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地下工程中采用锚喷支护代替钢、木支撑和混凝土衬砌,近年来日益受到广大工程技术人员的重视。现在锚喷支护不仅广泛用于临时支撑,而且已多次用于一些大中型水利水电工程的永久支护。但是,用传统的干式喷射法喷射混凝土,水泥用量多,回弹多,粉尘大,而且混凝土层的质量有时也不易保证。1980年,山东省水利科学研究所开始学习研究日本的SEC法新工艺(水泥裹沙喷射混凝土),1984年,该所与第十二工程局合作,在渔子溪二级水电站引水隧
In the underground project, the use of anchor and shotcrete support instead of steel, wood support and concrete lining, in recent years increasingly by the majority of engineering and technical personnel attention. Now anchor spray support is not only widely used for temporary support, but also has been used for many permanent support of large and medium-sized water conservancy and hydropower projects. However, with the traditional dry jet method of shotcrete, more cement, more rebound, dust, and the quality of the concrete layer is sometimes not guaranteed. In 1980, Shandong Institute of Hydraulic Research began to study and study Japan’s new SEC process (cement sand blasting shotcreting). In 1984, in cooperation with the Twelfth Engineering Bureau,