Key technologies for type-selection and configuration of super-large-diameter TBM clusters in the Water Diversion Project from the Yangtze River to the Hanjiang River
SONG Zhizhong
LI Heng
SHAO Xiaokang
NIU Yunhua
ZHU Xuexian
LI Yashi
Abstract：The Water Diversion Project from the Yangtze River to the Hanjiang River is an important component of China's national water network construction.It includes the country's longest single tunnel with the largest diameter and the highest overall technical difficulty among pressurized water-conveyance tunnels under construction.For the first time,a cluster of super-large-diameter tunnel boring machines(TBMs)has been applied in the project,breaking through the technical limitations of TBM type-selection and configuration for hydraulic tunnels in China.In the TBM cluster type-selection study of the project's water-conveyance tunnel,quantitative selection methods were applied,including threshold analysis of adverse geological conditions and fuzzy comprehensive evaluation of TBM adaptability to deep composite strata.Based on a comprehensive evaluation of geological and structural adaptability,safety,economy and schedule reliability,a cluster scheme comprising 4 open-type,3 single-shield,2 double-shield and 1 dual-mode TBMs was proposed.Meanwhile,several innovative technical systems were configured,including the open-type TBM steel segment erection system,the normal prestressed anchoring drill rig,the double-shield TBM anchor-mesh-shotcrete support system,the advanced geological prediction system,the multifunctional forward-probing drill system,and the intelligent TBM cluster management and control platform.This approach establishes a new model for the type-selection and targeted configuration of super-large-diameter TBM clusters in deep-buried,long-distance tunnels under complex geological conditions.
Keywords：Water Diversion Project from the Yangtze River to the Hanjiang Riverdeep-buried long-distance tunnelhydraulic tunnelsuper-large-diameter TBMTBM clusterTBM type-selection and configurationadaptability evaluation
Publication Date：2025-11-12
Online Publishing Date：2025-11-28(First online date of this platform, not the publication date of the document)
Pages：8( 65-72 )