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。
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.
出处
《中国水能及电气化》
2011年第9期17-21,共5页
China Water Power & Electrification
基金
国家自然科学基金资助项目(50879069)
水利部公益性行业科研专项资助项目(2007SHZ1-200701004)
关键词
土石坝坝体
灌浆劈裂
水力劈裂
劈裂机理
断裂判据
split grouting
hydraulic fracturing
fracture mechanics
fracture factor
water wedge
