting on the wall.When the backfill reaches full saturation,the lateral earth pressure gradually increases with depth.The theoretical predictions show good agreement with the experimental measurements,verifying the validity of the proposed calculation method.关键词
橡胶砂/减压层/膨胀土挡墙/土压力/模型试验Key words
sand-rubber mixtures/cushion layer/expansive soil retaining wall/lateral earth pressure/model test分类
建筑与水利引用本文复制引用
裴骏达,樊科伟,王洪祯,高嘉禾,卞长荣..橡胶砂减压层对膨胀土挡墙土压力的调控作用研究[J].三峡大学学报（自然科学版）,2026,48(1):17-23,7.基金项目
国家自然科学基金项目(52578397) （52578397）
中央高校基本科研业务费(B250201023) （B250201023）
江苏省青年科技人才托举工程(JSTJ-2025-235) （JSTJ-2025-235）
