KR101259362B1 - Construction system of expansion joint for bridge - Google Patents

Abstract

PURPOSE: A construction system of an expansion joint for a bridge is provided to facilitate a holding by matching the inclination and height of a bridge slab and an expansion joint device using the magnetic force of an electromagnet. CONSTITUTION: A construction system of an expansion joint for a bridge comprises a re-bar(30), an electromagnet holding unit, and a height measuring unit(60). The electromagnet holding unit comprises a first electromagnet(42), a second electromagnet(44), and a controller. The electromagnet holding unit holds an expansion joint device in a stepped part(20) using the magnetic force of an electromagnet according to the inclination of a bridge slab. The height measuring unit comprises a gear tooth(62), a first gear(64), second gears(66,68), and a measuring unit(70). The measuring unit measures the number of rotations of a second gear and the height of a support rod.

Description

Extension joint construction device of bridge {CONSTRUCTION SYSTEM OF EXPANSION JOINT FOR BRIDGE}

The present invention relates to a construction device for constructing expansion joints between bridge slabs, and more particularly, it is possible to facilitate the setting of the gradient of expansion joints, to precisely match the gradient, as well as to the height adjustable bridge The expansion joint construction apparatus and its construction method.

In general, bridge slabs expand or contract with changes in temperature. Therefore, the tops of bridges constructed over a certain length have expansion joints between the two slabs in consideration of shrinkage and expansion. Expansion joints are installed for the purpose of reducing noise, improving ride comfort, and preventing foreign objects or rainwater from falling down.

When the expansion joint is cracked due to the traffic of the vehicle, it reduces the riding comfort and leaks foreign substances or rainwater, so the expansion joint should be replaced.

Conventional expansion joint structure and its construction method is disclosed in Patent Publication No. 10-0429377 (April 16, 2004), the stepped portion formed on the upper end of each bridge during the first and second bridge construction, and First and second connecting members made of metal having the same shape in the stepped part are fixed to the foundation beams supporting the respective bridges by welding means and anchors, and have elasticity that has a constant clearance for each joint between the slab plates of the respective bridges. A joint device is installed, and the expansion joint device includes a pair of enclosures integrally formed by fastening means at the stepped portions of the first and second connection members, and first and second extensions respectively formed on one side of the enclosure. A second side plate, a rubber plate installed on top of the first and second side plates, protection of the fastening means fastened through the inside of the enclosure, a filler for protecting the enclosure, and preventing the fastening means from being flown or broken Boy for It consists of an arc member.

Such a conventional expansion joint structure can be quickly installed because only the expansion joint is replaced when the expansion joint is installed by installing a replaceable expansion joint structure.

However, in general, the top of the bridge has a slope of about 2% inclined from the center to the edge of the top so that water can flow on both sides, and in the case of a curved bridge, the top of the bridge has a slope of about 2% outward compared to the inside. do.

Therefore, when replacing the expansion joint device, the expansion joint device should be installed to have the same gradient as the top plate, the conventional expansion joint structure has a problem that the expansion joint device does not have the same gradient as the top plate gradient.

In the existing expansion joint construction method, the contractor adjusts the height of the expansion joint by manually welding or cutting the rebar by adjusting the horizontal level using a horizontal ruler to adjust the gradient to the expansion joint.

However, this expansion joint construction method requires leveling using horizontal ruler and repeating cutting or re-welding of rebar according to its height, which makes the work difficult and longer working time, and the grade is manually adjusted using horizontal ruler. There is a problem that is difficult to match exactly.

Patent Publication No. 10-0429377 (April 16, 2004)

Therefore, an object of the present invention is to mount the expansion joint using the magnetic force of the electromagnet when mounted on the stepped portion is convenient to mount the expansion joint, it can be mounted according to the gradient and height of the expansion joint to a minute degree It is to provide an expansion joint construction apparatus for bridges and a construction method thereof.

Another object of the present invention is to provide a measuring unit that can measure the falling length of the support legs of the expansion joint device, the expansion joint construction apparatus of the bridge that can exactly match the gradient of the expansion joint and the slope and height of the bridge slab and It is to provide the construction method.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. .

In order to achieve the above object, when the expansion joint of the bridge of the present invention reinforcement is reinforced on the bottom surface of the stepped portion is formed in the bottom surface of the bridge slab horizontally, the expansion joint device of the electromagnet It characterized in that it comprises a height measuring unit for measuring the height of the support rod of the expansion joint device and the electromagnet mounting unit to be mounted in accordance with the gradient of the bridge slab by using a magnetic force.

The electromagnet mounting unit of the present invention includes a first electromagnet for attaching the upper surface of one edge of the expansion joint device with magnetic force, a second electromagnet for attaching the upper surface of the other edge of the expansion joint device with magnetic force, and a first electromagnet and the second electromagnet. It characterized in that it comprises a controller for controlling the first electromagnet and the second electromagnet by turning on / off the applied power.

The height measuring unit of the present invention is a gear tooth formed in the longitudinal direction of the support rod on at least one surface of the plurality of support rods, the first gear geared to the gear teeth, and the plurality of gear bites to the first gear It characterized in that it comprises a second gear and the measuring unit is installed on the second gear to measure the rotational speed of the second gear to measure the height of the support rod.

The expansion joint device of the present invention is a surface rubber disposed on the stepped portion formed in the bridge slab, a support block disposed on both sides of the surface rubber to support the surface rubber, and connected to both sides of the support block to the support block An anchor bar for providing a lateral pressing force, a support plate installed on the inner surface of the support block is seated on the lower surface of the surface rubber, and the support rod is longitudinally adjustable to the surface rubber and the support plate vertically adjustable .

Construction method of the expansion joint of the bridge of the present invention comprises the steps of forming a stepped portion to dismantle the existing expansion joint device on the upper end of the bridge slab, the step of reinforcing the reinforcing bar on the bottom surface of the stepped portion, the electromagnet on the upper side of the stepped portion Mounting the expansion joint to have the same gradient as the slope of the bridge slab by using the magnetic force of the step of measuring the falling length of the support rods installed at the corners of the expansion joint, and checking the falling length of the support rod And finely adjusting the height of the support rod to match the gradient of the bridge slab, and placing the mortar on the stepped portion to fix the expansion joint.

Mounting the expansion joint device of the present invention is the step of attaching the first electromagnet and the second electromagnet on the upper surface of both ends of the expansion joint device by the power supply to the first electromagnet and the second electromagnet, and the first electromagnet and the second electromagnet And mounting both ends on the upper surface of the bridge slab so that the expansion joint has the same gradient as that of the bridge slab, and lowering the supporting rod installed at the edge of the expansion joint to contact the bottom surface of the stepped portion. Characterized in that.

As described above, when the expansion joint of the bridge of the present invention is mounted by using the magnetic force of the first electromagnet and the second electromagnet when the expansion joint is mounted on the stepped portion, the expansion joint can be conveniently mounted. In addition, there is an advantage that can be mounted in a state in which the expansion joint is aligned.

In addition, when the expansion joint of the bridge of the present invention is mounted on the expansion joint device, the support rod is lowered and the bottom of the support rod contacts the bottom surface of the stepped portion, the height measuring unit measures the falling length of the support leg, After the operator checks this, there is an advantage that the grade of the expansion joint can be precisely adjusted by finely adjusting the height of the support leg.

1 is a side view of the expansion joint construction apparatus of a bridge according to an embodiment of the present invention.
Figure 2 is a top view of the expansion joint construction apparatus of a bridge according to an embodiment of the present invention.
3 is a perspective view of the expansion joint according to an embodiment of the present invention.
4 is a cross-sectional view of the expansion joint according to an embodiment of the present invention.
5 is a side view of the expansion joint according to an embodiment of the present invention.
6 to 11 are diagrams sequentially showing the construction method of the expansion joint of the bridge according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The sizes and shapes of the components shown in the drawings may be exaggerated for clarity and convenience. In addition, terms defined in consideration of the configuration and operation of the present invention may be changed according to the intention or custom of the user, the operator. Definitions of these terms should be based on the content of this specification.

Figure 1 is a side view of the expansion joint construction apparatus of a bridge according to an embodiment of the present invention, Figure 2 is a top view of the bridge expansion joint construction apparatus according to an embodiment of the present invention.

1 and 2, the factory expansion joint according to an embodiment is formed at the ends facing each other of the bridge slab 10 and the stepped portion 20 is installed, the expansion joint device 100, and Electromagnet mounting unit 40 for mounting the reinforcing bar 30 and the expansion joint 100 to the stepped portion 20 in accordance with the gradient of the bridge slab 10 by using an electromagnet on the stepped portion 20 ), And a height measuring unit 60 for measuring the height of the support rods (52, 54) of the expansion joint device (100).

This expansion joint factory factory is a construction device that can be installed to expand the expansion joint device to have the same gradient as the provision of the bridge slab 10 when the replacement operation of the expansion joint device (100).

Step portion 20 removes the concrete and ascon the end of the slab 10 in accordance with the replacement section (H) to remove the existing expansion joint and replace the new expansion joint. At this time, the bottom surface of the stepped portion 20 is formed in a horizontal plane.

The electromagnet mounting unit 40 includes a first electromagnet 42 for attaching an upper surface of one edge of the expansion joint device 100 to a magnetic force, and a second electromagnet for attaching an upper surface of the other edge of the expansion joint device 100 to a magnetic force ( 44 and a controller 46 for controlling the first electromagnet 42 and the second electromagnet 44 by turning on / off power applied to the first electromagnet 42 and the second electromagnet 44.

Here, since both ends of the first electromagnet 42 and the second electromagnet 44 are placed on the upper surface of the slab 10, the expansion joint device attached to the first electromagnet 42 and the second electromagnet 44 ( 100 is mounted with the same gradient as that of the slab 10.

The expansion joint 10 has a support rod (52, 54) is installed in the corner portion of the adjustable length, the support rod (52, 54) is in contact with the bottom surface of the stepped portion 20 expansion joint ( 100).

And, the height measuring unit 60 is a gear tooth 62 formed in the longitudinal direction of the support rod on at least one surface of the support rods (52, 54), the first gear geared to the gear tooth 62 ( 64 and the plurality of second gears 66 and 68 geared to the first gear 64 and the second gears 66 and 68 to measure the rotational speed of the second gears 66 and 68 It includes a measuring unit 70 for measuring the falling length of the support rods (52, 54).

As such, the height measuring unit 60 checks the gradient by measuring the height of the support rods 52 and 54 when the support rods 52 and 54 touch the bottom surface of the step 20, and the gradient is not correct. In this case, by fine-adjusting the height of the support rods (52, 54) to precisely match the gradient of the expansion joint device (100).

Figure 3 is a perspective view of the expansion joint according to an embodiment of the present invention, Figure 4 is a cross-sectional view of the expansion joint according to an embodiment of the present invention, Figure 5 is a expansion joint according to an embodiment of the present invention Side view.

3 to 5, the expansion joint device 100 according to an embodiment includes a surface rubber 120 and a surface layer disposed on the stepped portion 20 formed on the slab 10 on the bridge deck 105. A support block 125 disposed on both sides of the rubber 120 to support the surface rubber, an anchor bar 126 connected to both sides of the support block 125 to support the support block 125, and a support block The support plate 130 is installed on the inner surface of the 125 and the bottom surface of the surface rubber 120 is seated, and the support rods 52 and 54 are vertically adjustable to the surface rubber and the support plate.

Surface rubber 120 is formed of a porous rubber material is installed so that the upper surface is exposed to the outside, is fixed in the compressed state between the support block 125 and fixed to the support block 125 by the connecting member 123 do.

One surface of the surface rubber 120 is formed with an uneven surface, it may be laminated in a multi-layer disposed to be engaged with each other on the uneven surface. That is, the surface rubber 120 is formed with one or both sides of the concave-convex surface to stack the concave-convex portions interlocked with each other to prevent movement by the vibration or shock transmitted from the vehicle when the vehicle passes. In addition, the surface rubber 120 is formed with a plurality of openings so that rain water and the like can be discharged downward.

The support block 125 is formed of a flat member disposed on both sides of the surface rubber 120 vertically, and the connection member 123 is disposed on the side of the support block 125 to support the surface rubber 120. 125).

The support block 125 is preferably formed of a metal material on which the magnetic force acts so that the magnetic force of the electromagnets 42 and 44 can act.

The anchor bar 126 serves to provide a pressing force to the support block 125 in the lateral direction, and is fixed to the rebar 30 by welding or the like.

Here, the reinforcing bar 30 may be composed of a reinforcing bar 127 disposed in a lattice form at regular intervals horizontally on the anchor bar 126, and an anchor bar 128 supporting a load of the anchor bar 126. have.

The support plate 130 is disposed on the inner side of the support block 125 to support the lower end of the surface layer rubber, and the bottom plate of the support plate 130 is provided with a rib plate 135 to support the load applied to the support plate 130. .

In addition, a drain pipe 148 may be installed on the bridge upper plate 105, and a sound absorbing member 140 may be installed on the drain pipe 148. The sound absorbing member 140 is recessed on a surface adjacent to the drain pipe 148 to form a flow path 145 through which water passes, and the water passing through the opening of the surface rubber 120 flows as shown by arrow A. 145 is moved to the drain pipe 148.

The support rods 52 and 54 are installed to penetrate the surface rubber 120 and the support plate 130 to support the entire expansion joint device.

The expansion joint described above shows one embodiment of the expansion joint device constructed by using the expansion joint factory according to the present embodiment, and the expansion joint device may be applied to various types of expansion joint devices in addition to this structure.

The expansion joint construction method using such expansion joint factory values will be described in detail below.

6 to 11 is a process flow chart sequentially showing the expansion joint construction method according to an embodiment of the present invention.

First, as shown in FIG. 6, the expansion joint installed in the bridge slab 10 is removed. That is, the upper end concrete and the asphalt concrete of the end portion of the bridge slab 10, the existing expansion joint is installed in accordance with the expansion joint replacement section (H) to form the step portion (20). At this time, the bottom surface of the stepped portion 20 should be formed in a horizontal plane.

Therefore, as shown in FIG. 7, the planarization operation is performed to form the bottom surface of the step portion 20 in a horizontal plane. That is, the flattening operation is performed by pouring or chipping the mortar 22 on the bottom surface of the stepped portion 20.

Of course, if the bottom surface of the stepped portion 20 can be formed horizontally when removing the concrete and ascon, a process of flattening the bottom surface of the turn portion 20 is unnecessary.

Then, as shown in Figure 8, the reinforcing bar reinforcement for assembling and processing the reinforcing bar 30 on the bottom surface of the step 20. Reinforcing bar (30) When the reinforcement after placing the concrete on the stepped portion 20, as well as the armature when installing the expansion joint device 100, the support rod (52) of the expansion joint device (100) to the reinforcing bar 30 54) to fix it.

And, as shown in Figure 9, using the electromagnet mounting unit 40 to mount the expansion joint device 100 on the upper side of the step portion (20). In other words, when the controller 46 is operated to apply power to the first electromagnet 42 and the second electromagnet 44, the first electromagnet 42 and the second electromagnet 44 become magnetic, and the electromagnet 42, The first electromagnet 42 and the second electromagnet 44 are attached to both ends of the expansion joint device 40 by the magnetic force of 44.

At this time, the first electromagnet 42 and the second electromagnet 44 are both ends of the expansion joint is attached to the lower surface of the first electromagnet 42 and the second electromagnet 44 because it spans the upper surface of the bridge slab 10 The device 100 may be mounted with the same gradient as that of the bridge slab 10.

When the expansion joint 100 is completed by the electromagnet mounting unit 40 is completed, the support rods (52, 54) installed in the corner of the expansion joint 100 is lowered to the bottom surface of the step 20 Allow support rods 52 and 54 to reach.

When the lowering of the supporting rods 52 and 54 is completed, the heights of the supporting legs 52 and 54 are measured by the height measuring unit 60. That is, when the support legs 52 and 54 are lowered, the first gear 64 geared to the gear tooth 62 formed on one surface of the support legs 52 and 54 is rotated, and the first gear 64 and the gear are rotated. The plurality of stitched second gears 66 and 68 are rotated, and the rotation speed of the second gear 68 is measured by the measuring unit 70 to measure the height of the support rods 52 and 54.

Check the gradient by checking the height of the support rods (52, 54), and if the grade is not correct, finely adjust the height of the support legs to accurately match the gradient of the expansion joint to match the slope of the bridge slab (10).

In this way, after aligning the gradient of the expansion joint device 100 is fixed to the support rods (52, 54) to the rebar (30). The fixing operation of the support rods 52 and 54 can be fixed to the rebar by welding or the like. In this case, when the expansion joint device 100 according to the embodiment described above is installed, the anchor bar 126 and the rebar 30 are fixed by welding or the like.

Then, the height measuring unit 60 and the electromagnet mounting unit 40 is separated from the expansion joint device (100). That is, the controller 46 is operated to turn off the power applied to the first electromagnet 42 and the second electromagnet 44, and then the first electromagnet 42 and the second electromagnet 44 are separated, and the support rod ( 52, 54) to separate the first gear (64) to separate the height measuring unit (60).

As shown in FIG. 10, the mortar 80 is poured onto the stepped portion 20 to fix the expansion joint 100 to the bridge slab 10. At this time, mortar 80 is used as a superhard mortar hardening in a short time.

And, as shown in FIG. 11, when the mortar hardening is completed, if the upper end portion 82 of the support legs 52, 54 protruding upward of the expansion joint device 10 is cut, the replacement of the expansion joint device is completed. do.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limited to the embodiments set forth herein. Various changes and modifications may be made by those skilled in the art.

10: bridge slab 20: stepped portion
30: rebar 40: electromagnet mounting unit
42: first electromagnet 44: second electromagnet
46: controller 52, 54: support rod
60: height measuring unit 62: gear teeth
64: first gear 66,68: second gear
70: measuring unit 80: mortar
100: expansion joint 105: bridge deck
120: surface rubber 125: support block
130: support plate 126: anchor bar

Claims (4)

Reinforcing bars are reinforced on the bottom surface of the stepped portion that the bottom surface is formed horizontally at the end of the bridge slab;
Electromagnet mounting unit for mounting the expansion joint to the slope of the bridge slab using the magnetic force of the electromagnet on the stepped portion; And
Extension joint construction device for a bridge comprising a height measuring unit for measuring the height of the support rod of the expansion joint. The method of claim 1,
The electromagnet mounting unit is a first electromagnet for attaching the upper surface of one edge of the expansion joint device with magnetic force, a second electromagnet for attaching the upper surface of the other edge of the expansion joint device with magnetic force, and applied to the first electromagnet and the second electromagnet An expansion joint construction apparatus for a bridge comprising a controller for controlling the first electromagnet and the second electromagnet by turning on / off the power supply. The method of claim 1,
The height measuring unit is a gear tooth formed in the longitudinal direction of the support rod on at least one surface of the plurality of support rods,
A first gear geared to the gear tooth;
A plurality of second gears geared to the first gear;
The expansion joint construction apparatus of the bridge including a measuring unit installed on the second gear to measure the rotational speed of the second gear to measure the height of the support rod. The method of claim 1,
The expansion joint is a surface rubber disposed on the stepped portion formed in the bridge slab,
A support block disposed on both sides of the surface rubber to support the surface rubber;
An anchor bar connected to both sides of the support block to provide a transverse pressing force to the support block;
A support plate installed on an inner surface of the support block and seating a lower surface of the surface rubber;
An extension joint construction apparatus for a bridge, characterized in that it comprises a support rod vertically adjustable to the surface rubber and the support plate.

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