Abstract
The interaction between two shield tunnels and the integrated pipe corridor is complicated and still lacks understanding. This paper investigated the influence of the double-track subway construction on the deformation characteristics of the existing comprehensive pipe corridor based on numerical simulation on a case history in Xi’an, China. First, loess is a special kind of clayed soil. In the theoretical calculation of overburden earth pressure of shield tunnel, the loose earth pressure theory under the incomplete soil arching effect can be used for calculation when considering the soil arching effect. Then, in the loess area of Xi’an, the existing comprehensive pipe corridor is affected by the construction disturbance. The vertical displacement of the existing pipe corridor utility tunnel affected by different support pressures which considers the soil arch effect or not was extracted from the FEM. The results indicated that, in the case where the left and right lines are constructed at different times, the vertical displacement of the pipe gallery is affected by different support pressures. If the support pressure is small, the settlement will be large, and the uplift will be diminutive. According to the construction methods and supporting pressures of this article, shield tunnel construction will not damage the safety of the comprehensive pipe corridor.
Highlights
In urban areas, a utility tunnel is a kind of underground structure to transport water, sewage, oil, natural gas, and other materials
Based on the Xi’an subway shield tunnel passing through the existing comprehensive pipe corridor, this article will establish a numerical model to simulate the construction process of the subway shield tunnel passing through the existing comprehensive pipe corridor. e construction method of “line re-excavation” analyzes the influence of the shield tunneling on the deformation of the existing comprehensive pipe corridor under the conditions of considering the soil arch effect and the supporting pressure without considering the soil arch effect
(3) When the ground loss ratio is less than 0.65%, the theory of loose earth pressure under the incomplete soil arching effect considering cohesion is larger than the Terzaghi earth pressure due to the less principal stress deflection angle
Summary
A utility tunnel is a kind of underground structure to transport water, sewage, oil, natural gas, and other materials. The numerical simulation of the influence of shield tunnel three-dimensional dynamic construction process on the comprehensive pipe gallery is relatively rare. Advances in Civil Engineering incorporating the tensionless Pasternak model, which takes full account of the gap formation and the pipeline orientation, have been formulated to estimate the response of the pipeline and the overlying ground Since all these previous studies reduced the interaction of the tunnel and the pipeline to a two-dimensional problem, these three problems cannot be determined. E construction method of “line re-excavation” analyzes the influence of the shield tunneling on the deformation of the existing comprehensive pipe corridor under the conditions of considering the soil arch effect and the supporting pressure without considering the soil arch effect Based on the Xi’an subway shield tunnel passing through the existing comprehensive pipe corridor, this article will establish a numerical model to simulate the construction process of the subway shield tunnel passing through the existing comprehensive pipe corridor. e construction method of “line re-excavation” analyzes the influence of the shield tunneling on the deformation of the existing comprehensive pipe corridor under the conditions of considering the soil arch effect and the supporting pressure without considering the soil arch effect
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
