CAJ | 학술논문

为了研究层状软弱岩体流变参数的各向异性特征，以白龙江流域在建电站引水隧洞工程为背景，对层状软岩不同倾角作用下流变参数的各向异性特征进行试验研究，并采用最小二乘法对试验数据进行拟合，获得基于Burgers模型流变参数以及流变参数与岩石倾角的二元方程。结果表明：软岩倾角的不同直接影响其蠕变破坏模式及长期强度；试验获得的流变参数随着倾角由0°增至90°的顺序增加逐渐减小，且各参数变化趋势基本相同，呈锯齿状变化；试验得出的各流变参数与岩石倾角的二元方程可以在已知岩石倾角的条件下求出各流变参数，从而本构模型变为应力与应变的线性关系式，为施工中更好的了解软岩变形情况提供了一种计算方法。
위료연구층상연약암체류변삼수적각향이성특정，이백룡강류역재건전참인수수동공정위배경，대층상연암불동경각작용하류변삼수적각향이성특정진행시험연구，병채용최소이승법대시험수거진행의합，획득기우Burgers모형류변삼수이급류변삼수여암석경각적이원방정。결과표명：연암경각적불동직접영향기연변파배모식급장기강도；시험획득적류변삼수수착경각유0°증지90°적순서증가축점감소，차각삼수변화추세기본상동，정거치상변화；시험득출적각류변삼수여암석경각적이원방정가이재이지암석경각적조건하구출각류변삼수，종이본구모형변위응력여응변적선성관계식，위시공중경호적료해연암변형정황제공료일충계산방법。
In order to study the anisotropic characteristics of layered soft rock’ s rheological parameters ,the experiments with samples of the layered soft rocks positioned at different angles were conducted based on the hydropower station diver-sion tunnel project of Bailongjiang Valley .And then least square method was adopted to fit the experiment data ,through which the rheological parameters and the equation of the parameter and stratification plane oblique angle were obtained based on Burgers model .The results showed that:the angle of the stratification plane has an important influence on the different creep failure modes of the rock mass and the long-term strength;the rheological parameters obtained from the tests gradually decreases when the plane angle changes from 0° to 90° ,and each parameter presents the same serrated change curve;furthermore ,each rheological parameter can be determined from the equation of the rheological parameter and stratification plane angle when the value of the angle is known .Therefore the constitutive model is actually a linear relation model between the stress and strain .This study put forward a new calculation method which can better reveal the deformation state of layered soft rocks during the construction of engineering projects .