裂隙岩体的孔隙水压力对于库岸边坡岩体的强度和稳定性有着重要的影响.在许多边坡工程当中都会遇到循环孔隙水压力的问题,本文简单地介绍了裂隙岩体孔隙水压力的形成,同时采用三轴流变仪对砂岩进行常规三轴压缩试验和循环孔隙水压作用试验.将两个试验进行对比发现在经过水压循环作用后,砂岩在不同围压下的抗压强度均出现了不同程度的下降,说明循环孔隙水压对裂隙砂岩的强度造成了影响.同时,不同的围压砂岩强度的下降幅度不同,围压越大,抗压强度下降的幅度越小,这说明围压的大小能对循环水压作用下的裂隙岩体稳定产生影响.%The pore water pressure of fractured rock mass has an important influence on the strength and stability of rock slope. The problem of circulating pore water pressure is often encountered in many slope projects. In this paper, the formation of pore water pressure in fractured rock mass is briefly introduced. At the same time, the sandstone is subjected to conventional triaxial compression test and cyclic pore water pressure by triaxial rheometer. Comparing the two tests, it is found that the compressive strength of the sandstone under different confining pressures has decreased in different degrees after the hydrostatic circulation, which shows that the cyclic pore water pressure has an effect on the strength of the fractured sandstone. At the same time, the decrease of the strength of different confined sandstones are different, the larger the confining pressure and the smaller the compressive strength decrease, which indicates that the confining pressure can affect the stability of the fractured rock mass under the action of circulating water pressure.
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