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一、基本情况: 哈尔滨市万宝灌区位于松花江左支流左岸,这条支流到灌溉站前又分成左、右两条岔河,两河中间为滩地。由于历年洪水冲刷,左岔河主流紧临堤脚,到1982年,灌溉站下游赵木堤防,当江水位在115.5m高程时,水面以上有2m高的塌坡,水面以下有4m冲坑,该段堤防呈现6m高的险坡,为使左叉河改变流势,1983年曾拟在汛前于左叉河下口修一道3m高的潜水坝。需石方3000m~3米,草袋装土1500m~3,在潜水坝上游冲填泥沙以期保堤。由于工期短,施工难度大,且汛前
First, the basic situation: Wanbao irrigation area in Harbin is located on the left bank of the Songhua River left tributary, this tributary into the irrigation station is divided into left and right two Chahe, the middle of the two rivers for the beach. Due to the years of flood erosion, the mainstream of the Zu Chahe River is immediately adjacent to the embankment. By 1982, when the water level at the lower reaches of the irrigation station reached 115.5 m, there was a 2 m high slope above the water surface and a 4 m red hole below the water surface. The embankment showed a dangerous slope of 6m in height. In order to change the situation of the Zucha River, it was planned to build a 3m-high submersible dam under the Zuofu River before the flood season in 1983. Requires stone 3000m ~ 3 meters, grass bagged soil 1500m ~ 3, in the upper reaches of the submersible dam filled sediment in order to keep the dike. Due to the short construction period, the construction is difficult, and before the flood season