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一近年来喷射混凝土支护已广泛用于地下工程。在研究喷射混凝土与围岩共同抵抗地压作用的机理、力学特性等方面取得了不少的成果。但是由于喷射混凝土地下工程一般处于地下水位以下,长期或季节性受地下水的包围渗透等的危害作用,因此地下喷射混凝土工程的抗渗防水问题急待解决,现在关于这方面的研究正在探索之中。众所周知,喷射混凝土由于受骨料,回弹率、速凝剂、水灰比、施工机械、施工方法等的限制,使其密实性较普通防水混凝土差。这不仅影响到喷射混凝土抗压强度的质量,而且
In recent years, shotcrete support has been widely used in underground engineering. In the study of shotcrete and rock together to resist the role of ground pressure mechanism, mechanical properties and achieved a lot of results. However, due to the jet grouting underground engineering is generally below the groundwater level, long-term or seasonally affected by the groundwater infiltration and other hazards, so the underground jet concrete waterproofing seepage problems urgently need to be solved, and now on this aspect of the research is being explored . As we all know, shotcrete due to the aggregate, rebound rate, quick-setting agent, water-cement ratio, construction machinery, construction methods and other restrictions, making it more compact than normal waterproofing concrete. This not only affects the quality of compressive strength of shotcrete, but also