国家重大水利工程重庆市藻渡水库工程全线首条输水隧洞贯通

Core Insights - The completion of the Duoduo Stone Tunnel marks a significant milestone in the construction of the Zhaodu Reservoir project in Chongqing, which is part of China's major water conservancy initiatives [1][2] - The Zhaodu Reservoir, with a total storage capacity of 201 million cubic meters, aims to enhance flood control, irrigation capacity, and ecological protection in the region [2] Project Overview - The Zhaodu Reservoir project is classified as a Class II large-scale water conservancy project and is one of the 172 key water-saving supply projects in the country [1] - The project is being implemented by a consortium consisting of China Communications Construction Company (CCCC) and Yangtze Design Group [1] - The reservoir's dam has a normal water level of 375 meters and includes a water conveyance system approximately 94 kilometers long, covering multiple districts in Chongqing [1] Construction Details - The Duoduo Stone Tunnel, which is 4,098 meters long, has successfully connected upstream and downstream water systems, playing a crucial role in the water conveyance project [1] - The construction faced challenges such as complex geological conditions and ventilation difficulties, which were addressed through advanced geological forecasting and specialized design for ventilation and drainage [1][2] - The project team implemented a "short advance, weak blasting, and frequent support" strategy to ensure safety and efficiency, completing the tunnel in 475 days, six months ahead of schedule [2] Regional Impact - Upon completion, the Zhaodu Reservoir will serve as a flood control barrier for the Qijiang urban area and surrounding towns, significantly improving regional water supply and irrigation capabilities [2] - The project is expected to contribute to the ecological protection and power generation, enhancing the overall water network layout in Chongqing and supporting the Chengdu-Chongqing economic circle [2]