穿越黄土陡坡管道斜井支护方式

Techniques Supporting Oil/Gas Pipeline Well in Traversing Loess Steep Slope

以陕西某地黄土边坡斜井穿越工程为例,利用数值模拟分析方法对斜井开挖支护过程进行了仿真模拟计算。通过对五种可能的开挖支护方式所引起的整个斜井洞周的受力变形特征、塑性区分布规律的对比分析,设计了该斜井合理的支护方式。研究结果表明,斜井的中间部位受力变形较大,支护过程中应重点关注。

Taking the oblique well crossing craft in a loess steep slope in some location of Shan'xi Province as an example,a method of numerical analysis is used to simulate and calculate excavation and support process of an oblique well.Five potential schemes are simulated and analyzed.After calculation,results including the stress,deformation of the cavern boundaries and distributive laws of the failure field are studied and compared.Based on these analyses,an optimum support scheme is given.Numerical simulation is performed to confirm the optimum support scheme.Result shows the middle of the oblique well should be highly focused on due to its large stress and deformation during supporting.