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一、围堰范围及其定点工作概况1.丹江口第一期工程土石围堰,在汉江右岸。围堰范围,自右岸坝头联结点起,沿坝轴线向江中横伸392公尺,再纵向上游伸长318公尺,向下游伸长275公尺,于是,自上下游两端向岸上环转成横向抵岸边,上距联结点189公尺,下距联结点144公尺,成一梯形如蟹背状(见图1)。围堰轴线全长1,288公尺。在围堰外围有一道堆石中心线,距围堰轴线16公尺。围堰内还有分格围堰。沿围堰轴线水深一般5公尺,最深9公尺,最浅2——3公尺。
First, the cofferdam scope and its fixed-point work profile 1. The first phase of Danjiangkou earthworks cofferdam, in the right bank of the Han River. Cofferdam area, starting from the dam right bank junction, along the axis of the dam to the river to extend 392 meters, and then longitudinally extended 318 meters, down 275 meters, so, from both ends of the shore to the shore ring Turn into a horizontal shore to the shore, from the junction 189 meters, 144 meters away from the junction, into a trapezoidal crab dorsal (see Figure 1). Cofferdam axis length of 1,288 meters. There is a centerline of rockfill outside the cofferdam, 16 meters away from the cofferdam axis. There are cofferdam cofferdam cofferdam. Depth along the cofferdam axis is generally 5 meters, the deepest 9 meters, the shallowest 2--3 meters.