Study on the measures of tunnels side-crossing bridge based on sheltering effects of isolation piles

2nd International Conference on Materials Science, Energy Technology and Environmental Engineering

材料科学;能源学;生态环境科学

Tang, Jian^1 ; Liu, Jun Yan^1,2 ; Liu, Yan^1,2

School of Civil Engineering and Architecture, University of Jinan, Jinan

250022, China^1

Eng. Technol. Res. Ctr. for Urban Underground Eng. Supporting and Risk Monitoring of Shandong Prov., China^2

关键词: Calculation results;    Environment factors;    Pile-settlement;    Settlement deformation;    Sheltering effect;    Simulated results;    Surface subsidence;    Three dimensional finite elements;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/81/1/012156/pdf
DOI  :  10.1088/1755-1315/81/1/012156

来源: IOP

【 摘 要 】

Based on the transit line 3, we studied the effect of the bridge piles crossed closely from the side by the shield tunnel. Using the three-dimensional finite element numerical analysis software Midas GTS/NX, we analyzed the effect of shield tunnel on pile deformation, statistics are obtained that under the condition of pile, subgrade reinforcement and ground changes. The calculation results show that in the condition of reinforcement, the new tunnel shield crossing through the pile caused longitudinal disturbance of the tunnel surrounding strata along the tunnel, where the soil over the area is within a certain range of pile and settlement deformation of surface subsidence occurs, changing the surface roughly to the shape of "V". The maximum value appears above the shield tunnel and the value is high. In combination with engineering geology, hydrogeology and environment factors, this paper adopted isolation pile reinforcement to the pile, and the simulated results show that, pile settlement was significantly reduced under the condition of pile reinforcement. The calculation results show the rationality of the reinforcement scheme to a certain extent, which provides a theoretical basis for the similar tunnel.