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《工程(英文)》 >> 2017年 第3卷 第6期 doi: 10.1016/j.eng.2017.11.007

米德湖3号取水口

a Arup Group Limited, New York, NY 10005, USA
b S.A. Healy Company, Salini Impregilo Group, Las Vegas, NV 89074, USA

发布日期: 2017-12-30

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摘要

在美国西南部持续干旱的作用下,为了维持拉斯维加斯山谷既有水容量,南内华达水资源管理局在米德湖中新建了一个深水取水口(3 号取水口)。本项目包括一口185 m 深的竖井、十分困难的地质条件下4.7 km 的隧道以及沉没式取水口海事工程。本文介绍设计和施工过程中积累的经验以及为解决隧道开挖过程中遇到的困难而采取的创新性解决方案,隧道开挖采用双模式泥浆隧道掘进机(TBM),压力高达15 bar(1 bar=105 Pa)。其中特别介绍了掘进机开挖过程中克服的主要挑战,包括作业模式、开挖面支撑压力、预注浆和维护;取水口的施工,涉及用锥形炸药爆破的水下竖井开挖;创造性地建设1200 t 以上的混凝土- 钢取水建筑物;取水建筑物在水下竖井中的就位;与混合式掘进机开挖的取水隧道的对接。

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参考文献

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