Influence of Strata Pre-Reinforcement on the Tunnel and the Surrounding Strata while Shield Tunnel Crosses Beneath Intercity High-Speed Rail

Abstract:

In view of that the construction period of shield crossing beneath high-speed rail is apt to cause soil deformation and large differential settlement of ballastless track plate and of the long-term implications on the tunnel structure of the train cycle dynamic load in operating period, with the project of shield crossing intercity in Suzhou as example, the paper determines pre-reinforcement method before crossing project, applies numerical simulation to analyze the influence of pre-reinforcement on the tunnel itself and surrounding strata, then derives the rule of pre-reinforcement on reducing soil deformation and tunnel internal force. The research gives that grouting in main and secondary reinforcement area will apparently reduce settlement deformation , jet grouting pile controls surface deformation well and soil pre-reinforcement will reduce a lot of shield tunnel segment internal force caused by high-speed rail operation.

• Periodical: Applied Mechanics and Materials (Volumes 303-306)
• Pages: 2859-2865
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.303-306.2859
• Online since: February 2013
• Authors: Yong Gang Xu, Chang Ji, Shun Hua Zhou, Huan Le Zhu
• Keywords: Intercity Railway, Shield Tunnel, Strata Deformation, Strata Pre-Reinforcement, Tunnel Internal Stress

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