中文摘要：

通过对人工劈裂的节理试件进行水泥灌浆加固处理,并进行一系列室内压剪试验,总结了灌浆节理面压剪全过程剪应力-剪切位移的典型曲线形式,分析了充填度和法向应力对灌浆节理的变形、强度特点的影响规律,总结了由充填度决定的灌浆节理两种压剪破坏形式,揭示了其破坏机制.研究结果表明,低法向应力下灌浆节理面表现出脆性破坏特点,峰值剪切强度大于无灌浆节理面的,而在高法向应力条件下,灌浆节理面有一定的延性,峰值剪切强度小于紧密闭合且吻合系数较高的无灌浆节理面的;当充填度大于1.0时,各个充填度的灌浆节理面剪切强度差异较小.研究成果加深了对灌浆节理压剪破坏特性的认识,并具有一定的工程指导意义.

英文摘要：

Joint specimens made by split method were reinforced by cement-grouting,and a series of laboratory compression-shear test was conducted.The typical shear stress and shear displacement curve form of grouted joints during the whole process of compression-shear was summarized.The influence rules of filling percentage and normal stress on deformation and strength characteristics of grouted joints were analysed.Two kinds of compression-shear damage forms of grouted joints which were determined by filling percentage were summarized;and the failure mechanism was revealed.The research results show that under low normal stress grouted joints display the characteristics of the brittle failure behavior;and the peak shear strength is higher than that of natural joints surface.However,under high normal stress grouted joints show some ductility;and the peak shear strength is lower than that of natural joints which are tightly closed and well matched.When the filling percentage exceeds 1.0,the shear strength of grouted joints in different filling percentages under the same normal stress have small gaps.The conclusions are helpful for understanding the compression shearing damage characteristics of grouted joints,and also have some directive significance for engineering practice.