中文摘要：

从发生机理、变形机理和力学机理方面对土石坝坝体的灌浆劈裂与水力劈裂进行了比较研究。基于断裂力学理论,将灌浆劈裂分为土体挤密、土体拉裂和土体断裂发展三个阶段进行了断裂机理分析,将水力劈裂的土体断裂发展分为浅层裂缝、深层裂缝和穿透型裂缝形成三个过程进行了断裂机理分析,并分别给出了断裂判据。

英文摘要：

The occurrence mechanism, deformation mechanism and mechanics mechanism of split grouting and hydraulic fracturing are compared, the process of split grouting is composed of three stages： soil campaction, soil crack and soil frature development. Mechanics mechanism is studied in detail of split grouting and hydraulic fracturing, based on fracture mechanics theory, frature criterion is given finally. Studies have shown that the both belong to the scope of hydraulic fracturing, but the mechanism of split grouting is more complicated than the mechanism of hydraulic fracturing, split grouting is divided into three stages, but there is only one stage of hydraulic fracturing。Mastering the various stages of the mechanism has guiding significance for the study of the split grouting and hydraulic fracturing.