Field Monitoring and Numerical Simulation Study on Mechanical Characteristics of Extra-Long Highway Tunnel

Xun Li; Chuan He; Guo Wen Xu

doi:10.4028/www.scientific.net/AMM.170-173.1450

Paper Titles

Study on the Construction Time of Secondary Lining in Loess Tunnel
p.1427

Research of Three-Exponential Smoothing Method in Tunnel Displacement Prediction
p.1432

Analysis of the Frame Structure’s Force due to Subway Excavation with Different Horizontal Distance
p.1437

Numberical Analysis in the Deformation of Adjacent Buildings and Underground Pile Caused by Tunnel Shield Construction
p.1444

Field Monitoring and Numerical Simulation Study on Mechanical Characteristics of Extra-Long Highway Tunnel
p.1450

Study on the Effects of Air Temperature Distribution by Flow State inside Cold Region Tunnel
p.1455

Study on Sub-Level Classification Method of Road Tunnel Surrounding Rock According to the Hierarchical Cluster Analysis
p.1463

An Effective Method of Evaluating Safety of Adjacent Buildings Influenced by Metro Construction in Beijing
p.1467

Three Dimensional Elastic-Plastic Numerical Simulation of Tunnel Excavation Sequence of Dalian Speed Railway
p.1474

HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 170-173Field Monitoring and Numerical Simulation Study on...

Field Monitoring and Numerical Simulation Study on Mechanical Characteristics of Extra-Long Highway Tunnel

Abstract:

Taking Motianling tunnel in Chongqing as an engineering background, the monitoring and measurement scheme is proposed for the extra-long tunnel under complex condition, and the field data and the numerical simulation results is analyzed. The results indicates that, the selected cross-section reflect overall state of the Motianling tunnel, and the structure safety monitoring during operation is considered; by tunnel internal and external observation, it is found that the tunnel face in F22 fault zone may not stay stability, because the monitoring information receive feedback timely, and the supporting measures is proper, the surrounding rock stay stability when excavating; for the typical section, the surrounding rock contact pressure is greater than interlayer pressure, primary lining sustains most of the load ,and the secondary lining plays an assistant role as safety reservation; the maximum of anchor axial force and surrounding rock pressure occur at tunnel crown. By monitoring and numerical simulation, the dynamic excavation and design is realized, the Motianling tunnel is achieved safely and successfully at last.