CAJ | 학술논문

基于不同含水状态下浅变质板岩单轴蠕变特性的试验研究结果，考虑水对浅变质板岩蠕变参数的劣化效应，分析蠕变参数随饱和度的变化规律并建立数学关系式。研究表明：饱和度越大，瞬时弹性模量、黏性模量以及黏滞系数越小，其中瞬时弹性模量与饱和度线性负相关，而黏性模量和黏滞系数与饱和度呈负指数相关。将岩石受水影响的劣化效应定义为对各个蠕变参数的损伤，结合试验结果确立损伤变量和损伤演化方程，并基于浅变质板岩蠕变方程建立可考虑含水损伤劣化的岩石蠕变本构模型。利用 FLAC3D二次开发平台实现本构模型的程序化，通过数值模拟试验验证模型和程序的合理性，研究结果可为工区隧道施工期围岩流变特性的研究提供依据。
기우불동함수상태하천변질판암단축연변특성적시험연구결과，고필수대천변질판암연변삼수적열화효응，분석연변삼수수포화도적변화규률병건립수학관계식。연구표명：포화도월대，순시탄성모량、점성모량이급점체계수월소，기중순시탄성모량여포화도선성부상관，이점성모량화점체계수여포화도정부지수상관。장암석수수영향적열화효응정의위대각개연변삼수적손상，결합시험결과학립손상변량화손상연화방정，병기우천변질판암연변방정건립가고필함수손상열화적암석연변본구모형。이용 FLAC3D이차개발평태실현본구모형적정서화，통과수치모의시험험증모형화정서적합이성，연구결과가위공구수도시공기위암류변특성적연구제공의거。
The mathematical relationship between the creep parameters and the degree of saturation of the low-grade metamorphic slate was established based on the experimental data of uniaxial creep under different moisture states. It is found that the higher the degree of saturation of the rock,the smaller the creep parameters. The instantaneous elastic modulus varies linearly with the degree of saturation. The viscous modulus and the coefficient of viscosity vary exponentially with the degree of saturation. The damage of the rock induced by water is considered as the damage of each creep parameter. The variables defining damage and the variation of damaging are determined according to the experimental results. Then creep equation for the low-grade metamorphic slate considering water damage is established. The constitutive model is incorporated into the software FLAC3D. The results from the compressive creep test and the numerical calculation verify the rationality of the model.