CAJ | 학술논문

影响天然硫酸盐渍土强度的因素众多，规律难以探索，为确定含盐量对硫酸盐渍土抗剪强度的影响，通过直剪试验研究了不同含盐量的硫酸盐渍土抗剪强度特性，研究表明：在直剪应力状态下，剪应力–剪切位移关系曲线有应变硬化(加工硬化)和应变软化(加工软化)两种形态，取决于含盐量、含水量、法向应力等因素。抗剪强度包线近似为折线型，与传统结构性土体包线形态一致，表明了硫酸盐渍土在直剪应力状态下仍然属于结构性土体。易溶盐含量对抗剪强度影响较大，总的变化趋势是：随着含盐量的增加，相同法向应力作用下的硫酸盐渍土的抗剪强度有不同程度的先减小后增大再减小的特点。
영향천연류산염지토강도적인소음다，규률난이탐색，위학정함염량대류산염지토항전강도적영향，통과직전시험연구료불동함염량적류산염지토항전강도특성，연구표명：재직전응력상태하，전응력–전절위이관계곡선유응변경화(가공경화)화응변연화(가공연화)량충형태，취결우함염량、함수량、법향응력등인소。항전강도포선근사위절선형，여전통결구성토체포선형태일치，표명료류산염지토재직전응력상태하잉연속우결구성토체。역용염함량대항전강도영향교대，총적변화추세시：수착함염량적증가，상동법향응력작용하적류산염지토적항전강도유불동정도적선감소후증대재감소적특점。
Many factors affect the natural sulphate saline soil strength, hard to explore the laws, in order to determine the effect of salt content on the shear strength of sulphate saline soil, through the direct shear test of soil salt content of saline sulfate with different shear strength characteristics, research shows that:under the shear stress, shear relation curves between stress shear displacement with strain hardening (hardening (softening) and strain softening processing) two forms, depending on the salt content, water content, normal stress and other factors. The shear strength envelope approximation for the broken line, and the traditional structured clay envelope shape, that of sulphate salty soil under shear stress condition still belongs to structural soil. The soluble salt content on shear strength greatly, the trend of the change is:with the increase of salt content, the same normal stress under the action of the sulphate saline soil shear strength characteristics of different degree decreases ifrst and then increases and then decreases.