Trenchless construction of Phase IIIA District Cooling System (DCS) by TBM pipejacking and hand-dug tunnelling on Kai Tak Development : Part II – The challenges

Q2 Engineering Transactions Hong Kong Institution of Engineers Pub Date : 2019-05-25 DOI:10.33430/V26N1THIE-2017-0002

Wilson W S Mok, Victor K Lo, Germaine T M Chau, Louis Y M Lau

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Abstract

This paper discusses the challenges of constructing 1.75 km of concrete sleeve pipelines with diameters of 1,200mm, 1,500mm and 2,800mm using slurry operated Tunnel Boring Machines (TBMs) for installing District Cooling System (DCS) pipelines in highly variable ground conditions within the Kowloon Bay area. It covers the problems encountered, solutions provided, and recommendations made. Various construction techniques are also discussed including: running two TBMs in parallel from a jacking pit for the near simultaneous construction of two pipelines; enlarging the lower section of a receiving pit by the caving method to receive the TBM which entered the pit at an oblique angle, for turning inside the pit for removal after skin-off of the TBM; construction of a hand-dug tunnel from a receiving pit to receive three TBMs one at a time in a triangular configuration to suit site constraints. This paper should be read together with Part I which is entitled “Design and Construction Considerations” published in 2017.

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启德发展计划第三期第二期区域供冷系统的隧道掘进机顶管及手挖隧道非开挖施工:第二部分-挑战

本文讨论了在九龙湾地区高度多变的地面条件下，使用泥浆操作的隧道掘进机(tbm)建造直径为1,200毫米、1,500毫米和2,800毫米的1.75公里混凝土套管管道以安装区域供冷系统(DCS)管道的挑战。它涵盖了遇到的问题、提供的解决方案和提出的建议。本文还讨论了各种施工技术，包括:从顶坑平行运行两台掘进机，几乎同时施工两条管道;采用崩落法扩大接收坑的下部，以接收以斜角进入坑内的TBM，以便在TBM剥皮后在坑内转出;在接收坑中建造一条手工挖掘的隧道，以适应场地的限制，以三角形结构一次接收三台隧道掘进机。本文应与2017年出版的第一部分“设计和施工注意事项”一起阅读。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Transactions Hong Kong Institution of Engineers Engineering-Engineering (all)

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2.70

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