Preliminary communication

https://doi.org/10.17559/TV-20191118080659

Deformation of Pipelines Induced by the Construction of Underlying Twin-Tunnel

Jinlong Zhu ; School of Civil Engineering, Hefei University of Technology, No. 193 Tunxi Road, Hefei, Anhui, 230009, P. R. China
Dayong Zhu ; Zhejiang University Ningbo Institute of Technology, No. 1 Qianhu South Road, Ningbo City, 315100, Zhejiang Province, P. R. China

Abstract

The soil displacement load induced by the metro tunneling is applied to the adjacent pipelines, which leads to the deformation of the pipelines, and affects the safe use of the pipeline. According to the displacement of the soil caused by the excavation of the twin-tunnel, considering the shear deformation of the soil and the angle between the tunnel and the pipeline, the analysis method of the Pasternak foundation beam for the longitudinal displacement of the pipeline caused by tunneling was established. The calculation result was relatively close to that of the numerical simulation based on displacement controlled method (DCM) and the field measured data. The influences of the angle, the distance between tunnel axes, the soil volume loss rate and the relative bending stiffness on the pipeline deformation were analyzed. Finally, the influence of the shearing stiffness of the pipeline was researched based on the Timoshenko beam model.

Keywords

Pasternak foundation; pipeline; shearing stiffness; tunnel

Hrčak ID:

242337

URI

https://hrcak.srce.hr/242337

Publication date:

15.8.2020.

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