Peck Formula Modification of and Engineering Application in Small Radius Curve Shield Tunneling Construction
Journal Title: Urban Mass Transit - Year 2024, Vol 27, Issue 4
Abstract
Objective In the urban rail transit line planning, curved tunnels, and even small radius curved tunnels are often chosen due to influencing factors such as building foundations, underground pipelines, and weak soil layers. Compared to straight tunnels, the shield tunneling construction in small radius curved tunnels increases uncontrolled land subsidence risk. Therefore, it is necessary to study land subsidence control in shield tunneling construction on small radius curved tunnels. Method By calculating the over-excavation gap during curved tunnel shield tunneling construction, the over-excavation quantity for each ring within the curved section is derived. Furthermore, the relationship between tunnel radius and formation loss rate is obtained by introducing formation loss rate. Based on the applicability statistical analysis of existing Peck formula, a modified Peck formula suitable for shield tunneling construction in small radius curved tunnels is derived considering the base formation loss rate, total formation loss rate, additional formation loss rate due to over-excavation, and the calculation of settlement volume slices. Using an engineering of a metro line in Taiyuan as research background, the results of the modified Peck formula calculation are compared with the on-site monitoring data to validate its applicability. Result & Conclusion The verification results from the case study demonstrate that the modified Peck formula is applicable for shield tunneling construction on small radius curved tunnels.
Authors and Affiliations
Linghang YANG
Keywords
Related Articles
- EP ID EP734154
- DOI 10.16037/j.1007-869x.2024.04.008
- Views 8
- Downloads 0
Research on Intelligent Identification of Worker′s Unsafe Behavior in Urban Rail Transit Based on Convolutional Neural Network Algorithm
[Objective] Worker′s unsafe behavior is the fundamental factor in urban rail transit construction accidents. As the traditional management mode is insufficient in restraining the workers from the unsafe behavior, it is n...
Study on Mechanical Performance of Tunnel Interface between 3D Printed Lining and Surrounding Rock
[Objective] Research on and application of 3D printing technology in engineering structure construction are gradually deepening. Applying 3D printing in tunnel construction creates a new idea and approach. In the process...
Research on Urban Rail Transit Service Quality Evaluation Based on Passenger Demand
Objective Evaluation of urban rail transit service quality based on passenger demand not only promotes service quality improvement and enhances passenger satisfaction with travel, but also contributes to economic and soc...
Analysis and Countermeasures for EMU Traction Motor Stator Insulation Faults
[Objective] To ensure the reliability of the stator insulation in EMU (electric multiple unit) traction motors during stator manufacturing or maintenance, it is necessary to conduct tests such as ground insulation withst...
Smoke Exhaust Schemes for Metro Terminal Station Storage Tracks and Reserved Main Lines
[Objective] The smoke exhaust paths for metro terminal station storage tracks and reserved main lines are different from those for various auxiliary lines in middle stations, thus it is necessary to study suitable smoke...