不同EPS粒径下轻量土变形强度特性三轴试验研究  

Tri-axial Test for Deformation and Strength Characteristics of Lightweight Soil with Different EPS Grain Sizes

作　　者：谢书萌[1] 徐光黎[1] 叶三霞[2] 胡焕忠[1] 

机构地区：[1]中国地质大学岩土钻掘与防护教育部工程研究中心,湖北武汉430074 [2]中国水电顾问集团成都勘测设计研究院,四川成都610072

出　　处：《水电能源科学》2013年第2期138-141,共4页Water Resources and Power

基　　金：国家自然科学基金资助项目(41072218)

摘　　要：为确定新型土工合成材料轻量土在不同发泡颗粒(EPS)粒径下的变形机理,通过三轴固结不排水试验系统研究其变形强度特性的影响规律。试验结果表明,轻量土应力-应变关系具有非线性、多阶段性、应变软化和应变硬化特性;抗剪强度破坏包络线有折线型与直线型两种,取决于自身结构强度与围压;粘聚力与内摩擦角均随EPS粒径的增大而递减。To certify novel compound lightweight soil material,tri-axial consolidation tests are carried out to investigate the influence law of the deformation and strength characters.The results show that its stress-strain relation curves have characteristics of nonlinearity,multi-stage,strain hardening and strain softening;the shear strength failure envelope curves have broken line and straight line,which is determined by its structure strength and the consolidation pressure;cohesive strength and internal frictional angle decrease with the increase of EPS grain sizes.

关 键 词：轻量土 发泡聚苯乙烯 粒径 三轴试验 变形 强度 

分 类 号：TU411.3[建筑科学—岩土工程]