南水北调中线穿黄工程施工研究

南水北调中线穿黄工程是引汉总干渠中最在的跨河建筑物，该工程越黄河干流，工程规律大，施工难度高，工期长，是整个南水北调中线工程的关键工程，穿黄工程所处河段黄河宽度约７－９．５ｋｍ，为游荡性河道，河床覆盖层为粉细砂、细砂、中砂及粘土，厚度达４１－９４ｍ。工程设计输水流量５００ｍ＾３／ｓ，以输水渡槽及输水隧道两种主要型式及牛口峪，孤柏咀两条线路进行过多种方案的工程布置研究。本文重点介绍经比较推荐的孤柏咀

On construction of structures crossing the Yellow River for middle route S-to -N water transfer project

Structures crossing the main stem of Yellow river for the middle route water transferring project are the largest .river -crossing structures of the main canal diverting water from Hanjiang river. They are also the key works of the Whole middle route project for theit large scale, great difficulties in construction and long constriction period. The river section to be crossed by the structures is about 7-9. 5km wide, and is,offm.andering river with its overburden, 41 - 94 m thick, of silt sand, fine sand, medium sand and clay. The design divers-ion discharge through the structures is 500 m3/s, Arrangements of works of several schemes have been studied in two main structural types: delivery aqueduct and delivery tunnel, and in two routes passing through Niukougu and Gubaizui respectively. This paper mainly presents stUdies on construction of the recommended double tunnel to be driven by shield method to pass through Gubaizui,and of the alternative aqueduct to pass through Niukougu.