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Tunnelling underneath a large diameter water main in Shanghai

Jinyuan Liu, Yujun Wen

In the proceedings of: GEO2011: 64th Canadian Geotechnical Conference, 14th Pan-American Conference on Soil Mechanics and Geotechnical Engineering, 5th Pan-American Conference on Teaching and Learning of Geotechnical Engineering

Session: Buried Structures & Subsurface Systems

ABSTRACT: This paper presents a successful case of tunnelling underneath an existing 3.0 m diameter water main using an earth pressure balance (EPB) tunnel boring machine (TBM) in Shanghai, China. The water main was located 10 m below the ground surface with a clearance of 4.1 m between its invent and two new tunnels. In order to ensure the safety of this water main, a tight tunnelling construction control was implemented by maintaining the face stability and controlling spoil extraction and grouting operation. The construction was divided into four stages with different control measures implemented based on the relative position of the TBM to the water main. The water main was kept operational and safe during underneath tunnelling due to implementation of these measures.

RÉSUMÉ: Ce document présente un cas réussi du perçage d'un tunnel sous une force d'eau existante de diamètre de 3.0 m utilisant une aléseuse de tunnel de l'équilibre de pression de la terre (EPB) (TBM) à Changhaï, Chine. La force d'eau était des 10m localisés au-dessous de la surface au sol avec un dégagement de 4.1 m entre le son inventent et deux nouveaux tunnels. Afin d'assurer la sûreté de cette force d'eau, une commande serrée de construction de perçage d'un tunnel a été mise en application en maintenant la stabilité de visage et en commandant l'extraction de corrompre et en jointoyant l'opération. La construction a été divisée en quatre étapes avec différentes mesures de contrôle mises en application basées sur la position relative du TBM à la force d'eau. La force d'eau a été maintenue opérationnelle et coffre-fort pendant sous le perçage d'un tunnel dû à l'exécution de ces mesures.

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Cite this article:
Jinyuan Liu; Yujun Wen (2011) Tunnelling underneath a large diameter water main in Shanghai in GEO2011. Ottawa, Ontario: Canadian Geotechnical Society.

@article{GEO11Paper216, author = Jinyuan Liu; Yujun Wen ,
title = Tunnelling underneath a large diameter water main in Shanghai,
year = 2011
}