KR20200072986A - Pseudo jointless bridge construction made of steel plate girder with overhanged end widen and extended flange composed of concrete block - Google Patents

Abstract

The present invention relates to a steel girder having an end-expanded protruding flange and a support concrete block, which forms an end-expanded protruding flange to protrude from both ends of a steel girder in a longitudinal direction by a predetermined length, and forms a support concrete block at an upper portion to allow the support concrete block to further protrude to the outside of a bridge support with respect to a longitudinal direction of a girder, starting from the bridge support for mounting the girder when the girder is mounted on an alternating structure such that installation of an elastic joint device is not required and self-weight of a protruding expanding part and a load of a vehicle wheel are not applied to a parapet wall; and to a method for constructing a jointless bridge using the same. According to an embodiment of the present invention, the steel girder comprises: an H-shaped body for forming an H-shaped cross section by including upper and lower flanges and a web for connecting central portions of the upper and lower flanges in a width direction; an end-expanded protruding flange bonded to protrude by a predetermined length to the outside from both ends of the H-shape body in a longitudinal direction by including a support part of a horizontal plate shape formed to be greater than the width of the upper flange by a predetermined width and a side surface part formed on an upper portion of the support part; and a support concrete block formed by a predetermined thickness only on the entire width or a partial width of an upper surface of the end-expanded protruding flange.

Description

Pseudo jointless bridge construction made of steel plate girder with overhanged end widen and extended flange composed of concrete block}

The present invention relates to a steel girder having an end extension projecting flange and a supporting concrete block, and a method for constructing a jointless bridge using the same, and more specifically, an end extension projecting flange is constructed so as to protrude a certain length from both ends in the longitudinal direction of the steel girder. When the girder is mounted on the alternating structure, the supporting concrete block is projected outward from the bridge bearing in the longitudinal direction of the girder starting from the bridge bearing that mounts the girder. In addition, the present invention relates to a steel girder having an end extension protrusion flange and a support concrete block to prevent the weight of the protrusion extension part and the wheel load of the vehicle from acting on the chest wall, and a method for constructing a jointless bridge using the same.

In general, a bridge using a telescopic joint device, as shown in FIG. 9, supports the bridge structure 92 at the start and end points of the bridge and a steel or concrete girder 91 mounted therebetween (93). A short span bridge where the bridge section is completed by placing the concrete on top of it and pouring concrete to form a bottom plate (911), and a continuous span in which girders are repeatedly arranged in the longitudinal direction by placing one or more bridge structures between the two alternate shift structures. There is a bridge.

At this time, at the start and end points of the bridge section, a telescopic joint device 94 is installed to disconnect the bridge section in the transverse direction parallel to the alternating structure 92 in order to accommodate the expansion and contraction due to the external environment. To accommodate the horizontal displacement of the superstructure due to temperature changes, creep, etc., and continuously form road sections formed in the earthwork section and road sections formed in the earthwork section, ensuring the driving performance of the passing vehicle, and the separation between the shifting structure and the girder and the bottom plate. Therefore, it is an essential accessory in the bridge section to prevent problems in temperature changes.

However, as shown, the expansion joint device 94 installed at the starting point and end point of the bridge section shows the aging of equipment according to the outside environment (breakage, corrosion), loss of function due to infiltration of contaminants, deterioration by calcium chloride for snow removal, etc. As a result, periodic replacement work or maintenance and reinforcement occurs regularly. If the vehicle passes through the road of the bridge section from the road of the earthwork section on the short span bridge, the process is as follows.

Earthwork section (connected part of bridge) --> Upper side of chest wall (921) of alternating structure (92) --> Stretch joint (94) --> Girder (91), Bottom plate (911) --> Stretch joint ( 94) --> Top of chest wall (921) of alternating structure (92) --> Earthwork section (connected part of bridge)

The expansion and contraction device 94 is an auxiliary device that separates the chest wall 921 and the bridge section of the alternating structure 92 after passing through the earthwork section, but the top and bottom plates of the chest wall 921, which is an alternating structure due to the long-term settlement of the earthwork section. A step difference between (911) occurs, and the sagging of the girder due to the overloading of the passing vehicle during sharing spreads to the rotational displacement at the end point and the step occurs when the top of the chest wall (921) and the bottom plate (911), the girder (91) , Inducing a large impact load on the bridge bearing (93) deteriorates the performance of the structure and the fatigue performance, in particular, there is a problem that noise is generated when passing a vehicle.

As a background technology of the present invention, there is Patent Registration No. 0894542 "No joint bridge" (Patent Document 1). In the background art,'the mold forming the upper structure of the bridge and the floor slab undergo elongation and contraction deformation repeatedly according to temperature changes due to one-cross and/or cross-link, and in this case, if the elastic deformation of the floor slab is forcibly restrained, Since it causes excessive shear deformation in the upper structure of the alternation, in order to prevent the shear deformation as described above, the relative displacement transmitted to the extended slab integrally connected to the floor slab during expansion and contraction of the mold and the floor slab according to temperature change is forcibly performed. A non-joint bridge capable of effectively improving the durability and safety of the bridge and realizing the continuity of pavement of the bridge's structure by effectively introducing a sliding means to convert the slide into a sliding movement without restraint. To suggest.

However, the background technique has a problem in that construction is difficult, such as the need to separately install the elastic joint and the sliding means, and there is a problem in that the locking portion is exposed to the upper portion and the step is not solved and the impact is transmitted to the locking portion as it moves.

Patent registration #0894542 "No joint bridge"

The present invention is to solve the problems as described above, by constructing an end-extended protruding flange so as to protrude a certain length from both ends in the longitudinal direction of the steel girder and to form a supporting concrete block on the top, the girder is mounted on the alternating structure. Starting from the bridge support, the concrete block on the girder is projected to the outside of the bridge support in the longitudinal direction, so there is no need to install a new expansion joint and the weight of the end extension projecting flange and the supporting concrete block and the weight of the vehicle wheels on the chest wall. And prevents deterioration of the high-damage chest wall, bridge support, and floor plate in the concrete alternating structure caused by water leakage into the expansion joint, thus increasing the endurance life of the bridge. It is possible to increase the durability of the vehicle entering from the bridge section in the earthwork section, as well as to improve the durability of fatigue of the girder or the bottom plate due to shock and vibration due to the absence of a telescopic joint device, and to be newly constructed during the first bridge construction Since the construction process for the jointing device is omitted, it is easy and quick to construct the bridge, so it not only reduces the initial input cost, but also has no expansion joints. The purpose is to provide a method for constructing a jointless bridge.

The present invention is composed of a web connecting the upper flange and the lower flange, and a web connecting the central portion in the width direction of the upper flange and the lower flange to form an H-shaped cross-section; An end extension protruding flange formed of a horizontal plate-shaped support portion formed at a predetermined width larger than the width of the upper flange and a side portion formed upward from the support portion, and joined to protrude outward by a predetermined length from both ends in the longitudinal direction of the H-shaped body; It is intended to provide a steel girder having an end extension protrusion flange and a support concrete block, characterized in that it comprises; a support concrete block formed to a certain thickness only in the entire width or a part of the upper surface of the end extension protrusion flange.

In addition, the end extension protruding flange and the end extension protruding flange, characterized in that the incision is formed so that the slit portion is cut from the central portion in the width direction from the inner end side to a predetermined length in the longitudinal direction, so that the end of the H-shaped body is fitted into the slit portion. It is intended to provide a steel girder having a supporting concrete block.

In addition, in the H-type body, a portion of the upper flange and a portion of the web are cut so that the upper ends of both ends in the longitudinal direction are partially cut, and the chin portion is formed so that the outer end portion of the end extension protruding flange support portion protrudes a certain length from the outer end portion of the web. It is intended to provide a steel girder having an end-extended protruding flange and a supporting concrete block, which is characterized in that it is joined to.

In addition, to provide a steel girder having an end extension protrusion flange and a support concrete block, characterized in that a plurality of shear connecting materials are formed on the upper surface of the support portion of the end extension protrusion flange.

In addition, the supporting concrete block is made of a precast member in which a through hole corresponding to the shear connecting material is formed, and characterized in that the through connecting hole of the supporting concrete block is fitted to the shear connecting material so that the shear connecting material protrudes to the upper portion of the end expansion protrusion flange. It is intended to provide a steel girder having an end-extended protruding flange and a supporting concrete block.

In addition, the end extension projecting flange is to provide a steel girder having an end extension projecting flange and a supporting concrete block, characterized in that the side portion is formed in a diagonal direction, and the jaw portion is formed corresponding thereto.

In addition, it is intended to provide a steel girder having an end extension protrusion flange and a supporting concrete block, characterized in that a vertical reinforcement plate is formed in the vertical direction in the widthwise central portion of the end extension protrusion flange.

In addition, to provide a steel girder having an end-extended protruding flange and a supporting concrete block, characterized in that a plurality of through holes are formed in the vertical reinforcement plate.

In addition, the vertical reinforcement plate is intended to provide a steel girder having an end-extended protruding flange and a supporting concrete block, which is formed higher than the upper flange.

In addition, it is intended to provide a steel girder having an end extension projecting flange and a supporting concrete block, characterized in that a horizontal reinforcement plate is formed in a horizontal direction on an upper surface of a vertical reinforcement plate.

In addition, the end support projecting member is to provide a steel girder having an end expansion projecting flange and a base concrete block, characterized in that the base is formed in a multi-stage shape having one or more steps to the top or bottom.

In addition, (a) after the ground clearance step of constructing a pile in line with the bottom of the ground and constructing an alternating structure; (b) mounting the steel girder so that the bottom surface of the lower flange is mounted on the upper portion of the alternating structure, and the end extension projecting flange is further projected from the chest wall across the upper part of the chest wall; (c) constructing a bridge slab by pouring concrete on top of a steel girder including an end-extended protruding flange and a supporting concrete block after assembling the rebar and installing the formwork; (d) performing a backfill on the rear surface of the alternating structure to form a backfill; (e) constructing a connecting slab on the upper portion of the backfill; it is intended to provide a method for constructing a jointless bridge using a steel girder having an end-extended protruding flange and a supporting concrete block.

In addition, in step (b), the bottom surface of the support portion of the end extension projecting flange of the steel girder is mounted with a steel girder having an end extension projecting flange and a supporting concrete block, characterized in that it is mounted so as to be spaced a certain distance from the upper end of the chest wall. We would like to provide a joint bridge construction method.

In addition, in the step (b), the steel girder and the steel girder mounted transversely to the upper portion of the alternating structure are continuously positioned so that the end extension protrusion flanges are in contact with each other. It is intended to provide a method for constructing a jointless bridge using girder.

A steel girder having an end extension projecting flange and a supporting concrete block of the present invention and a method for constructing a non-joint bridge using the same are constructed with an end extending projecting flange so as to protrude a certain length from both ends in the longitudinal direction of the steel girder and to form a supporting concrete block on the top. Therefore, when the girder is mounted on the alternating structure, the concrete block that is supported on the outside of the bridge support protrudes outward from the bridge support with respect to the girder longitudinal direction starting from the bridge support that mounts the girder. Prevents the weight of the supporting concrete block and the wheel load of the vehicle from acting on the chest wall, and the installation of the expansion joint is unnecessary, so the chest wall, bridge support, and floor plate with high damage in the concrete alternating structure caused by water leakage into the expansion joint Deterioration can be suppressed to increase the endurance life of the bridge, and the driving performance of vehicles entering the bridge section in the earthwork section is improved, and there is no expansion and contraction device. It has an extremely useful effect of reducing the initial input cost due to the easy and fast construction of the bridge, as it does not require a replacement cost during maintenance because the construction process for the expansion joint is omitted during initial bridge construction. have.

The following drawings attached in the present specification are intended to illustrate preferred embodiments of the present invention, and serve to further understand the technical idea of the present invention together with the detailed description of the present invention, so the present invention is only described in the accompanying drawings. It should not be interpreted as limited.
1 is a perspective view and a side view of another embodiment of a steel girder having an end extension projecting flange and a base concrete block of the present invention.
Figure 2 is a perspective view and a side view of another embodiment of a steel girder having an end extension projecting flange and a base concrete block of the present invention.
3 is an exploded perspective view and a side view of another embodiment of FIG. 2.
4 is a perspective view of another embodiment of the concrete block of the present invention.
5 is a perspective view and a side view of various embodiments of a steel girder having an end extension projecting flange and a base concrete block of the present invention.
6 is a view showing the construction method of a jointless bridge using a steel girder having an end extension projecting flange and a base concrete block of the present invention in a construction order.
7 is a partially enlarged perspective view showing one embodiment of the lateral continuous arrangement of the steel girders in the step of Figure 6b.
8 is a partially enlarged view of FIG. 6D.
9 is a view showing the structure of a bridge in which a conventional expansion joint device is constructed.

The present invention will be described in detail below with reference to the embodiments presented in the accompanying drawings, but the presented embodiments are illustrative for a clear understanding of the present invention and the invention is not limited thereto.

Hereinafter, the technical configuration of the present invention will be described in detail according to a preferred embodiment.

1 is a perspective view and a side view of another embodiment of a steel girder having an end extension projecting flange and a base concrete block of the present invention, and FIG. 2 is a perspective view of another embodiment of a steel girder having end extension projecting flange and a base concrete block of the present invention. And a side view, and FIG. 3 is an exploded perspective view and a side view of another embodiment of FIG. 2.

Steel girder (1) having an end-extended protruding flange and a base concrete block of the present invention, as shown in Figure 1, the end-extended protruding flange 20 at both ends in the longitudinal direction of the H-type body 10, H-type body 10 It is configured to protrude more than a predetermined length to the outside, and the concrete block 30 is formed on the upper portion of the end extension protruding flange 20.

The H-shaped body 10 is composed of an upper flange 11 and a lower flange 12 and a web 13 connecting the central portion of the upper flange 11 and the lower flange 12 in the H-shaped section. The H-shaped body 10 may have the same thickness of the upper flange 11, the lower flange 12, and the web 13, or may be variously formed.

As shown in FIG. 1B, the end extension protruding flange 20 is joined to protrude a predetermined length longer than the outer end of the H-shaped body 10 at both ends in the longitudinal direction of the H-shaped body 10, and the protruding lengths are variously formed. It can be, the height of the H-type body 10 is joined at the cross-section can also be formed in various ways.

The end extension protruding flange 20 is composed of a horizontal plate-shaped support portion 21 and a side portion 22 formed upward from the support portion 21, the central portion in the width direction to join the H-shaped body 10 It may be cut so as to be joined at both sides of the H-type body 10 (not shown), as shown in FIG. 1, the slit portion 21a cut from the central portion in the width direction at the inner end side to a certain length in the longitudinal direction outside. The web 13 at the end of the H-shaped body 10 may be configured to fit on the slit portion 21a.

In addition, as shown in Figure 2, in the present invention, the upper portion is cut at both ends in the longitudinal direction of the H-shaped body 10 so that the jaw portion 14 is formed, and the end extension protruding flange 20 is seated on the jaw portion 14 It can be easily and stably seated to be joined by joining.

The jaw portion 14 is formed such that a portion of the upper flange 11 and a portion of the web 13 are cut so that the upper portions of both ends of the longitudinal direction of the H-shaped body 10 are partially cut, as in FIG. 2B. The flange 20 is seated on the jaw 14 so as to be joined.

The end extension protruding flange 20 is formed to have a certain length longer than the length at which the jaw portion 14 is formed in the H-shaped body 10 in the case of the supporting portion 21, and the width is formed larger than the width of the upper flange 11 By making it possible, when the end extension protruding flange 20 is joined to the chin portion 14, a part of the outer end of the base 21 of the end extension protruding flange 20 is a lower flange 12 of the H-shaped body 10 It is made to protrude more than a certain length of the end and its width also protrudes more than a certain length to both sides of the width of the upper flange 11.

In addition, as shown in FIG. 3, the jaw portion 14 is formed, and the slit portion 21a is also formed in the end extension protruding flange 20, so that the H-type is formed in the slit portion 21a of the end extension protruding flange 20. At the same time that the end of the main body 10 is fitted, the bottom portion 21 may be seated on the chin portion 14, and the side portion 22 may be interpolated deeper than the chin portion 14.

In this way, the end extension projecting flange 20 is configured to protrude a certain length outward from the end of the H-type body 10, thereby providing a steel girder having an end extension projecting flange and a supporting concrete block of the present invention on top of the alternating structure. ), the end of the lower flange 12 is mounted on the alternating structure, the end extension projecting flange 20 is configured to pass over the top of the chest wall, and the concrete block 30 is supported on the top of the end extension projecting flange 20. Because of this formation, it is not necessary to install a separate expansion joint, and it is possible to prevent the impact generated when passing the vehicle wheel is not directly transmitted to the chest wall sphere.

The end extension protruding flange 20 is seated and joined to the upper surface of the web 13 in which the chin portion 14 is formed in the widthwise central portion of the support portion 21, and the side portion 22 is a web in which the chin portion 14 is formed ( 13) and the upper flange 11 to be in close contact.

5 is a perspective view and a side view of various embodiments of a steel girder having an end extension projecting flange and a base concrete block of the present invention.

End extension protruding flange 20, as shown in Figures 2a to 2c, the support portion 21 is formed in the horizontal direction, the side portion 22 can be formed to form a cross section b to be formed in the vertical direction, , As shown in FIGS. 5A to 5D, the end extension protruding flange 20 may allow the side portion 22 to be formed in a diagonal direction, in which case the chin portion 14 is formed to correspond to the side portion 22 of the diagonal line. do.

In addition, the vertical extension plate 212 is formed in the vertical direction as shown in FIGS. 5A to 5D in the widthwise central portion of the end extension protruding flange 20, so that the reinforcement function and the shear connection material can be performed vertically. A plurality of through holes 213 may be formed in the reinforcing plate 212.

At this time, the vertical reinforcing plate 212 may be formed to have the same height as the side portion 22, and is formed higher than the side portion 22, as shown in FIGS. 5C and 5D, to a certain height than the upper surface of the upper flange 11 It can also be made high.

In addition, since the end extension protruding flange 20 protrudes past the upper portion of the chest wall of the alternating structure so that the load of the vehicle wheel does not act on the chest wall, as shown in FIG. 5D, the upper surface of the vertical reinforcement plate 212 The horizontal reinforcing plate 215 is additionally formed in the horizontal direction to serve as a reinforcement together with the vertical reinforcing plate 212.

As shown in FIGS. 2A to 2C, the end extension protruding flange 20 is formed with a plurality of shear connecting materials 211 such as stud bolts formed on the upper surface of the support portion 21 of the end extension protruding flange 20. In case of pouring concrete, it is possible to resist the synthetic and horizontal shear forces between the upper concrete.

When the steel girder 1 is manufactured, the supporting concrete block 30 is first formed by pouring concrete on the top of the end extension projecting flange 20, and at this time, the concrete is poured on the top of the end extension projecting flange 20. When formed by forming a shear connecting material such as a separate stud bolt, concrete may be poured to form the supporting concrete block 30.

The support concrete block 30 may be formed to be formed in the entire area of the end extension projecting flange 20, and may be configured only in a range corresponding to only a portion of the width of the support portion 21. At this time, the height of the supporting concrete block 30 may be formed to be the same as the height of the side portion 22, or may be formed lower or higher than the side portion 22, if necessary.

4 is a perspective view of another embodiment of the concrete block of the present invention.

The concrete block 30 may be formed by pouring concrete directly on the end extension protrusion flange 20 as described above. In particular, as shown in FIG. 4A, the end extension protrusion flange is manufactured by using a separate precast concrete member. (20).

When the support concrete block 30 is manufactured as a precast member in this way, a plurality of shear connecting materials are formed on the upper surface of the support portion 21 of the end extension projecting flange 20 in order to increase the bondability with the end expansion projecting flange 20. In the embodiment in which 211 is formed, the supporting concrete block 30 is made of a precast member in which a through hole 31 corresponding to the shear connection material 211 is formed, so that the shear connection material 211 protrudes from the end extension. The through-hole 31 of the supporting concrete block 30 may be fitted to the shear connector 211 so as to protrude to the upper portion of the flange 30.

In addition, as shown in Figure 4b, the support concrete block 30 may be formed to protrude further outward of the support portion 21, at this time, so that the protruding portion extends to the lower portion so that the extended jaw portion 32 is formed Thus, when mounted on the upper portion of the chest wall, the extended jaw portion 32 may be easily mounted on the chest wall.

In particular, the end extension protruding flange 20 may be made of a horizontal plate shape, as shown in FIG. 5f(a), and the upper portion as shown in FIGS. 5f(b) and 5f(c). Or it may be formed in a multi-stage shape having a step difference of one or more steps to the bottom.

That is, as shown in FIG. 5f(b), a stepped surface having a step is formed at the bottom or a stepped surface having a step is formed at the top as in FIG. 5f(c), so that the step with the connecting slab is eliminated. Can.

6 is a view showing the construction method of a jointless bridge using a steel girder having an end-extended protruding flange and a base concrete block of the present invention in order of construction, and FIG. 7 is a lateral continuous arrangement of steel girders in FIG. 6B. It is a partially enlarged perspective view showing an embodiment of, Figure 8 is a partially enlarged view of Figure 6d.

The method of constructing a jointless bridge using a steel girder having an end-extended protruding flange and a supporting concrete block according to the present invention will be described in detail as follows.

A steel girder (1) having an end extension protrusion flange and a support concrete block used in a method for constructing a jointless bridge using a steel girder having an end extension protrusion flange and a support concrete block of the present invention has been described in detail above. It will be omitted.

First, as shown in FIG. 6A, after arranging the ground, the pile 27 is constructed in line with the ground bottom G and the alternating structure 2 is constructed (a).

The shift structure 2 is made in the same way as a general shift structure.

The filling structure is carried out at the position where the shift structure 2 is to be installed, the pile 27 is constructed, then the shift structure 2 is constructed, and the bridge support 3 is installed on the upper surface of the shift structure 2.

Thereafter, as shown in FIG. 6B, the steel girder 1 is mounted on the lower surface of the lower flange 12 to be mounted on the upper portion of the bridge bearing 3 of the alternating structure 2 (b).

At this time, the steel girder (1) of the present invention is mounted to be seated on the upper portion of the lower bridge bearing (3) at both ends of the longitudinal direction of the lower flange (12), and the end extension protrusion flange (20) is the upper portion of the chest wall (7). Cross the chest wall 7 so that a certain length protrudes.

In this way, the upper end of the chest wall 7 allows the end-extended protruding flange 20 and the supporting concrete block 30 to pass, so that the construction of the expansion and contraction device is unnecessary, and a step between the upper end of the chest wall and the bottom plate is prevented from occurring. In addition, the deflection of the girder due to the overload of the passing vehicle in the middle of the bridge using the conventional expansion joint device is caused by the rotation at the end point and the step occurs, resulting in a step and the top of the chest wall and the bottom plate, girder, bridge support It can solve the problems such as deterioration of the performance of the structure, deterioration of fatigue performance, and generation of passing noise due to the large impact load.

Particularly, the end extension projecting flange 20 and the supporting concrete block 30 of the steel girder 1 are located at the upper part of the chest wall 7, at this time, the lower part of the support part 21 of the end expansion projecting flange 20. By allowing the surface to be mounted spaced a certain distance from the upper end of the chest wall (7), the end extension protrusion flange (20), the supporting concrete block (30), and the wheel load of the vehicle are prevented from acting on the chest wall (7).

That is, in the present invention, the end extension protruding flange 20 and the supporting concrete block 30 are formed to protrude more than the ends of the steel girders 1, but the steel bridge girders 3 installed on both sides of the steel girders 1 are used as starting points. The girder (1) is formed so that the end extension projecting flange (20) and the supporting concrete block (30) protrude more in the outward direction of the bridge support (3) with respect to the longitudinal direction, and the end position thereof is the chest wall of the alternating structure (2) ( 7) is formed to protrude beyond at least 100 mm past the upper portion, and the protruding end extension protruding flange 20 is positioned at a predetermined distance from the upper portion of the chest wall 7 to the upper end to extend the protruding flange 20, It is a method that the road pavement between the earthwork section including the bridge connection part is formed by forming the concrete block 30 and the vehicle wheel load at regular intervals so as not to act on the chest wall 7.

When the steel girder 1 is mounted, as shown in the drawing, it is continuously mounted in the transverse direction to the upper part of the alternating structure 2, wherein the steel girder 1 adjacent to the steel girder 1 is an end extension protruding flange ( 20) to be continuously positioned so as to be in contact with each other, and the end extension protruding flanges 20 can act as a formwork by making simple joints using bolts and welding in the width direction of the bridge.

Subsequently, after assembling the reinforcing bar and installing the formwork, concrete is poured over the steel girder 1 including the upper portion of the end-extended protrusion flange 20 and the supporting concrete block 30 to construct the bridge slab 4 (c) ).

In general, the bridge slab constituting the superstructure has the same length as the girder, which is constructed with a predetermined thickness on the girder upper flange surface between the bridge bearing and the bridge bearing, so that the floor plate usually exceeds the girder length. It is not manufactured (formed) very much, because the interference with the chest wall of the alternating structure of the existing joint bridge construction method with the expansion joint is impossible.

However, the bridge slab (4) in the present invention is formed by pouring concrete on the top of the steel girder (1), including the top of the end extension projecting flange 20 and the supporting concrete block 30, as shown, the bridge The slab (4) is to pass through the upper portion of the chest wall (7) so that the end extension protrusion flange (20) is formed to the configured point.

Thereafter, the back filling portion 5 is formed by performing back filling on the rear surface of the alternating structure 2 (d).

Lastly, the connection slab 6 is installed on the upper portion of the rear filling portion 5 (e).

After the construction of the connecting slab 6, the concrete or ascon pavement layer 91 is formed on the connecting slab 6 to be continuous with the bridge slab 4.

The steel girder having the end extension projecting flange and the supporting concrete block of the present invention as described above, and the method for constructing a jointless bridge using the same, constitute the end extending projecting flange so as to protrude a certain length from both ends in the longitudinal direction of the steel girder and support the concrete block supporting the upper part. When the girder is mounted on the alternating structure, the concrete block that is supported on the outside of the bridge support protrudes outward from the bridge support in the longitudinal direction of the girder. Prevents the weight of the protruding flange and the supporting concrete block and the wheel load of the vehicle from acting on the chest wall, and it is unnecessary to install the expansion and contraction device, so it is difficult to install the expansion and contraction device. It is possible to increase the endurance life of the bridge by suppressing deterioration of the floor plate, etc., and improve the driving performance of the vehicle entering the bridge section in the earthwork section, and there is no expansion and contraction device, so the girder or floor plate of the bridge due to shock and vibration The fatigue endurance is increased, and the construction process for the expansion joint is omitted during the first bridge construction, so it is easy and quick to construct the bridge, reducing the initial input cost, and there is no expansion joint. It has a useful effect.

The present invention has been described in detail with reference to the presented embodiments, but those skilled in the art can make various modifications and modified inventions without departing from the technical spirit of the present invention with reference to the presented embodiments. will be. The present invention is not limited by such modified and modified inventions, but is limited by the appended claims.

1: steel girder
10: H-type body
11: upper flange
12: lower flange
13: Web
14: chin
20: end extension projecting flange
21: base
22: side part
30: support concrete block
2: Shift structure
3: Bridge support
4: Bridge slab
5: backfill
6: Connection slab
7: chest wall

Claims (15)

An H-shaped body 10 consisting of a web 13 connecting the upper flange 11 and the lower flange 12 and the upper flange 11 and the central portion in the width direction of the lower flange 12 to form an H-shaped cross section;
Consists of a horizontal plate-shaped support portion 21 and a side portion 22 formed upward from the support portion 21, which are formed to be larger than the width of the upper flange 11, at both ends in the longitudinal direction of the H-shaped body 10. An end extension protruding flange 20, which is joined so as to protrude outward a predetermined length, respectively;
A steel girder having an end extension projecting flange and a support concrete block, characterized in that it comprises; a support concrete block 30 formed to a certain thickness only in the entire width or a part of the upper surface of the end expansion projecting flange 20. The method according to claim 1,
The end extension protruding flange 20 is formed with a slit portion 21a cut from the central portion in the width direction at the inner end side to a predetermined length in the longitudinal direction outside,
A steel girder having an end extension projecting flange and a supporting concrete block, characterized in that the end of the H-shaped body 10 is configured to fit into the slit portion 21a. The method according to claim 1,
In the H-type body 10, a portion of the upper flange 11 and a portion of the web 13 are cut so that the upper portion of the both ends in the longitudinal direction is partially cut to form the jaw portion 14,
Steel with end extension protrusion flange and bearing concrete block, characterized in that the end extension protrusion flange 20 is joined to the jaw 14 so that the outer end of the support portion 21 protrudes a certain length than the outer end of the web 13. Girder. The method according to claim 1,
A steel girder having an end extension protrusion flange and a bearing concrete block, characterized in that a plurality of shear connecting materials 211 are formed on the upper surface of the support portion 21 of the end extension protrusion flange 20. The method according to claim 4,
The supporting concrete block 30 is made of a precast member in which a through hole 31 corresponding to the shear connecting material 211 is formed,
Shear connector (211) is configured to fit through the through hole (31) of the support concrete block (30) in the shear connector (211) so as to protrude to the upper portion of the end extension projecting flange (30) and the end expansion projecting flange and the support Steel girders with concrete blocks. The method according to claim 1,
The supporting concrete block 30 is a steel girder having an end-extending protruding flange and a supporting concrete block, characterized in that an extended jaw portion 32 extending further downward by protruding outward of the supporting portion 21 is formed. The method according to claim 1,
The end extension protruding flange 20 has a side portion 22 formed in a diagonal direction,
The jaw portion 14 is a steel girder having an end extension projecting flange and a supporting concrete block, which are formed correspondingly. The method according to claim 1,
A steel girder having an end extension protrusion flange and a supporting concrete block, characterized in that a vertical reinforcement plate 212 is formed in a vertical direction in the widthwise central portion of the end extension protrusion flange 20. The method according to claim 8,
A steel girder having an end extension projecting flange and a supporting concrete block, characterized in that a plurality of through holes 213 are formed in the vertical reinforcement plate 212. The method according to claim 8,
The vertical stiffening plate 212 is a steel girder having an end extension projecting flange and a supporting concrete block, which is formed higher than the upper flange 11 by a predetermined height. The method according to claim 8,
A steel girder having an end extension projecting flange and a supporting concrete block, characterized in that a horizontal reinforcement plate 215 is formed in a horizontal direction on an upper surface of the vertical reinforcement plate 212. The method according to claim 1,
End support projecting member 20 is a steel girder having an end expansion projecting flange and a support concrete block, characterized in that the support 21 is formed in a multi-stage shape having one or more steps to the top or bottom. A method for constructing a jointless bridge using a steel girder having an end-extended protruding flange and a supporting concrete block according to any one of claims 1 to 12,
(a) constructing piles 27 in line with the ground bottom portion G and arranging alternating structures 2 after the ground arrangement;
(b) The steel girder (1) is mounted on the lower surface of the lower flange (12) on the top of the alternating structure (2), and the end extension projecting flange (20) crosses the upper part of the chest wall (7) to the chest wall (7). Mounting so as to protrude further from;
(c) constructing a bridge slab (4) by pouring concrete on the upper part of the steel girder (1) including the upper part of the end extension projecting flange (20) and the supporting concrete block (30) after assembling the rebar and installing the formwork, and ;
(d) forming a backfill portion 5 by backfilling the rear surface of the alternating structure 2;
(e) constructing a connecting slab 6 on the upper part of the backfilling part 5; a method for constructing a jointless bridge using a steel girder having an end-extended protruding flange and a supporting concrete block. The method according to claim 13,
In step (b),
The end extension protrusion flange of the steel girder (1) having an end extension protrusion flange and a supporting concrete block, characterized in that the lower surface of the support portion (21) of the end portion is mounted to be spaced a certain distance from the upper end of the chest wall (7) Construction method of jointless bridge using steel girder. The method according to claim 13,
In step (b),
The steel girder (1) and the steel girder (1) mounted in the transverse direction on the upper portion of the alternating structure (2) are continuously extended so that the end extension protrusion flange (20) is in contact with the end extension protrusion flange and the supporting concrete Construction method for jointless bridges using steel girders with blocks.

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