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首页> 外文会议>Pipeline Division Specialty Conference; 20050821-24; Houston,TX(US) >Horizontal Directional Drilling Using Ductile Iron Pipe - A Successful Paradigm Shift
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Horizontal Directional Drilling Using Ductile Iron Pipe - A Successful Paradigm Shift

机译：使用球墨铸铁管进行水平定向钻井-成功的范例转变

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摘要

The Canyon Regional Water Authority, New Braunfels, Texas, planned for the construction of a major system expansion that included a combination of 35,242 feet (10,742m) of 24 inch (610mm) and 41,625 feet (12,687m) of 30 inch (762mm) ductile iron pipe. Along the planned route there were four (4) sections designed for installation using horizontal directional drilling (HDD). The originally designed HDD installations required transitions from ductile iron pipe to high-density polyethylene (HDPE), the perceived standard piping material for HDD. Having identified this material paradigm within the trenchless industry, the successful bidding contractor approached the Engineer to request a material change for the HDD portions of the new transmission system. Informed about the suitability of ductile iron pipe for trenchless installation, a submittal was initiated which proposed that the HDPE pipe be replaced with flexible restrained joint ductile iron pipe for the HDD portions of the project. This requested change was thoroughly evaluated by the Owner and Engineer, whose affirmative decisions to proceed started the momentum of this paradigm shift. This paper will discuss the process by which the material change was evaluated from an engineering perspective, and from the perspective of the installing contractors, and the constructibility issues with installing ductile iron pipe by HDD.
机译：德克萨斯州新布朗费尔斯的峡谷地区水务局计划进行一次大型系统扩展，包括将35,242英尺（10,742m）的24英寸（610毫米）和41,625英尺（12,687m）的30英寸（762mm）组合在一起球墨铸铁管。沿着计划的路线，有四（4）个设计为使用水平定向钻孔（HDD）安装的部分。最初设计的HDD安装要求从球墨铸铁管过渡到高密度聚乙烯（HDPE），HDPE是HDD的公认标准管道材料。在确定了非开挖行业的这种材料范例之后，中标承包商与工程师联系，要求对新传输系统的HDD部分进行材料更改。得知球墨铸铁管适合非开挖安装的情况后，启动了一项提案，提议将HDPE管替换为该项目HDD部分的柔性约束联合球墨铸铁管。业主和工程师对这项要求的变更进行了彻底的评估，他们做出的肯定决定开启了这种范式转变的势头。本文将讨论从工程角度，从安装承包商的角度评估材料变更的过程，以及通过HDD安装球墨铸铁管的可施工性问题。

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