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仅有大地测量控制网的测点是不够的 ,还应该沿铁路全线每隔 1ｋｍ布设新的高精度测点 ,形成一个强有力的骨干网。在这些主要测点之间沿轴线每隔 2 0 0ｍ在两旁布设成对的副测点。此外对每一座桥梁、每一座隧道布置一个专门的工程测量网 ,连接每一结构物的两端。对所有这些网点
It is not enough to only measure the geodetic control network, and new high-precision measuring points should be laid every 1km along the railway line to form a strong backbone network. Between these major measuring points along the axis every 200m on both sides of the paired auxiliary measuring points. In addition to each bridge, each tunnel layout of a dedicated engineering measurement network, connecting the ends of each structure. For all these outlets