KR20170082318A - Elastic recovering type expansion joint and the construction method therefor - Google Patents

Abstract

The present invention relates to a stretch joint device which is constructed so that a road pavement material (asphalt or concrete pavement material) laid on an upper part of a concrete structure does not cause a step or a crack. In the stretch joint device, A resilient restoring type expansion joint installed in an upper portion of the concrete structure to be fixed to an upper surface of the step portion by a fastener; The elastic restoring type expansion joint material includes an elliptical or circular body portion and a fixing plate extending to both sides of the body portion and fixed to the step portion.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an elastic restoring type expansion joint,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic restoring type expansion joint device and a construction method thereof. More specifically, the present invention relates to a stretch joint device which is constructed so that a step or crack does not occur in a road pavement material (asphalt or concrete pavement material) laid on a concrete structure due to expansion and contraction due to temperature change and the like in a bridge or underground roadway.

In general, in order to cope with the expansion and contraction of the bridge due to the temperature change, the upper plate of the bridge is divided into several parts in the longitudinal direction (longitudinal direction) in a wide bridge having a plurality of bridge piers. I have installed.

1A shows a conventional bridge type stretch joint device 60 for a bridge.

Such a conventional stretch joint device for bridges 60 includes a linear finger top plate 60a and 60b which are respectively installed to engage with each other at opposite ends of the divided bridge top plate portions and expand and contract according to a temperature change, An anchor 62 for fastening and fixing the upper plates 60a and 60b to the after concrete 61 and reinforcing bars 63 for increasing the binding force between the anchor 30 and the after concrete 61 and for reinforcing the strength of the after- Respectively.

In the conventional elastic joint device 60 for a bridge, the straight finger upper plates 60a and 60b are held in engagement with each other to absorb the expansion and contraction of the bridge according to temperature changes. However, A defect occurs.

For example, various foreign substances are injected into the interspace 12 of the finger top plate, maintenance and maintenance are not properly performed, and the longitudinal expansion and contraction of the bridge is hindered. As a result, do.

In addition, when smooth expansion and contraction of the bridge in the longitudinal direction and the lateral direction can not be performed according to the temperature change, the finger top plates facing each other are interfered with each other to receive a large force so that the force is transmitted to the post- It causes damage to the after-concrete.

In addition, since the joint surfaces of the finger upper plate and the after concrete are not attached tightly, the vibration occurs when passing through the vehicle, and thus voids are generated at the joint surface with the after concrete. Leaks may occur in the vicinity.

As shown in FIG. 1B, the non-drained expansion joint 50 is also provided with a waterproofing material (not shown) installed inside the expansion joint device Sealing material) is naturally bridged to the upper surface (bridging surface) of the slab of the bridge, for example, by using the longitudinal gradient of the bridges.

In the non-drainage expansion joint system, the waterproofing material is not formed into a U-shape favorable to the induction drainage but is extended in the form of a square block.

Referring to FIG. 1B, the waterproof sealing member 1 and the installation form used in the non-multiple expansion joint 50 will be described.

Steel angles 4 are provided on both sides of the concrete structure 51 in order to protect the structure head from the open portion 3 of the concrete structure and elastic concrete is installed between the steel angle 4 and the package 52 5) is installed.

At this time, on both sides of the waterproof sealing material 1 in the form of a square block which abuts against the steel material angle 4, a plurality of grooves (not shown) are formed on both sides of the waterproof sealing material 1 2 are formed in parallel,

An epoxy or the like is applied to the side surface of the waterproof sealing member 1 and the waterproof sealing member 1 is inserted between the steel angles 4 to be completely attached.

Further, the steel angle 4 is provided with the stud 6, and it is understood that the stud 6 is embedded in the elastic concrete 5 placed at the rear portion to form an integral body.

In addition to being installed on bridges, it also uses expansion joints to construct road structures such as underground roadways.

That is, after constructing the reinforced concrete structure constituting the bottom plate in the underground driveway at a predetermined interval (about 10 m to 100 m), the road construction material (ascon or concrete pavement) is installed at a predetermined thickness on the concrete structure. Road structures such as underground roadways also repeatedly expand and contract as the atmospheric temperature changes.

Therefore, the concrete structure and road pavement in the underground roadway are different from each other due to the variation of atmospheric temperature. Therefore, the concrete structure and road pavement material are separated and deformed by expansion or contraction according to the atmospheric temperature change. do.

Therefore, the expansion joint device installed on the road structure such as the underground roadway is formed by cutting the roadway wrapping material above the gap between the concrete structures to a predetermined width to form a cut portion, and an elastic joint material is installed in the cutout portion, The elastic joints expand or contract to prevent cracking of the road pavement.

Conventionally, a support member made of a steel plate is installed to cover the upper part of the gap between the concrete structures so that the elastic jointing material does not flow into the gap between the concrete structures when filling and installing the elastic jointing material in such a conventional expansion jointing device.

The surface of the concrete structure in contact with the support member made of steel is not flat. In the case of the soft ground, a step difference occurs between the concrete structures due to the uneven settlement. When the unevenness is present, the elastic jointing material adheres to the concrete structure And the bearing member and the concrete structure are separated from each other. As a result, since the shear load generated by the vehicle passes through the elastic jointing material or the road covering material to the support member made of steel, reflection cracks occur in the elastic jointing material, There is a problem that the structure does not play a role.

1C,

(S1) of cutting the road pavement material (20, asphalt or concrete pavement material) laid on the concrete structure (10) spaced apart by a predetermined gap to form a road pavement material cutting portion (21)

A step (S2) of cutting the concrete structure (10) to a predetermined width at a lower portion of the vertical wall of the road pavement material cutting portion (21) to form a concrete cut portion (13)

(S3) of inserting and installing first and second porous pipes (15, 17) in the gap (11) and the concrete cut portion (13) between the concrete structures after cleaning after cutting,

A step (S4) of attaching a cover (19) to an upper part of the second pipe (17) inserted in the concrete cut part (13) and closing the upper part of the opened concrete cut part (13)

A step (S5) of applying a primer to the bottom surface and both vertical walls of the road packaging material cutting portion (21)

A step (S6) of applying an elastic sealant (33) primarily on the primer,

(S7) of attaching the first flame retardant fiber member 31 to the bottom surface of the road pavement material cutting portion 21 and the entire vertical walls on both sides,

A step (S8) of applying a second-order elastic sealant 33 on the first flame retardant fiber member 31,

A step (S9) of placing an elastic joint material (30) in which the aggregate and the thermoplastic resin are mixed in the road pavement material cutting portion (21), compacting the compacted material with a compactor or the like,

Finally, an expansion joint device for an underground car is constructed by applying a finishing material 37 to the upper portion of the elastic coupling material 30 and finishing the coating (S10).

In other words, in order to absorb the expansion and contraction of the concrete structure while preventing the road pavement material (asphalt or concrete pavement material) laid on the concrete structure from being stepped or cracked, it is necessary to use an elastic material such as a coating aggregate and a rubber- (A kind of backing material) 33 and a porous pipe 15 for canceling the expansion and contraction of the concrete structure and drainage without leakage of the elastic coupling material to the gap 11, As shown in FIG.

However, the conventional expansion joints used in conventional bridges or underground roads as shown in Figs. 1A to 1C are inevitably inferior in durability as time elapses, and maintenance due to the occurrence of defects is inevitable. However, There is a limit in that the expansion joint used is complicated in construction and thus complicated in construction type and can not avoid an increase in costs due to the use of functional materials and materials.

Accordingly, the present invention provides an expansion joint device for use in a road pavement material (asphalt or concrete pavement material) laid on an upper part of a concrete structure, wherein the construction of the expansion joint device is simplified to a minimum, The present invention provides an economical and environmentally friendly resilient restoring type expansion joint device having excellent durability due to structural load transmission and dispersion, and to provide a construction method thereof.

In order to achieve the above object,

First, the lower part is inserted into a gap between concrete structures spaced apart from each other, so that the lower part is accommodated in a widening space of the road wrapping material formed on the upper part of the gap. The elastic restoring type expansion joint material having both sides fixed by the gap and the widened cut- And the inside of the widened cut portion is filled with a finishing material such as an elastic coupling material or a back-laid concrete, thereby completing the construction and a method of constructing the same.

Second, the elastic restoring type expansion joint material is made of a rubber material for absorbing a load during elastic deformation when a load is applied, preferably molded using a powdered waste tire, and a hollow portion is formed inside the elastic material to ensure sufficient durability .

Thirdly, both side portions of the elastic recovery type expansion joint material can be fixed by using a fixture such as an anchor in a gap (a step portion) formed in the gap of the concrete structure, and the elastic constructions are extended from both sides of the body portion of the elastic recovery type expansion / It is possible to form a fixed plate in the form of a horizontal plate so as to seal the gap, thereby making it possible to simplify the fixing installation.

To this end,

A concrete structure in which a gap and a widened cut portion above the gap are formed so as to form a step portion, the concrete structure being installed in the gap so as to sandwich the lower portion and being accommodated in the widened cut portion continuously formed with the widened cut portion on the upper surface of the concrete structure, An elastic restoring type expansion joint fixed by a fixture; And a finishing material formed to be embedded in the widened cut portion, wherein the elastic restoring type expansion joint has an elliptical or circular body portion and a fixing plate extending to both sides of the body portion and fixed to the step portion, And a method of constructing the same.

The elastic restoring type expansion joint device and the construction method thereof according to the present invention are completed by fixing a previously manufactured elastic recovery type expansion joint material and finishing materials such as an elastic joint material or a backfilled concrete using a filler material A more rapid and economical elastic restoring type expansion joint device and its construction method become possible.

Further, since the elastic restoration type expansion joint material is made of a rubber material molded using powdered waste tire, it is environmentally friendly and durability can be sufficiently ensured, thereby making it possible to provide a more efficient elastic recovery type expansion joint device and a construction method thereof.

In addition, the elastic restoring type expansion joint is made of a circular or elliptical hollow member, so that it is excellent in restoring force due to vehicle load and can provide durability, It is possible to provide an expansion joint device and a construction method thereof.

In addition, the elastic restoring type expansion joint material is accommodated in the space of the widening part of the road wrapping material formed at the upper part of the gap with the lower part fitted in the gap of the concrete structure, and the upper part is arranged to coincide with the upper surface of the road wrapping material. do.

1A is a construction view of a conventional fingers type expansion joint device for a bridge,
FIG. 1B is a view showing a construction of a non-deployable expansion joint device for a conventional bridge,
1C is a view showing the construction of a conventional expansion joint for underground car,
FIG. 2A is a perspective view of the elastic restoring type expansion joint according to the present invention,
FIG. 2B is an operational perspective view of the elastic restoring type expansion joint apparatus of the present invention, FIG.
FIGS. 3A and 3B are construction cross-sectional views of an elastic restoring type expansion joint according to the present invention,
Figs. 4A, 4B and 4C are constructional diagrams of the elastic restoring type expansion joint device of the present invention. Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

[The elastic restoring type expansion joint apparatus (100) of the present invention)

2A and 2B are a perspective view and an operational perspective view of the elastic restoring type expansion joint apparatus 100 of the present invention.

The elastic restoring type expansion joint 100 includes an elastic restoring type elastic expansion joint 110, a fixing member 120, and a finishing member 130.

The elastic restoring type elastic expansion joint material 110 is a rubber elastic expansion joint material made of a circular or elliptical cross section according to a vehicle load.

For example, the present invention may be embodied by a rubber-like body portion 111 formed to have a solid or hollow cross-section, but at the center thereof at least one hollow portion S is formed, And a fixing plate 112 that is fixed to the base plate.

Preferably, powder hollow tires are used to form the hollow portion S in the interior, thereby ensuring sufficient durability.

The hollow portion S of the body portion 111 serves to prevent deformation of the body portion 111 due to a vehicle load and to prevent cracking due to excessive deformation, and also to reduce the weight.

Therefore, it is possible to use the one made of the extension length L corresponding to the extension length of the elastic recovery type expansion joint 100, but the rubber material makes it easy to install because it is easy to cut if necessary.

The reason why the body portion 111 is formed in a circular or elliptical shape is that the vehicle load acting from the upper surface is transmitted to the left and right sides so that the load applied to the body 130 by the finishing material 130 such as an elastic joint material or a post- P to be easily dispersed to the side P1.

2B, the body 111 includes a widened cut portion 210 and 310 formed on the gap 220 with the lower portion 111a fitted in the gap 220 of the concrete structure 300 spaced apart from each other, And the fixing plate 112 is fixed to the step portion 230 formed by the gap 220 and the widened cut portion 310 so that the upper surface 111b is aligned with the upper surface of the finishing material 130. [ have.

In other words, a horizontally extending fixing plate 112 is integrally formed on both outer peripheral surfaces of the substantially central portion of the body 111 so as to be easily fixed to the step 230, The fixing holes 113 are formed so as to be spaced apart from each other so that the position is restricted by the fixture 120 such as an anchor. Accordingly, it is preferable that the fixing plate 112 is integrally formed with the body 111.

When the finishing material 130 is used for bridging, the after-concrete is used. When the finishing material 130 is used for an underground roadway, an elastic joint material can be used. In the widened cutouts 210 and 310, So that it is formed in such a manner as to be poured.

2B, the elastic restoration type expansion joint 110 is received in the widening parts 210 and 310 formed at the upper part of the gap, while the lower part 111b is fitted in the gap 220 between the concrete structures separated from each other, The fixing plate 112 is fixed to the upper surface of the step 230 which is formed naturally by the formation of the gap 220 with the widening cutouts 210 and 310 and the fixing operation of the fixing plate 112 is completed .

2b, it is preferable that the upper surface of the elastic recovery type expansion joint material 110 of the present invention is arranged to coincide with the upper surface of the road wrapping material 300, preferably the upper surface thereof is covered by the finishing material 130 .

The vehicle load P due to vehicle travel is dispersed along the upper surface 111b of the elastic restoring type expansion joint 110 so as to be distributed to the side lower side of the elastic restoration type expansion joint 110. As a result, And it is also possible to prevent the cracks which cause breakage of the elastic restoring elastic member 110 by the hollow portion S. [

Since the fixing plate 120 is fixed to the step 230 by the fixture 120, the leakage of the penetration of the elastic material or the finishing material 130, which is the concrete after the leakage, As well as to prevent it.

[Construction of elastic restoring type expansion joint apparatus 100 of the present invention]

FIGS. 3A and 3B illustrate a construction sectional view of the elastic restoring type expansion joint 100 of the present invention.

3A, when the width of the wedge-cut portions 210 and 310 of the concrete structure 200 and the road wrapping material 300 is increased in a bridge having a large expansion / contraction of the concrete structure 200 separated by the formation of the gaps 220, An elastic restoring type expansion joint device 100 installed in the expansion joint device is shown.

First, the concrete structure 200 corresponds to a slab in a bridge, and the road pavement 300 is an asphalt or concrete pavement.

It can be seen that the gap 220 and the step 230 are artificially formed in the concrete structure 200 and that the widened cut portions 210 and 310 are continuously formed on the gap 220, .

The fixing plate 112 is fixed by the fixture 120 while the lower portion 111b of the elastic recovery type expansion joint material 110 is sandwiched and set between the gaps 220 so that the elastic restoration type expansion / Are fixedly installed by using the gap 220 and the widened cutouts 210 and 310.

The elastic restoring type elastic expansion joint 110 is formed in an elliptical cross section having a hollow portion S formed at a central portion thereof in consideration of the width of the gap 220. In the widened cut portion 310, It is understood that the finishing material 130 is poured and closed.

At this time, it can be understood that the upper surface of the finishing material 130 and the upper surface 111b of the elastic recovery type elastic joint material 110 are set to coincide with each other, so that the vehicle load or the like can be directly transmitted or dispersed through the finishing material.

3B, the width of the wedge cut portions 210 and 310 of the concrete structure 200 and the road wrapping material 300 in the underground roadway where the amount of expansion and contraction of the concrete structure 200 spaced apart from each other by the formation of the gaps 220 is not large, And an elastic restoring type expansion joint device 100 to be installed when it is not large is shown.

First, the concrete structure 200 corresponds to a slab in an underground roadway, and the road wrapping material 300 is also an asphalt or concrete pavement.

As a result, it can be seen that the gap 220 and the step 230 are artificially formed in the concrete structure 200, and the wider cut portions 210 and 310 are continuously formed on the gap 220 Knowing is the same.

The fixing plate 112 is fixed by the fastener 120 while the lower portion 111b of the elastic recovery type expansion joint material 110 is fitted between the gaps 220 so as to be set, 110 are fixedly installed by using the gap 220 and the wider cut portions 210, 310.

The elastic restoring type expansion joint 110 has a circular cross section formed at the center of the hollow portion S in consideration of the width of the gap 220. The elastic joints 110, The finishing material 130 is put in place and closed.

At this time, the upper surface of the finishing material 130 and the upper surface 111b of the elastic recovery type elastic joint material 110 are set to coincide with each other, so that the vehicle load or the like can be directly transmitted or dispersed through the finishing material.

[Construction Method of Elastic Restoration Type Expansion Joint 100 of the Present Invention]

FIGS. 4A, 4B and 4C show construction steps of the elastic restoring type expansion joint of the present invention. FIG.

First, as shown in FIG. 4A, widening cut portions 310 and 210 are first formed on a road pavement 300, which is an asphalt or concrete packing material, and a concrete structure 200, which is a slab, on a bridge or an underground roadway. In the slab concrete structure 200, A gap 220 having a width smaller than that of the step 310 is formed by using a cutter or the like not shown to naturally form the step 230.

The widened cut portion 210 of the concrete structure 200 continuous with the widened cut portion 310 and the gap 220 are naturally formed in the road wrapping material 300 in the process of forming the step 230, Lt; / RTI &

The edges of both upper surfaces of the gap 220 are chamfered so that the lower portion of the elastic recovery type expansion joint material 110 is fitted so as not to be damaged.

Further, since the fixture 120 such as an anchor is fixed to the step 230 of the concrete structure, the fixing performance can be sufficiently secured as compared with the fixture 120 installed in the road pavement.

Next, as shown in FIG. 4B, the lower portion 111b of the elastically restoring elastic joint material 110, which is previously provided, is set between the gaps 220 and is fixed to the fixture (not shown) through the fixing hole 113 of the fixing plate 112 120 to fix the elastic restoration type expansion joint material 110 on the upper surface of the step 230. [

A plurality of fixtures 120 are formed in the extending direction of the elastic recovery type expansion joint material 110 and may be provided in accordance with the extension length of the concrete structure and the end faces of the elastic recovery type expansion / So that they can be connected using an adhesive or the like.

Next, as shown in FIG. 4C, a finishing material 130 including an elastic or retrofitted concrete is placed and cured in the widened cut part 310 so that the upper surface of the finishing material 130 and the upper surface of the elastic recovery type expansion / And the upper surface of the elastic recovery type expansion joint material 110 is closed so that the construction can be completed easily.

Further, at the time of maintenance, the finishing material 130 is removed, and the elastic recovery type expansion joint material 110 is separated from the stepped surface, then replaced, and then the finishing material 130 is installed again.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: Elastic restoring type expansion joint
110: Elastic restoring type expansion joint
111:
111a: lower portion of the trunk portion 111b: upper surface of the trunk portion
112: fixing plate 113: anchor hole
120: Fixture 130: Finishing material
200: road packaging material
210: wider cut section 220: clearance
230:
300; Concrete structure 310: Widened cut portion
S: hollow portion of elastic restoring type expansion joint

Claims (6)

A concrete structure (200) having a gap (220) and a widened cut portion (210) above the gap to form the step portion (230)
The upper portion of the concrete structure is accommodated in the road wrapping material 300 on the upper surface of the concrete structure and is accommodated in the widened cut portions 210 and 310 formed continuously with the widened cut portion 210, (110) fixed by an elastic restoring type fixing member (130); And
And a finishing material 130 formed to be embedded in the widened cutouts 210 and 310 so that the elastic recovery type expansion joint material 110 is embedded,
The elastic restoring type elastic expansion joint (110) includes an elliptic or circular body portion (111) and a fixing plate (112) extending on both sides of the body portion and fixed to the upper surface of the step 230. The method according to claim 1,
Wherein the concrete structure (200) is a slab of a bridge or an underground driveway, and the road pavement (300) is an asphalt or concrete pavement. The method according to claim 1,
The elastic restoring type expansion joint material 110 is made of a rubber material and has a hollow portion S formed inside the body portion 111. The fixing portion 112 is fixed to the fixing portion 120 along the step portion 230 Elastic expansion type telescoping joint. (a) forming a gap (220) and a widened cut portion (210) above the gap in the concrete structure (200) so that the step portion (230) is formed;
(b) a body portion is accommodated in a widened cut-away portion 310 formed continuously with the road pavement on the upper surface of the concrete structure so as to fit the lower portion of the body portion into the gap 220, Providing a resilient restoring type elastic joint material (110) having a fixing plate (112) fixed on both sides thereof; And
(c) forming a finish material (130) so that an elastic recovery type expansion joint material is embedded in the wider cut parts (210, 310), wherein the elastic recovery type expansion joint material has an elliptical or circular body part And a fixing plate which is extended and fixed to the step portion. 5. The method of claim 4,
The fixture of the step (b)
Wherein the fixture (130) including an anchor fixed to the upper surface of the step portion (230) is inserted through the fixing hole (113) formed in the fixing plate (112). 5. The method of claim 4,
Wherein the finish material is formed so that the upper surface of the finish material (130) of step (c) and the upper surface of the elastic recovery type expansion joint material are aligned with each other.

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