关键词: 单轴压缩, 蠕变, 高水材料, 巷旁充填体

Abstract: Aiming to the creep characteristics of the high-water material for filling body beside roadway, we conducted several experiments by means of a self-developed large-size test system (1500 mm×600 mm×900 mm) and numerical simulation software FLAC3D. The characteristics of the deformation and the stress of the filling body sample changing over the time were analyzed during the creep process which could be divided into three stages, instant, stable and accelerating, i.e., the limit loading of the filling body increases with the reduction of water-concrete ratio for the high-water material. Due to the great deformation speed during the accelerating creep stage, the filling body should stay at the instant creep stage for long-term stability. Generally, we believe that the appropriate loading on the filling body is not less than 70%~80% of its strength.

Key words: uniaxial compression, creep, high-water material, filling body beside roadway