JPH0437928Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to a protective material for bridge piers.

[Conventional technology]

Concrete piers are constantly washed by river currents and seawater, and during typhoons and floods, they are hit by waves and large and small rocks with great force, resulting in constant wear and tear.

Therefore, the technique disclosed in Japanese Patent Publication No. 57-58484 was proposed. As shown in Fig. 2, this technique involves forming an angle 2 at the end of a segment 1 that forms a metal concrete form, and using this angle 2 to interconnect the segments with connectors such as bolts and nuts. Concatenate.

Each segment 1 has a structure in which the outer surface of a steel plate 3 is coated with a protective material 4 having wear resistance, impact resistance, corrosion resistance, etc.

The protector formed by combining the segments configured in this way is installed at the location where the pier is to be constructed, and concrete is placed in the regulated space with appropriate reinforcing bars. When the concrete hardens, it becomes an integral structure with the protector, and the protector can be used as is. It can be used as a bridge pier without removing it.

[Problem that the invention attempts to solve]

However, according to the above-mentioned conventional technology, since the protective material 4 is attached only to the outer surface of the steel plate 3,
Since the steel plate 3 comes into contact with outside air, water, concrete, etc. on the inside, there is a problem in terms of corrosion resistance. Furthermore, since the flange 5 protrudes horizontally from the inside, air bubbles accumulate at the bottom of the flange 5 when concrete is poured, causing corrosion at that point and impairing the durability of the steel plate. There's a problem.

[Means for solving the problem] The present invention is to attach a cap nut with an opening facing outward and a cap nut with an opening facing inward to a predetermined position of an iron plate whose front and back sides are covered with rubber. A through hole is provided in the rubber of the cap nut to form the main body of the pier protection material, and an angle member is attached with a bolt to the cap nut with the opening of the pier protection material body facing outward. A connecting plate having an embedded anchor with an air escape hole is attached to the bag nut facing inward by bolts, and a formwork is formed by connecting adjacent pier protection material bodies,
It is characterized by pouring concrete into the formwork to form a single piece.

[Effect]

Each pier protection material body is connected to each other, and a connecting plate with holes drilled at the locations that fit each bag nut is applied to the connection points of each pier protection material body through a rubber plate inside, and screws are attached to each bag nut. By screwing into the nuts, the main bodies of the pier protection material are connected to each other, and furthermore, angle members are attached to the main body of the pier protection material in a square shape with bolts for reinforcement, and can be used as formwork when pouring concrete. After concrete is poured, it becomes an integral part of the concrete and becomes a durable protection material for bridge piers. The angle members can also be removed after concrete is poured.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a partial side sectional view showing an embodiment of the present invention, and in the figure, 6 is an iron plate, and 7 is this iron plate 6.
It is a rubber having impact resistance and corrosion resistance that is vulcanized and bonded so as to cover both sides and the surrounding area of the pier, and constitutes the pier protection material main body 8 so that the iron plate 6 does not come into contact with outside air or water at all.

Reference numeral 9 denotes a cap nut provided near the connecting end of the pier protection material body 8 so as to open inward, and the cap nut 9 is passed through the opening side into a through hole drilled in the iron plate 6 and fixed. It is buried wrapped in rubber material 7. The attachment points are provided at predetermined intervals around the pier protection material main body 8.

10 is also a cap nut embedded in the rubber material 7, and this cap nut 10 is attached to the above-mentioned cap nut 9 on the iron plate 6.
It is fixed in the opposite direction, with the screw opening facing outward. The attachment points are provided at predetermined intervals near the connecting ends and, if necessary, near the center.

Reference numeral 11 denotes a connecting plate, in which mounting holes 12 are bored at locations corresponding to the locations of the respective cap nuts 9 when the ends of the adjacent pier protection material main bodies 8 are abutted against each other. Furthermore, this connection plate 11 has an embedded anchor 13 protruding from it, and an air escape hole 1.
3a is open.

Reference numeral 14 denotes an angle material that matches the size of the pier protection material main body 8, and is attached in a desired square shape to the middle and end of the outer peripheral surface for reinforcing the pier protection material main body 8. Body 8 bag nut 10
There is a mounting hole 15 at the corresponding location, and a locking hole 16 is provided in the angle material 14 installed near the end of the pier protection material main body 8, and a locking hole 16 is provided in the corresponding angle material 14 of the continuous pier protection material main body 8. The locking holes 16 are made so that they can be connected to each other with bolts and nuts.

Next, the assembly of the pier protection material main body 8 will be explained.

To assemble the pier protection material main body 8 at the pier installation site, first touch the ends of each pier protection material 8 to each other, and insert the connecting plate 11 inside between both pier protection material main bodies 8. Align the mounting hole 12 with the opening of the cap nut 9. At that time, a rubber plate 1 is placed between the pier protection material body 8 and the connection plate 11.
Sandwich 7. Then, by screwing the bolts 18 into each of the cap nuts 9, adjacent pier protection main bodies 8 are integrated.

In addition, by abutting each pier protection material main body 8, the angle members 14 attached around the periphery with bolts 19 also face each other, and the bolts 20 are inserted into the locking holes 16.
By connecting them with nuts 21 through the ribs, they serve as reinforcing ribs to maintain the shape of the formwork when used as a formwork for pouring concrete. When installing this angle material, it is recommended to insert a rubber plate between the flange and the main body of the pier protection material.
If it is manufactured from stainless steel, there is no need to sandwich the rubber plate as shown in the figure.

Concrete is poured into the space formed by the pier protection material body 8 assembled in this way, and the pier protection material body 8 is used as a concrete formwork and is then used with embedded anchors 13. The pier protection material main body 8 is integrated with the concrete to form a protective covering for the outer surface of the pier.

After concrete is poured, angle material 1
4 is removed, and a bolt whose head is covered with rubber is inserted into the mounting hole 15.

Note that the pier protection material does not need to span the entire height of the pier, and may be raised above the water level to a height that prevents running water, seawater, and waves from hitting the pier.

Furthermore, the pier protection material may be attached to the outer surface of the pier after the pier is formed, and can also be used for the purpose of repairing damaged piers.

[Effect of idea]

According to the present invention having the above-described structure and operation, since the area around the pier is protected by the pier protection material, the pier will not be damaged by debris or falling objects, and the pier will not be damaged. The protective material itself is durable because the entire surface of the iron plate is covered with rubber, so the iron plate never comes into contact with air or water, and by making the rubber thicker on the outside than on the inside, it is protected against debris and debris. The impact effect on objects can be increased, making the protection of concrete piers even more effective.

In addition, since the connection plate that connects each pier protection material body is attached to the pier protection material body via a rubber plate, the airtightness and watertightness of the pier protection material body are maintained, and the durability is maintained. Serves as a protective material for bridge piers.

Furthermore, the embedded anchor provided in the connection plate allows the main body of the pier protection material to become integrated with the poured concrete, which has the effect of forming a strong integral structure with the pier.

In addition, by making air escape holes in the embedded anchors of the connection plate, air bubbles that form at the bottom of the embedded anchors can escape when concrete is poured, which has the effect of preventing the steel plate from rotting. .

In addition, by providing angle material flanges that serve as reinforcing ribs on the outer peripheral surface of the main body of the pier protection material,
Sufficient strength can be obtained as a formwork during concrete pouring, allowing for reliable molding, and since the angle material can be attached and detached with screws, it has the effect of being able to be removed after completion.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing an embodiment of the present invention, FIG. 2 is a sectional view of a conventional example, and FIG. 3 is a side sectional view of the present invention in an assembled state. 6... Iron plate, 7... Rubber, 8... Pier protection material body, 9, 10... Cap nut, 11... Connection plate, 13... Embedded anchor, 14... Angle material.

Claims (1)

[Scope of utility model registration request] A cap nut with the opening facing outward and a cap nut with the opening facing inward are attached to a predetermined position on a steel plate whose front and back sides are covered with rubber, and through holes are provided in the rubber of each cap nut. An angle member is attached with a bolt to the cap nut that forms the main body of the pier protection material, and the opening of the main body of the pier protection material faces outward, and an air escape hole is attached to the cap nut whose opening faces inward. Connecting plates with drilled embedded anchors are attached with bolts to connect adjacent pier protection material bodies to form a formwork, and concrete is poured into this formwork to integrate it. Characteristic protection material for bridge piers.