Open AccessNumerical Researches on the Optimization of Construction Methods in Tunnels with Super Large Section
Author(s) -
Xiaosong Tang,
Yongfu Wang,
Yanyan Li
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/304/3/032024
Subject(s) - section (typography) , structural engineering , arch , displacement (psychology) , finite element method , computer simulation , stability (learning theory) , reduction (mathematics) , engineering , stress (linguistics) , numerical analysis , strength reduction , tunnel construction , computer science , mathematics , simulation , geometry , operating system , psychology , mathematical analysis , linguistics , philosophy , machine learning , psychotherapist
At present, the selection of construction methods in the tunnels with super large sections often relies on the experience for lack of a definite and feasible method. Based on the design method of formation-structure tunnels, the paper adopts FEM strength reduction to conduct numerical researches on the optimization of construction methods in tunnels with super large section. Taking a tunnel with super large section in a subway station as example, the paper first carries out numerical simulation on arch-wall method and double sidewall pilot tunnel method. Then it compares and analyzes the calculation results of surrounding rock displacement, stress on anchors and surrounding rock stability during construction. Finally, the paper suggests double sidewall pilot tunnel method. The analysis on the calculation examples shows that numerical method can quantitatively and directly display the difference between various construction methods and realize the optimization of construction methods in tunnels with super large section.