KR100966144B1 - Rahmen bridge construction method with abutment socket and tendon - Google Patents

Abstract

PURPOSE: A construction method of a rahmen bridge using a socket and an abutment horizontal tendon is provided to improve construction performance by easily and strongly coupling an abutment and both ends of a girder. CONSTITUTION: A construction method of a rahmen bridge using a socket and an abutment horizontal tendon is as follows. Abutments(100) are installed to be separated from each other in a longitudinal direction. Both ends of girders(200) are inserted into sockets formed in the top of the abutments. A form is previously installed in the top of the girders and the abutments. A slab is integrally formed in the form.

Description

RAHMEN BRIDGE CONSTRUCTION METHOD WITH ABUTMENT SOCKET AND TENDON}

The present invention relates to a ramen bridge construction method using an alternating socket portion and a transverse tension member. More specifically, it relates to a ramen bridge construction method for installing a girder between shifts, constructing a slab on the girder, and constructing a bridge by stiffening the shift and the girder.

Figure 1a shows an example of a conventional ramen bridge 10 in a perspective view.

The ramen bridge 10 is a slab formed integrally with the bottom plate 13 and the bottom plate wall portion 12 and the upper surface of both ends of the bottom plate wall portion 12 are installed so as to extend in a vertical direction to the bottom plate 13 and the bottom plate central upper surface ( 11).

The bottom plate 13 is made of a reinforced concrete structure of a rectangular parallelepiped form using the formwork to dig the ground, and also the bottom plate portion 12 is also made of a reinforced concrete structure having a predetermined height (H) using the formwork. .

Furthermore, the slab 11 is also installed between the bottom plate wall portion 12, the copper bar on the ground and the formwork is installed on the copper bar to be constructed as a reinforced concrete structure.

The slab 11 has a predetermined thickness (t) as shown in the AA cross-sectional view and its cross-sectional shape extends in the longitudinal direction and the transverse direction to have a predetermined length (L) and thickness (t) in the longitudinal direction. It can be seen that it is formed as a rectangular member as a whole as a form.

At this time, in the case of the slab formwork to form a haunche 20 to be inclined downward from the inner end of the slab to extend to the upper connection portion of the point wall portion, which is to generate a bending parent (-M2) in the haunche 20 Therefore, to secure the rigidity for this.

The haunch portion is formed to be inclined in a straight shape to be formed to a predetermined thickness.

Such a ramen bridge 10 can be said to be an efficient and economical bridge in a relatively short span (approximately 10-15 m) since construction is easy because the slab is directly installed without using a girder for bridges.

At this time, in order to construct the ramen bridge in the long span, the extension length (longitudinal direction) of the slab should be made larger, and as the extension length of the slab becomes longer, the weight of the slab becomes larger and accordingly, the thickness of the cross section needs to be increased. have.

However, as the thickness of the slab increases, the geometry of the bridge is reduced, so there is a problem in that it is impossible to construct a ramen bridge in the long time when the geometry of the geometry is restricted.

In addition, even if there is no restriction on the mold space, the slab weight increases as the thickness of the slab increases, so if the slab and bottom wall parts and the bottom plate need to be designed to withstand such weight, they must be manufactured to an excessive size. There was a problem that there is no choice but to be very vulnerable to aesthetics or usability.

Recently, the need for the development of technology for the construction of such a ramen bridge (10) in the long distance (about 30m) and the necessity of enhancing the constructability has emerged, the ramen bridge that is constructed in a precast method has been introduced.

That is, the precast longitudinal unit 30 is installed on the upper surface of the wall unit 20 installed on the base 10 to be in contact with each other in the transverse direction as shown in FIGS. The end of the directional unit 30 is constructed in such a way that the steel rods drawn upwards from the upper surface of the wall unit 20 penetrate upwards and downwards so that the ends of each girder are rigidly fastened to the alternate 20 by the fastening nuts. It can be seen that in the longitudinal direction of the cast longitudinal unit 30, the longitudinal tension member is further installed to allow the prestress to be introduced after the tension is fixed to both end faces of the girder.

However, in order to harden the precast longitudinal unit 30 with the wall unit 20 and the steel rods, the through-holes formed in the precast longitudinal unit 30 are formed in the wall unit 20 so as to extend upward in advance. It should be set relatively precisely in correspondence with the position, but when working in the field, there are a lot of cases where the position of each other does not fit, there is a problem that the construction can be reduced.

In addition, it is common that the precast longitudinal unit 30 introduces a gradient for drainage in the transverse direction. However, there is a problem that the operation of forming the transverse gradient in the wall unit 20 is also not easy.

Furthermore, when the precast longitudinal unit 30 is manufactured to have a long span in the longitudinal direction, there is a problem that resistance to buckling and torsion is inevitably lowered when the prestress is introduced and constructed by the longitudinal tension member.

Accordingly, the present invention allows both ends of the alternating and girder to be more easily tightened, so that the construction performance is excellent and the lateral gradient of the girder is also easily secured, but the resistance to buckling and torsion is possible even when using a long span girder. The technical problem to solve the provision of the construction method of the ramen bridge using the alternating socket portion and the transverse tension material that can ensure a sufficient amount.

In order to achieve the above object, the present invention is configured as follows.

First, both ends of the girder are alternately wrapped and restrained by forming a plurality of socketed out socket parts alternately transversely so that both ends of the girder can be inserted from above.

The girder was made in long spans so that even if the prestress was introduced by the longitudinal tension members, it was able to more reliably resist warpage and / or buckling in the girder.

In addition, since both ends of the girder are installed to be alternately inserted, the setting operation of the girder is very easy.

Secondly, the hardening of the shift and the girder is to be made by the transverse tension member penetrating the shift and the girder in the transverse direction to enhance the efficiency and convenience of the hardening work.

Third, both ends of the girder can be formed in the upper part or the girder in the state in which the whole or part is inserted into the socket portion to increase the unity with the slab and adjust the height of the mold height.

Fourth, the reinforcement plate is installed to be further covered on the upper surface of the girder of both ends, but the reinforcement plate is fixed by a fixture including an anchor bolt to the alternating so that both ends of the girder can be reinforced.

According to the present invention, it is very advantageous in workability, and it is possible to construct a ramen bridge between long spans efficiently, thereby enabling economic bridge construction.

An embodiment of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Accordingly, such improvements and modifications are within the scope of the present invention as long as they are obvious to those skilled in the art.

BRIEF DESCRIPTION OF THE DRAWINGS In order to describe the present invention more clearly and easily, the following describes the best embodiments of the present invention in detail with reference to the accompanying drawings. Is not limited to the embodiments described below.

Figures 2a to 2c shows the steps of the ramen bridge construction method using the alternating socket portion and the transverse tension material according to the present invention.

First, as shown in FIG. 2a, the shift 100 is constructed at positions spaced apart from each other in the longitudinal direction.

The shift 100 may be constructed such that the foundation 110, which is constructed on the ground, the body portion 120 extending upwards on the upper surface of the foundation 110 and the alternating upper portion 130 formed on the upper portion of the body portion are included. It can also be called a wall part. The shift 100 refers to a structure for supporting the girders at the starting point and the end point in the general ramen construction, for example, may be referred to as the wall portion.

At this time, the alternating upper portion 130 is a spherical shape extending in the lateral direction, and the socket portion 131 is opened to the inner side surface of the alternating opening so that both ends of the girder 200 can be inserted from above to the inner upper surface A. ) To be formed a plurality of spaced apart in the transverse direction, the separation distance depends on the installation interval of the girder 200 to be described later.

The size and cross-sectional shape is generally formed in a rectangular parallelepiped shape, but is not limited thereto, and the size and the cross-sectional shape may be such that the end of the girder 200 can be inserted, and the depth of the girder 200 can be inserted. This is done.

It is only necessary that the ends of the girder are formed so as to be open to the inner side of the alternating block so as to be inserted and supported.

Further, in the block-out socket portion 131 of the alternating upper portion 130, the transverse tension hole 300 may penetrate the transverse tension member 300 which also penetrates the end portion of the girder 200, which will be described later, in the transverse direction. 132 is preformed.

At this time, the alternating upper portion 130 is installed so that a gradient is formed in the transverse direction.

Accordingly, the blocked-out socket part 131 may also be naturally set to correspond to the horizontal gradient, and may be formed on the girder 200 and the girder to be described below inserted into the blocked-out socket part 131. The slab 400 to be naturally also has a horizontal gradient.

As such, when the shift 100 is first installed, the space to be filled in the entire rear portion of the shift can be backfilled in the initial stage of the bridge construction, and thus, there is an advantage in that the air shortening is very advantageous.

As such, when the construction of the shift 100 is completed, both ends of the girder 200 are installed to be inserted into the blocked-out socket part 131 of the target part 130 as shown in FIG. 2B.

The girder 200 may basically be a PSC girder but may be other conventional girders (such as PF composite girders), and both ends of these girders are lowered downwards from above the blocked-out socket part 131 and eventually alternated. Both ends are inserted and supported in the block-out socket part 131 of the upper part 130.

In addition, end through holes 210 corresponding to the transverse through holes 132 may also be formed at both ends of the girder 200 in the transverse direction so that the transverse tension member 300 may pass through the alternating upper portion 130. Done.

As such, when the girder 200 is installed to support both ends of the alternating upper portion 130, the girder 200 is primarily integrated with the alternating upper portion 130, which is connected to the blocked-out socket part 131. By filling the socket portion filler 220 including the mortar in the interior space by filling the internal space by the socket portion 131 is blocked out.

At this time, the inner side of the socket portion 131 and the inner side of both ends of the girder 200 which are integrally integrated with each other by the socket portion filler 220 are irregularities for improving coupling capability with the socket portion filler 220. It is preferred that 240 be further formed.

Furthermore, both end portions of the inner side of the socket portion 131 and the girder 200 may not be blocked by the socket portion filler 220 between the transverse transverse through holes 132 and the end portion of the girder 200. It is possible to further form a connector not shown between the outer surface.

Accordingly, both ends of the girder 200 and the socket-out socket 131 blocked by the socket part filler 220 are integrated with each other, and the upper part 130 of the girder 200 is wrapped around the ends of the girder 200 to further restrain the girder. It can be seen that it is possible to reduce the effect on the distortion and / or buckling that occurs, thereby setting the position of the girder 200 can be omitted to install the cross beam between the girder abdomen.

Since the role of the cross beam serves to connect the girder 200 installed in parallel to each other in the lateral direction, in the present invention, the socket part filler 220 including the blocked-out socket part 131 and mortar is girder 200. This is because it is possible to replace this crossbeam role by enclosing and constraining both ends.

Next, for example, the transverse tension member 300, which is a steel bar or PC strand, can penetrate the transverse transverse through hole 132 and the end through hole 210 of the girder 200 through the socket part 131. .

When both ends of the through-hole 132 and the end through-hole 210 of the girder 200 are fixed at both sides of the shift through the fastening nut and the fixing fixture, the two ends are fixed to both side ends. As can be seen that the girder 200 may be rigidly installed in the shift.

Next, as shown in FIG. 2C, the usual molds and the like are pre-installed on the subject 130 and the upper part of the girder, and the slab 400 is integrally formed, thereby enabling the final ramen bridge construction.

Of course, the back of the shift is made of the backfill construction and the connection slab will be constructed separately so that the construction will be continuous with the slab 400.

At this time, after the slab 400 is first formed, the transverse tension member 300, which is a steel bar or PC strand, alternates the transverse through-hole 132 and the end through-hole 210 of the girder 200 to the socket 131. In this case, it is possible to introduce compression prestress in the transverse direction while constraining both ends of the girder 200 together with the slab 400.

In addition, as shown in FIG. 3, both ends of the girder 200 are inserted into the socket portion 131, not the overall height, so that both ends of the girder are inserted into the socket portion so that both ends of the girder protrude upward from the socket portion. .

At this time, both ends of the girder to ensure the internal reinforcement 230 is connected to the alternating internal reinforcement 133 to ensure the integrity, to form a slab 400 so that the shift, girder and the slab can be integrated with each other. do.

Furthermore, in the case of the transverse tension member 300 which is a steel bar or PC strand, it passes through the alternating transverse through holes 132 and the end through holes 210 of the girder 200 and of the girder 200 which protrudes and extends. After the end is set with the slab 400, although not shown, it may be allowed to settle after tension at the slab side end after slab formation.

4 and 5 are installed in such a way that the reinforcement plate 500 is further covered on the upper surface of both ends of the girders 200 fixedly installed on the target portion 130, the reinforcement plate 500 is anchor bolt to the target portion surface It is shown to be fixed by the fixing fixture 600, including both ends of the girder to be reinforced.

This is because the reinforcement plate 500 to more effectively respond to the bending parents generated at both ends of the girder 200.

The reinforcement plate 500 may be formed of an upper horizontal plate 510 and a reinforcing plate 520 having a plate shape protruding upward on the upper horizontal plate 510, and the fixing unit being an anchor bolt on the upper horizontal plate. 600 may be penetrated downward to be fixed to the alternating upper portion (130).

4 shows that the reinforcement plate 500 is alternated by the fixture 600 on the upper end of the girder 200 in the state where the end of the girder 200 is inserted over the entire height in the socket portion 131 of the alternate upper surface. It is shown in a fixed state on the upper surface (130).

In this case, it can be seen that the fixture 600 is installed to be embedded in the alternating upper surface 130 from the reinforcement plate 500.

5 is a reinforcing plate 500 is fixed to the upper surface of the end of the girder 200 in a state in which the girder 200 is inserted into the socket so as to protrude to the upper portion of the socket portion 131 of the alternating upper surface 130. By 600 is shown a state fixed to the alternating upper surface 130.

In this case, it can be seen that the fixture 600 is installed so as to be embedded in the alternating upper surface 130 from the reinforcement plate 500. In this case, the fixture 600 is shifted from the reinforcement plate 500 to the alternating upper surface 130. It can be seen that the landfill is installed.

6 is a reinforcing plate 500 is fixed to the upper end surface of the girder 200 in a state in which the girder 200 is inserted into the socket so as to protrude upwardly from the socket portion 131 of the alternating upper surface 130. It is to be fixed to the alternating upper surface 130 by 600, in particular, it can be seen that the fixture 600 does not extend to the alternating upper surface 130 and can be embedded and fixed when the slab 400 is formed. .

1A, 1B, 1C and 1D show examples of a conventional ramen bridge.

Figures 2a, 2b and 2c schematically show the construction of the ramen bridge construction using the alternating socket portion and the transverse tension material according to the present invention.

3 shows another installation example of the shift of the present invention.

4, 5 and 6 show installation examples of the reinforcing plate according to the present invention.

<Description of the symbols for the main parts of the drawings>

100: Shift 110: Foundation

120: body 130: the subject surface

131: socket part 200: girder

210: end through hole 220: socket filler

300: transverse tension material

400: slab

500: reinforcement plate 510: upper horizontal plate

520: reinforcement plate 600: fixture

Claims (5)

delete delete delete delete In the ramen bridge construction method of installing and forming the slab 400 after installing the girder 200 between the two shifts 100, The shift is open to the inner side of the shift so that the end portion of the girder can be inserted from above so that the block-out socket portion 131 is formed in the alternating transverse direction, The girder 200 is installed between the socket portions 131 facing each other, but both ends of the girder are inserted into the block-out portion so as to be supported by the bottom of the socket portion. By lateral tension member 300 installed in the transverse direction so as to penetrate both ends of the girder and the end of the girder and alternating with each other, Forming a slab 400 on the girder; Both ends of the girder inserted into the socket portion 131 may be inserted into the socket portion so that the entire height is inserted into the socket portion, or both ends of the girder protrude upwardly from the socket portion, but the amount of the protruding girder At the end, further reinforcing bars are formed to be connected to the inner reinforcing bars of the girder to be integrated with the slab concrete that is poured during slab formation. Both ends of the girder are installed to further cover the reinforcement plate 500, the reinforcement plate is secured by the fastener 600 including the anchor bolt to the alternating reinforcement both ends of the girder, The reinforcement plate 500 is configured to include an upper horizontal plate 510 and a shear reinforcing plate 530 in the form of a plate on the upper surface of the upper horizontal plate 510, the reinforcement plate 500 is a fixture 600 Ramen bridge construction method using the alternating socket portion and the transverse tension material to be fixed to extend to the alternate upper surface 130 or the slab 400 by the).

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