Abstract
Three-dimensional finite element method analysis on the tunnel-soil-underground pipeline was carried out based on the ABAQUS program. PSI element was applied to simulate the interaction between the pipelines and soil. Parameters such as an elastic modulus of soil, stress release rate, at-rest lateral pressure coefficients, an elastic modulus of pipelines, and buried depths of tunnels were analyzed. The effects of tunnel excavation on the displacement of existing pipelines were investigated, and the settlement relationships were obtained. The relationship between each parameter and surface settlement was determined by the grey relational analysis method to analyze each parameter’s sensitivity to the settlement of the pipeline, which can provide a reference for emphasis and methods of shield tunneling support. Finally, a formula of the settlement relationship between the maximum surface settlement and pipelines deformation was proposed for different pipe-soil relative stiffness. The formula was applied in the practical case. Compared with the field monitoring results and FEM computer results, it has been found that the proposed normalized formula is consistent with the measured results and numerical simulation of the pipeline settlement.
Highlights
It is still inevitable to disturb the surrounding soil and affect the deformation of the soil during the construction process
Tunneling-induced ground movements cause pipeline deformation that may disrupt the conveyance of essential services and resources and threaten the safety and security of urban inhabitants. e interaction between underground utility pipelines and the surrounding soil has attracted growing research attention recently; there has been substantial work performed on the impact of tunneling construction on the adjacent underground pipelines [1,2,3]
Rough the application of ABAQUS program, a threedimensional finite element model of the tunnel-soilunderground pipeline was developed in this study to research the laws governing pipeline settlement under different influencing factors and the sensitivity of different influencing factor to pipeline settlement. e results of this research gave a relationship graph of the pipeline settlement Sp and the maximum sedimentation Smax under different pipe stiffness
Summary
It is still inevitable to disturb the surrounding soil and affect the deformation of the soil during the construction process. Many constitutive models are available nowadays to predict soil-structure interaction problems. Advances in Civil Engineering construction on the adjacent parallel underground and to simulate the dynamic response of pipeline during tunnel construction, by using the three-dimensional finite element method [5]. E purpose of the paper is to supply a practical tool for civil engineers so that they can evaluate the behaviors of pipelines induced by tunneling. Based on our work described in this paper, engineers would be able to predict the settlement of the pipeline with the fundamental parameters of soil, tunneling, and pipes. Engineers would be able to predict the settlement of the pipeline with the fundamental parameters of soil, tunneling, and pipes. Nomograms for relatively simple structures, such as buried pipelines [7, 8] or beam, like structures can be used for a first estimation of the effects of tunneling [9]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
