KR20060076993A - Connection Slab Dowel Bar Installation Structure of Bridge - Google Patents

Abstract

According to the present invention, when the connecting slab is connected to the upper part of the alternating rear, it can be quickly and easily achieved in comparison with the existing dowel bar, so that construction convenience and air can be greatly reduced, and the connection between the alternating and connecting slabs can be firmly achieved. The installation slab dowel bar installation structure of a bridge.

In particular, the fixing anchor is inserted into the rear upper portion of the shift, the locking jaw is formed on the lower outer periphery, the screw anchor is formed on the upper outer periphery; It has a shape extending in all directions, the lower center is formed with a screw hole for fastening the fixing anchor, a long hole is formed through the side of each extended portion, the elastic spring is connected to the outside Rectangular fastening frame; The rectangular fastening frame has a shape that can be inserted into the lower part, but a rubber material for water is attached to the lower end of the rectangular fastening frame, and communication with the long hole formed in the rectangular fastening frame is provided on the side of each part extending in all directions. A fastening hole which can be taken is formed, and an upper fastening cap having a connection groove formed on the outer upper and lower parts thereof; The fastening bolts may be formed to penetrate each of the fastening holes and the long holes located in all directions to form a fastening cap and a rectangular fastening frame, but having an index ring on the inner side thereof to allow waterproofing of the fastening holes during the fastening; The outer reinforcing cap is configured to include an outer reinforcing frame integrally connected by using a connection groove formed on the outer upper and lower portions of the upper fastening cap.

Rectangular fastening frame, upper fastening cap, external reinforcing frame

Description

Dowel bar assembly structure of connect concrete for bridge

1 is an exploded perspective view showing the configuration of the connecting slab dowel bar installation structure of the bridge according to the present invention.

2 is a cross-sectional view showing an installation state of the connecting slab dowel bar installation structure of the bridge according to the present invention.

3 is a cross-sectional view showing a state of use of the connecting slab dowel bar installation structure of the bridge according to the present invention.

Figure 4 is a cross-sectional view showing a connecting slab dowel bar installation structure of a conventional bridge.

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

1: shift 2: slab slabs

3: teaching device 4: dowel bar

5: connecting slab 6: internal steel bar

7: outer cover 8: asphalt filling hole

9: Asphalt 10: Attached iron material

20: fixed anchor 22: locking jaw

24: screw surface 26: screw hole

28: long hole 30: elastic spring

32: rectangular fastening frame 34: water rubber material

36: fastening hole 38: connection groove

40: upper fastening cap 42: index ring

44: fastening bolt 46: external reinforcement frame

The present invention relates to a connecting slab dowel bar installation structure of the bridge, and more particularly, when connecting the connecting slab to the upper portion of the rear shift can be achieved quickly and easily compared to the existing dowel bar, it is possible to significantly shorten the construction convenience and air The present invention also relates to a connecting slab dowel bar mounting structure of a bridge, which is capable of achieving a solid connection between the shift and the connecting slab.

In general, the joint portion of cement concrete pavement is very large in consideration of pavement commonity and pavement breakage.

In the case of road pavement, it can be said that the standards for joint application are established based on many years of research, design and construction experience.

Changes in temperature and water content in concrete slabs cause pavement expansion, contraction and warpage, which results in significant stresses.

To reduce the harmful effects of these stresses and to minimize cracking, the slabs should be partitioned to predetermined dimensions by using joints.

Joints allow shrinkage and expansion of concrete due to temperature and humidity changes, relieve warping and curling stress caused by temperature and humidity differences, and separate longitudinally and laterally installed concrete at different times in construction. Is necessary.

For reference, pavement joints are classified according to the functions used and are roughly classified into three types: expansion, construction, and contraction joints.

Here, the expansion joint separates the intersecting pavement and separates other structures from the pavement, which are roughly dowel type and thick end type.

The double, dowel type is used for the desired joints under adverse conditions such as heavy loads, heavy traffic, low strength foundations.

The joints are then equipped with expansion joints and require dowel bars for load transfer.

Here, the dowel bar (4) is the upper slab (2) is seated on the alternator (1) via the alternating device (3) as shown in Figures 4a and 4b, the connecting slab (5) in the rear When used to form a bar, for reference, when there is no connection slab 5, the problem that the road surface is connected to the upper slab (2) is settled downward.

In more detail, the dowel bar 4 covers the outer cover 7 after installing the inner steel bar 6 and fills the asphalt 9 through the asphalt filling hole 8 therein, and vibrates outside. Reinforcing the concrete structure against the impact force is installed in such a way to install a band-shaped accessory iron material 10 for extending the life of the concrete structure.

Therefore, the existing dowel bar requires a curing period due to the asphalt filling during construction, which significantly delays the air, and when such asphalt curing occurs, the connection between the shift and the connecting slab cannot be secured. There was a problem causing the deformation of the installation state can not be effectively maintained.

In addition, the structure alone is not able to achieve a solid bond with the connection slab, there was a cumbersome problem of using a separate accessory steel material.

In addition, when the period elapses, there is a problem in that chemical deformation of the asphalt filled by the leakage flowing through the asphalt filling hole is caused.

In addition, the dowel bar is simply connected and fixed between the alternating and connecting slab, so that when a strong load is transferred from the connecting slab, the effective relaxation operation cannot be achieved. Therefore, the dowel bar itself and the alternating and connecting slab are formed by the dowel bar. There was a problem that caused partial breakage.

The present invention has been made in view of the conventional problems as described above, the object is to achieve a quick and easy construction compared to the existing dowel bar when connecting the connecting slab to the upper part of the alternating back, the construction convenience and air The present invention provides a bridge connecting slab dowel bar mounting structure that can greatly shorten and securely establish a connection bond between a shift and a connecting slab.

Specific means of the present invention for achieving the above object,                         

In the dowel bar used when connecting the connecting slab to the rear of the shift,

A fixed anchor inserted into and fixed to the rear upper portion of the shift, the locking jaw being formed at the lower outer periphery, and the screw surface being formed at the upper outer periphery;

It has a shape extending in all directions, the lower center is formed with a screw hole for fastening the fixing anchor, a long hole is formed through the side of each extended portion, the elastic spring is connected to the outside Rectangular fastening frame;

The rectangular fastening frame has a shape that can be inserted into the lower portion, but a rubber material for water is attached to the lower end of the rectangular fastening frame, and the rectangular fastening frame is attached to the rectangular fastening frame when the rectangular fastening frame is attached to the side of each part extending in all directions. A fastening hole is formed to communicate with the formed long hole, the upper and lower outer fastening caps having connection grooves formed therein;

The fastening bolts may be formed to penetrate each of the fastening holes and the long holes located in all directions to form a fastening cap and a rectangular fastening frame, but having an index ring on the inner side thereof to allow waterproofing of the fastening holes during the fastening;

The outer reinforcing cap is configured to include an outer reinforcing frame integrally connected by using a connection groove formed on the outer upper and lower portions of the upper fastening cap.

Hereinafter, the configuration of the present invention in detail with reference to the drawings.

1 is an exploded perspective view showing the configuration of the connection slab dowel bar installation structure of the bridge according to the present invention, Figure 2 is a cross-sectional view showing the installation state of the connection slab dowel bar installation structure of the bridge according to the present invention.

For reference, in describing the present invention, when it is determined that a detailed description of related known functions or configurations may unnecessarily obscure the gist of the present invention, the detailed description thereof is omitted.

In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to intentions or customs of users and operators.

Therefore, the definition should be made based on the contents throughout the specification.

As shown, the fixing anchor 20 is inserted into and fixed to the rear upper portion, and the locking jaw 22 is formed at the lower outer periphery, and the screw surface 24 is formed at the upper outer periphery. It is provided, the upper part of the fixing anchor 20 is taken in a shape extending in all directions, the long hole 28 is formed through the side of each of the extended portion, the elastic spring 30 is connected to the outside is installed Rectangle fastening frame 32 is located through the screw hole 26 formed in the lower center.

And, the outer side of the rectangular fastening frame 32, the rubber material 34 for the water stop is attached to the lower end, the fastening hole which can communicate with the long hole 28 on the side of each portion extending in all directions ( 36 is formed, the upper and lower portions of the upper fastening cap 40 is formed with a connecting groove 38 is formed, the fastening hole 36 and the long hole in each of the fastening holes 36 located in all four directions A through-hole 28 may be formed to bond the upper fastening cap 40 and the rectangular fastening frame 32 to each other, and an inner ring 42 may be provided at an inner side thereof to achieve waterproofing of the fastening hole 36 during the fastening. Fastening bolts 44 are installed,

In addition, the outer reinforcing frame 46 is installed in the connection groove 38 formed on the outer upper and lower portions of the upper fastening cap 40.

Next, the operational effects of the present invention will be described with reference to the accompanying drawings.

3 is a cross-sectional view showing a state of use of the connecting slab dowel bar installation structure of the bridge according to the present invention.

This is located in the rear upper portion of the shift (1), as shown in the figure, first, the fixed anchor 20 is inserted into the fixed position in this position and then fastened the rectangular fastening frame 32 on the upper portion of the fixed anchor 20 Fixing, and then connected to the upper fastening cap 40 from the upper portion of the rectangular fastening frame 32 is installed.

Then, by inserting the fastening bolts 44 into the respective fastening holes 36 located at all sides of the upper fastening cap 40, the fastening cap 40 and the rectangular fastening frame 32 are combined, and thus the connection is fixed. Installation is completed by connecting the external reinforcing frame 46 to the connection groove 38 formed on the outer side of the upper fastening cap 40.

Accordingly, the construction of the dowel bar itself can be quickly and easily improved, and the air shortening, as well as the connection process with the connection slab 5, which is subsequently poured, can be greatly advanced, thereby reducing the overall air.

In addition, by placing the rubber material 34 and the index ring 42 for the water leakage is expected to be able to minimize the deformation of the member due to the improved water resistance it is possible to maintain the installation state for a long time.

In addition, it is possible to achieve a solid bond with the connection slab 5 that is poured in itself, it is not necessary to use a separate accessory material as in the conventional case.

That is, because the same function as the existing accessory steel material can be achieved through the outer reinforcing frame 46.

In addition, the upper fastening cap 40 and the rectangular fastening frame 32 is somewhat stronger from the connecting slab 5 because the elastic spring 30 is positioned between the predetermined front, rear, left and right flows. When the load is transferred, the interlocking relaxation operation is performed and partial damage to the shift 1 and the connecting slab 5, in which the upper fastening cap 40 and the rectangular fastening frame 32, which constitute the dowel bar, are connected by the load transfer. It is possible to prevent the problem that causes the problem in advance.

For reference, the present invention may be variously modified and may take various forms. However, in the detailed description of the present invention, only specific embodiments thereof are described.

Therefore, it is to be understood that the invention is not to be limited to the specific forms referred to in the description, but rather to include all modifications, equivalents and alternatives falling within the spirit and scope of the invention as defined by the appended claims. It must be understood.

As described above, the present invention can be achieved quickly and easily compared to the existing dowel bar when connecting the connecting slab on the upper part of the shift, there is an effect that can greatly shorten the construction convenience and air.

The upper fastening cap and the rectangular fastening frame which make up the dowel bar by interlocking and loosening action from the impact load transferred from the connecting slab as well as enabling the solid connection between the shift and the connecting slab to themselves. It is possible to prevent the problem that causes partial damage to the connected shift and the connecting slab in advance, and it is possible to greatly improve the service life of the connected shift and the connecting slab as well as the dowel bar itself. .

Claims (1)

In the dowel bar (4) used at the time of connecting the connecting slab (5) to the rear of the alternation (1), A fixed anchor 20 which is inserted and fixed to the rear upper portion of the shift 1 and has a locking jaw 22 formed at the lower outer periphery and a screw surface 24 formed at the upper outer periphery; It has a shape extending in all directions, the lower center is formed with a screw hole 26 for fastening the fixing anchor 20, the long hole 28 is formed through the side of each extended portion. On the outside, the elastic spring 30 is connected to the rectangular fastening frame 32 is installed; The rectangular fastening frame 32 has a shape that can be inserted into the lower portion, but the rubber material 34 for the water stop is attached to the lower end of the rectangular fastening frame 32, and the four sides of the rectangular fastening frame ( A fastening hole 36 is formed to communicate with the long hole 28 formed in the 32, the upper and lower upper fastening cap 40 is formed with a connection groove 38; The through-holes 36 and the long holes 28 located in all four sides of the through fastening cap 40 and the four-sided fastening frame 32 can be formed, but the inner ring is provided with an index ring 42 A fastening bolt 44 for promoting waterproofing of the fastening hole 36 when being bound; The connecting slab dowel bar of the bridge, characterized in that configured to include integrally the outer reinforcement frame 46 is connected using the connection groove 38 formed in the upper, lower portion of the upper fastening cap 40 Installation structure.

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