渠道施工放样的主要任务是:按每个中心桩的填高或挖深以及渠道设计横断面的尺寸,在实地标定出填挖范围和深(高)度,以便施工。其具体工作包括以下几方面: 一、振定中心桩的填高或挖深由于渠道从勘测设计到开始施工要有一段时间,施工前必须检查中心桩有无丢失或位置变动。如发现位置有疑问的中心桩,应根据附近的中心桩或转折点处的中心桩(此处为加固的中心桩)进行检测,以校核其位置的正确性。如有丢失应进行恢复。然后根据纵断面图上所计算各中心桩的挖深或填高数,分别用红油漆写在各中心桩上。二、边坡桩的放样为指导渠道的开挖和填土,需要在实地标明开挖 The main tasks of setting out of channel construction are to calibrate the filling and excavation range and depth (height) in the field according to the height of each center pile or the depth of digging and the size of the cross-section of the channel design for construction. The specific work includes the following aspects: First, the vibration center pile filling or digging depth As the channel from the survey and design to begin construction for some time, before construction must check the center pile loss or position changes. Where a center pile is found to be in doubt, the center pile or the center pile at the turning point (here, the reinforced center pile) should be inspected to check the correctness of its position. If lost should be restored. Then according to the longitudinal section of the calculation of the central pile digging depth or filling height, respectively, with red paint written on the central pile. Second, the lofting stake for the guide channel excavation and filling, the need to mark the field excavation