Numerical Optimization on the Selection of Excavation Methods for Deep  Tunnels in High Stress Field and its Engineering Application

doi:10.3973/j.issn.1672-741X.2013.09.006

Tunnel Construction ›› 2013, Vol. 33 ›› Issue (9): 735-740.DOI: 10.3973/j.issn.1672-741X.2013.09.006

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Numerical Optimization on the Selection of Excavation Methods for Deep Tunnels in High Stress Field and its Engineering Application

YANG Yanliang¹, LI Xibo², MAO Honglu³

(1. The 3rd Engineering Department of General Highway Engineering Company of Liaocheng, Liaocheng 252000,  Shandong, China; 2. Shandong Provincial Communications Planning and Design Institute, Jinan 250031,  Shandong, China; 3. School of Civil Engineering, Shandong University, Jinan 250061, Shandong, China)

Received:2013-04-26 Revised:2013-06-09 Online:2013-09-18 Published:2013-09-18

Abstract

Abstract:

To avoid rock falls and distortion of support structure occurring in the construction of tunnels in high stress field, the designers had plans to use either stage excavation or pilot heading excavation method for the tunnel. Full face excavation method, pilot heading excavation method and stage excavation method were simulated by the finite difference software FLAC3D. After analyzing and comparing the features of the distribution of the deformation field, plasticized deformation field and stress field, the stage excavation method was proposed for the tunnel based on the data produced. After adopting the said method, the stability of the excavation face was improved dramatically and the data collected at the site coincide well with the numerical simulation results.

Key words: deep tunnel, high stress field, tunnel excavation method, numerical simulation

YANG Yanliang, LI Xibo, MAO Honglu. Numerical Optimization on the Selection of Excavation Methods for Deep Tunnels in High Stress Field and its Engineering Application[J]. Tunnel Construction, 2013, 33(9): 735-740.

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Numerical Optimization on the Selection of Excavation Methods for Deep Tunnels in High Stress Field and its Engineering Application

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