Parameter Determination Method in Analysis of Stratum Deformation Caused by Tunnel Excavation

Author:

Li Xinlong1,Zhao Shiyong1,Cao Dongjiao1,Zhao Jiale2ORCID,Liu Yang2ORCID,Hu Zhenhui2

Affiliation:

1. Urban Rail Transit Engineering Limited Company of China Railway 15th Bureau, Yangzhou 225000, China

2. School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China

Abstract

Based on the analytical method of formation deformation caused by tunnel excavation proposed by Verruijt and Sagaseta, combined with the basic principles of soil mechanics and elastic mechanics, a method for determining the pending parameters required in the analysis process is proposed. This method does not require the actual measurement of deformation values in the field, and the required parameters can be determined from geological data, so as to obtain the deformation values of any points of the whole stratum. According to engineering examples, when the pending parameters are obtained by this method, the difference between the resolved value of maximum surface settlement and the measured value can be controlled within 5.0%, and the analytical results can splendidly reflect the formation deformation law caused by tunnel excavation. Further combined with the analysis of the numerical simulation results, the proposed approximation method has certain shortcomings and deficiencies, mainly in the lack of lateral constraints on the displacement. When the measured data in the field are insufficient, this method can be used to estimate the deformation, and the analysis results are slightly larger than the measured values, which is safer.

Funder

Beijing Municipal Natural Science Foundation

Publisher

Hindawi Limited

Subject

Civil and Structural Engineering

Reference23 articles.

1. Deep excavations and tunneling in soft ground;R. B. Peck

2. Settlement development caused by tunneling in soil;P. B. Attewell;Ground Engineering,1986

3. Settlements above tunnels in the United Kingdom—their magnitude and prediction;M. P. O’Reilly

4. A prediction method of ground volume loss variation with depth induced by tunnel excavation

5. Formula for predicting ground settlement induced by tunnelling based on Gaussian function

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