水平定向钻穿越方案设计方法研究

水平定向钻穿越方案的设计，目前多依靠施工队伍的经验来完成，缺乏必要的理论依据。文章从入土点选取与曲线结构优化两个方面对比分析了垂直平面法、斜平面法和动态规划法三种水平定向钻穿越方案的设计方法，修正了现行的垂直平面法。分析表明，入土点应根据钻机场地要求与地质条件进行选取；垂直平面法最具实际应用价值，并解决了现行方法所得曲线不光滑问题；扩孔比是方案设计的一项重要参数，与穿越管道的管径、长度以及施工队伍的水平有定性关系。

Research on Design Methods for Pipeline Crossing with Horizontal Directional Drilling

At present,the scheme design of pipeline crossing,as the first step of horizontal directional drilling(HDD) construction,depends mostly on the experience of contractor and is lack of necessary theories.For this issue,the paper presents a comparison of three design methods including vertical plane,oblique plane and dynamic programming in two aspects of drilling entrance selection and bore-path profile optimization,and revises the present vertical plane method.The analysis shows that the drilling entrance poi...