2.1　Track Intersection in Turnout Area

The handing over and taking over of data for CP Ⅲ control network shall be arranged first.According to the requirement of track intersection，the plane position and height of track in turnout area shall be tested by using CP Ⅲ control network.Prior to ballastless track construction，the compliance report must be obtained for track settlement assessment presented by the owner or consulting organization.

Turnout benchmark shall be proplery overlapped with track GRP at the intersection of slab type turnout with the track.Before the slab type turnout was constructed for Beijing-Shanghai high speed railway，and the track was not constructed，3～5 temporary benchmark piles were erected at front and back side of the turnout to create conditions for later track overlapping.