CAJ | 학술논문

通过大型动三轴试验研究堆积体在不同应力水平、不同循环荷载幅值下残余应变与振次的关系，同时进行不同初始条件下残余应变的对比。试验发现堆积体在循环荷载下的残余应变与 lg(1+N )有较好的线性关系(N ≤30)，沈珠江经验公式适用于堆积体在循环荷载下累积残余应变的计算。初始条件对堆积体的残余应变有重要影响，饱和不排水条件下残余剪应变最大，饱和排水条件次之，风干排气条件最小。应用沈珠江残余应变公式进行堆积体循环荷载下残余变形计算时应选取与工程实际条件相匹配的参数。
통과대형동삼축시험연구퇴적체재불동응력수평、불동순배하재폭치하잔여응변여진차적관계，동시진행불동초시조건하잔여응변적대비。시험발현퇴적체재순배하재하적잔여응변여 lg(1+N )유교호적선성관계(N ≤30)，침주강경험공식괄용우퇴적체재순배하재하루적잔여응변적계산。초시조건대퇴적체적잔여응변유중요영향，포화불배수조건하잔여전응변최대，포화배수조건차지，풍간배기조건최소。응용침주강잔여응변공식진행퇴적체순배하재하잔여변형계산시응선취여공정실제조건상필배적삼수。
Residual deformation behaviors of deposits under cyclic loading at different stress levels and cyclic loading amplitudes are studied by a large-scale dynamic triaxial test.The residual de-formation of the deposits under different initial conditions is also discussed.Residual strains under cyclic loading are found to show a linear relationship with lg(1 +N )when N is less than 30. Shen’s empirical equation is suitable for calculating the residual strain of deposits under cyclic loading.The initial conditions have a significant effect on the residual strain of deposits.Residual shear strain is the largest under undrained conditions,medium under drained conditions,and smal-lest under air dried drainage conditions.When the residual deformation of the deposit under cyclic loading is calculated using Shen ’s equation,the equation’s parameters should match the actual engineering conditions.