Pile head breaking device of bridge pile foundation: Fid-Bau Portal

Pile head breaking device of bridge pile foundation

SHU GUOMING / BU ZONG / GENG YANDONG / JIANG LI / FAN JINGJIE / LI YONGMEI / ZHANG WENHUI / SONG YANKUN / SONG CHAO / GENG TIANSHU

Abstract

The invention provides a pile head breaking device of a bridge pile foundation, and belongs to the technical field of concrete pile foundations. The pile head breaking device comprises a pull-out cylinder, a sealing assembly and a driving assembly. The lower end of the pull-out cylinder is used for being inserted into pile foundation concrete before initial setting. The sealing assembly is hingedto the lower end of the pull-out cylinder. The driving assembly is arranged on the pull-out cylinder, is connected with the sealing assembly, and is used for driving the sealing assembly to rotate around a hinge point, so that the sealing assembly seals the lower end of the pull-out cylinder. Before the pile foundation of a cast-in-place pile is initially set, the lower end of the pull-out cylinder is inserted into a pile foundation hole. During the insertion of the pull-out cylinder, concrete in the pile foundation hole can enter the pull-out cylinder. The sealing assembly is driven by the driving assembly to rotate around the hinge point, the lower end of the pull-out cylinder can be sealed by the sealing assembly, the pull-out cylinder is lifted away from the pile foundation hole underthe lifting effect of lifting equipment, and therefore the length of over-poured concrete part of the cast-in-place pile foundation can be reduced.

本发明提供了一种桥梁桩基的桩头破除装置，属于混凝土桩基技术领域，包括掏出筒、封闭组件和驱动组件；掏出筒的下端用于插入到初凝前的桩基混凝土内；封闭组件与所述掏出筒的下端铰接；驱动组件设置在所述掏出筒上，并与所述封闭组件连接，用于驱动所述封闭组件绕铰接点转动、以使所述封闭组件封闭所述掏出筒的下端；在灌注桩桩基初凝之前，将掏出筒的下端插入到桩基孔内；在掏出筒插入过程中，桩基孔内的混凝土会进入到掏出筒内，通过驱动组件驱动封闭组件绕铰接点转动，能够使封闭组件封闭掏出筒的下端，并在起吊设备的起吊作用下将掏出筒吊离桩基孔，从而能够减少灌注桩桩基的超灌混凝土部分的长度。

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