Abstract
Deformation of Pipelines Induced by the Construction of Underlying Twin-Tunnel
Highlights
During the construction of urban subway, the tunnels crossing pipeline is normally inevitable
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
Summary
During the construction of urban subway, the tunnels crossing pipeline is normally inevitable. Attewell and other researchers [1] first analyzed the influence of tunnel excavation on the longitudinal deformation of the upper pipeline by using the two-stage method based on the Winkler elastic foundation beam model. This paper considered the shearing stiffness of the foundation and the angle of the tunnel and pipeline, and established Pasternak foundation beam analysis method targeting at the pipeline longitudinal displacement caused by tunnel excavation, and compared the calculation results with DCM numerical simulation and field measurement based on a case, and analysed the influence of the angle, the tunnel axes distance, soil loss rate, relative bending stiffness on the pipeline deformation, and the Tehnički vjesnik 27, 4(2020), 1311-1315 influence of pipeline shearing stiffness based on Timoshenko beam model was taken into account
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