| 摘要 |
A spherical type bridge lifting jack for maintenance is provided to support a bridge correspondingly to vertical and horizontal displacement of a bridge while lifting up a bridge at maintenance work for a bridge bearing installed between a deck and a pier of a bridge. A spherical type bridge lifting jack for maintenance for lifting up a bridge deck at maintenance work for a bridge bearing provided between a deck and a pier of a bridge includes a support member(100) located on the top of a pier and provided with a guidance chamber(140) having a fluid groove(142) to make a fluid flow in or out, a spherical member(520) inserted to the guidance chamber tightly by an O-ring, provided with a spherical groove(120) and reciprocated vertically by hydraulic pressure, a spherical friction member(200) provided with a spherical portion(220) adhered closely to the spherical groove of the spherical member to slide, an upper slide member(300) put on the spherical friction member to support the base of a bridge or a bridge beam, provided with a guide groove(320) and slid against the top of the spherical friction member to lift up a bridge when the spherical member ascends, a control block(400) coupled to the support member and located to the guide grooves of the upper slide member to control the horizontal displacement of the upper slide member, a lifting plate(600) installed to the base of the bridge or the bridge beam to support the top of the upper slide member when the spherical member ascends, many reinforcing panels(700) layered between the lifting plate and the upper slide member to regulate height, and a stopper placed between the top of the support member and the upper slide member to support the upper slide member and to maintain height. |
