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首页> 外文会议>MWWD amp; IEMES 2012 >Installation of large diameter pipelines. Analysis of different methods through 3 examples: Terga, Al Khalij and Rabat projects
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Installation of large diameter pipelines. Analysis of different methods through 3 examples: Terga, Al Khalij and Rabat projects

机译：安装大口径管道。通过3个示例分析不同的方法：Terga，Al Khalij和Rabat项目

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Over recent years, more and more projects involving large diameter marine pipelines for waste water disposal, power plant coolingrnand desalination plants have been achieved.rnMany different designs have been developed in order to match the plant requirements and the site constraints. This leads to a largerndiversity in terms of pipeline diameter, length, material, diffuser, intake head, shore crossing method and installation method.rnThis paper is not exhaustively detailing all the possible variations but is describing three typical examples through projects carriedrnout by Geocean which give a good overview of the most common cases.rnThose projects are the following:rn1. Al Khalij power plant project (Libya):rn1.1 4 GRP Intakes pipelines 3m diameter, 1100m long each with concrete intake headsrn1.2 4 GRP Discharge pipelines 2.8m diameter, 500m long each with diffusers.rn1.3 Shore crossing done with temporary breakwatersrn2. Terga power plant project (Algeria):rn2.1 5 HDPE Intakes pipelines 2m diameter, 750m long each with steel intake headsrn2.2 Shore crossing done with open trench in rockrn3. Rabat Waste Water outfall project (Morocco):rn3.1 1 HDPE outfall pipeline 2m diameter, 1150m long with diffuser.rn3.2 Shore crossing done with tunnelling (800m)rnIn each case the process which leads to the choice of shore crossing and installation methods will be detailed and explained in orderrnto demonstrate that large diameter pipeline projects are not just bigger version of small ones but present complex engineering,rnenvironmental and construction challenges which require experienced contractors and Engineers.
机译：近年来，越来越多的涉及大直径海洋管道用于废水处理，电厂冷却和海水淡化厂的项目得到了实现。为了满足电厂要求和现场限制，已经开发了许多不同的设计。这导致管道直径，长度，材料，扩压器，进水口，岸上穿越方法和安装方法的多样性。本文没有详尽地详细介绍所有可能的变化，而是通过Geocean开展的项目描述了三个典型示例，这些示例给出了很好地概述了最常见的情况。这些项目如下：rn1。 Al Khalij电厂项目（利比亚）：rn1.1 4 GRP取水管道直径3m，每条长1100m，带有混凝土进水头rn1.2 4 GRP排水管道，直径2.8m，长500m，每条带扩散器。rn1.3临时跨岸防波堤2。特尔加电厂项目（阿尔及利亚）：rn2.1 5 HDPE取水管道直径2m，长750m，每个管道带有钢制进水口rn2.2岩石上的裸露沟槽进行岸上穿越3拉巴特废水排污项目（摩洛哥）：rn3.1 1条HDPE排污管道，直径2m，长1150m，带扩散器。rn3.2隧道穿越岸线（800m）rn在每种情况下，都需要选择跨岸和安装的过程将详细说明这些方法，以证明大直径管道项目不仅是小型管道项目的较大版本，而且还面临复杂的工程，环境和施工挑战，需要经验丰富的承包商和工程师。

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