Author(s)

Jian Duan, Dongqiang Chen, Yexing Zhang, Chengquan Wang and Boyan Ping

Corresponding Author

Dongqiang Chen

ABSTRACT

In order to improve the prefabricated assembly degree of cable conduit, make up for the shortcomings and deficiencies of cast-in-place cable conduit, and realize the standardization, industrialization and modular production of cable conduit, the mechanical performance of a new type of prefabricated cable conduit (PCC) is investigated numerically in this study. Finite element simulations are employed to decipher more details on the compressive behaviour of numerous archetypes with different thickness of covering soil and wheel loads. The results show that the stress and deformation of prefabricated cable conduit can meet the requirements under the design load, the vertical displacement and tensile stress of steel bars are significantly affected by the location of wheel load and the thickness of overburden. The conduit wall is the control component of the main compressive stress, and the top plate is the control component of tensile stress. The results show that the vertical displacement of the top plate and the tensile stress of the bottom plate are 4.2 times and 4.0 times of the corresponding values when the thickness of the covering soil is 2 m. Under the action of wheel pressure, the tensile stress at the bottom of the roof concrete decreases at first and then increases with the increase of the covering soil thickness.

KEYWORDS

Prefabricated structure, cable conduit, wheel load, covering soil thickness, finite element method