Study of the spacing of anti-slip piles on the force characteristics of tunnels under landslide loading

Tao Li; Gang Chen

doi:10.1117/12.2689709

7 September 2023 Study of the spacing of anti-slip piles on the force characteristics of tunnels under landslide loading

Tao Li, Gang Chen

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Proceedings Volume 12790, Eighth International Conference on Electromechanical Control Technology and Transportation (ICECTT 2023); 127903W (2023) https://doi.org/10.1117/12.2689709
Event: 8th International Conference on Electromechanical Control Technology and Transportation (ICECTT 2023), 2023, Hangzhou, China

Abstract

This article investigates the stress distribution characteristics of piles and tunnel lining structures in a tunnel-landslide system under the working conditions of anti-slip pile treatment with three different pile spacing distances. The study compares and analyzes the regular changes in the displacement of the pile top, tunnel, bending moment of the pile body, and tunnel under landslide loads with different pile spacing distances. The numerical simulation results show that when the pile spacing distance increases from the initial 5cm to 10cm and 15cm, i.e., from 2.08d to 4.16d and 6.24d, respectively, the horizontal displacement of the pile top, tunnel, and the bending moment of the pile body and tunnel gradually increase under the same load. However, the increase in displacement and bending moment is much greater when the pile spacing distance increases from 4.16d to 6.24d than when it increases from 2.04d to 4.16d. The results indicate that, for practical engineering and economic considerations, if the landslide thrust is relatively small, the pile spacing distance can be increased to 6.24d, or even larger depending on the actual situation, with some limitations. However, if a large landslide thrust is encountered, the pile spacing distance should be reduced to 2.08d or even smaller. This is beneficial for protecting the tunnel lining structure under landslide loads. Nevertheless, regardless of whether the landslide thrust is large or small, a pile spacing distance of 4.16d is a relatively cost-effective choice for protecting the tunnel when implementing anti-slip pile treatment.

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Tao Li and Gang Chen "Study of the spacing of anti-slip piles on the force characteristics of tunnels under landslide loading", Proc. SPIE 12790, Eighth International Conference on Electromechanical Control Technology and Transportation (ICECTT 2023), 127903W (7 September 2023); https://doi.org/10.1117/12.2689709

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KEYWORDS

Deformation

Numerical simulations

Engineering

Clouds

Design and modelling

Frequency shift keying

Analytical research

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