自上向下逐层延深施工法,就是将较深的沉淀池分成上、中、下若干施工层,先挖上层土方,绑扎钢筋,支模浇注混凝土,然后再进行第二层土方开挖和混凝土浇筑。如此往下一层层地挖土,直到板底。它是利用池壁与周围粘土的摩擦力将各层壁体“悬挂”在上面,随后制作下层池壁。层与层交接处留一水平施工缝,每层则不留施工缝。为确保各层之间接缝严密,下层池壁制作时要比上层底部稍高些,并凸出池壁,形成绕池壁一周封闭或间断的“小牛腿”。待混凝 From the top to the bottom, the deeper layer-by-layer construction method is to divide the deeper sedimentation tank into several construction layers of upper, middle and lower layers. Dig up the upper layer of earthwork first, tie the reinforcing steel, and mold the concrete, and then perform the second layer of earth excavation. And pouring concrete. So dig the ground layer by layer until the bottom of the board. It uses the friction between the pool wall and the surrounding clay to “hang” the walls of each layer, and then creates the lower pool wall. A horizontal construction joint is left at the junction of layers and layers, and no construction joints are left on each layer. In order to ensure tight seams between the layers, the lower pool wall is slightly higher than the bottom of the upper layer and protrudes from the pool wall to form a “small calf leg” which is closed or interrupted around the pool wall for one week. To be coagulated