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汾河二库大坝为碾压混凝土重力坝,在基础开挖中砂砾料覆盖深度达30 m ;上游围堰施工,围堰堰体采用 P V C 土工布防渗,地基采用高压旋喷桩,摆喷桩,灌浆处理地基28 m 深入到基岩;在两岸高边坡(105 ~95m ) 开挖中采用了预裂孔及深孔爆破,应用孔外微差分段爆破技术取得良好的施工效果;在大坝基础岩石开挖中采用一次性保护层开挖新技术,经试验测试及竣工验收,达优良工程的标准。
Fenhe second reservoir dam RCC gravity dam, sand and gravel in the foundation excavation cover depth of up to 30 m; upstream cofferdam construction, cofferdam body with P V C geotextile seepage, the use of high pressure grouting pile foundation , Pendulum spray pile and grouting treatment foundation 28 m deep into the bedrock; pre-cracking and deep-hole blasting were adopted in the excavation of high-side slope (105 ~ 95m) of the both banks, and good construction effect ; In the dam foundation rock excavation using disposable protective layer excavation of new technology, the test test and the completion of acceptance, up to the standards of good works.