Aiming at the new layout form and the U-shaped groove track foundation of Yangshan phase IV automatic terminal storage yard,the twice construction technology of the track groove is put forward,and the structural safety of the track is analyzed by numerical simulation.The results show that under the design track load,the vertical stress at the interface of the track groove is within ±0.4 MPa,and the safety of the track structure can be ensured.The construction of the track’s twice construction widens the construction channel,improves the construction machinery’s efficiency significantly,and ensures the construction quality.Uneven settlement exists in track construction with a maximum cumulative settlement of 179 mm,and the settlement difference among different measuring points in the same track is up to 100 mm.The twice construction technique proposed solves the problem of both the construction channel of the automatic terminal yard and the settlement of the track foundation in the construction period.