Suction matching device capable of improving uplift bearing capacity of tubular pile

Abstract

The invention discloses a suction matching device capable of improving the uplift bearing capacity of a tubular pile. The suction matching device comprises a tubular pile body, a hollow cavity and a suction box, wherein the upper end of the tubular pile body and the lower end of the tubular pile body are each provided with a pile hoop; the hollow cavity is located in the center of the tubular pile, and the top of the hollow cavity is sealed by plain concrete; the suction box is arranged at the top of the hollow cavity in a matched mode and comprises a box body, an air suction pipe, an air valve and a piston; the box body is arranged at the top of the hollow cavity and is connected with the inner wall of the tubular pile body through a silica gel layer; the air suction pipe penetrates through the bottom of the box body, and the air on the upper side of the box body communicates with the air on the lower side of the box body through the air suction pipe; the air valve is located at the top of the air suction pipe; and the piston is located at the top of the box body. The suction matching device capable of improving the uplift bearing capacity of the tubular pile is suitable for a prefabricated embedded type tubular pile foundation, the suction capacity of the tubular pile to a soil body is improved by utilizing the principle of the negative pore pressure of the soil body, and theuplift bearing capacity of the tubular pile is improved.

Description

technical field [0001] The invention relates to the field of geotechnical engineering construction pipe piles, in particular to a suction supporting device for improving the pull-out bearing performance of pipe piles. Background technique [0002] Pullout-resistant pipe piles are widely used in industrial and civil buildings, municipal administration, metallurgy, ports, transportation and other fields. There are two main ways to ensure the pull-out bearing capacity of the existing pull-out pipe piles: the bottom expansion head and the use of prestressed tendons, which play a role in preventing the building from being pulled up when it is toppled and floated. After long-term use of the bottom expansion head, affected by soil extrusion and groundwater erosion, it is easy to cause cracks and damages to the bottom concrete, thereby greatly reducing the pull-out bearing capacity; and after long-term use of prestressed tendons, there will be more obvious stress dissipation And st...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a suction supporting device for improving the pull-out bearing capacity of pipe piles, which utilizes the principle of soil negative pore pressure to improve the adsorption capacity of the pull-out pipe piles to the soil and improve the pull-out bearing capacity of the pipe piles. Solve the above-mentioned problem that traditional pipe piles are difficult to recycle and reuse

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