KR-102964747-B1 - APPARATUS FOR DISASSEMBLING BRIDGE SUPERSTRUCTURE

KR102964747B1KR 102964747 B1KR102964747 B1KR 102964747B1KR-102964747-B1

Abstract

The present invention discloses a dismantling device for a bridge superstructure capable of safely and efficiently dismantling a superstructure on a bridge pier. The dismantling device of the present invention comprises a trolley beam, a plurality of first lifting devices, a plurality of tilt adjustment devices, a plurality of second lifting devices, and a plurality of first horizontal transfer devices. The trolley beam is positioned above a unit superstructure having a girder to be dismantled among a plurality of superstructures supported on a plurality of substructures. The first lifting devices are connected between the trolley beam and two adjacent superstructures among the plurality of superstructures, and between the ends of the trolley beam, so as to lift the unit superstructure together with the trolley beam. The tilt adjustment devices are connected between each of the two superstructures and the plurality of first lifting devices so as to maintain the horizontal level of the trolley beam in conjunction with the first lifting devices. The second lifting devices are connected between the unit superstructure and the trolley beam so as to be able to raise and lower the unit superstructure relative to the trolley beam, and are equipped with a support mechanism that supports the girder and a lifting strand jack that lifts the unit superstructure supported by the support mechanism. The support mechanism consists of first and second support brackets, a pair of support bars, and a pair of hinge bars. The first horizontal transfer devices are installed on the trolley beam so as to be able to transfer the second lifting devices along the longitudinal direction of the superstructure. The first horizontal transfer devices are configured to be able to transfer and load the unit superstructure, which is lifted by the operation of the first lifting devices and the second lifting devices, onto a transport means. According to the present invention, by first lifting the unit upper structure from the lower structure while maintaining the horizontal level of the unit upper structure by operating the first lifting devices and tilt adjustment devices from the lower part of the unit upper structure, and secondly lifting the unit upper structure against the trolley beam by operating the second lifting devices from the upper part of the unit upper structure, the upper structure can be safely and efficiently dismantled, thereby improving safety and efficiency.

Inventors

김지혜

Dates

Publication Date: 20260513
Application Date: 20230720

Claims (12)

A trolley beam positioned above a unit superstructure having a girder to be dismantled among a plurality of superstructures supported on a plurality of substructures; A plurality of first lifting devices connected between two upper structures adjacent to both ends of the unit upper structure and both ends of the trolley beam, so as to be able to lift the unit upper structure together with the trolley beam; A plurality of tilt adjustment devices connected between each of the two upper structures and the plurality of first lifting devices so as to maintain the horizontal level of the trolley beam in conjunction with the plurality of first lifting devices; A plurality of second lifting devices, each having a support mechanism that supports the girder and a lifting strand jack that lifts the unit upper structure supported by the support mechanism, connected between the unit upper structure and the trolley beam so as to be able to raise and lower the unit upper structure relative to the trolley beam; It includes a plurality of first horizontal transfer devices installed on the trolley beam to transfer the plurality of second lifting devices along the longitudinal direction of the plurality of upper structures, and The support mechanism comprises first and second support brackets arranged adjacently on both sides of the girder, a pair of support bars connected side by side so as to be rotatable below the first and second support brackets and supporting the lower surface of the girder, and a pair of hinge bars connected to the upper part of the first and second support brackets so as to be pivotable. A dismantling device for a bridge superstructure, configured such that the plurality of first horizontal transfer devices can transport and load the unit superstructure, which is lifted by the operation of the plurality of first lifting devices and the plurality of second lifting devices, onto a transport means.
In paragraph 1, Each of the above plurality of first lifting devices is, A lifting jack having a cylinder housing and a piston rod coupled to the cylinder housing so as to be extendable and extendable, with the tip connected to both ends of the trolley beam; A dismantling device for a bridge superstructure comprising a hinge joint connecting the cylinder housing to the two superstructures so that the cylinder housing can pivot.
In paragraph 2, A dismantling device for a bridge superstructure, wherein a rotary joint is further coupled to the tip of the piston rod so as to rotate about the central axis of the piston rod, and the rotary joint is connected to both ends of the trolley beam so as to pivot by a clevis.
In paragraph 2, Each of the plurality of tilt adjustment devices comprises a tilting jack, one end of which is connected by a first hinge joint to pivot to the two upper structures adjacent to the lifting jack, and the other end of which is connected to the cylinder housing by a second hinge joint to pivot. A dismantling device for a bridge superstructure, wherein the tilting jack is configured to maintain the lifting jack vertically so as to maintain the horizontal level of the trolley beam.
In paragraph 1, The above lifting strand jack is, A hydraulic jack mounted on the first horizontal transfer device so as to be transferred by the operation of the first horizontal transfer device; A cable connected to the hydraulic jack so as to be pulled by the operation of the hydraulic jack to lift the unit upper structure relative to the trolley beam; A fixed anchor is provided that is connected to the end of the cable and coupled to a pair of hinge bars so that the support mechanism can pivot around the pair of hinge bars. A dismantling device for a bridge superstructure, wherein when the unit superstructure and the trolley beam are connected by the plurality of second lifting devices, the hydraulic jack of the lifting strand jack is mounted on the trolley beam, and the cable of the lifting strand jack is connected to the pair of hinge bars by a fixed anchor so as to lift the unit superstructure relative to the trolley beam.
In paragraph 5, Each of the above plurality of first horizontal transfer devices is, A carriage equipped with the above hydraulic jack; A horizontal transfer jack having one end connected to the carriage so as to be able to transfer the carriage along the longitudinal direction of the plurality of upper structures; A stopping clamp to which the other end of the horizontal transfer jack is connected so that the horizontal transfer jack can extend to transfer the carriage; A dismantling device for a bridge superstructure comprising a linear motion guide having a guide rail mounted on the upper surface of the trolley beam along the longitudinal direction of the plurality of superstructures, and a pair of guide rollers mounted on the carriage to roll along the guide rail and guide the translational motion of the carriage into linear motion.
In paragraph 6, A dismantling device for a bridge superstructure having an EPDM pad further attached to the lower surface of the carriage to allow it to slide along the guide rail.
In paragraph 1, A dismantling device for a bridge superstructure, further comprising a plurality of third lifting devices for lifting the unit superstructure from a bridge bearing device connected to the support mechanism and supporting the unit superstructure.
In paragraph 8, A dismantling device for a bridge superstructure, wherein each of the plurality of third lifting devices is connected to the pair of hinge bars and configured such that the first and second support brackets can pivot around the pair of hinge bars when the horizontal level of the trolley beam is maintained by the operation of the plurality of first lifting devices and the plurality of tilting devices.
In Paragraph 9, A dismantling device for a bridge superstructure, further comprising a plurality of second horizontal transfer devices installed in the substructure to transport the unit superstructure lifted from the bridge bearing device along the width direction of the plurality of superstructures by the operation of the plurality of third lifting devices.
In Paragraph 10, Each of the above plurality of first horizontal transfer devices is, A carriage on which each of the above plurality of third lifting devices is mounted; A horizontal transfer jack having one end connected to the carriage so as to be able to transfer the carriage along the width direction of the plurality of upper structures; A stopping clamp to which the other end of the horizontal transfer jack is connected so that the horizontal transfer jack can extend to transfer the carriage; A dismantling device for a bridge superstructure comprising a linear motion guide having a guide rail mounted on the upper surface of the lower structure along the width direction of the plurality of upper structures, and a pair of guide rollers mounted on the carriage to roll along the guide rail and guide the translational motion of the carriage into linear motion.
In Paragraph 11, A dismantling device for a bridge superstructure having an EPDM pad further attached to the lower surface of the carriage to allow it to slide along the guide rail.

Description

Apparatus for Disassembling Bridge Superstructure The present invention relates to a technology for dismantling a bridge superstructure, and more specifically, to a dismantling device for a bridge superstructure capable of safely and efficiently dismantling a bridge superstructure. A bridge consists of a superstructure, a substructure, and ancillary facilities. The superstructure is a structure situated on top of the substructure and is composed of girders and slabs. The substructure is designed to safely transfer loads from the superstructure to the underlying foundation and ground through abutments and piers. Ancillary facilities consist of bridge bearings, handrails, expansion joints, deck drainage, and bridge inspection facilities. Recently, the need for bridge demolition has been steadily increasing due to the growing number of aging bridges and social factors. Since bridge structures are constructed robustly with structural stability in mind, dismantling them is not an easy task; therefore, appropriate demolition and lifting methods must be selected by considering the type, form, scale, and demolition conditions of the structure. In particular, if the demolition of the superstructure is carried out in urban areas where numerous citizens reside, the demolition method must aim for low noise, vibration, and dust reduction, as well as minimized traffic disruption, in addition to basic objectives. Accordingly, there is a need to review methods applicable to structures located in urban areas, particularly bridges, and to develop bridge superstructure demolition devices that are environmentally friendly and minimize complaints from surrounding residents. Bridge demolition can be classified into two methods: moving the superstructure from the piers to the ground, and dismantling the superstructure and moving it from the piers using trolleys. Korean Registered Patent No. 10-1026012, "Method for Dismantling a Bridge Deck Using a Lifting Jack Integrated with a Pier," is a dismantling method for separating a superstructure from a pier and moving it to the ground. The method described in this patent involves cutting and dismantling the bridge deck, or superstructure, surrounding the pier. To dismantle the bridge, a temporary dismantling structure is installed on the upper surfaces of two adjacent piers, and a lifting jack is installed on the jack base of the temporary structure. A lifting beam is installed on the ground, and the lifting beam is connected to the lifting jack using a wire, allowing the lifting beam to be raised to the lower part of the superstructure. To prevent interference with the piers during the lowering of the superstructure, the superstructure is cut, and the lifting beam supporting the superstructure is lowered to dismantle the superstructure. Since the method described in this patent involves lowering the superstructure to the ground and dismantling it through the lifting of the lifting jack and the lifting beam, traffic control on the ground is absolutely necessary. In particular, in areas such as rivers and valleys in mountainous regions, there are many constraints, including the need for barges and trolleys to transport superstructures, as well as the requirement to secure roads for their operation. Furthermore, as the length and stroke of the lifting jacks become longer, there is a high risk of safety accidents occurring due to bending deformation or breakage of the jack rods, or the overturning of the superstructures. Korean Registered Patent No. 10-1872265, "Method for Dismantling a Bridge," describes a dismantling method in which a superstructure is separated from a pier and moved by a trolley. The dismantling method described in this patent involves installing a lifting beam between the piers where the girder is to be dismantled, and then using the lifting beam to transport the girder to a position along a skid rail. The lifting beam is raised by a jack to separate the girder from the pier. When the uppermost surface of the lifting beam reaches the same height as the uppermost surface of the skid rail, the girder is transported along the skid rail and moved to a crushing facility. The jack consists of a base configured to cover a portion of the upper side of the pier, reaction bars positioned on the upper and lower sides that protrude toward an adjacent pier, and a load bar connected to penetrate the reaction bars. The method of this patent document transfers the superstructure separated from the bridge pier onto a trolley via skid rails and then transports it to a crushing plant capable of crushing. The contents disclosed in the above patent documents are incorporated herein by reference. FIG. 1 is a front view schematically showing the state in which a dismantling device for a bridge superstructure according to the present invention is installed on a bridge. FIG. 2 is a front view showing a dismantling device for a bridge superstructure according to the present invention. FIG. 3 i