Abstract: The mast and substructure of a drilling rig is studied in a system of mast-substructure-base-foundation system.Calculation of the Static stresses in the mast and substructure has been done with finite element method.The sink of the ground surface was calculated with both Winkler's model and limited compressibility model.Simplified treatment of all types of bases was proposed.Finally,a sample of systematic mast and substructure calculation was done with successive iteration.A special-purpose computer program for systematic analysis of mast and substructure was developed and practical calculation was compared with the results calculated with previous method.Valuable conclusions for design and research were given.

摘要： 本文提出了在井架/底座/基础/地基四者共同工作的整体系统中研究井架和底座的观点,并据此观点系统地研究了井架和底座的静力计算理论:在结构有限元计算理论的基础上,用文克尔和有限压缩层两种地基模型进行地基的沉陷计算;对各种类型的基础进行了简化处理;最后,通过采用逐次逼近的迭代法,给出了接近实际工况的井架,底座系统计算方法.本文根据研究的理论,编制了系统分析井架、底座的专用程序,进行了实例计算,并与过去计算方法所得的结果进行了对比分析,得出了对设计和研究具有重要参考价值的结论.

关键词: 井架底座, 文克尔模型, 有限压缩层, 地基上, 地基模型, 简化处理, 计算理论, 地基沉陷, 系统分析, 迭代法