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Displacements around Two Closely Adjacent Circular Openings

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Abstract:

Deformations of the tunnels may results in settlements of the ground surface. Based on the characters of deformation of twin closely adjacent tunnels excavated, a basic deformation mechanism of two parallel tunnels constructed close together was present, which is not uniform but oval-shaped ground deformation pattern and represent the ground loss occurred during construction of the tunnels. An improved convergence model of the tunnel boundary for twin closely adjacent tunnels and the related expressions are proposed. Using a computer package FLAC2D, the certain given deformations as the boundary condition were applied to the boundaries of two tunnels, and the surface settlements caused by the excavation of two tunnels were obtained. It is found that the results match well with the measured field results.

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Periodical:

Applied Mechanics and Materials (Volumes 170-173)

Pages:

1397-1401

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.170-173.1397

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Online since:

May 2012

Authors:

Li Yan, Jun Sheng Yang

Keywords:

Convergent Model, Displacement Loading, Twin Closely Adjacent Tunnels

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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