CAJ | 학술논문

利用高级固结试验系统对不同配合比的砂泥岩混合料进行压缩固结试验，研究不同竖向压力下土体的压缩、回弹及再压缩过程中压缩与渗透的耦合变化特征。试验结果表明：土体的压缩系数随竖向压力的增大趋于稳定，随泥岩含量的增大而增大；压缩指数随泥岩含量的增大而增大，即泥岩含量越高，土体的压缩性越强；土体渗透系数随孔隙比的增大而加速增大，随泥岩含量的增大而减小；提出一维渗流压缩固结耦合有限差分计算方法，克服了太沙基固结理论中渗透系数恒定及小变形的假定。
이용고급고결시험계통대불동배합비적사니암혼합료진행압축고결시험，연구불동수향압력하토체적압축、회탄급재압축과정중압축여삼투적우합변화특정。시험결과표명：토체적압축계수수수향압력적증대추우은정，수니암함량적증대이증대；압축지수수니암함량적증대이증대，즉니암함량월고，토체적압축성월강；토체삼투계수수공극비적증대이가속증대，수니암함량적증대이감소；제출일유삼류압축고결우합유한차분계산방법，극복료태사기고결이론중삼투계수항정급소변형적가정。
We used the GDSCTS( GDS advanced consolidation testing system) for consolidating and permeating experiments on the mixed filling with different mix proportion. To do this, we proposed experiments for studying the coupling characteristics of the consolidating and the permeating in soils compression under instantaneous step loading. The results show that the compressibility tends to be stable with the increasing vertical pressure and goes up with the increasing mudstone content. The compression index also increases with the increasing mudstone content, which means that the more the mudstone content is, the higher the compressibility of soil would be. The permeability exponentially increases with the increasing of the void ratio and decreases with the increasing of mudstone content. Thus, we proposed an algorithm based on the finite difference method for 1-D seepage-consolidation coupling. The algorithm is more appropriate to describe the consolidation of soils than the Terzaghi's consolidation theory because the permeability is related to the void ration and the large deformation is permitted in the new method.