地下输水管线这样穿山遁地（工匠绝活·我在重大工程一线）

Core Points - The Jianghan Water Diversion Project is one of the most challenging water diversion projects in China, featuring the longest single tunnel length and the largest diameter among ongoing projects [5][12] - The project aims to connect the Yangtze River and Han River, enhancing water resource allocation and increasing the average annual water diversion capacity from 9.5 billion cubic meters to 11.51 billion cubic meters [5][12] Group 1: Project Overview - The Jianghan Water Diversion Project has a total length of 194.7 kilometers, with the main tunnel already exceeding 7.5 kilometers and the branch tunnels over 24.1 kilometers as of June 16 [5] - The project involves over 20 units and more than 3,000 construction personnel working together to tackle complex geological challenges [5][6] Group 2: Geological Challenges and Solutions - The project faces multiple geological challenges, including high ground stress, rock bursts, and water inflow, necessitating advanced geological forecasting techniques [6][7] - The maximum depth of the tunnel reaches 1,230 meters, with 36.4% of the sections exceeding 600 meters in depth [6] Group 3: Construction Techniques - The project employs a combination of drilling and blasting methods alongside Tunnel Boring Machines (TBM) for efficient excavation [9] - The TBM "Jianghan Pioneer" has a diameter of 12.23 meters and is designed to perform excavation, spoil removal, and lining installation simultaneously [8][9] Group 4: Innovations in Construction - Innovations in concrete pouring techniques have been implemented to enhance the structural stability of the project, including the use of large steel templates and a three-step smoothing process [10][11] - The project utilizes advanced monitoring systems for TBMs to ensure real-time data collection and problem detection during excavation [8]