CAJ | 학술논문

利用黏土心墙料开展了室内条件下的水力劈裂试验，并通过 CT 仪对试验前后试样的结构形态进行了研究，分析了水力劈裂发生时试样中的裂缝状态变化、劈裂的发生机理及影响因素。研究结果表明，利用图像观测手段可以很好地观察水力劈裂过程中土体裂缝的产生过程及其具体形态；水力劈裂试验显示，均质试样不会出现劈裂现象，而初设裂缝试样在较高水压下出现了水力劈裂现象，CT 图中发现了贯穿的裂缝，且试样内部结构变化较大；验证了水力劈裂中的“水压楔劈”效应，认为土体贯穿性破坏是张拉作用导致的。
이용점토심장료개전료실내조건하적수력벽렬시험，병통과 CT 의대시험전후시양적결구형태진행료연구，분석료수력벽렬발생시시양중적렬봉상태변화、벽렬적발생궤리급영향인소。연구결과표명，이용도상관측수단가이흔호지관찰수력벽렬과정중토체렬봉적산생과정급기구체형태；수력벽렬시험현시，균질시양불회출현벽렬현상，이초설렬봉시양재교고수압하출현료수력벽렬현상，CT 도중발현료관천적렬봉，차시양내부결구변화교대；험증료수력벽렬중적“수압설벽”효응，인위토체관천성파배시장랍작용도치적。
Hydraulic fracturing test is carried out for clay core naterial,and CT instrunent is applied to study the sanple shape before and after the test,so as to analyze the crack state variation,fracturing fornation nechanisn and its influential fac-tors. The results show that the inage observation is a qualified nethod for studying the generating process and detail shape of cracks during hydraulic fracturing. It is concluded that honogeneous sanples give no access to hydraulic fracturing,however the hydraulic fracturing is found in the sanples with initial crack under high water pressure,and penetrating cracks that create signif-icant change for inner soil structure are observed by CT test. The test results validate the "water pressure fracturing effect" in hy-draulic fracturing phenonenon,and the opinion that penetrating crack is induced by tension effect.