Research and Application of a Prefabricated Spatial Reticulated Shell Support System for Large Cross-Section Tunnel in a Complex Urban Environment

To solve the technical problems of slow construction progress, low mechanization and high risk shallow buried large cross-section tunnels in a complex urban environment, series spatial reticulated shell (SRS) support structures are developed this paper. Moreover, equipment multifunctional operation trolley is to install SRS arch, technology system prefabricated structure proposed for tunnel. Therefore, deformation characteristics end-plate joint component jointless clarified by laboratory experiments. The mechanics’ simulation arch performed obtain tunnel stress based on project Panyu Square Station Guangzhou Metro. A field application carried out realize mechanized operation. obtained results reveal that has better ductility, its ultimate bearing capacity basically consistent with component. can effectively control surrounding rock, improve state structure, reduce plastic zone shotcrete numerical simulations. overall measurement represents “bigger upside smaller downside” “uneven symmetry”. Additionally, successful provides scientific reference tunnels.