南水北调穿黄工程总体布置研究

Layout of structures crossing Yellow river for middle route S-to-N water transferring

穿黄工程系南水北调中线引汉总干渠跨越黄河干流的交叉建筑物，是总干渠上规模最大、技术最复杂、工期最长的关键工程。总干渠过黄河设计流量为每秒５００立方米，穿黄区黄河河宽７．０～９．５公里，河床覆盖层为粉、细砂、中砂及粘土，厚度达４１．０～９４．０米。对于总干渠穿黄线路及穿黄工程型式进行过８个方案的比较。重点介绍牛口峪线双渡槽方案与孤柏咀线全盾构法双隧道方案的设计原则及工程布置，并就工程的技术可行性进行了论证。

The structures crossing Yellow river play a key role in the middle route S-to-N water transterring project.They are tremendous,featuring quite complicated technology and a long period of construction.The design conveying capacity of them is 500 c m.s.,the span of them is determined at the large width of Yellow river(about 7～9.5 km)and the river bed overburden consisting of silt,sand and clay is of a total thickness up to 41～94m.For a best choice of the type of structures eight alternatives are studied.In this paper particular attention is paid to describing design considerations and general layout of the double aqueduct scheme at Niukouyu and the double tunnel scheme as well as their technological peculiarities;technological feasibility of them is analysed and affirmed.