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渠道中线测量的主要任务是在实地量出渠线的长度,并打下中心线桩。从而将渠线的平面位置用一系列的桩,在现场具体标定出来。一、渠道中心线桩的一般标定标定渠道中心线桩是在丈量渠线长度的同时,在渠道中心线上设置“里程桩”和“加桩”。所谓里程桩就是每隔一定距离在中心线上打下一个标明里程的木桩,一般是每隔100米或50米打一桩,对于小型渠道也可采用间隔小于50米的里程桩。当渠线穿越山沟、山岗等地形变化较大的地方和重要地物(如公路、沟渠等)的地方,以及渠线上拟修建筑物(如涵洞、跌水、渡槽等)的中心位置或起终点,均要增打一些桩,叫做加桩。里程桩和加桩通称中心线柱(简
The main task of channel centerline measurement is to measure the length of the channel in the field and lay down the centerline stake. Thus, the plane position of the ditches will be calibrated on site with a series of piles. First, the centerline of the channel centerline calibration General centerline channel calibration is to measure the length of the canal at the same time, in the centerline of the channel set “mileage pile” and “plus pile.” The so-called mileage pile is at a certain distance in the centerline to lay a marked mileage of the pile, usually every 100 meters or 50 meters a pile, for small channels can also be used less than 50 meters distance pile. Where the canal line passes through areas such as ravines and hills where the terrain changes greatly and important features (such as roads and ditches), as well as the center position of the proposed buildings (such as culverts, falls, aqueducts, etc.) on the canal line Or from the end, have to play some pile, called pile plus. Mileage pile and pile plus known as the center line (Jane