KR100382320B1 - Bridge construction apparatus - Google Patents

Abstract

The present invention relates to an apparatus for constructing a bridge by the PSM method, wherein a rear cross beam is disposed on an upper portion of a top segment, while both ends of the rear cross beam are coupled with a side truss at the bottom of the upper segment, and a front cross beam. It is mounted on the central truss and at the same time adopts a structure to install a load distribution member on the upper surface to ensure structural stability and solve the cost problem due to work delay.

Description

Bridge construction device {BRIDGE CONSTRUCTION APPARATUS}

The present invention relates to a bridge construction device, and in particular, to complement the strengths and weaknesses of the upper and lower types of the PSM (Precast Segmental Method) method mutually to secure the safety of the bridge pier, the bridge structure that can shorten the air while reducing costs It relates to a construction device.

The PSM method is to precisely manufacture the top plate segment, which is the upper structure of the bridge divided into a certain length, with uniform quality at the manufacturing site, and then align it on the temporary truss using various construction equipment at the construction site, then join and tension it. It is a construction method to complete the bridge.

The characteristics of the PSM method can be divided into easy-to-handle dimensions and lightweight segments, so that large structures and complex shaped structures can be constructed relatively easily. Not only is it easy to manufacture the top plate segment continuously, it is possible to manpower management and formwork only, and the top plate segment can be carried out in parallel with the lower construction, it is possible to shorten the air compared to the field casting method.

In addition, since the concrete reaches a significant age during the construction of the superstructure, less plastic deformation occurs due to creep, dry shrinkage, etc. occurring after the construction, and thus, the amount of reduction in prestress is reduced, which is advantageous.

The upper plate segment manufacturing method is a wide jointing type (Wide Joing Type), in which the segments are manufactured separately, and the joints are fully hardened in the range of 0.15 to 1.0m, and then prestressed to join the joints. There is a Match-Cast Joint Type that allows perfect joining at the joint surface by casting the next segment by using the Counter Mold.The Mast Cast Joint Method uses the Long Line method and There is a short line method.

There are several methods of hypothesis such as FCM method, SPAN BY SPAN method and progressive method, but the method to be mentioned in the present invention is a SPAN BY SPAN method, a movable hypothetical truss between the piers and piers This is done by installing and arranging precast segments on the prefabricated segments and applying stressing to connect them to adjacent spaces.

1 schematically shows an upper type of a conventional PSM method.

The upper type PSM method installs the lower beams 4 and 4 'in two adjacent piers 2 and 2' and installs a temporary truss 6 across the lower beams 4 and 4 '. The bridge is constructed in such a way that the upper plate segment S is connected to the crane 8 installed on the temporary truss 6.

2 to 4 are schematic views showing the lower type of the conventional PSM method.

The lower type PSM method installs brackets 12 and 12 'on the side of each pier 10, 10' and then installs a temporary truss 14 between the pier 10 and the pier 10 '. The conveyed upper plate segment S is lifted up by the crane 16 and continues in succession to construct a bridge. Joining of the upper plate segment (S) terminates the alignment of the upper plate segment (S) by using a epoxy and by stretching a steel wire passing through the center of the upper plate segment (S) while increasing the resistance to the tensile stress of the bonding surface.

As shown in FIG. 4, the cross beam 18 is hinged on the pier 10 to be rotated and opened and closed, and when the temporary truss 14 is moved, the cross beam 18 is opened to rotate after dismantling the fixing bracket 20. After making the hypothesis truss 14 is advanced.

However, in the case of the PSM method of the upper type described above, since the temporary equipment is installed on the upper plate segment and the segment is suspended, the work is unstable in the place affected by the wind and there is concern about air delay. In addition, there is a problem that the load is concentrated on the upper part as the temporary equipment is made on the completed top plate.

On the other hand, in the case of the lower PSM method, the load of the central truss, side truss and top segment is concentrated outside the pier through the bracket, and the pier safety is threatened. In the case of the vessel is required to not only increase the construction cost, but also has a problem that the air delay due to such related work.

The present invention devised to solve such problems is an object of the present invention to provide a bridge construction apparatus that can shorten the air while ensuring the safety of the lower bridge pier and cost.

Bridge construction apparatus of the present invention to achieve the above object is a support wood disposed on the upper surface of the upper segment; A central truss, which is installed between the piers and the piers on the front and rear sides, and has a top plate segment disposed on both sides, and has a transfer truss that can move back and forth; A hydraulic jack installed between the central truss and the pier to raise and lower the central truss; A rear cross beam mounted transversely to the rear side of the central truss and mounted on the support neck; A crane fixed to the rear cross beam to pick up the upper segment and align it to the central cross; A front cross beam installed transversely from left to right on the front side of the central truss and detachably installed on the upper plate segment; It is installed on the upper side of the front cross beam, and one side is fixed to the upper side of the front cross beam corresponding to the junction point of the side truss and the front cross beam and the two sides constituting the top plate segment, and the other side is gathered into one. A load distribution support member composed of a plurality of support stands erected; Side trusses provided at both ends of the rear cross beam and the front cross beam in front and rear directions; And a transfer rail installed in the central truss and the side truss and transported to the front side when the upper plate segment pulled from the crane is seated on the central truss.

Here, it is preferable that both ends of the rear cross beam are formed to surround the edge of the upper plate segment while both ends are coupled to the side truss.

In particular, when the bridge is built to one side of the left and right sides, it is preferable that a brace is installed between the side truss and the pier to prevent contact between the side truss and the pier.

In addition, it is preferable that the stopper is fixed to the upper surface of the hydraulic jack in order to prevent the upper plate segment from sliding when the bridge is inclined forward and backward.

1 is a side view schematically showing the configuration of a bridge construction apparatus of the conventional upper type,

Figure 2 is a side view schematically showing the configuration of a bridge construction apparatus of the conventional lower type,

3 is a front view schematically showing the configuration of FIG.

4 is a plan view schematically illustrating a part of the configuration of FIG. 2;

5 is a side view showing the configuration of a bridge construction apparatus according to the present invention;

6 is a front view schematically showing a rear side portion of the bridge construction apparatus according to the present invention;

7 is a front view schematically showing a front side portion of the bridge construction apparatus according to the present invention;

8 is a plan view showing a bridge construction apparatus according to the present invention,

9 is a plan view showing the state of the front side cross beam when the bridge construction apparatus according to the present invention moves to the next span,

10 is a view showing the contact portion of the side truss and the pier when the bridge construction device according to the present invention is located on the inclined portion of the bridge,

FIG. 11 illustrates an apparatus for preventing the top plate segment related to the present invention from slipping at the front and rear slope points of a bridge. FIG.

<< Explanation of symbols for main part of drawing >>

S..Top Segment

50, 50 '.. Pier 100 .. Central truss

101..Transfer Truss 102..Side Truss

104. Rear cross beam 106. Crane

108. Transfer rail 110. Hydraulic jack

112. Front cross beam 114. Fixture

116. Load distribution members

120. Brace 122. Stopper

Hereinafter, a bridge construction apparatus according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Prior to the description of the present invention, the manufacturing process of the top plate segment is introduced, and the segments are manufactured in one place at the same place by using the Long Line method for collectively manufacturing the entire span of the bridge and the previously manufactured segments as fixed molds. There are two types of short line methods used in the present invention.

The fabrication process is a series of processes from rebar processing, rebar fabrication, segment manufacturing to concrete placement and curing. After rebar cutting and processing, the rebar assembly and seed pipe are installed on the jig. After installing the floor formwork and the outer formwork, transport and install the already assembled rebar cage, and install the inner frame.

Subsequently, the concrete is poured between the reinforcing cage and the inner frame and then cured and dismantled.

These segments are roughly ' It is formed in a shape, and is disposed between the central truss and the side truss described later in the two-row longitudinal direction.

Figure 5 is a side view showing the configuration of the bridge construction apparatus according to the present invention, Figure 6 is a front view schematically showing a rear side portion of the bridge construction apparatus, Figure 7 schematically shows a front side portion of the bridge construction apparatus. 8 is a plan view illustrating a bridge construction apparatus, and FIG. 9 is a plan view illustrating a state of the front side cross beam when the bridge construction apparatus moves to the next span.

As shown in Figures 5 to 8, the bridge construction apparatus of the present invention after installing the central truss 100 and the side truss 102, which is a launching truss (Launching Truss) in the span (between pier and piers), the rear The crane 106 installed on the side cross beam 104 seats the upper plate segment S between the central truss 100 and the side truss 102 and sequentially transfers toward the front side using the transfer rail 108. It is used when making, and the upper plate segments (S) aligned after being transferred are bonded by epoxy resin and then stretched and fixed with steel wire.

The central truss 100 is installed between the piers 50 and the piers 50 'of the front and back sides, which are one span, and the transfer truss 101 which can move back and forth is built in the central truss 100 so that When the work is finished, the transport truss 101 is drawn out and moved to the next pier, and then the central truss 100 and the side truss 102 are transported together in the next span. The side truss 102 is installed at both sides of the central truss 100 at predetermined intervals.

Transfer rails 108 are installed on the upper surfaces of the central truss 100 and the side truss 102 so that the upper plate segments S pulled from the crane 106 are transferred to the front side when they are seated on the central truss 100.

A hydraulic jack 110 is installed between the central truss 100 and the piers 50 and 50 'to raise and lower the central truss 100, and then the central truss 100 is lowered after the construction of the upper plate segment S is completed. It is possible to transfer to the next pier.

In addition, the front cross beam 112 and the rear cross beam 104 are installed at the front and rear sides of the central truss 100 and the side truss 102, which are upper portions of the pier 50, 50 ', It is installed in the direction orthogonal to the truss 100.

The front cross beam 112 supports the front end of the side truss 102 in a state where it is mounted on the central truss 100, and only when the central truss 100 and the side truss 102 move, as shown in FIG. 9. As described above, the front side cross beam 112 is fixed by the fastener 114 of the completed upper plate segment S. As shown in FIG.

A load distribution support member 116 composed of a plurality of supports 117 is installed on the upper side of the front cross beam 112, but one side of the support 117 is formed of the side truss 102 and the front side cross beam 112. It is fixedly supported on the upper side of the front cross beam 112 corresponding to the point where the two sides constituting the connecting point and the upper plate segment (S), the other side of the support 117 is gathered into one and looks like an umbrella It is made into a shape.

The rear side cross beam 104 is installed on the upper plate segment S, and both ends of the rear side cross beam 104 surround the side surface of the upper plate segment S, and both ends are disposed under the upper plate segment S. It is fixed to the side truss 102 in the positioned state.

On the upper surface of the rear side cross beam 104 and the upper plate segment (S) is supported a rear side cross beam 104 in which a support neck 118 made of a metal ball is disposed, and a crane on the rear side cross beam 104. A 106 is installed to pick up the top plate segment S and align it to the central cross 100.

On the other hand, as shown in FIG. 10, in the span in which the left and right sides of the bridge are inclined, contact may occur between the pier 50 and the side truss 102, which may damage the head of the pier. Therefore, in the present invention, the brace 120 is installed between the pier 50 and the side truss 102.

In addition, as shown in FIG. 11, the stopper 122 is disposed on the upper surface of the hydraulic jack 110 in order to prevent the upper plate segment S aligned with the central truss 100 from sliding under load in a span in which the front and rear of the bridge are inclined. ) Is fixed to prevent the lower surface of the upper plate segment S from sliding by friction with the stopper.

The effect together with the operation of the bridge construction apparatus according to the present invention configured as described above will be described.

First, the crane plate 106 lifts the upper plate segment S transferred from the segment fabrication shop in the state where the central truss 100 and the side truss 102 are seated between the pier 50 and the pier 50 '. Both bottom surface edges of the upper plate segment S are disposed to be seated on the central truss 100 and the side truss 102.

The upper plate segment S is then conveyed toward the front cross beam 112 by the conveying rail 108, and then the other upper plate segments are also sequentially aligned in the manner described above.

Then, the upper plate segment (S) is bonded by epoxy resin to increase the resistance to the tensile stress of the bonding surface.

Subsequently, after passing the steel wire into the duct of the aligned upper plate segment S, both ends of the steel wire are fixed and stretched to completely align the upper plate segment S.

When one span is completed through the above operation, the front cross beam 112 is fixed to the fixture 114 as shown in FIG. 9, and then the connection portion between the side truss 102 and the front cross beam 112 is fixed. After dismantling, the transfer truss 101 is advanced to the next pier to be fixed to the pier, and then the fixing part 114 is released.

Subsequently, when the central truss 100 is lowered by operating the hydraulic jack 110 and then the central truss 100 and the side truss 102 are transferred, the front and rear cross beams 104 and 112 and the rest of the crane are towed. .

When the towing is finished, the front cross beam 112 and the side truss 102 are connected.

In the above working process, the front cross beam 112 is fixed to the completed upper plate segment S so that only the transport truss needs to be advanced when the transport truss 101 is transported. The risk of overturning due to changes in the center of gravity due to

In addition, the fixture 114 proposed in the present invention reduces the risk of disaster occurrence due to the joining and dismantling between the conventional front cross beam 112 and the central truss 100 and the side truss 102 and the cost of equipment input do.

In addition, the rear cross beam 104 is positioned above the upper plate segment S, and both ends of the rear cross beam 104 under load are positioned under the upper plate segment S, and then the side truss 102 is placed on the side truss 102. By combining, the load of the side truss 102 is distributed to the center of the piers and the top plate to ensure the stability of the lower structure.

Furthermore, the front cross beam 112 is also mounted on the top of the central truss 100 and the load distribution member 116 is installed on the top of the front cross beam 112 to load the central truss 102. 100) and the center of the pier to ensure structural stability.

As described above, the preferred embodiment of the present invention substantially solves the conventional problems.

In other words, similar to the lower type of the PSM method, the temporary equipment is installed on the upper part of the upper segment to ensure stability during the upper segment alignment, while both ends of the rear cross beam are coupled with the side truss while the lower end of the upper cross segment is located at the lower part of the upper segment. It is also structurally stable.

In addition, since the bracket is not installed in the pier, there is an effect of being freed from the risk of disaster occurrence due to the installation / removal of the bracket and the increase in cost and the safety threat of the pier.

In addition, the risk of disaster caused by joining and dismantling between the side truss and the front cross beam and the cost of equipment input are reduced.

Claims (4)

In the bridge construction apparatus used in the PSM method of constructing a bridge by successively lattice-shaped plate segment between the bridge piers, A support neck disposed on an upper surface of the upper segment; A central truss installed between the piers and the piers on the front and rear sides, and having the upper plate segments disposed on both sides, and having a transfer truss that can move back and forth; A hydraulic jack installed between the central truss and the piers to move up and down the central truss; A rear cross beam which is installed on the rear side of the central truss and crosses the left and right sides and is mounted on the support neck; A crane fixed to the rear cross beam to pick up the top plate segment and align it to the central cross; A front cross beam installed transversely from left to right on the front side of the central truss and detachably installed on the upper plate segment; It is installed on the upper side of the front side cross beam, and one side is fixed to the upper side of the front side cross beam corresponding to the junction point of the side truss and the front side cross beam and the two surfaces constituting the upper plate segment and the other side. A load distribution support member composed of a plurality of support bars erected together; Side trusses which are installed in both front and rear directions at both ends of the rear cross beam and the front cross beam; And Bridge construction apparatus is installed in the central truss and the side truss and comprises a transfer rail for transporting the upper plate segment to the front side when seated on the central truss is pulled from the crane. The bridge construction apparatus according to claim 1, wherein both ends of the rear cross beam are formed to surround an edge of the upper segment, while both ends are coupled to the side truss. The brace according to any one of claims 1 to 3, wherein a brace between the side truss and the pier to prevent contact between the side truss and the pier when the bridge is constructed inclined to either side of the right and left sides. Bridge construction apparatus characterized in that the installation. 4. The bridge construction apparatus according to claim 3, wherein a stopper is fixed to an upper surface of the hydraulic jack to prevent the upper segment from sliding when the bridge is inclined forward and backward.