Optimization of PBA Method Station Arch Support Scheme

Journal Title: Urban Mass Transit - Year 2024, Vol 27, Issue 12

Abstract

[Objective] In PBA (pile-beam-arch) method construction, the choice of different arch support schemes significantly impacts the structural mechanics. To ensure the reliability and safety of urban underground structures, it is essential to rigorously monitor the land subsidence. Thus, it is necessary to systematically study the impact law of various arch support schemes on supporting structures and ground deformation. [Method] Based on Tianhe East Station project on Guangzhou Metro Line 11 and using MIDAS/GTS software, a three-dimensional finite element model is constructed to analyze the land subsidence characteristics and the arch initial support internal force distribution law of various arch support schemes in depth. Meanwhile, field monitoring data of land subsidence is also used to validate the numerical simulation results. [Result & Conclusion] The calculation results of initial support arches reveal that, compared to the CD (center diaphragm) method, the stepped method results in increases of 6.80% in land subsidence, 9.74% in initial support bending moment, and 14.62% in axial force, all meeting the construction control requirements. Research results of secondary lining arch support show that the alternating support removal method significantly reduces land subsidence with a smaller impact on arch initial support internal forces compared to the sequential support removal method. The scheme of combining CD method for initial arch support with alternating support removal method for secondary lining arch support proves to be advantageous.

Authors and Affiliations

Xingkai PEI, Biao HUANG, Yongxing DAI, Wei CHEN, Yujie YANG, Huijian ZHANG

Keywords

Related Articles

Mapping Law of CRTS Ⅱ Type Slab Ballastless Track Static Deformation Due to Subgrade Horizontal Deformation

Objective Aiming at the insufficient control indexes for high-speed railway subgrade horizontal deformation currently, it is necessary to study the influence law and limit values of ballastless track subgrade horizontal...

Study on Stability of Small Clearance Shield Tunnel Excavation Face

[Objective] Determine the limit support pressure required to maintain tunnel face stability during the construction of double-line small clearance shield tunnel. [Method] The excavation stability of double-line small...

Structural Force Monitoring and Calculation of the Metro Shield Tunnel in Subsea Weathered Slot

Objective In order to explore the load distribution characteristics of shield tunnel structures in subsea weathered slot, a study on the internal force response law of the segment structures is carried out. Method Relyin...

Research on Engineering Acceptance Measures and Safety Evaluation Schemes of City Railway New Projects in Shanghai

Objective Several projects of city railway in Shanghai are currently under construction. However, there are no well-defined engineering acceptance and safety evaluation management measures for new city railway projects a...

Multi-objective Optimization of Combined Gray-green Infrastructure Rainwater System for Yuhuazhai Depot of Xi’an Metro

[Objective] Acceleration of the urbanization process and frequent occurrence of urban flood disasters impose higher requirements on the rainwater system of urban rail transit depots. It is necessary to conduct a detail...

Download PDF file
  • EP ID EP752734
  • DOI 10.16037/j.1007-869x.2024.12.029
  • Views 22
  • Downloads 0

How To Cite

Xingkai PEI, Biao HUANG, Yongxing DAI, Wei CHEN, Yujie YANG, Huijian ZHANG (2024). Optimization of PBA Method Station Arch Support Scheme. Urban Mass Transit, 27(12), -. https://europub.co.uk/articles/-A-752734