KR20160026077A

KR20160026077A - A Lifting Gantry, and An Operating Method The Same

Info

Publication number: KR20160026077A
Application number: KR1020140113915A
Authority: KR
Inventors: 김기남; 정운; 김희성; 박건영; 서재훈; 차재언
Original assignee: 현대건설주식회사
Priority date: 2014-08-29
Filing date: 2014-08-29
Publication date: 2016-03-09

Abstract

Disclosed is a lifting gantry used for construction of a suspension bridge. The lifting gantry includes: a gantry main body formed to move along a main cable of the suspension bridge; two lifting beams arranged in the lower part of the gantry main body, wherein a bridge block is hung thereon; a lifting unit installed on the gantry main body to lift the lifting beams; and a beam connection unit connecting the lifting beams in the longitudinal direction of the beam or releasing the connection.

Description

A lifting gantry and a method of operating the lifting gantry,

The present invention relates to a lifting gantry and a method of operating the lifting gantry.

In general, suspension bridges are constructed through work processes in which bridge blocks (girder blocks) constituting the upper structure of bridges are lifted and bridge blocks are sequentially connected and fixed in the longitudinal direction of bridges.

A gantry device is used for lifting the bridge block. The gantry device is placed on the side of the main cable installed in the longitudinal direction of the bridge of the suspension bridge and moves along the extension direction of the cable. Blocks are sequentially lifted.

Considering the fact that the gantry unit moves along the cable with the gantry unit spanned over the main cable, it is important to secure a structure that can move smoothly on the main cable side as well as the stability of the lifting Do.

As such apparatuses used for lifting bridge blocks of suspension bridges, there are Japanese Patent No. 10-1405010 and Japanese Patent No. 10-1349298.

However, Japanese Patent No. 10-1405010 does not have a lifting beam capable of raising the stability of lifting, but simply lifts the lower end of the lifting rope in a state where it is directly connected and fixed to the reinforcing type (bridge block) And operation reliability can not be expected.

In addition, although Patent No. 10-1349298 has a lifting beam (lifting bar), there is a disadvantage in that the lifting beam contacts with the rinsing cable of the main cable when moving along the main cable (suspension cable) have.

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above problems,

SUMMARY OF THE INVENTION An object of the present invention is to provide a lifting gantry that not only improves the lifting stability of a bridge block when a suspension bridge is constructed but also has improved mobility for selecting a lifting position. It is a further object of the present invention to provide a method of operating said lifting gantry.

According to an embodiment of the present invention,

A gantry main body formed to be movable along a main cable of a suspension bridge;

Two lifting beams disposed beneath the gantry body and suspended by the bridge block;

A lifting part installed to lift the lifting beams at the gantry body side; And

A beam coupling part for coupling the lifting beams to each other in the beam length direction or releasing the coupling state;

.

According to another aspect of the present invention, there is provided a method of operating a lifting gantry,

Dividing the lifting beam;

Moving the gantry main body in a state where the lifting beam is divided; And

Reconnecting the lifting beam;

.

The present invention particularly provides a structure in which the lifting beam can be divided or reconnected in the longitudinal direction so that the lifting beam rinses when moving along the main cable for lifting positioning, The beam connection state can be easily manipulated so as to be movable.

Therefore, the present invention has the effect of securing further improved mobility and operation convenience in lifting work.

1 to 5 are views for explaining the structure and operation of a lifting gantry according to an embodiment of the present invention.
6 is a flowchart illustrating a method of operating a lifting gantry according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention will be described within the range that can be easily carried out by those having average knowledge in the art. Accordingly, the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

FIGS. 1 to 5 are views for explaining the structure and operation of a lifting gantry according to an embodiment of the present invention, and FIG. 6 is a flowchart for explaining a method of operating the lifting gantry.

1 to 5, a lifting gantry according to an embodiment includes a gantry body 2, a lifting beam 4, and a lifting portion 6.

The gantry main body 2 is formed so as to have a gantry structure that can be moved along the cable extending direction while being spread on the side of the main cable W which is provided for suspension bridge construction.

For example, as shown in Fig. 1, the gantry main body 2 includes a roller member A1 that rolls on a main cable W so as to allow rolling motion, And a clamp member A2 formed to restrict the clamp member A2.

That is, the gantry main body 2 is set in a position corresponding to the lifting position of the bridge block G while being moved on the main cable W while being moved along the extending direction of the main cable W Respectively.

The lifting beam 4 has a beam structure in which the bridge block G is capable of being lifted up and placed under the gantry body 2. [

The lifting beam 4 is composed of two lifting beams 4a and 4b having a shape divided in the longitudinal direction of the beam.

The lifting beams 4a and 4b can use a beam member extended in a state having, for example, a substantially square-shaped peripheral portion as in Fig.

The lifting beams 4a and 4b are arranged so as to be linearly aligned with each other in the longitudinal direction of the beam and arranged in a direction intersecting the extending direction of the main cable W under the gantry main body 2. [

The lifting beams 4a and 4b are formed so that the bridge block G can be connected in a suspended state by, for example, a connecting member B such as a chain or a wire.

The lifting portion 6 is formed to have a structure capable of lifting the lifting beam 4 in a state in which the bridge block G can be lifted from the gantry main body 2 side.

The lifting section 6 is provided with a sheave C1 and a sheave C2 as shown in Fig. 1 and is installed in such a state that the lifting beams 4a and 4b can be lifted horizontally from the gantry main body 2 side. do.

That is, the lifting section 6 is provided between the gantry main body 2 and the lifting beams 4a and 4b with the main cable W interposed therebetween on the basis of Fig. 2 as the sheave C1 and the wire C2, As shown in FIG.

The lifting section 6 is moved from the side of the gantry main body 2 by an operation of winding or unwinding the wire C2 in a state in which the wire C2 is transmitted to the sheave C1 side by receiving power from a separate driving source So that the lifting beams 4a and 4b can be lifted in a horizontal state.

As shown in FIG. 1, the lifting gantry according to one embodiment may be provided with two (or four) of two lifting gantries on the two main cables W installed for suspending bridge construction. In order to increase the stability of the lifting gantry, And the gantry main body 2 can be installed by being connected to each other by the bar A3.

On the other hand, a lifting gantry according to one embodiment includes a lifting beam 4 and a corresponding beam fastening portion 8.

The beam fastening portion 8 is formed to have a fastening structure capable of connecting the two lifting beams 4a and 4b in the lengthwise direction, respectively, or releasing the connection state.

The beam clamping part 8 is provided with a clamping member D1 and is formed so that the two lifting beams 4a and 4b can be connected to each other or released by the clamping member D1.

The fastening member D1 can be a pin. Particularly, the fastening method using the pins has an advantage that the fastening structure is simple, and the fastening operation can be performed easily and quickly.

The protrusion D2 and the groove D3 may be formed on the connecting end side of the two lifting beams 4a and 4b to match the fastening structure of the fastening member D1.

That is, the fastening member D1 can be fastened in a state as shown in FIG. 3 so as to generate a fastening force to hold the protruding portion D2 and the groove D3 in a coupled state. It is preferable that at least two fastening members D1 are fastened to the connection points of the lifting beams 4a and 4b.

The beam clamping part 8 can not only fasten the two lifting beams 4a and 4b to form an integral beam shape but also can form a divided beam shape by releasing the clamping state. Therefore, it is possible to provide a beam shape corresponding to the working conditions.

That is, when the bridge block G is lifted, the two lifting beams 4a and 4b can be set to be connected to each other in a fixed beam form. When the gantry main body 2 moves along the main cable W, Shaped beam shape.

Particularly, in the divided beam form, for example, the bridge block G is lifted and rinsed and fixed to the cable W1 side, and then the gantry main body 2 is lifted up to the main cable W It is possible to move to a state in which contact interference with the beam does not occur even if the cable W1 is located at the front side.

A method of operating a lifting gantry according to one embodiment to match such moving work conditions will now be described with reference to the drawings.

Referring to FIG. 6, a method of operating a lifting gantry according to an embodiment includes a lifting beam splitting step S1, a gantry body moving step S2, and a lifting beam connecting step S3.

The lifting beam splitting step S1 is such that the two lifting beams 4a and 4b in the form of an integral beam form a divided beam form before the movement of the gantry body 2 as in Fig.

That is, the lifting beam splitting step S1 releases the clamping state of the beam clamping part 8 so that the two lifting beams 4a and 4b can be separated from each other.

The gantry main body 2 is moved toward the subsequent lifting point along the main cable W with the connection ends of the two lifting beams 4a and 4b being separated from each other as shown in Fig. Moving.

Then, the gantry main body 2 can be moved in a state in which the cable W1 passes through the clearance between the connection ends of the separated lifting beams 4a and 4b. Therefore, when the gantry main body 2 moves along the main cable W, it is possible to improve the problem that the movement is restricted by the contact interference between the beam and the cable W1, particularly.

The lifting beam connecting step S3 connects the lifting beams 4a and 4b again so as to form an integral beam shape capable of lifting the bridge block G.

That is, in the lifting beam connecting step S3, the connecting ends of the lifting beams 4a and 4b separated from each other are fastened and fixed by the beam fastening part 8 so as to be connected to each other to form an integral beam shape.

Then, in a state where the gantry main body 2 is moved, a succeeding operation can be carried out while hanging the bridge block G on the side of the lifting beams 4a and 4b having an integral beam shape, The bridge superstructure can be sequentially installed in a state of extending in the longitudinal direction of the suspension bridge.

2: gantry body 4: lifting beam 6: lifting part
8: beam clamping part S1: lifting beam splitting step S2: gantry body moving step
S3: lifting beam connection step

Claims

A gantry main body formed to be movable along a main cable of a suspension bridge;
Two lifting beams disposed beneath the gantry body and suspended by the bridge block;
A lifting part installed to lift the lifting beams at the gantry body side; And
A beam coupling part for coupling the lifting beams to each other in the beam length direction or releasing the coupling state;
. &Lt; / RTI >

The method according to claim 1,
The two lifting beams,
And are arranged in a direction intersecting with the main cable while being mutually straight in the beam longitudinal direction.

The method according to claim 1,
The lifting unit includes:
A lifting gantry provided with a sheave and a wire and capable of lifting the lifting beams by a winding or unwinding action by the sheave and the wire at the gantry body side.

The method according to claim 1,
The beam-
Wherein the lifting gantry is provided so as to be capable of tightening or tightening the connection end side of the lifting beams by the fastening force of the fastening member or releasing the fastening state.

The method of claim 4,
The fastening member
A lifting gantry comprising a pin.

a) dividing the lifting beam;
b) moving the gantry body in a state where the lifting beam is divided; And
c) reconnecting the lifting beam;
Of the lifting gantry.

The method of claim 6,
The step a)
The lifting gantry is released by releasing the clamping state of the two lifting beams coupled in the beam length direction.

The method of claim 6,
The step b)
A method of operating a lifting gantry in which a gantry body moves in a state in which a rinse cable of a main cable passes between divided lifting beams.

The method of claim 6,
The step c)
And the divided lifting beams are fastened and connected in a state in which they are mutually straight in the beam length direction.