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综述了国内外关于土质心墙水力劈裂问题的典型试验及其研究成果,并进行了相应的分析和讨论.研究表明:试验研究在土质心墙水力劈裂研究方面具有不可替代的作用;许多研究者根据试验结果提出了土质心墙水力劈裂破坏的力学机理和相应的水力劈裂发生判断准则,但尚无一套有效的试验方法、手段能够对土质心墙水力劈裂的发生条件和破坏过程进行模拟;将土工离心模型试验技术应用于初次蓄水土质心墙坝的水力劈裂问题研究是可行的;可采用平面模型离心试验模拟坝体水力劈裂破坏断面,验证土质心墙水力劈裂的张拉破坏机理的合理性及其综合判断准则的有效性;心墙内外水压力的分布与变化,应力拱效应,以及应力诱导各向异性是土质心墙水力劈裂试验研究的主要内容,试验中应重点关注库水位上升过程中心墙上游面中上部的应力状态.研究结论也为今后的土质心墙水力劈裂问题的试验研究提供了有益的方向.“,”Typical experimental researches on hydraulic fracturing in the earth-and-rockfill dam with central soil core are reviewed,with corresponding analysis and discussion provided.It is shown that:(1) Experimental methods are necessary in the research on hydraulic fracturing in central soil core.(2) Based on the experimental results,several failure mechanisms and corresponding initiation judgment criteria for hydraulic fracturing have been put forward.However,there has been no effective experimental method to simulate the formation conditions and failure process of hydraulic fracturing.(3) It is feasible to apply centrifuge modeling technique to the research on hydraulic fracturing of earth-and-rockfill dams with central soil core in the initial impounding.(4) A plane-strain centrifuge test can be used to simulate the failure section in hydraulic fracturing to validate the tensile failure mechanism and its synthetic judgment criterion.(5) The major work of experimental research is to simulate the distribution and variation of water pressure inside and outside the central soil core,the stress arching effect,and the stress-induced anisotropy.And much attention should be paid to the stress state in middle and above upstream face of central core in the water level rising.The results present references for similar researches on hydraulic fracturing in central soil core.