【作者】 程莹；

【导师】 王贵春；

【作者基本信息】 郑州大学 ， 建筑与土木工程（专业学位）， 2013， 硕士

【摘要】 本文简单介绍了地下管线非开挖施工技术的概念,评述了钻杆力学的研究现状以及发展趋势。由于导向钻杆是导向钻进施工中受力最复杂和工况最恶劣的构件,因此,选取导向钻杆作为研究对象,对其各种应力状态进行分析。基于有关力学理论,论述了钻杆各种应力分析的基本方法。利用ANSYS有限元分析软件对钻杆整体应力和一般截面的应力进行分析,找到了最大米赛斯应力的分布位置,得出了钻杆曲率半径对最大应力的影响规律和扭矩对钻杆应力的影响以及一般截面上应力的分布规律。此外,钻杆接头是导向钻进施工中最容易受破坏且应力集中的部位,因此,利用ANSYS软件对不同钻杆接头外径情况下的应力和变形进行计算分析,并对其进行结构屈曲分析。得出了钻杆接头外径对钻杆中等效弯曲应力和竖向变形以及钻杆临界屈曲荷载的影响规律,以便在实际工程中为合理选取钻杆接头提供借鉴。更多还原

【Abstract】 In this paper, the concept of trenchless construction technology of underground pipelines is introduced, and the current research situation and developing trend about drilling rod mechanics are reviewed. As the guide drill rod is subjected to the most complicated stress and the harshest working condition among all components in drill system, it is taken as the research object to analyze its stress status.Based on the relative mechanics theories, the basic methods to analyze the various stress in dill rod are elaborated. The overall stress and general section stress of the drill rod are analyzed by using the ANSYS finite element method analysis software. The position of the most Mises stress distribution is found, and the influences of drill rod curvature radius on maximum stress, and those of torque on drill rod stress are obtained. Besides, the stress distribution regulations in general section is obtained.In addition, the rod joint is the most susceptible to damage and stress concentration during the oriented drilling construction, so the stress and deformation analysis on drill rod with different rod joint diameters and the structural buckling analysis are performed by using ANSYS software. The influence of rod joint diameter on equivalent bending stress and vertical deformation, and critical buckling load are obtained. The relative research results can provide the reference for selecting drill rod joint in engineering.更多还原