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湖南省常宁县亲仁河坝电站用灌注法浇筑水下混凝土,修补了水泵房和三角堤被损坏的基础工程。修补后的混凝土强度比水上现浇混凝土还要高。混凝土灌注范围的最大园径达26米,超过了上海水下灌浆最大园径10米(截至1982年)的先进指标。这个电站的水泵房和三角堤修建后,基础部分被水掏空,长达37.5米,缝深3.55米,纵深4米。过去通常采用围堰排水现浇混凝土修补,不仅造价高,而且工期长。据工程估算,仅围堰就要10万元以上,加上排水和混凝土工程费用,至少要30万元,工期需3—4个月。为了抢时间,减少工程费用,电站在广东省四防局的帮助下,采用此法,25天就全部完成,比预计
Changning County, Hunan Province, pro-Heren dam pouring method of pouring underwater concrete, repaired the pump house and the delta embankment was damaged infrastructure. The strength of the repaired concrete is even higher than that of the water cast-in-place concrete. The maximum diameter of concrete pouring range of 26 meters, exceeding the maximum diameter of 10 meters of Shanghai underwater grouting (up to 1982) advanced indicators. After the construction of the pump house and delta embankment of this power station, the foundation part was emptied of water, reaching 37.5 meters long, with a seam depth of 3.55 meters and a depth of 4 meters. In the past usually used cofferdam pouring concrete repair, not only costly, but also long duration. According to the project estimate, only cofferdam will be more than 100,000 yuan, plus drainage and concrete engineering costs, at least 300,000 yuan, duration of 3-4 months. In order to grab the time and reduce the cost of the project, the power station in Guangdong Province, with the help of four Defense Bureau, using this method, 25 days to complete, than expected