Analysis on Effect of Tunnel Crossing Underneath Foundation of Tall Buildings on Anti-Seismic Mortar Anchor in Weathered Rock Area

Abstract:

Depending on a project of constructing a tunnel of high-speed railway which crosses underneath the foundation of tall buildings in weathered rock area, the paper analyzes the failure process and its law of anti-seismic mortar anchors under the foundation of tall buildings by simulating the whole process of construction with finite element model. Then the coverage scope, influence rules and extent of tunnel excavation on the anti-pulling effect and stability of mortar anchors are analyzed according to the changes of lateral pressure and axial force of anti-seismic mortar anchors before and after construction. The results show that the influence area can be divided into three parts， of which the main area where the anti-seismic mortar anchors are badly affected is on the top of the tunnel and extends horizontally to a certain range. Finally, the paper gives an applicable method to estimate the area where the anti-seismic mortar anchors should be strengthened by grouting, which also applies to the similar projects in weathered rock area.

• Periodical: Advanced Materials Research (Volumes 446-449)
• Pages: 2581-2589
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.446-449.2581
• Online since: January 2012
• Authors: Xiao Bei Shi, Kai Wei, Bing Long Wang, Da Wei Huang
• Keywords: Anti-Seismic Mortar Anchor, Grouting Reinforcement, Tunnel Crossing Underneath Buildings, Tunnel Excavation, Weathered Rock

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