The Study On The Characters Of The Soft Rock Rheology And Its Engineering Applications

The rheologic model of soft rock has been discussed, the expansion and rheologic behavior for soft rock has been studied, based on the combination of experiment and numerical analysis. For soft rock, the author has probed into the expansive mechanism, established a creep model, derived the viscoelasticity solutions of displacement and stress in rockmass around tunnel, introduced the theory of hereditary creep, and obtained the solution of displacement and whose rate in case of varied stress.The principle and design of bolting and shotcrete lining is expounded in detail in this article. The above results widely reflected the degree on respecting the effect of creep in soft rock on the country rock of displacement. The wrecked circumstances in tunnel by mining pressure have been discussed. The displacement and stress and strain are stimulatingly computed according to whether the supporting is available or not. For preventing the damage of tunnel, many of technical manners have been proposed. The results of these measures have practical engineering meaning for the design and construction of soft rock tunnel.