Optimization of heavy haul railway tunnel lining based on ultimate bearing capacity

• Autorzy: Han Wei , Xiao Taoli , Shi Duanwen , Wang Yupeng

Identyfikatory

DOI

10.24425/ace.2022.143051

• Języki publikacji: EN

Abstrakty

EN

The optimization process of design parameters for composite lining of heavy haul railway tunnel is a key problem to be solved in tunnel engineering design. In order to put forward a better design scheme of composite lining for heavy haul railway tunnel, combined with field measurement and numerical simulation, the optimal working condition design is carried out by changing the thickness of shotcrete layer, the type of grid steel frame and the thickness of secondary lining. The influence of the above design parameters on the stress state of the composite lining is analyzed to obtain the optimal design parameters. Finally, the safety performance of the optimized lining is evaluated by the ultimate bearing capacity curve of the secondary lining section. The research shows that: 1) The optimal design parameters of the composite lining of the tunnel are the thickness of the shotcrete layer of 25 cm, the type of the grid steel frame of H180, the thickness of the secondary lining arch waist and the side wall of 40 cm and 35 cm respectively; 2) Different from the single-track heavy haul railway tunnel, the displacement value of the vault settlement of the double-track heavy haul railway tunnel is significantly greater than that of the inner convergence. Increasing the thickness of the shotcrete layer and changing the type of the grid steel frame have better effects on reducing the vault settlement, and have little effect on the inner convergence.

Słowa kluczowe

EN

safety factor; bending resistance; safety; tunnel lining; railway tunnel; heavy haul railway; structure; tunnel engineering; optimization; ultimate bearing capacity

PL

współczynnik bezpieczeństwa; odporność na zginanie; bezpieczeństwo; obudowa tunelu; tunel kolejowy; koleje towarowe; konstrukcja; inżynieria tunelowa; optymalizacja; nośność graniczna

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2022
• Tom: Vol. 68, nr 4
• Strony: 493--511
• Opis fizyczny: Bibliogr. 18 poz., il., tab.

Twórcy

autor

Han Wei

• Fujian Forestry Vocational and Technical College, Department of Traffic Engineering, Nanping, China

• https://orcid.org/0000-0002-2944-8525

autor

Xiao Taoli

• Yangtze University, School of Urban Construction, Jingzhou, China

• https://orcid.org/0000-0001-6796-8268

autor

Shi Duanwen

• China Railway Fourth Survey and Design Institute Group Co. Ltd., Wuhan, China

• https://orcid.org/0000-0002-3874-1838

autor

Wang Yupeng

• Fujian Forestry Vocational and Technical College, Department of Traffic Engineering, Nanping, China

• https://orcid.org/0000-0002-4859-1386

Bibliografia

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