乐滩灌区工程红水河渡槽的建设条件和结构型式设计  

Construction conditions and structural design of Hongshui River aqueduct in Letan Reservoir Irrigation Zone

作　　者：胡本勇[1] 郭业水 HU Ben-yong;GUO Ye-shui(Guangxi Water&Power Design Institute Co.,Ltd.,Nanning 530023,China)

机构地区：[1]广西水利电力勘测设计研究院有限责任公司,南宁530023

出　　处：《广西水利水电》2024年第6期48-52,共5页Guangxi Water Resources & Hydropower Engineering

摘　　要：红水河渡槽是桂中治旱乐滩灌区南干渠通水攻坚的关键节点,渡槽受总干渠自流输水的水力特性限制,渠首设计水位较低,渡槽下的航道通航净高要求不小于8 m,建设条件复杂。通过拱架式和连续刚构式两种方案的比较,选择连续刚构式渡槽方案,不仅节约了工程投资,也提高了工程实施的安全可靠性。采用双幅大跨度矮墩扁平叠箱变截面连续刚构型式,将承载结构和过水槽身有效结合,在广西水利工程中尚属首例,是全国首座大跨低墩连续刚构跨河渡槽。Hongshui River aqueduct is the key node of the South trunk canal of Letan Reservoir Irrigation Zone in central Guangxi.The design of the aqueduct is limited by the hydraulic characteristics of artesian water transport in the main canal.The designed water level of the canal head is low.The navigable height below the aqueduct is required to be not less than 8m.For the complicated construction conditions,arch frame scheme was compared with continuous rigid frame scheme,based on which the continuous rigid frame scheme was determined due to less construction cost and higher implementation safety and reliability.The adopted continuous rigid frame has double width,large span,low pier,flat stacked box and variable cross-section.The load-bearing structure is effectively integrated with the water flow tough body.It is the first case of water conservancy engineering in Guangxi,and is the first cross-river aqueduct of large-span continuous rigid frame with low piers in China.

关 键 词：红水河渡槽 连续刚构式渡槽 安全可靠性 乐滩灌区 桂中治旱 

分 类 号：TV672.3[水利工程—水利水电工程]