黔中水利枢纽高大跨渡槽的关键技术问题及对策

Key technical problems of high and large span aqueduct for Qianzhong Water Control Project and countermeasures

黔中水利枢纽输水总干渠线路穿越诸多峡谷及河流,需建设较多的高、大跨渡槽。这些渡槽结构型式多样,建设难度大。本文对其代表性结构型式进行了详细介绍,并针对其各自特点,提出了不同结构型式渡槽在结构设计和施工中需解决的关键技术问题。由于目前缺乏专门的行业设计及施工技术标准对重要技术进行控制,故提出了应采取的必要对策,从而为渡槽的顺利建设和良性运行提供重要保证。

The main water conveyance channel of Qianzhong Water Control Project passes through many canyons and rivers, thus many high and large span aqueducts are necessary to be constructed. The types of those aqueducts are various with great difficul- ties for the constructions. The typical structural types of them are described in detail herein, and then the key technical problems necessary to be solved during the structural designs and the constructions of the different structural types of them are presented in accordance with their own characteristics. Because of lack of the professional technical standards for the design and construction, the countermeasures necessary to be adopted are proposed, so as to provide important guarantees for the smooth constructions and better operations of the aqueducts.