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首页> 外文会议>Pipeline Division Specialty Conference; 20050821-24; Houston,TX(US) >A Case History of Scour Impacted Pipelines in River Crossings Part II - Structural Repairs
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A Case History of Scour Impacted Pipelines in River Crossings Part II - Structural Repairs

机译：穿越河流冲刷影响管道的案例历史第二部分-结构维修

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摘要

Two major water supply pipelines, (48/42 and 51-inch [122/106 and 130 cm] diameter), owned by City of Everett, Washington, at five river and slough crossings (160 to 540 feet [50 to 165 m] wide) where parts of the pipelines had become exposed and unsupported because of scour. Two of the 51-inch [130 cm] diameter pipeline crossings required emergency repair. The underwater emergency repair consisted of repairing the damaged coating, driving steel piles alongside the sections of pipe that could be scoured, encasing the pipe in steel jackets at pile locations, bolting the jackets to the pipe and piles, and protecting the pipe by under-water tube steel fabricated screens and above-water rock-filled polyethylene mattresses. All investigation, scour analysis, design, procurement and fabrication were completed within 6 weeks. The mobilization of construction equipment on four barges at two sites and the emergency repairs at both crossings were performed simultaneously within 20 days to complete the construction prior to the impending flood season. This paper presents the structural evaluation, design of the emergency repairs, environmental aspects of the underwater construction, preparation of the construction documents, and the construction of the structural repairs to the pipeline.
机译：两条主要供水管道（直径分别为48/42和51英寸[122/106和130厘米]），由华盛顿埃弗里特市拥有，位于五个河流和泥沼交叉口（160至540英尺[50至165 m]）宽）管道因冲刷而裸露在外且无支撑的地方。直径51英寸（130厘米）的两个管道交叉口需要紧急维修。水下紧急修复包括：修复损坏的涂层，在可能被冲刷的管段旁边打入钢桩，将管子放在桩位置处的钢护套中，将护套用螺栓固定到管子和桩上，以及通过以下方式保护管子：水管钢制滤网和水上岩石填充聚乙烯床垫。所有调查，冲刷分析，设计，采购和制造均在6周内完成。在20天之内同时动员了两个地点的四艘驳船上的建筑设备，并紧急维修了两个过境点，以在即将来临的汛期之前完成施工。本文介绍了结构评估，紧急维修的设计，水下施工的环境方面，施工文件的准备以及管道的结构维修的施工。

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