KR20150108625A - Bridge construction method using non-self launching beam launcher - Google Patents

Abstract

The present invention relates to a bridge construction method using a beam launcher temporarily built in an upper portion of a bridge pier by towing a girder to an upper portion of the bridge pier. The beam launcher is raised using a towing between the piers to be moved, thus enabling a more efficient and economical bridge construction to be performed on an elevated road wherein a plurality of molds are installed in one type bridge pier.

Description

[0001] BRIDGE CONSTRUCTION METHOD USING NON-SELF LAUNCHING BEAM LAUNCHER [0002]

The present invention relates to a bridge construction method using a visa stock beam launcher, and more particularly, to a bridge construction method using a beam launcher that lifts a girder to an upper part of a pier and hits the upper part of the pier.

Generally, a bridge is a structure to be installed across an elevated road or a river to be installed on a road. Such a bridge is largely composed of a pier (including alternation), a girder installed on the pier and a slab installed on the girder.

The girders are a plurality of beam members arranged on the piers at regular intervals. In the case of a conventional bridge construction method, a plurality of bridge piers (including alternations) are built up and a plurality of girders are mounted on the bridge piers.

In this manner, a plurality of girders are mounted on the bridge piers, and then the slabs are constructed by pouring the slab concrete over the girders, thereby completing the bridge.

In general girder bridges construction, bridge bridges are constructed by putting method on site and pre-fabricated precast girders are mounted on site.

At this time, a girder installation work using a beam launcher is introduced so that bridge construction work can be completed safely and efficiently without heavy equipment such as a crane in a mountainous area.

That is, by using a beam launcher on the girder, the girder can be safely installed, and a road bridge can be constructed without heavy equipment such as a crane and a girder crash.

1A, the beam launcher 100 may be a mobile equipment that hoists and hitches the girder 220 in the longitudinal and transverse directions to the top of the pier 210.

The beam launcher 100 may include a mountainous region where the bridge pier 210 is high and difficult to lift by a crane or which requires a stopping operation for conveying the girder 220 below the bridge pier 210, And exhibits excellent construction efficiency. In particular, mountainous areas are evaluated as suitable for many domestic road construction sites.

1B, 1C and 1D, a conventional bridge building beam launcher 100 includes a main truss 110, a main winch 120, an auxiliary winch 130, a support 140, a transverse rail 150, an under roller 160, a front end strut 170, and a rear end strut 180.

That is, the bridge launcher 100 for a bridge is constructed of two (two) pair of left and right mold trusses 110 as shown in FIG. 1B. The main winch 120 and the auxiliary winch 130 1C and FIG. 1D, the girders 220 pulled up by the winches are pulled up by the winchs by the transverse rails 110 formed on the upper part of the mold truss 110 150, as shown in FIG.

1C, the front end strut 170 and the rear end strut 180 are formed at both ends (front and rear) of the isosceles triangular-shaped truss 110, So that the beam launcher can be advanced and reversed while being stably supported by the under roller 160.

The assembly of the beam launcher 100 and the bridge construction will be described as follows.

First, a pair of mold trusses 110 are assembled in an assembling station, and then a frame including a front end strut 170 and a rear end strut 180 is assembled to the front and rear surfaces of the mold truss 110.

The main winch 120 and the auxiliary winch 130 are installed on the upper part of the assembled mold truss 110 and wires (not shown) for driving the beam launcher 100 are connected to the mold truss 110 and the winch 120, and 130, the assembly of the beam launcher 100 is completed.

Next, a support 140 for safely moving heavy materials such as the beam launcher 100 and the girder 220 is installed in the upper coping portion of the pier 210 as shown in FIG. 1d.

A lateral rail 150 is installed on the support 140. The transverse rail 150 is provided with an under roller 160 and a mold truss 160 having winchs 120 and 130 and a front end strut 170 and a rear end strut 180 110 are supported.

The transverse rail 150 provided with the under roller 160 is installed on the top of each pier and moves (advances and retreats) while being launched by the under rollers 160 installed at the front and rear sides of the truss 110.

This movement can be freely forward or backward, which facilitates moving the beam launcher 100 forward or backward across the transverse rail 150 on which the under roller 160 is mounted.

1E is a cross-sectional view of an urban highway bridge according to an embodiment of the present invention. In the elevated road, a coping portion 230 is formed on a pier 210, a girder 220 is installed on an upper surface of the coping portion, It can be seen that the girder bridges are constructed with slabs on the upper part.

At this time, since the overpass is constructed on the road unlike the general bridge, the bridge for the overpass is minimized while the portion for the overpass is minimized while the coping portion is designed to extend long in the transverse direction. As a result, The cantilever type construction can not be avoided.

In addition, due to the characteristics of the overpass, the construction of the girder is inevitable to control the road. However, in the case of 1e, it is basically necessary to control the six lanes of the lower part of the coping part in both of the one lane 8 lane and the 5 lane road. , And a five-lane road will be reduced to a two-lane road.

However, a larger problem is that the bridge pier 210 has a length in which the coping portion 230 occupies almost six lanes in the transverse direction. Therefore, when the beam launcher 100 having the weight as described above is set on the outermost side of the coping portion, The safety problem such as the conduction of the coiling portion due to the load is inevitably raised.

Further, since the conventional beam launcher 100 has a total length of 2 spans so as to move forward in a self-propelled manner, there is a limit in reducing the weight. Therefore, when the flywheel 100 is installed on a high- There is a case in which it is impossible to operate the beam launcher. Therefore, the construction of the beam launcher 100 at a high level is very limited.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a method and apparatus for efficiently opening and unloading a girder even when a beam launcher that minimizes weight is used in an overpass construction in which a plurality of molds This is a technical problem to solve the provision of a bridge construction method using a visa stock beam launcher capable of making a visa.

According to an aspect of the present invention, there is provided a method of constructing a bridge using a visa stock beam launcher,

First, the beam launcher is provided with two lifting winches on the upper surface of two traveling trusses spaced transversely from each other, so that the girders transported below the overpass can be lifted between the traveling trusses. When the loading of the girders is completed, Since the runner must extend the mold truss over two spans, the length of each of the mold trusses must be long and the weight must be increased accordingly. Therefore, the conventional beam launcher has a heavy weight, and therefore, there is a limit in using the beam launcher in a highway using a coping portion installed on one stock pier.

Accordingly, the beam launcher of the present invention includes a lifting winch and a pair of traveling trusses, but is not made to have a length spanning two spans, but has a length of about one span, and a crane below the overpass The same lifting device is used.

At this time, the lifting device is fixed to the work site B between the lower piers to maintain the traffic flow on the side of the elevated road, so that the mold truss can be moved within the working radius.

At this time, the lifting winch is lowered to the work site, the traveling truss is moved forward by a certain length by a hydraulic cylinder or a winch, and is set at the working radius position of the lifting device. Then, the traveling truss is moved to the front clamping portion one by one, And the girders are sequentially placed between the copings.

According to the present invention, the beam launcher can perform the operation of lifting and fixing the girder, but it can not move forward due to the magnetic force. Therefore, it is possible to lift the girder after the forward movement using the lifting device, It is possible to construct more efficient and economical bridges in an overpass construction in which a plurality of molds are to be installed. The beam launcher of the present invention utilizes the method of moving the visor stock in the sense that the beam launcher moves forward by means of the lifting device. Thus, compared with the conventional self-propelled manufacturing method, the weight is minimized while maintaining the traffic on the side of the overpass, .

FIG. 1A shows a girder bridge construction photograph using a conventional beam launcher,
1B is a photograph of a conventional beam launcher,
1C is a front perspective view and a plan perspective view of a conventional beam launcher,
1D is a sectional view of a conventional beam launcher (winch and mold truss), an under roller, a lateral rail, a support, a PSC girder,
FIG. 1E is a view showing the construction of a conventional high-
FIGS. 2A, 2B, and 2C are a construction flowchart of a single span girder using the beam launcher of the present invention,
FIGS. 3A, 3B, 3C, 3D, 3E, 3F, 3G and 3H are flow charts of a method of moving the visa stock beam launcher of the present invention forward.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

[Construction of one span girder using the beam launcher of the present invention]

FIGS. 2A, 2B, and 2C show a construction flowchart of a single span girder using the beam launcher of the present invention.

The beam launcher 300 is configured to include a pair of mold trusses 310, a lifting winch 320, a transverse moving bogie 330 and a transverse rail 340, The girder 220 is lifted onto the upper surface of the coping portion 230 between the bridge pier and the pier and then both ends are supported to be supported.

The girders 220 are mounted on upper surfaces of the coping portions 230 spaced apart from each other in the longitudinal direction so that both ends are supported, and a plurality of the girders 220 are also spaced apart from each other in the lateral direction. The beam launcher 300 is also configured to mount the lifted girder 220 while moving in the lateral direction.

To this end, lateral rails 340 are provided in advance on upper surfaces of the respective coping portions 230 spaced longitudinally from each other with respect to one span, and one transverse rail 340, which moves in the lateral direction along the lateral rail 340 A direction movement carriage 330 is installed on the upper surface of each coping portion 230.

And a pair of mold trusses 310 are installed on the upper surface of the transverse movement carriage 330.

The lifted girder 220 between the mold trusses 310 can be laterally moved by the transverse moving bogie 330 together with the mold truss 310 to allow the girder 220 to be mounted at a desired position do.

On the upper surface of the pair of mold trusses 310, a lifting winch 320 is mounted. The lifting winch 320 is installed on the upper surface of the mold truss 310 so that the lifting winch 320 can move in the longitudinal direction along the upper surface of the mold truss 310. A winch support base 321, A moving roller is integrally formed under the winch 322 so that lateral movement of the winch 322 is limited.

At this time, since the girder 220 is a beam member (such as a PSC girder), a pair of lifting winches 320 are also installed on the mold truss 310 so as to be lifted by wire ropes attached to both ends.

When the setting of the beam launcher 300 is completed, the girder 220 is lifted and held using the beam launcher 300. Referring to FIGS. 2A, 2B and 2C, the girder 220 will be described below.

As shown in FIG. 2A, the coping portion 230 is installed on the one-piece pier 210 of the flyover 200 so as to extend in the lateral direction, and the beam launcher 300 is installed.

The mold truss 310 of the beam launcher 300 is moved along the lateral rail 340 to the position for lifting the girder 220 by the lateral movement carriage 330 .

The lower part of the overpass 200 controls the vehicle passage and carries the prefabricated girder 220 by using a truck or the like on the work site and is lifted up to a position between the cast trusses 310 of the beam launcher 300 320 are provided with wire ropes.

As shown in FIG. 2B, the wire rope girder 220 is lifted to be positioned between the mold trusses 310, and the winch is fixed to the winch support. This is because the mold truss 310 must be moved in the lateral direction together with the lifted girder 220 so that conduction or the like does not occur during movement.

2C, the girder 220 is lifted and the fixed truss 310 is horizontally moved using the transverse moving bogie 330. In this case,

This movement makes use of the transverse rail 340 pre-installed on the coping portion 230. When the lifted girder 220 is moved to the desired position, the transverse moving bogie 330 is fixedly set and the winch 322 So that both end portions of the girder 220 are held between the coping portions 230.

The beam launcher 300 of the present invention must be moved to the front micro-machined coping unit (not shown) when all of the girders 220 to be installed on the coping unit 230 are mounted. There is no drive device or the like that can move forward to reduce the weight, so that the present invention uses a beam launcher 300 having a mold truss corresponding to a length of one span, The lifting device 400 is used.

The forward movement of the beam launcher 300 using the lifting device 400 will be described below.

[Method of constructing a bridge using visa stock beam launcher of the present invention]

3A, 3B, 3C, 3 D, 3 E, 3 F, 3 G and 3 H, as described above, after the girder 220 is fixed in one span, And the operation sequence of moving the launcher 300 is shown.

First stock piers 210a, 210b and 210c like the elevated road 200 of the present invention are first installed in the traveling direction of the overpass and the copings 230a, 230b and 230c ) Will also be built in advance.

The left pier 210a and the coping portion 230a are referred to as a rear pier and a rear coping portion, and the front pier 210b and the coping portion 230b adjacent to the rear pier and the coping portion are intermediate piers, And the bridge pier 210c and the coping portion 230c at the front adjacent to the intermediate pier and the coping portion are referred to as a front pierce portion and a forward-facing portion.

Of course, the one-piece piers 210a, 210b, 210c formed with the upper portions of the coping portions 230a, 230b, 230c will be installed in a larger number in accordance with the longitudinal extension length of the overpass, It is to be noted that the one-stock bridge columns 210a, 210b, and 210c are installed.

At this time, the girder 220 is already placed between the rear and middle coping portions 230a and 230b by the beam launcher 300, and the beam launcher 300 is moved to the intermediate bridge and the coping portion.

First, as shown in FIG. 3A, a pair of mold trusses 310 are set toward the center of the rear and middle coping portions 230a and 230b in consideration of the stable beam launcher 300 movement and the working radius of the lifting device 400, The lifting device 400 (such as a crane) is set on the work site B around the intermediate pier 210b.

Specifically,

The temporary transverse beam 500 is installed on the upper surface of the rear side of the installed girder 220 to set the template truss 310 to be supported on the girder 220 by the temporary transverse beam 500.

At this time, the installation height of the temporary transverse beam 500 is adjusted so that the rear portion of the truss 310 is slightly lifted.

As a result, it can be seen that the rear portion of the mold truss 310 is pulled up from the rear transverse moving carriage 330a provided on the rear coping portion 230a.

Next, the rear transverse moving carriage 330a separated by using the wire rope of the rear lifting winch 320a is rotated (not shown) so as to extend in the longitudinal direction between the mold trusses 310, and then the intermediate coping portion And the rear lateral rails 340a separated from the rear coping portions 230a are returned to the intermediate coping portion 230b and the rear lateral rails 340b are separated from the rear coping portions 230a after the rear lifting winch 320a is returned to the original position. And is placed on the upper surface of the girder 220.

As shown in FIG. 3A, the rear lifting winch 320a is set to be adjacent to the front lifting winch 320b. That is, it can be seen that the rear and front lifting winches 320a and 320b are positioned within the working radius of the lifting device 400. [

Next, as shown in FIG. 3B, the lifting device 400 separates the rear lifting winch 320a and the front lifting winch 320b from the mold truss 310 so as to work around the intermediate pier 210b (B).

At this time, the lifting device 400 may be made to have a minimum lifting capacity and a size enough to move the mold truss 310 toward the front coping portion 230c, for example, And economical efficiency.

Next, as shown in FIG. 3C, the rear lateral rail 340a and the rear lateral movement truck 330a, which are seated on the girder 220 of the intermediate coping portion 230b, (230c) so as to be reinstalled on the upper surface thereof. As a result, the rear lateral rail 340a and the rear lateral movement carriage 330a are used as they are.

Next, as shown in FIG. 3D, one end of the hydraulic jack P is connected to the intermediate transverse moving truck 330b provided on the upper surface of the intermediate coping portion 230b, and the launching bracket rail Q The hydraulic jack is used to push a pair of the template trusses 310 forward.

The extrusion of the mold truss 310 proceeds to the position of the temporary transverse beam 500 so that the mold truss can be stably supported in the extrusion process. However, the position of the lifting device 400 is fixed It is possible to stably move the mold truss 310 by installing a wire rope in the middle part of the mold truss 310. [

Next, as shown in FIG. 3E, one of the trusses 310a is pulled up through the wire rope by using the lifting device 400. Then, the rear truss 310a is reattached to the upper surface of the front coping portion 230c So as to be supported on the upper surface of the carriage 330a.

Next, as shown in FIG. 3G, the other one of the trusses 310b is pulled up by using the lifting device 400, and is then supported by the rear transverse moving carriage 330a installed on the upper surface of the front coping portion 230c The other one of the template trusses 310a is also moved forward.

Next, as shown in FIG. 3H, the rear lifting winch 320a and the forward lifting winch 320b, which are placed on the work site B, are guided by the intermediate trussing portion 230b and the front trussing portion 230c The girder 220 is further lifted between the intermediate coping portion 230b and the front coping portion 230c as shown in FIGS. 2A, 2B, and 2C.

At this time, the temporary transverse beam 500 is moved into the working radius of the lifting device 400 and becomes additionally usable.

In this way, the slab is separately installed in the pier 210 installed in the entire overpass, thereby completing the final overpass.

That is, after all the girders are installed, the beam launcher 300 is placed on the work site using the lifting device 400, and the slab is constructed on the girder to complete the bridge.

The present invention allows the girder 220 to be stably placed in the beam launcher 300 even in a highway using a single pier bridge 210 while maximally permitting vehicle passage using only the limited work site B under the coping portion 230. [ And the tensile device 400 can be made to have a length spanning over one span, so that it is possible to optimize the construction of the overpass road 200, thereby making it possible to construct an elevated road which can secure stable and economical efficiency.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

210: Pier
210a, 210b, 210c: rear, middle,
220: girder
230:
230a, 230b, 230c: rear, middle,
300: Beam Launcher
310: Mold Truss (Main Truss)
310a, 310b: a pair of mold trusses
320: lifting winch
320a, 320b: rear lifting winch, front lifting winch
321: winch support 322: winch
330: transverse moving lane
330a, 330b: a rear lateral moving truck, a forward lateral moving truck
340: transverse rail
340a, 340b: a rear lateral rail, a front lateral rail
400: lifting device

Claims (5)

(a) installing a plurality of one-piece bridge piers (210) having a coping portion (230) on an upper portion thereof in a longitudinal direction;
(b) a transverse moving rail 330 moving along a transverse rail and a transverse rail 340 are provided on adjacent coping portions 230, respectively, and then a transverse moving rail 330 mounted on the adjacent coping portion 230 A pair of mold trusses 310 having a length of one span in the longitudinal direction are installed between the bogies and a lifting winch 320 including rear and front lifting winches 320a and 320b is provided on the top of the mold truss 310 Installing a beam launcher (300) between adjacent coping portions (230);
(c) Using the beam launcher 300, the girder 220 carried to the work site B under the one stock pier 210 is lifted between the mold trusses 310, And installing a girder 220 over one span;
(d) The beam launcher 300 is moved laterally to the central portion of the coping portion 230 and then moved to a position within the lifting device working radius by using the lifting device 400 fixed to the lower portion of the front pier of the adjacent coping portion 230 Moving the donut beam launcher 300 to the front coping portion after pulling; And
(e) lifting the girder to the front coping portion by using the moved beam launcher 300, and then mounting the girder to the coping portion. The method according to claim 1,
The step (d)
The temporary transverse beam 500 is installed on the upper surface of the girder 220 which is fixed in the step (c) so that the template truss 310 is supported on the girder 220 by the transverse transverse beam 500, 500 to lift the rear portion of the truss 310 to separate the truss 310 from the transverse movement truck 330 and to use the hoist rope of one lifting winch 320 The separated lateral movement bogie 330 is rotated so as to extend in the longitudinal direction between the mold trusses 310 and then moved forward so as to be placed on the upper surface of the girder 220. After the lifting winch 320 is returned to its original position Moving the transverse rail (340) forward and seating it on the upper surface of the girder (220);
Dismounting the forwards winch 320 moved forward by dismounting it to a work site under a front bridge bridge of an adjacent coping portion;
Re-installing the lateral rail (340) and the transverse moving truck (330) placed on the upper surface of the girder with the lifting device (400) in the front coping portion; And
And moving the cast truss by one lifting device to the re-installed transverse moving bogie (330). 3. The method according to claim 1 or 2,
The lifting device 400 is configured to move the mold truss fixedly set on the work member B and positioned within the working radius to the front coping portion so that the mold truss can move forward from the adjacent coping portion forward, A bridge construction method using a visa stock beam launcher for pushing forward by using a visor stock beam launcher. The method according to claim 1,
After the step (e), the visor stock beam launcher 300 completes the bridge by placing the beam launcher 300 on the work site B using the lifting device 400 and installing the slab on the upper part of the girder, A bridge construction method using. The method according to claim 1,
The hoisting winch 320 is provided with a winch support base 321 on which a moving roller is formed and a moving roller is integrally formed under the winch 322 so that the winch 322 can be moved laterally from the upper surface of the winch support base 321 A method of constructing a bridge using a visa stock beam launcher to be formed.

Images