新型数控岩石节理剪切渗流试验台的设计与应用

岩石节理的应力渗流耦合性质对工程结构稳定性的影响普遍存在于各种岩体工程中，而进行岩石节理的室内剪切-渗流耦合试验，是一种有效的研究手段。采用新型数控岩体节理剪切渗流耦合试验台，应用全数字伺服控制系统，实现了对试验进程的平稳控制以及试验数据的多路同步实时采集和处理；通过剪切盒的精细设计，提高了剪切盒可承受的渗透压力值，并保证试验过程密封性能良好的同时实现了柔性边界条件。在恒定渗透压力作用下，分别进行了不同边界条件下的剪切渗流耦合试验，试验结果验证了该试验装置的可靠性和实用性，将能为岩体工程的合理设计提供有效数据依据。该试验台可以应用于地下核废料储存、水利水电地下洞室、水下隧道、采矿等工程有关问题的研究中。

Development and application of an improved numeric control shear-fluild coupled apparatus for rock joint

The hydraulic and mechanical properties of rock fractures are of considerable interest in several areas of rock engineering, such as radioactive waste, dam foundations, excavation of tunnels and caverns, geothermal energy plants, oil and gas production. Coupled shear-flow test is an effective measure researching the Hydro-Mechanical (HM) coupling character of rock joint. The experimental device was designed for a fracture to be subjected to normal loading and shear displacement by placing the fracture in a shear box. In order to retain a water seal between the lower and upper shear boxes and less friction resistance during shear, special rubber loop and silica sealant are installed between the lower and upper shear boxes. Through nice design, the shear box could keep favorably sealed under higher seepage pressure. In the meantime, a whole number-controlled computer control system has been developed to automatically accommodate the change in stress and displacement under CNL, CNV and CNS boundary conditions and also described to present performance of instrument control, data acquisition and storage operations of the novel apparatus. A series of tests using the artificially prepared joint specimens is conducted on the apparatus under different boundary conditions. The results of the conducted shear-fluid tests validate its reliability and practicability.