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某国家石油储备库工程设有8口深度超过100 m的进、出油竖井,采用在地面分段预制管道、先安装管道再安装钢支撑、锚固环的施工方式,成功完成了超深竖井内管道系统的安装施工。介绍了该施工方法的特点,探讨了地面分段预制管道、射线机可视化精确定位、桁架与吊篮系统的制作、枷锁式工装的制作等关键施工方法。主要工序包括:施工准备、井口系统及附件的安装、管道分段预制、竖井内管道安装、桁架与吊篮系统制作安装、竖井内钢支撑安装、竖井内防腐施工、管底泵套安装、管道试压。该方法避免了井内钢支撑结构对管道吊装入井的影响,减少了井内高空作业的工作量,降低了高空作业的安全隐患和施工成本,提高了整体安装功效。
A national oil reserve project has 8 inlet and outlet shafts with a depth of more than 100 m. The construction method of prefabricated pipelines on the ground, first installation of pipelines and installation of steel supports and anchorage rings has been successfully completed. Pipeline system installation and construction. The characteristics of the construction method are introduced, and the key construction methods such as the prefabricated pipelines on the ground, the visual positioning of the ray machine, the fabrication of truss and basket system and the manufacture of shackles are discussed. The main processes include: construction preparation, installation of wellhead system and accessories, prefabrication of pipelines, installation of pipelines in shafts, fabrication and installation of truss and basket systems, steel support installation in shafts, anti-corrosion construction in shafts, installation of pipe-bottom pump sets, Pressure test. The method avoids the influence of the steel support structure in the well on the hoisting of the pipeline, reduces the workload of the aerial work in the well, reduces the potential safety hazard and the construction cost of the aerial work, and improves the overall installation efficiency.