论文部分内容阅读
由四川石油勘探设计院设计、四川省石油管理局油建公司第三工程处施工的泸—威线天然气输送管道长江二龙口水下穿越工程,系四川省1989年的重点抢建工程项目,穿越处江面宽540m,最大水深为12m,江心流速为4.7m/s,水下为砂夹卵石层,过江管道为φ426×15mm钢管,外有φ630×8ram钢保护套管。为防止该管段建成后遭受冲刷,故设计
Design by the Sichuan Petroleum Exploration and Design Institute, Sichuan Petroleum Administration Oil Construction Company Third Engineering Construction Luzhou - Wei line natural gas pipeline Yangtze River Erlongkou underwater crossing project, the Department of Sichuan Province in 1989 focused on building projects grab through Department of the river wide 540m, the maximum depth of 12m, the center of the river flow rate of 4.7m / s, underwater sand and gravel layer, the pipeline is φ426 × 15mm steel pipe, outside φ630 × 8ram steel protective sleeve. In order to prevent the pipe after the completion of the erosion, so the design