JP3118736B2 - Repair method for bridge joints - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for repairing a joint on a bridge surface of a road bridge, an elevated road, an elevated parking lot, and the like. More specifically, the present invention relates to a method for repairing a joint on a bridge surface, characterized in that an elastic pavement is formed on a repaired portion of these joints with an elastic resin based on geotextile.

[0002]

2. Description of the Related Art Road bridges, elevated roads, elevated parking lots, and the like include:
In order to allow the vehicle to travel on the bridge surface without any hindrance against the temperature change of the structure, creep and drying shrinkage of the concrete, rotational displacement of the girder end due to load, etc.
A joint is provided. However, this joint, while being affected by the natural environment such as temperature change, is gradually damaged by running of the vehicle, or a step is generated around the joint, preventing smooth running of the vehicle, It causes vibration and noise. In addition, it may cause damage to the bridge body. In particular, in snowy and cold regions, this is more pronounced with spiked tires and tire chains.

[0003] Therefore, in order to ensure smooth running of the vehicle and to reduce the influence on the life of the bridge body, a method of repairing a damaged portion of a joint portion has conventionally been used as a countermeasure. How to make a no-join. For example, usually 25-30
A method of reducing the number of joints provided by reducing the number of joints provided at m intervals to increase the interval between joints, that is, connecting (continuing) PC beams or the like. How to make a simple no joint. For example, a method of installing a rubber joint (rubber plate) during expansion and contraction, or a method of continuously overlaying asphalt pavement on an existing pavement surface and a joint portion. And so on.

[0004]

However, the method of repairing a damaged portion of the joint portion is a large-scale and time-consuming method, and also requires a considerable cost.
In addition, the non-joint method requires large-scale construction, has problems such as prolonged traffic stoppage and construction noise, and has a problem that the cost is enormous. further,
The method of installing the rubber joint during the expansion and contraction of the vehicle has a problem that the vehicle may be damaged relatively early due to running of the vehicle or the like. Furthermore, the method of overlaying asphalt pavement continuously on existing pavement and joints is
On the asphalt pavement in the joint portion and its surroundings, stress is concentrated due to expansion and contraction of the joint portion, difference in base material, step, discontinuity and the like, so that the joint was damaged quickly and was not practically sufficient.

[0005] Therefore, there is a demand for an economical and durable repair method for a bridge joint that eliminates vibration and noise caused by vehicle running of the bridge joint, does not affect the bridge body, and is economical. .

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to meet such a demand, and a vehicle traveling by forming an elastic pavement with a geotextile-based elastic resin in a repair portion of a joint portion. It is intended to provide a method of repairing a bridge joint that is economical and durable, while eliminating the occurrence of vibration, noise, and the like caused by the above, without affecting the bridge body.

The present invention also relates to a method for repairing a joint of a bridge surface, wherein the repaired portion of the joint is coated with an elastic resin to form an elastic pavement. It requires a construction method.

According to the method of repairing a joint of a bridge surface according to the present invention,
It is possible to form an elastic pavement by laminating geotextiles at room temperature in accordance with the current condition even if the joints are damaged in various ways, or to form an elastic pavement by providing a crushed stone layer, etc. Therefore, the construction is easy, and the generation of vibration, noise, and the like due to the running of the vehicle can be eliminated, and there is no influence on the bridge body, and economical and durability can be improved.

The floor slab referred to in the present invention refers to a floor slab such as a road bridge, an elevated road, an elevated parking lot and the like. Concrete slabs, PC slabs (precast concrete slabs),
Although there are types such as steel slabs, the present invention targets concrete slabs and PC slabs.

The backup material used in the present invention is a synthetic resin foam, for example, a foam such as polyethylene or polyurethane, and may be any of rectangular, round and hollow round shapes.

The sheet material used in the present invention is a sheet made of metal, synthetic resin, plastic, rubber, fiber or the like.

The elastic resin used in the present invention is, for example, an acrylic resin. Acrylic resin is a polymer resin mainly composed of acrylic acid and methacrylic acid derivatives.
Usually, they are classified into an acrylic rubber type and an acrylic resin type. In the present invention, an acrylic resin type is mainly used.

As the acrylic resin of the acrylic resin type,
Higher acrylates having a low glass transition temperature, such as butyl acrylate and 2-ethylhexyl acrylate, are also used, but the amount used is small. In addition to lower acrylates such as methyl acrylate, ethyl acrylate, and methyl methacrylate, vinyl acetate is also used. Hard monomers having a high glass transition temperature such as styrene, acrylonitrile and the like are used. Therefore, a plasticizer such as a phthalic acid ester or a fatty acid ester is generally used in combination with the acrylic resin-based acrylic resin.

The acrylic resin used as the elastic resin is
Use it after processing it appropriately. An example is shown in Table 1.

[0015]

[Table 1]

In the above-mentioned composition, the lime powder is mainly limestone powder, and according to the description of "Asphalt Pavement Outline" issued by the Japan Road Association, 100% by weight of a 600 μm sieve and 90 to 100% by weight of a 150 μm sieve. % And a 75 μm sieve.

In the above composition, the curing agent is a reaction initiator such as benzoyl peroxide and potassium persulfate.

Acrylic resins have the advantage of being excellent in weather resistance.

The geotextile used in the present invention is a nonwoven fabric, a textile or a woven fabric made of synthetic fibers such as polyester, polyamide, polypropylene and vinylon, glass fibers, carbon fibers and the like.

The single crushed stone (20-13) used in the present invention
mm or 13 to 5 mm) means that 100% by weight of a 26.5 mm sieve passes through 85 to 100% by weight of a 19 mm sieve and 85% of a 13.2 mm sieve passes according to the description of the “Asphalt Pavement Outline”. % Crushed stone, that is, No. 5 crushed stone, or 19% sieve 100 weight, 13.2mm sieve 85-100% by weight
A crushed stone that passes and stops at 85% by weight or more in a 4.75 mm sieve, that is, a crushed stone No. 6. Crushed stone is the same as that used for the surface and base layers of asphalt pavement, and is clean, strong and durable, and has long or flat stone pieces, garbage,
Use materials that do not contain harmful substances such as mud and organic matter. In addition, in the present invention, if necessary Luxubaide,
Artificially fired aggregates, aluminum powder, ceramic particles, emery, silica sand, etc. can also be used.

In the method of repairing a joint of a bridge surface according to the present invention, a method of forming an elastic pavement by laminating geotextiles or the like when the thickness of the repaired portion is 40 mm or less is as follows.
In the case where the thickness of the repaired portion is 40 mm or more, a method of forming an elastic pavement by providing a crushed stone layer is advantageous, but of course there is no need to stick to this.

Next, an outline of a method for repairing a bridge joint according to the present invention will be described with reference to the drawings.

FIG. 1 is a longitudinal sectional view before repairing an existing bridge joint, and FIGS. 2, 3 and 4 are longitudinal sectional views showing one embodiment in which repair is performed by the repair method of the present invention. . In the figure, (1) is a concrete floor slab, and (2) is an existing joint member, usually having a width of about 30 to 70 mm.
(3) is a play portion at the opposite end of the floor slab. (7) is a base layer of the existing asphalt pavement, and (8) is a surface layer thereon.

In the repair method for forming the repair section shown in FIG. 2, first, a part of the play portion (3) is sealed with a backup material (4) at a portion where the existing joint member (2) is removed. Thereafter, the sheet-like material (5) is laid thereon, and then the geotextile and the elastic resin are laminated with the geotextile to form the elastic pavement (6). Alternatively, the elastic pavement (6) is formed of an elastic resin by providing a crushed stone layer or the like.

The repair method for forming the repair cross section shown in FIG. 3 is to perform overlay paving (9) with a heated asphalt mixture including a joint portion on the existing bridge surface pavement, and then perform the existing joint portion of the joint portion. By using a heated asphalt mixture at the boxed portion where the overlay layer on the member (2) and its surroundings is cut and removed, or on the existing bridge surface pavement without including the existing joint member (2) of the joint part and its surroundings An overlay pavement (9) is formed, and then an unpaved portion is laminated with geotextile using geotextile and elastic resin to form an elastic pavement (6). Alternatively, the elastic pavement (6) is formed of an elastic resin by providing a crushed stone layer or the like.

The repair method for forming the pavement cross section shown in FIG. 4 is based on the joint part of the existing bridge surface pavement, or the joint part and its surrounding asphalt pavement base layer (7) and surface layer (8).
A part of the play part (3) is sealed with a backup material (4) at a part where the part of the space is removed by tearing up to the upper surface of the concrete floor slab (1), and then a sheet-like material (5) is placed thereon. After laying the geotextile and the elastic resin, the geotextile is laminated to form an elastic pavement (6) according to the upper surface of the base layer (7) of the existing bridge pavement, or a crushed stone layer is provided. An elastic pavement (6) is formed with the elastic resin on the upper surface of the base layer (7) of the existing bridge surface pavement, and the upper surface of the surface layer (6) is heated on the upper surface of the existing bridge surface pavement with a heated asphalt mixture. 10) Paving.

FIG. 5 is a longitudinal sectional view of a main part showing a state in which the geotextile is laminated with the geotextile and the elastic resin to form the elastic pavement (6). In the figure,
(11) is a geotextile, and (12) is an elastic resin. First, a required amount of an elastic resin (12) is applied to a base, and a first-layer geotextile (11) is stuck to impregnate the geotextile (11) with the elastic resin (12).
Subsequently, a required amount of the elastic resin (12) is applied to the upper surface thereof, and a second layer of the geotextile (11) is applied to impregnate the elastic resin (12). Are laminated, and when a predetermined thickness is reached, a predetermined amount of an elastic resin (12) is finally applied to form an elastic pavement (6).

FIG. 6 is a longitudinal sectional view of a main part showing a state in which a crushed stone layer is provided and an elastic pavement (6) is formed of an elastic resin. In the figure, (13) indicates single crushed stone (20 to 13).
mm or 13-5 mm). First, a required amount of an elastic resin (12) is applied to a base, and a required amount of a single crushed stone (20 to 13 mm or 13 to 5 mm) is applied on the upper surface thereof (13).
Is laid to form a crushed stone layer, a required amount of the elastic resin (12) is poured from the upper surface of the crushed stone layer, and the gap of the crushed stone layer is filled with the elastic resin (12) while pressing the upper surface of the crushed stone layer with an iron. At the same time, the surface of the crushed stone layer is covered, then the upper surface is covered with a geotextile (11) to impregnate the elastic resin (12), and the upper surface thereof is coated with a required amount of the elastic resin (12) to form an elastic pavement. Form (6).

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the pavement method for a bridge joint according to the present invention will be described below.

[0030]

[Materials used] Backup material: Polyethylene resin foam (commercially available) Sheet-like material; Iron plate (commercially available) Geotextile; Petromat (polypropylene nonwoven fabric, U.S.A., trade name, Ellipse) Elastic resin; Acrylic resin (Cole-cut MF ( Nichihari Chemical Industry Co., Ltd., trade name)) Note) Acrylic resin and plasticizer are mixed in advance, and stone powder and hardener are added and mixed before construction using a handle mixer at the repair site. Single crushed stone; No. 6 crushed stone (commercially available)

[0031]

Embodiment 1 The repair method is of the type shown in FIG.
The repaired part had a width of about 50 cm and a thickness of about 3 cm, and the width of one side of the pavement was 6 m. First, the existing joint members (rubber joints) of the bridge joints to be repaired are removed, a part of the gap at the opposite end of the concrete slab is sealed with a backup material, and then an iron plate is laid on it and the gap is removed. Was coated. Next, an elastic resin prepared in advance is applied at a rate of 3 l / m ² on the iron plate and the base surface from which the rubber joint has been removed, and the first layer of Petromat which is cut according to the original shape of the repaired portion is applied thereon. And the Petromat was impregnated and sealed with an elastic resin. Then, an elastic resin was applied thereon at a rate of 3 l / m ² , and a second layer of Petromat was attached thereon to impregnate and seal the Petromat with the elastic resin.
The same operation was repeated successively to laminate Petromat. Finally, an elastic resin was also applied at a rate of 3 l / m ² to cover the petromat, and an elastic pavement having a thickness of about 3 cm was formed at the repaired portion of the joint. Petromat used nonwoven fabric of polypropylene. Since the nonwoven fabric of polypropylene is also used as an oil-absorbing mat, the impregnation of the petromat with the elastic resin was good.

The curing time of the elastic resin was 20 to 30 minutes, and after about 30 minutes from the end of the operation, the elastic resin was used for transportation.

[0033]

EXAMPLE 2 Asphalt pavement was applied to a site of a PC bridge having a width of 6.5 m and a length of about 25 m. Asphalt pavement was also applied before and after the bridge, but the bridge was worn and damaged.
Therefore, as a part of pavement repair, it was decided to overlay with the heated asphalt mixture including the bridge surface, but the existing joint part was covered with overlay, and the overlay layer around the upper part of the existing joint part was damaged as it was I will. However, if the existing joint itself is to be repaired, problems arise in terms of economy, traffic rules, and the like. Therefore, the joint was repaired according to the repair method shown in FIG. First, the entire repair area including the existing bridge pavement was overlaid with the heated asphalt mixture. The pavement thickness is 4 cm. Next, the existing joint portion and the overlay layer on the periphery thereof were cut off with a cutter to remove the box portion having a width of about 70 cm in the transverse direction. An elastic resin is applied at a rate of 3 l / m ² to the base of the boxed portion, then crushed stone No. 6 is laid on the entire boxed portion, and the thickness of the crushed stone layer is made substantially flush with the overlay layer with a gold iron. The thickness of the crushed stone layer was tentatively adjusted, and an elastic resin was poured from above, and while holding the iron down, the voids of the crushed stone layer were filled with the elastic resin and simultaneously the surface of the crushed stone layer was covered. Since the crushed stone layer tends to become thinner as the elastic resin is filled, the crushed stone is replenished each time so that the surface of the crushed stone layer covered with the elastic resin is almost flush with the overlay layer. Immediately thereon, a previously prepared Petromat is stuck to impregnate and seal the elastic resin.
It was applied at a rate of m ² coated with Petro mat to form a resilient pavement in the box vent portion of the overlay layer. The curing time of the elastic resin was 20 to 30 minutes. Therefore, the opening of traffic was performed about 30 minutes after the end of the work.

One year has passed since the construction was carried out in both Example-1 and Example-2, but the results are in good condition.

[0035]

As described above, according to the present invention, the following effects can be obtained.

(1) The method of repairing a joint of a bridge according to the present invention is as follows.
Even if the damage situation at the site is different, it can easily cope with the shape change at the site, so the installation is easy, and since it can be installed at room temperature, there is no need for temperature control and it is possible to provide a stable quality. .

(2) The cured product obtained by the repair method of the present invention
The time required for traffic regulation is short because the elastic pavement cures quickly and is excellent.

(3) In the repair method of the present invention, an elastic pavement is formed in a portion where stress such as vibration and impact is most likely to be concentrated under traffic, and the elastic pavement is elastic and stretchable. Because of its excellent repetitive bendability, it can absorb and alleviate stress, withstands vibration and impact under traffic, and does not affect the bridge body. Further, the elastic pavement is excellent in durability because it has excellent fluid resistance and wear resistance.

(4) According to the repair method of the present invention, an economical and simple no-joint is formed on the pavement of the bridge by using an elastic pavement, so that the vehicle can travel smoothly when traveling, and vibration, noise, etc. due to shock can be obtained. Can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing a state before repairing an existing bridge joint part.

FIG. 2 is a longitudinal sectional side view showing one embodiment in a state where repair is performed by the repair method of the present invention.

FIG. 3 is a vertical sectional side view showing another embodiment in a state of being repaired by the repair method of the present invention.

FIG. 4 is a longitudinal sectional side view showing still another embodiment in a state repaired by the repair method of the present invention.

FIG. 5 is an individual cutaway view of a main part showing a state where an elastic pavement is formed by laminating geotextiles.

FIG. 6 is a longitudinal sectional side view of a main part showing a state in which a crushed stone layer is provided to form an elastic pavement.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Floor slab 2 Existing joint member 3 Expansion / contraction part 4 Backup material 5 Sheet material 6 Elastic pavement 7 Base layer of existing asphalt pavement 8 Surface layer of existing asphalt pavement 9 Overlay pavement body 10 Newly laid surface layer 11 Geotextile 12 Elastic resin 13 Single Crushed stone

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-194305 (JP, A) JP-A-2-50405 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E01C 11/02 E01D 19/06

Claims (3)

(57) [Claims] 1. A method of repairing a joint of a bridge surface, in which an elastic resin is applied to a repaired portion of the joint, an upper surface thereof is impregnated with the elastic resin by applying a geotextile, and then an elastic resin is applied to the upper surface thereof. A method for repairing a joint on a bridge surface, which is applied to form an elastic pavement. 2. A method of repairing a joint of a bridge surface, wherein an elastic resin is applied to a repaired portion of the joint, and a first layer of geotextile is applied to an upper surface thereof to impregnate the elastic resin. Applying an elastic resin on the upper surface, applying a second layer of geotextile, impregnating the elastic resin, repeating the same operation in order, laminating the geotextile, and finally applying the elastic resin to form an elastic pavement. A characteristic repair method for bridge joints. 3. A method of repairing a joint of a bridge surface, wherein an elastic resin is applied to a repaired portion of the joint, a single crushed stone is laid on an upper surface thereof to form a crushed stone layer, and the crushed stone layer is ironed. While pressing, the void is filled with the elastic resin and the surface of the crushed stone layer is covered, then the upper surface is impregnated with the elastic resin by applying a geotextile, and further, the upper surface is coated with the elastic resin to form the elastic pavement. A bridge joint repair method characterized by being formed.