摘要
水利工程下游的河道受清水下泄影响,冲刷深度可能加大。为合理确定河流穿跨越方案,以某油气管道龙津溪穿越为例,采用64-1公式计算穿越处的河道冲刷深度;建立穿越处的二维水沙数学模型,对河流的冲淤变化进行计算验证。结果表明:在考虑上游枋洋水利枢纽工程影响后,冲刷深度增加2.8 m,冲至岩石层。在此基础上,对开挖及定向钻穿越方案进行了比选,以此为依据确定龙津溪采用定向钻方案试穿实施,为今后类似工程设计施工提供参考。
The watercourse downstream of water project was affected by water erosion and scour depth may increase. To reasonably determine the river crossing scheme,taking a case study of oil and gas pipelines of the Longjin river crossing,64- 1 formula was calculated in the river crossing scour depth. The two-dimensional mathematical model of the crossing site was established,and the river erosion and deposition changes were calculatied and verified. The results show that after considering upstream Fangyang impact hydro project,scour depth increases 2. 8 m,rushing to the rock layer. Based on this data,excavation and directional drilling scheme were compared. Longjin river as a basis for determining the use of directional drilling program tries to implement,providing a reference for future similar engineering design and construction.
出处
《管道技术与设备》
CAS
2016年第4期12-14,38,共4页
Pipeline Technique and Equipment
关键词
二维水沙模型
冲刷深度
管道
穿越方案
two-dimensional mathematical model
scouring depth
pipeline
crossing scheme
