A pipe pile top friction-shear type energy dissipation connection device and its construction method

Abstract

The invention discloses a pipe pile top friction-shearing type energy consumption connecting device and a construction method thereof. The device comprises an outer-layer steel cylinder, a center steel cylinder, a flexible steel pipe, an upper sealing plate, a lower sealing plate and a bottom sleeve; the flexible steel pipe penetrates through the center steel cylinder and extends into a pipe pile; a gap is filled with a glass ball and graphite mixture; an annular disc spring is arranged between the upper sealing plate and the lower sealing plate; a friction energy consumption pair and a limit retaining ring are arranged between the lower sealing plate and the top of the bottom sleeve; a connecting device is poured in a bottom groove of a bearing platform; the bottom sleeve is hooped on a pipe pile expansion head. Under an earthquake action, the shear deformation of the flexible steel pipe is caused, and meanwhile, a friction plate generates relative slippage, so that a pile top friction-shearing type horizontal energy consumption effect is realized; and the annular disc spring plays a vertical shock isolation role. Due to the arrangement of a multidimensional shock absorption connecting device between the pipe pile and the bearing plate, the delayed energy consumption capacity of a connecting node is improved, and the phenomenon that a pipe pile head easily generates brittle fracture under the action of an earthquake bending shear load is avoided.

Description

technical field [0001] The invention relates to a pipe pile top friction-shear type energy dissipation connection device and a construction method thereof, belonging to the technical field of building anti-seismic technology. Background technique [0002] As one of the important forms of pile foundation, prestressed high-strength concrete (PHC) pipe piles are widely used in practical projects such as high-rise buildings and sea-crossing bridges. By adopting prestressing technology, and undergoing centrifugal forming and normal pressure-high pressure steam curing, PHC pipe piles can realize factory standardization and large-scale production, with high pile body strength, large single pile bearing capacity, reliable pile quality and short construction period. Short and many other advantages. However, due to the hollow structural characteristics of the PHC pipe pile, its bending and shear bearing capacity is weak, and it is prone to large deformation and even fracture under th...

AI Technical Summary

Problems solved by technology

The above invention patents can effectively control the vibration of the pile foundation to achieve the purpose of shock absorption and isolation, but under the action of strong earthquakes, there are disadvantages such as excessive lateral displacement of the support, complex structure, inconvenient maintenance, and insufficient vertical isolation capacity.

Images