一、工程概况在辽河油田至鞍山的一条长距离输油管线施工中,共要穿过七条河流,其中穿越太子河是较大的一项工程。穿越段芯管是φ426×7mm的 T/S-52K 钢管,套管为φ630×7mm的钢管,环形空间灌注水泥浆,复壁管全长为270m,芯管工作压力为6.4MPa(64kgf/cm~2)。当时,太子河水宽150m,最大水深2.8m,水中泥砂含量较少,河水流量较洪水期小得多,为190m~3/s 左右,穿越点过水断面平均流速为0.7m/s,最大流速为1.11m/s,结合现场实测 I. Project Overview During the construction of a long-distance oil pipeline from Liaohe Oilfield to Anshan, a total of seven rivers were to be traversed. Among them, crossing the Taizi River was a larger project. The cross-section core pipe is φ426 × 7mm T / S-52K steel pipe, the casing is φ630 × 7mm steel pipe, the annular space is filled with grout, the total length of the double wall pipe is 270m, the working pressure of the core pipe is 6.4MPa (64kgf / cm ~ 2). At that time, the water of Taizi River was 150m wide and the maximum water depth was 2.8m. There was less sediment in the water. The flow of the river was much smaller than that of the flood, which was about 190m ~ 3 / s. The average flow velocity across the point was 0.7m / s, 1.11m / s, combined with field measurements