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一、概况横锦水库位于浙江省东阳县城东27公里。控制流域面积383.26平方公里。坝高57.5米,为一土坝,总库容2.8亿立米,是一座以灌溉、防洪为主兼发电、养鱼等综合利用的大型水利工程。该水库于1958年开始兴建,1964年基本建成。1977年保坝设计中,在右岸增建了长415米,内径3.0米的放空隧洞一条。由于隧洞进水口是在已建水库正常高水位以下32.0米深处,采用其它方法施工较困难。为确保水库在正常运行情况下施工,因此采用水下岩塞爆破的先进技术。1984年9月15日爆通成功,为我省在大中型水库工程上采用这一先进技术填补了空白。这是继密云水库以后国内第八个采用水下岩塞爆破技术的工程。
First, the overview Hengjin Reservoir is located in Dongyang County, Zhejiang Province, 27 kilometers east. Control basin area of 383.26 square kilometers. The dam is 57.5 meters high, an earth dam with a total storage capacity of 280 million cubic meters. It is a large-scale water conservancy project that integrates irrigation, flood control and power generation and fish farming. The reservoir began construction in 1958, basically completed in 1964. During the design of the dam in 1977, an additional 415m long and 3.0m diameter tunnel was built on the right bank. Since the inlet of the tunnel is 32.0 meters below the normal high water level of the built reservoir, construction by other methods is more difficult. To ensure that the reservoir is constructed under normal operation, advanced technology for underwater rockbolt blasting is used. September 15, 1984 success burst, for the province in large and medium-sized reservoir project to use this advanced technology to fill the gap. This is the eighth project in China that uses underwater rock burst technology after Miyun Reservoir.