KR101589430B1 - End Gird Sliding Type Device for expansion joint of bridge - Google Patents

Abstract

The present invention relates to a stretch joint device for a bridge, and more particularly to a stretch joint device for a bridge, in which a stretch is formed at each end of a slab or a girder without elongating and contracting in a slip between the slab or girder end and the end, .
To this end, the present invention comprises an end protection support which is fixed by stud bolts to a non-shrinkage mortar layer laid on each end of a slab or girder of a bridge; An elastic member attached to an upper surface of the horizontal plate of the end portion protective support; A cover plate for sealing both end portions of the elastic member and the slab or between the ends of the girder and the end portion; A release preventing means for preventing the release of the cover plate by interrupting or interrupting the upper surface of the cover plate; A water-tub drain disposed at the bottom of the cover plate and connected between the outer lateral plates of the end protective support; Wherein the elastic expansion and contraction space is formed as a stretchable space in which both ends of the cover plate and the inner vertical plate of the end portion protective support are elongated while maintaining a constant distance therebetween.

Description

[0001] The present invention relates to an expansion joint for a bridge,

The present invention relates to a stretch joint device for a bridge, and more particularly to a stretch joint device for a bridge, in which a stretch is formed at each end of a slab or a girder without elongating and contracting in a slip between the slab or girder end and the end, .

In general, the upper structure of bridges is designed to absorb the deformation of structures such as temperature change, drying shrinkage, creep, and to minimize the impact caused by the vehicle load and smooth running of the vehicle. And a telescopic joint device for performing the function is installed.

Particularly, in the case of a bridge in which a vehicle passes or a railroad passage is made, the expansion joint device should be able to accommodate the horizontal and vertical movements and the rotational behavior according to the static and dynamic behavior of the structure, And should be waterproof enough to effectively block penetration of water or sand as well as durability.

Conventionally, the expansion joint device for bridges is designed and constructed so that the expansion and contraction can be performed mainly in the slab or in the slag between the end portion and the end portion of the girder. For example, Korean Patent Application Publication No. 1999-003295 (1999.01.15) Discloses an expansion joint structure of a bridge top plate and a construction method thereof.

In the case of the expansion joint device in which the expansion and contraction is carried out in the slag or between the end portion of the girder and the end portion, a vehicle or railway passes directly above the portion where the expansion joint device is to be stretched, It has a disadvantage that it is vulnerable to a load such as an easily damaged portion due to a repeated load.

That is, in the conventional expansion joint, there is a disadvantage that the expansion and contraction portion is vulnerable to a load such as being easily damaged as a load is concentrated directly on a portion where expansion and contraction is performed when a vehicle or a railway or the like is passing.

Further, when the slab or the girder is elongated or expanded in the slag between the end portions, the drainage of rainwater or the like is made too fast and easily through the gap where the slab is stretched, so that the drainage path disposed below the slab is overflowed, There is a problem that the waterproof function is deteriorated due to infiltration by a pier or an alternate.

In addition, there is a problem that the drainage hole disposed between the end portion of the slab or the end portion of the girder and the drainage port disposed below the slope can not be repaired and the drainage port is clogged.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a slab or girder which is not elongated or expanded in a slurry between ends of a slab or a girder, The present invention has been made in view of the above problems, and it is an object of the present invention to provide an expansion joint device for a bridge capable of providing a strong structure against a load without being exposed to the outside.

It is another object of the present invention to provide a method of installing a cover plate on a vehicle, such as a vehicle, a railway or the like, It is in point.

It is still another object of the present invention to provide an elastic member at both ends of a cover plate which forms each end of a slab or a girder and an expansion joint space, so that a load acting on the cover plate can be buffered.

According to an aspect of the present invention, there is provided a bridge structure for a bridge, comprising: a bridge extension / contraction means installed between an end portion and an end portion of a slab or a girder of a bridge so as to form a telescopic space in each end of the slab or girder, The present invention provides a stretch joint for bridges.

In a preferred embodiment of the present invention, the bridge expansion / contraction means comprises: a horizontal plate, an inner vertical plate extending upward from the inner end of the horizontal plate, and an outer vertical plate extending downward from the outer end of the horizontal plate An end protection support which is fixed to the non-shrinkage mortar layer by stud bolt, which is installed at each end of the slab or girder of the bridge; An elastic member attached to an upper surface of the horizontal plate of the end portion protective support; A cover plate for sealing both end portions of the elastic member and the slab or between the ends of the girder and the end portion; A release preventing means for preventing the release of the cover plate by interrupting or interrupting the upper surface of the cover plate; A water-tub drain disposed at the bottom of the cover plate and connected between the outer lateral plates of the end protective support; And an expansion / contraction space formed between the opposite end portions of the cover plate and the inner vertical plate of the end portion protective support while maintaining a constant distance therebetween.

Preferably, the cover plate is constituted by a first cover plate and a second cover plate of the same size, and each of the outer ends of the first cover plate and the second cover plate, which are located on the flow channel, And is bolted.

According to a preferred embodiment of the present invention, the elastic member comprises: an elastic pad attached to an upper surface of the horizontal plate of the end portion protective support; A supporting steel plate laminated on the elastic pad to support both ends of the cover plate; .

According to a preferred embodiment of the present invention, the departure-avoiding means is adopted as a cover plate for preventing a cover plate from falling off, which is connected to the inner vertical plate of the end portion protective support while covering the expansion / contraction space and being in close contact with both ends of the cover plate. do.

Preferably, the covering plate for preventing the cover plate from falling off is formed with a cleaning hole for airbrushing through the expansion and contraction space.

More preferably, the cover plate has a locking groove formed in a bottom surface of the cover plate, and a locking pin slidably locked in the locking groove is formed integrally with the cover plate. do.

According to another preferred embodiment of the present invention, the departure-avoiding means is adopted as a release preventing spring which is connected between the bottom surface of the cover plate and the outer vertical plate of the end portion protective support.

In addition, when the release prevention spring is adopted, the expansion and contraction sealant is filled in the expansion and contraction space between both end portions of the cover plate and the inner vertical plate of the end portion protective support.

Through the above-mentioned means for solving the problems, the present invention provides the following effects.

First, since the bridge is not elongated or expanded in the slag between the slab or girder end portion and the end portion of the slab or girder as in the conventional art, the actual stretchable portion is not exposed to the outside, Provides robust advantages over cyclic loading.

Secondly, both end portions of the cover plate, which are brought into contact with each other when passing through an actual vehicle or a railway, are detachably mounted to the expansion and contraction space via elastic members, so that repeated loads such as a vehicle and a railway are received by the cover plate, It can be buffered and offset.

Third, since the cover plate can be attached and detached, it is possible to smoothly carry out the maintenance work on the water-receptacle drainage port at the time of detachment, and to smoothly carry out the foreign matter cleaning operation with respect to the extension and contraction space, .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional perspective view of a telescopic joint for a bridge according to a first embodiment of the present invention;
2 is a cross-sectional perspective view of a telescopic joint device for a bridge according to a second embodiment of the present invention,
3 is a cross-sectional perspective view showing a telescopic joint device for a bridge according to a third embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the present invention, unlike the conventional bridge stretching joint apparatus in which a bridge is elongated and expanded at a slant or a slant between a girder end and an end, a bridge is stretched at each end of the slab or girder, And it is intended to provide a stable and stable bridge expansion and contraction structure to the load.

First Embodiment

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional perspective view illustrating a telescopic joint device for a bridge according to a first embodiment of the present invention; FIG.

In Fig. 1, reference numeral 10 denotes an end protection support.

The end portion protective supports 10 are provided at each end of a slab or girder 100 of a bridge which is fixed by a stud bolt 104 to a non-shrinkage mortar layer 102 laid on each end of the slab or girder 100 of the bridge It is adopted as an iron structure to make bridge shrinkage.

To this end, the end portion protective support 10 includes a horizontal plate 12, an inner vertical plate 14 extending upward from the inner end of the horizontal plate 12, And an outer vertical plate 16 extending downward from the end and being integrally formed.

The bottom surface of the horizontal plate 12 of the end portion protective support 10 and the outer surface of the inner vertical plate 14 and the inner surface of the outer vertical plate 16 are inserted into the respective ends of the slab or girder 100 of the bridge Shrinkage mortar layer 102 and is fixed by a stud bolt 104. [

At this time, an elastic member 20 is attached to the upper surface of the horizontal plate 12 of the end portion protective support 10.

The elastic member 20 preferably includes an elastic pad 22 attached to the upper surface of the horizontal plate 12 of the end protective support 10 to provide a buffering force against the load, And a supporting steel plate 24 for supporting both ends of the cover plate 30 in close contact with each other.

Both ends of the cover plate 30 are mounted on the elastic member 20, that is, the supporting steel plate 24. The center portion of the cover plate 30 is positioned between the end portions of the slabs or the girders 100, Thereby sealing the flow path 110.

According to the first embodiment of the present invention, the cover plate 30 is integrally formed without being divided into the first cover plate 31 and the second cover plate 32, (40) is provided with a cover plate (41) for preventing the cover plate from coming off.

The end protection support 10 is thus fixed to the non-shrinkage mortar layer 102 punched at each end of the slab or girder 100 of the bridge with the stud bolts 104, Both ends of the integral cover plate 30 are mounted on the elastic member 20 after the step of attaching the elastic member 20 to the upper surface of the horizontal plate 12 of the slab or girder 100, Thereby sealing the flow field 110, which is an interspace.

1, a separate coupling end 18, which is vertically bent at the rear end of the end protection support 10, is formed integrally with the coupling end 18, The rear end portion of the plate 41 is brought into close contact with the rear end portion of the plate 41 and then the release preventing lid plate 41 and the coupling end 18 are mutually engaged with screws 46 or bolts.

The release preventing means 40 according to the first embodiment of the present invention includes a cover plate detachment member 40 which is in close contact with the upper surfaces of both end portions of the integral cover plate 30 and which is connected to the inner vertical plate 14 of the end protection support 10, Preventive cover plate 41 is configured in a composite structure, so that the cover plate 30 is maintained in a rigid state without being displaced from its original position.

In order to prevent foreign matter from accumulating in the expansion and contraction space 60 in the first embodiment of the present invention, the expansion and contraction sealant 62 is filled in the expansion and contraction space 60, The expansion and contraction sealant 62 expands or shrinks.

Therefore, a bridge elongation which shrinks or expands due to temperature change, drying shrinkage, creep, or the like occurs in the upper structure (slab, etc.) of the bridge, and the expansion and contraction of the bridge at this time occurs in a stretching space 60 ).

More specifically, at the time of expansion and contraction of the bridge, the end portion protective support 10 coupled to the slab or girder 100 is expanded toward the cover plate 30, so that both end portions of the stopper cover plate 30, The expansion and contraction process of the bridge inserted into the slab or the girder 100 is performed while the end portion protective support 10 coupled to the slab or the girder 100 is contracted during the contraction and expansion of the bridge, A shrinking and contracting process of a bridge that both ends exit from the expansion and contraction space 60 is performed.

In this way, since the expansion and contraction of the bridge is performed in the expansion and contraction space 60 formed at each end of the slab or girder, the actual expansion and contraction portion is not exposed to the outside, thereby preventing the expansion and contraction portion from being damaged by external force. Since the actual expansion and contraction portion is not exposed to the outside, it is possible to provide the advantage of being robust against cyclic loads such as vehicles and railways, because the expansion and contraction of the bridge is performed in the expansion and contraction space 60 formed at each end of the slab or girder

Second Embodiment

FIG. 2 is a cross-sectional perspective view of a telescopic joint device for a bridge according to a second embodiment of the present invention.

In Fig. 2, reference numeral 10 denotes an end protection support.

The end portion protective supports 10 are provided at each end of a slab or girder 100 of a bridge which is fixed by a stud bolt 104 to a non-shrinkage mortar layer 102 laid on each end of the slab or girder 100 of the bridge It is adopted as an iron structure to make bridge shrinkage.

To this end, the end portion protective support 10 includes a horizontal plate 12, an inner vertical plate 14 extending upward from the inner end of the horizontal plate 12, And an outer vertical plate 16 extending downward from the end and being integrally formed.

The bottom surface of the horizontal plate 12 of the end portion protective support 10 and the outer surface of the inner vertical plate 14 and the inner surface of the outer vertical plate 16 are inserted into the respective ends of the slab or girder 100 of the bridge Shrinkage mortar layer 102 and is fixed by a stud bolt 104. [

At this time, an elastic member 20 is attached to the upper surface of the horizontal plate 12 of the end portion protective support 10.

The elastic member 20 preferably includes an elastic pad 22 attached to the upper surface of the horizontal plate 12 of the end protective support 10 to provide a buffering force against the load, And a supporting steel plate 24 for supporting both ends of the cover plate 30 in close contact with each other.

Both ends of the cover plate 30 are mounted on the elastic member 20, that is, the supporting steel plate 24. The center portion of the cover plate 30 is positioned between the end portions of the slabs or the girders 100, Thereby sealing the flow path 110.

More specifically, the cover plate 30 is composed of a first cover plate 31 and a second cover plate 32 of the same size, and the inner end of the first cover plate 31 and the second cover plate 32 Is mounted on the supporting steel plate 24 of the elastic member 20 and the outer ends of the first cover plate 31 and the second cover plate 32 are releasably engaged with each other .

At this time, the upper and lower edges of the outer ends of the first cover plate 31 and the second cover plate 32 which are in contact with each other are closely adhered to each other and then the bottom plate 33 and the first cover plate 31, And the slats 33 and the second cover plate 32 are bolted to the bolts.

According to the present invention, both end portions of the cover plate 30, that is, the outer end portions of the first cover plate 31 and the second cover plate 32, and the outer end portions of the end portion protective supports 30, (60) in which the expansion and contraction of the bridge is substantially maintained while maintaining a constant distance between the inner vertical plates (14) of the inner casing (10).

Therefore, a bridge elongation which shrinks or expands due to temperature change, drying shrinkage, creep, or the like occurs in the upper structure (slab, etc.) of the bridge, and the expansion and contraction of the bridge at this time occurs in a stretching space 60 ).

More specifically, at the time of expansion and contraction of the bridge, the end portion protective support 10 coupled to the slab or girder 100 is expanded toward the cover plate 30, so that both end portions of the stopper cover plate 30, The expansion and contraction process of the bridge inserted into the slab or the girder 100 is performed while the end portion protective support 10 coupled to the slab or the girder 100 is contracted during the contraction and expansion of the bridge, A shrinking and contracting process of a bridge that both ends exit from the expansion and contraction space 60 is performed.

As described above, since the expansion and contraction of the bridge is performed in the expansion and contraction space 60 formed at each end of the slab or the girder, the actual expansion and contraction portion is not exposed to the outside, thereby preventing the expansion and contraction portion from being damaged by external force.

The load applied to the cover plate 30 is absorbed by the elastic pad 22 of the elastic member 20 so that the load applied to the cover plate 30 It is possible to provide a flexible joint for a bridge which is robust against a load.

That is, since both end portions of the cover plate which are in contact with each other when passing through an actual vehicle and a railroad are placed on the elastic member 20, repeated loads such as a vehicle and a railway are applied to the cover plate, .

On the other hand, on the upper surface of the cover plate 30, there is provided a release preventing means 40 for preventing the cover plate 30 from coming off.

The release preventing means 40 according to the second embodiment of the present invention covers the elongating and contracting space 60 and at the same time is provided at both ends of the cover plate 30, that is, on the upper surfaces of both ends of the first cover plate 31 and the second cover plate And is used as a covering plate 41 for preventing the cover plate from coming off and being connected to the inner vertical plate 14 of the end portion protective support 10.

A locking groove 43 is formed on the bottom surface of the cover plate 41 for preventing the cover plate 40 from being slid and a lock The fins 44 are integrally protruded.

Therefore, the cover plate 30 is vertically locked by the cover plate 41 for preventing the cover plate 30 from being separated from the top and bottom of the cover plate 30, The cover plate 30 can be prevented from slipping leftward and rightward due to the structure in which the cover plate 30 is slidably locked so that the cover plate 30 is maintained in the position without departing from the position.

At this time, a cleaning hole 42 for airbrushing is formed in the covering plate 41 for preventing the cover plate from being separated from the expansion and contraction space 60, and is normally closed by using a screw or the like.

When foreign matter or the like accumulates in the stretchable space 60 and becomes an obstacle to the elongation and contraction of the bridge, the screw is loosened to open the cleaning hole 42 and then the high-pressure air is injected to remove the foreign substance. It is possible to smoothly maintain the expansion and contraction of the bridge.

Meanwhile, a water-based drain port (50) disposed at the bottom of the cover plate (30) is connected between each of the outer vertical plates (16) of the end portion protective support (10), and water infiltrated through the joint clearance of the cover plate (Not shown).

If foreign matters are accumulated in the water-receptacle drain port 50 and the drainage is not smooth, the bolted vanes 33 are loosened at the respective outer ends of the first cover plate 31 and the second cover plate 32, The second cover plates 31 and 33 can be separated and the foreign matter in the water-receptacle opening 50 exposed under the second cover plates 31 and 33 can be easily cleaned.

Third Embodiment

The third embodiment of the present invention is the same as the configuration and operation of the second embodiment described above, except that the departure prevention means 40 is adopted in a different structure.

The release preventing means 40 according to the third embodiment of the present invention is adopted as a release preventing spring 45 connected between the bottom surface of the cover plate 30 and the outer vertical plate 16 of the end protective support 10. [

More specifically, according to the third embodiment of the present invention, in a state in which the cover plate 41 for preventing the release of the cover plate, which is the release preventing means 40 according to the second embodiment of the present invention, (45) is connected between the bottom surface of the end support plate (30) and the outer vertical plate (16) of the end support support (10).

Therefore, the cover plate 30 can be prevented from vertically and laterally deviating due to the resilient restoring force of the release preventing spring 45, so that the cover plate 30 maintains its position without departing from the position .

When the release preventing spring 45 is employed as the release preventing means 40 according to the third embodiment of the present invention, since the cover plate 41 for preventing the cover plate from being detached is excluded, So that the foreign matter can be accumulated,

Therefore, when the release preventing spring 45 is employed as the release preventing means 40 according to the third embodiment of the present invention, it is preferable to fill the expansion and contraction sealant 62 in the expansion and contraction space 60, The expansion and contraction sealant 62 filled in the expansion and contraction space 60 upon expansion and contraction is expanded or contracted.

On the other hand, a coating layer may be formed on the release preventing spring 45. The reason why the release preventing spring 45 is coated with ceramic is that the oxidation resistance is improved and the life is prolonged. Compared to chrome plating or nickel chrome plating, the ceramic coating is excellent in corrosion resistance, scratch resistance, abrasion resistance, impact resistance and durability.

The coating layer is coated on the periphery of the separation preventing spring 45 with a mixture of 96 to 98 wt% of chromium oxide (Cr ₂ O ₃ ) and ₂ to 4 wt% of titanium dioxide (TiO ₂ ).

Chromium oxide (Cr ₂ O ₃ ) acts as a passivity layer to block oxygen entering the inside of the metal, thereby preventing rusting.

Titanium dioxide (TiO ₂ ) is a white pigment because it is very stable physicochemically and has high hiding power. And is also widely used for ceramics having high refractive index because of high refractive index. And has characteristics of photocatalytic property and superhydrophilic property. Titanium dioxide (TiO ₂ ) acts as an air purification function, an antibacterial function, a harmful substance decomposition function, a pollution prevention function, and a discoloration prevention function. This titanium dioxide (TiO ₂ ) ensures that the coating layer covers the periphery of the separation preventing spring 45, and dissolves and removes the foreign matter adhered to the separation preventing spring 45 to prevent damage to the separation preventing spring 45 .

Here, chromium oxide (Cr ₂ O ₃₎ and when using hayeoseo mixing titanium dioxide (TiO _2), the mixing ratio of these, chrome oxide (Cr ₂ O ₃₎ Titanium dioxide (TiO ₂₎ in 96-98% by weight 2 By weight to 4% by weight.

When the mixing ratio of chromium oxide (Cr ₂ O ₃ ) is less than 96 to 98% by weight, the coating of chromium oxide (Cr ₂ O ₃ ) is often broken in an environment such as a high temperature, The rust prevention effect of the fuel cell 45 was reduced suddenly.

When the mixing ratio of titanium dioxide (TiO ₂ ) is less than 2 to 4 wt%, the effect of titanium dioxide (TiO ₂ ) is insignificant so that the purpose of mixing it with chromium oxide (Cr ₂ O ₃ ) is discolored. That is, titanium dioxide (TiO ₂ ) dissolves and removes foreign matter adhering to the periphery of the escape prevention spring 45 to prevent the escape prevention spring 45 from being corroded or damaged. When the mixing ratio is 2 to 4 wt% , There is a problem that it takes much time to disassemble the attached foreign matter.

Therefore, since the coating layer having excellent oxidation resistance is formed around the release preventing spring 45 frequently exposed to the outside, oxidation of the release preventing spring 45 is prevented and oxidation of the release preventing spring 45 is prevented, The life span of the jointing device is extended and the maintenance cost is reduced.

Further, RD (Polymerized trimethyl dihydroquinoline) may be added to the elastic pad 22 to increase the oxidation resistance. These RDs increase resistance to ozone and oxidation, and prevent corrosion and oxidation of the elastic pad 22.

The present invention preferably includes 0.4 to 1.2 parts by weight of RD in the main material of the elastic pad 22. This is because if the addition amount of RD is less than the above-mentioned range, it is difficult to obtain oxidation resistance, and if it exceeds the above-mentioned range, the density and firmness of the tissue are affected.

Since RD is further added to the main material of the elastic pad 22, the oxidation resistance of the present invention is greatly improved, thereby maximizing the service life of the product.

10: end protection support
12: Horizontal plate
14: Inner vertical plate
16:
18: Coupling stage
20: Elastic member
22: Elastic pad
24: Supported steel plate
30: Cover plate
31: first cover plate
32: second cover plate
33:
40:
41: cover plate preventive cover plate
42: Cleaning hole
43: Locking groove
44: Lock pin
45: Spring for escape prevention
46: Screw
50: Water basin drainage
60: New space
62: stretch sealant
100: Slab or girder
102: Non-shrinkage mortar layer
104: Stud bolt
110: Milky Way

Claims (9)

A bridge stretching means is provided between each end and each end of the slab or girder 100 of the bridge so that a stretchable space 60 is formed within each end of the slab or girder 100 for bridge elongation;
The bridge extension / contraction means comprises:
An inner vertical plate 14 extending upward from the inner end of the horizontal plate 12 and an outer vertical plate 16 extending downward from the outer end of the horizontal plate 12 integrally An end protection support 10 provided with a formed structure and fixed by stud bolts 104 to a non-shrinkage mortar layer 102 laid on each end of the slab or girder 100 of the bridge;
An elastic member 20 attached to an upper surface of the horizontal plate 12 of the end portion protective support 10;
A cover plate (30) sealing both end portions of the slab or girder (100) between ends of the slab or girder (100) and end portions thereof;
(40) for preventing the cover plate (30) from disengaging by interrupting the upper surface of the cover plate (30) or interrupting the bottom surface thereof;
And a water-based drain port (50) connected between each of the outer vertical plates (16) of the end portion protective support (10) and disposed at the bottom of the cover plate (30)
Between the opposite end portions of the cover plate 30 and the inner vertical plate 14 of the end portion protective support 10 is formed as a stretchable space 60 in which expansion and contraction are maintained while maintaining a certain distance;
The departure prevention means (40) comprises:
A cover plate (41) covering the extensible space (60) and being connected to the inner vertical plate (14) of the end protective support (10) while being in close contact with the upper surfaces of both ends of the cover plate (30);
And a cleaning hole (42) for airbrushing the expansion and contraction space (60) is formed through the cover plate (41) for preventing the cover plate from falling off.
A bridge stretching means is provided between each end and each end of the slab or girder 100 of the bridge so that a stretchable space 60 is formed within each end of the slab or girder 100 for bridge elongation;
The bridge extension /
An inner vertical plate 14 extending upward from the inner end of the horizontal plate 12 and an outer vertical plate 16 extending downward from the outer end of the horizontal plate 12 integrally An end protection support 10 provided with a formed structure and fixed by stud bolts 104 to a non-shrinkage mortar layer 102 laid on each end of the slab or girder 100 of the bridge;
An elastic member 20 attached to an upper surface of the horizontal plate 12 of the end portion protective support 10;
A cover plate (30) sealing both end portions of the slab or girder (100) between ends of the slab or girder (100) and end portions thereof;
(40) for preventing the cover plate (30) from disengaging by interrupting the upper surface of the cover plate (30) or interrupting the bottom surface thereof;
And a water-based drain port (50) connected between each of the outer vertical plates (16) of the end portion protective support (10) and disposed at the bottom of the cover plate (30)
Between the opposite end portions of the cover plate 30 and the inner vertical plate 14 of the end portion protective support 10 is formed as a stretchable space 60 in which expansion and contraction are maintained while maintaining a certain distance;
The departure prevention means (40)
(45) connected between the bottom surface of the cover plate (30) and the outer vertical plate (16) of the end portion protective support (10).
The method according to claim 1 or 2,
The cover plate 30 is composed of a first cover plate 31 and a second cover plate 32 of the same size and has a first cover plate 31 and a second cover plate 31 positioned above the flow- 32) are covered with the slats (33) and are bolted to the slats (33).
The method according to claim 1 or 2,
The elastic member (20) comprises:
An elastic pad 22 attached to the upper surface of the horizontal plate 12 of the end portion protective support 10;
A supporting steel plate 24 laminated on the elastic pad 22 to support both ends of the cover plate 30;
Wherein the first and second shafts are connected to each other.
delete delete The method according to claim 1,
A locking groove 43 is formed in the bottom surface of the cover plate 41 for preventing the cover plate 40 from slipping off and a lock pin 43 is slidably locked in the lock groove 43 at both ends of the upper surface of the cover plate 30 44) are formed integrally with each other.
delete The method of claim 2,
When the release preventing spring 45 is employed, the expansion and contraction sealant 62 is filled in the expansion and contraction space 60 between both end portions of the cover plate 30 and the inner vertical plate 14 of the end portion protective support 10 It is characterized by the expansion joint for bridges.

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