CAJ | 학술논문

对某心墙堆石坝掺砾心墙料进行三轴固结排水剪切试验，研究剪切速率对掺砾心墙料的应力-应变关系和强度特性影响。结果表明：无论剪切速率高低，掺砾心墙料试样在不同围压条件下应力-应变关系曲线均表现出不同程度的硬化和剪缩现象，随着剪切速率的增加，硬化现象逐步增强，剪缩现象逐渐减小；随着剪切速率的增加，偏应力峰值强度（σ1-σ3）f 降低越明显，且强度指标φ减小显著；在试验的剪切速率范围内，割线弹性模量E1随剪切速率的增加而减小，体积模量K1随剪切速率的增加呈先增加、后减小的趋势。
대모심장퇴석패참력심장료진행삼축고결배수전절시험，연구전절속솔대참력심장료적응력-응변관계화강도특성영향。결과표명：무론전절속솔고저，참력심장료시양재불동위압조건하응력-응변관계곡선균표현출불동정도적경화화전축현상，수착전절속솔적증가，경화현상축보증강，전축현상축점감소；수착전절속솔적증가，편응력봉치강도（σ1-σ3）f 강저월명현，차강도지표φ감소현저；재시험적전절속솔범위내，할선탄성모량E1수전절속솔적증가이감소，체적모량K1수전절속솔적증가정선증가、후감소적추세。
The stress-strain behavior and shear strength of gravelly soil at different shearing rates were investigated through a triaxial consolidated-drained shear test on the gravelly soil of a core rockfill dam .The results show that regardless of the level of the shearing rate , the stress-strain behaviors of the gravelly soil exhibited various degrees of hardening and shear shrinkage under different confining pressures .As the shearing rate increased , the hardening gradually strengthened but the shrinkage weakened .The peak deviatoric stress (σ1-σ3 ) f decreased remarkably with the increase of the shearing rate , and the intensity index φdecreased significantly .In the range of testing shearing rates, the secant modulus E1 decreased with the increase of the shearing rate , and the bulk modulus K1 increased initially , and then decreased with the increase of the shearing rate .