Double-Shield TBM Performance Analysis in Clay Formation: A Case Study in Iran


The Konjancham conveyance tunnel is a part of the tropical water conveyance plan that is designed to transfer water to both Kermanshah and Ilam provinces in Iran. The second part of this tunnel (KT-2) is a 12 kilometers long with a diameter of 5.56 meters that is being bored using a double-shield TBM (DS-TBM) machine. The tunnel is excavated in both Aghajari and Lahbari formations, including claystone, siltstone, and sandstone. In this study, an overview of the basics of the project, including geology, engineering geology, hydrogeology, as well as the characteristics of the tunnel and the TBM, have been reviewed, firstly. Then, the field performance of the TBM is analyzed by focusing on the geological conditions and the functional parameters of the machine such as thrust force and RPM. Finally, the wear of the disc cutters was analyzed as one of the important issues in the boring process.

Meeting Name

World Tunnel Congress, WTC 2019 and the 45th General Assembly of the International Tunnelling and Underground Space Association, ITA-AITES 2019 (2019: May 3-9, Naples, Italy)


Mining Engineering

Keywords and Phrases

Groundwater; Hydrogeology; Office buildings; Tunneling (excavation), Boring process; Clay formation; Double shield TBM; Field performance; Functional parameters; Geological conditions; Performance analysis; Tropical waters, Tunnels

International Standard Book Number (ISBN)


Document Type

Article - Conference proceedings

Document Version


File Type





© 2019 CRC Press/Balkema, All rights reserved.

Publication Date

01 May 2019