Research on Float Upward Point Values for Tunnel Uplift Hierarchical Control during Shield Tunnel Construction

Abstract:

The adverse effect of tunnel uplifit on tunnel structural stability and waterproof property is increasingly prominent, leading to engineering problems such as segments connection and damage. All these bring the construction quality down and make it difficult for operations and management. Based on the data obtained from monitoring the upllifit of the serrid measure sections in two intervals in Ningbo metro line No. 1, this paper studies the segments uplift by analyzing segment mortise structure features and float upward trajectory. The article considers the worst conditions according to the size difference in mortise, puts forward a method to calculate and integrate the slab staggering and segments opening based on the monitoring data, and then get two float upward point values. Finally, it is proposed that by updating and fitting the monitoring data, the tunnel uplift can be divided into three intervals, making it possible for dynamic and hierarchical control. The research results could provide reference for the shield tunnel construction.

• Periodical: Applied Mechanics and Materials (Volumes 170-173)
• Pages: 1479-1485
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.170-173.1479
• Online since: May 2012
• Authors: Di Wu, Jun Hong Zhou, Shun Hua Zhou
• Keywords: Construction, Control, Point Values, Tunnel Uplift

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