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原文传递 MODIFICATION OF THE NAVIGABLE PASS ON LOCK AND WEIR NO’S 1 TO 10 AND 15 ON THE RIVER MURRAY, AUSTRALIA

题名：	MODIFICATION OF THE NAVIGABLE PASS ON LOCK AND WEIR NO’S 1 TO 10 AND 15 ON THE RIVER MURRAY, AUSTRALIA
作者：	D. PRZYBYLKO
关键词：	MODIFICATION ; NAVIGABLE PASS; LOCK
摘要：	To provide navigation during low flow periods on the River Murray a series of locks and weirs were constructed in the 1920’s and 1930’s for commercial transport. The weirs incorporated a navigable pass to allow vessels to bypass the lock structure during high flows. Today the River Murray is an important navigational waterway for both commercial and recreation vessels, and the weir pools are a vital component of various irrigation industries along the river. Occupational health and safety concerns for the divers required to work in falling floodwaters during reinstatement of the navigable pass, together with concern over the ageing structure anchorages has brought about the project for modification of the navigable pass. The recommended replacement of the existing navigable pass includes the construction of semisubmerged concrete piers with a removable steel bridge section. The navigable pass, used only during flood events, will provide a minimum of 1.9m of water over the submerged piers in accordance with current navigational requirements. Environmental improvements to the weirs such as the introduction of fish passageways are likely to be undertaken simultaneously as part of the weir modifications. This paper presents an overview of the use and operations of the subject weirs, the process undertaken to reach the preferred solution and the final design. *NOTE: At the time of writing, the final design had been completed for lock and weir No’s 7 and 8, however, contracts for construction had not been let.
总页数：	Proceedings of the 30th PIANC-AIPCN Congress. Sydney Australia. 22-26 Sept. 2002. pp11
报告类型：	科技报告