Mechanical Characteristics of Variable Cross-Section Immersed Tunnels under Spatial Differential Settlement
نویسندگان
چکیده
This work establishes a fine model reflecting the characteristics of immersed tube structures to study spatial mechanical variable cross section tunnels. Then, behavior pipe segments under differential deformation is explored, based on which we propose formula for estimating shear key force and analyze corresponding failure mechanism mode. Thus, critical points segment design are specified. The results show that, first, bears more sectional internal (over 47%) than uniform in actual cases, should be fully considered practical reinforcement design. Bearing alternatively occurs at different keys, implying an apparent stiffness matching problem. Second, overall settlement longitudinal bending, failing satisfy assumption deformed plane sections. keys varies with quadratic function bending degree, dislocation magnitude has positive near-linear relationship degree. Third, when subjected torsion, weak sidewalls sheared resist torsion. this laterally transferred top bottom plates jointly shared by adjacent explaining why adjusted structural deformation. Fourth, action deformation, mainly undertaken vertical keys. When structure compression occur end angle middle wall key, its root junction experiences tension failure. local soft subgrade side cause joint Finally, bearing characteristics, mechanism, mode tunnels, idea strengthening put forward, can guide similar engineers.
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ژورنال
عنوان ژورنال: Advances in Civil Engineering
سال: 2022
ISSN: ['1687-8086', '1687-8094']
DOI: https://doi.org/10.1155/2022/8357463