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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。
In order to determine the deformation mechanism of the lightweight geosynthetic lightweight soil under the different particle size of EPS, the influence law of the deformation strength characteristics of the lightweight geosynthetic lightweight soil was studied through a three-axis consolidation undrained test system. The experimental results show that the stress-strain relationship of lightweight soil is nonlinear, multi-stage, strain softening and strain hardening. The shear strength failure envelope has two types of fold line and linear line, which depend on the self-structure strength and confining pressure The cohesion and internal friction angle decrease with the increase of EPS particle size.