1工程概况穿沁工程是南水北调中线工程总干渠河南省渠段黄河以北最大的建筑物,建筑物总长1212m,设计过水流量265m~3/s,加大流量320m~3/s,采用3孔钢筋混凝土箱形结构,单孔尺寸6．9m×6．9m。建筑物建基面高程84．0m,基础开挖深度达27m,边坡大部分为砂质,开挖除揭穿全新统承压水外,中更新 1 Project Overview The project of Qinchuan is the largest trunk of the mid-route of the South-to-North Water Diversion Project. The largest building to the north of the Yellow River in the drainage channel of Henan Province is 1248m long, with a design flow of 265m 3 / s and a flow of 320m 3 / s. Hole reinforced concrete box structure, single hole size 6.9m × 6.9m. The building surface elevation of 84.0m, the basic excavation depth of 27m, most of the slope for the sandy, Excavation in addition to exposing the new system of pressure water, the update