双联动软岩渗流–应力耦合流变仪的研制

DEVELOPMENT OF A DOUBLE LINKAGE TRIAXIAL TESTING MACHINE FOR HYDRO-MECHANICAL COUPLING IN SOFT ROCK

为研究软岩的长期力学特性,研制双联动软岩渗流–应力耦合三轴流变仪。该仪器特别适用于软岩、硬土在不同应力条件下的流变特性。仪器采用先进的伺服控制、滚珠丝杠和液压等技术组合,能自动稳压、自动记录应力–位移曲线、温度历时曲线。设备除了能够实现普通三轴试验机的功能,由于其独特的设计形式,还可以同时对2个试样实现相同轴压、不同围压、相同水压的力学试验;可以进行围压控制、孔隙水压力控制,同时可以测量孔隙水压力等等。使用情况表明,该试验装置结构简单,稳定性好,精度高,是一套功能齐全、使用方便的试验装置。

In order to study the long term mechanical properties, the double-linkage triaxial testing machine for hydro-mechanical coupling in soft rock is developed. This machine is particularly applicable to study the theological characteristics of soft rock and hard soil under various stress conditions. Using the technology of servo-controlled, ball screw and hydraulic pressure, this machine can automatically stabilize voltage and record stress-strain variation curve and temperature duration curve. In addition to the function of ordinary triaxial device, because of the unique design form of this machine, it not only can implement the mechanical tests simultaneously of two samples with same axial pressure, different confining pressures and same water pressure but also execute confining pressure control, pore water pressure control and its survey, etc.. The service condition shows that it is a convenient machine with complete functions, simple structure, good stability and high precision.