JPH0312808Y2 - - Google Patents

Description

[Detailed description of the invention] <Technical field> This invention relates to a protector for concrete piers, and more specifically, it protects the surfaces of concrete piers of elevated roads, elevated tracks, etc. constructed during rapids, along the coast, etc. Regarding protectors.

<Background> Elevated roads, elevated tracks, etc. are constructed along coastlines where rapid rivers and rough waves crash, and rocks, driftwood, etc. collide with the piers of these structures.
Since it is severely eroded or damaged, it becomes a major cause of shortening the lifespan of the structure as a whole. Therefore, it is known that it is necessary to protect the pier surface from erosion and damage by some method.

<Prior art> From the above point of view, conventionally, as an extremely primitive method, a fairly thick wooden protector was attached to the surface of the bridge pier using bolts, etc.; They rotted relatively quickly due to impregnation with seawater, etc., and were damaged relatively quickly due to collisions with rocks, driftwood, etc., and were unable to provide sufficient protection for the piers. Therefore, in recent years, as rubber adhesion technology has developed, protectors with rubber lining on the surface of steel plates have been developed and are being put into practical use. However, protectors are constantly immersed in river water or seawater and are exposed to ultraviolet rays. In addition, as mentioned above, the work is subject to impact from rocks, driftwood, etc., so the work must be carried out in a well-controlled lining process at the factory, and the steel plates to be rubber-lined must be brought in and the rubber-lined It takes time and effort to transport the applied steel plates, and it takes time and effort to bond rubber to the steel plates, leading to a rise in costs.

In addition, in order to suppress the increase in costs caused by the above method, as shown in Japanese Patent Application Laid-Open No. 54-98020,
Attempts are being made to use the same steel templates used to construct concrete piers. However, this case is similar to the above case in that careful attention is required to adhere the template material to the rubber, and the problem of rising costs has not been much improved.

Furthermore, in any of the above cases where a rubber lining is applied to the surface of the template material, there is a risk that a portion of the rubber lining may be damaged or the internal template material may be corroded by seawater etc. for some other reason.
From the perspective of improving the safety of elevated roads and elevated tracks, it has not yet been shown to be sufficiently effective.

Therefore, there is a strong demand from the government agencies in charge of construction to further reduce the cost and improve the corrosion resistance of protectors without degrading their quality.

<Purpose> This invention was made in view of the above problems, and provides a fit-in protector for concrete piers that has excellent buffering performance and corrosion resistance, is easy to manufacture and install, and is inexpensive. The purpose is to

<Structure> In order to achieve the above object, the structure of the fitted protector for concrete piers of this invention is a shallow box-shaped protector with an inner diameter approximately corresponding to the outer shape of the steel template for constructing concrete piers. and a rubber protector body formed with a reinforcing layer on its inner surface, and a rust-proof cushion material layer interposed between the steel template material and the rubber protector body. It is characterized by

<Examples> Hereinafter, examples will be described in detail with reference to the accompanying drawings showing examples.

FIG. 1 is a rear perspective view showing a state in which a concrete pier fitting-type protector is attached to a steel template. The protector 1 is held integrally with the steel mold plate 4 by attaching an angle member 41 to the side wall 11 which is formed to protrude backwards by bolting or the like (not shown).

2 is a longitudinal sectional view of FIG. 1, and FIG. 3 is a partially enlarged longitudinal sectional view of FIG.
The rubber protector body 2 is constructed by integrally forming a reinforcing layer 22 made of canvas on the inner surface side (steel template material 4 side), and a protective layer is provided between the rubber protector body 2 and the steel template material 4. A rust-proof cushion material layer 3 made of a rubber sponge containing a rust material is interposed.

Fig. 4 is a perspective view showing the assembled state of the steel template material 4 fitted with the protector 1 in accordance with the outer diameter dimension of the concrete pier, and Fig. 5 is an enlarged cross-sectional view of the assembled state. It is.

As is clear from this figure, the horizontally adjacent steel templates 4 are assembled by passing the bolts 5 through the side walls 11 that abut each other and the angle members 41 that abut the inner surface of each side wall 11. This is done by attaching the side wall 11 and the angle member 41 together with a nut 51. Therefore, between the horizontally adjacent steel templates 4, the side walls 11 of the protector 1 are in contact with each other under pressure, and reliable waterproof performance can be achieved.

Also, the vertically adjacent steel templates 4 may be assembled by integrally tightening the side walls 11 and angle members 41 using bolts and nuts in the same manner as described above. The steel mold plates 4 can be assembled to a predetermined height corresponding to the depth.

Therefore, after that, by pouring concrete into the cavity 6 formed by the steel template material 4 assembled as described above and solidifying it,
Concrete piers can be completed.

Since the concrete pier completed in the above manner has the steel template 4 and the protector 1 on its outer circumferential surface, it is possible to
The rubber layer 21 and rust-proof cushion material layer 3 provide effective buffering performance against impact from driftwood, etc., and the reinforcement layer provides protection against immersion in river water, seawater, and ultraviolet irradiation. Rubber layer 2 by 22
This effectively prevents weakening, damage, etc. of the steel template 1, and even if water enters for some reason, the rust-proof cushion material layer 3 can effectively prevent corrosion of the steel template material 4. The strength of the manufactured bridge piers can be reliably maintained over a long period of time.

FIG. 6 is a longitudinal sectional view of a main part showing another embodiment, and the only difference from the above embodiment is that a fitting rib 12 is integrally formed on the inner surface of the rear end of the side wall 11. Therefore, in this case, the angle material 41
The mounting work and positioning work can be further facilitated by fitting the ribs 12 into the ribs 12 and positioning them, or by fitting the peripheral side walls of the steel template material 4 into the ribs 12.

FIG. 7 is a vertical cross-sectional view of a main part showing yet another embodiment, which differs from the above embodiment in that sealing edges 13 and 14 are alternately formed on the outer surface of each of the upper and lower edges of the protector 1. Only. Therefore, in this case, the sealing edge 13 contacts the lower surface of the lower side wall 11 of the upper protector 1, and the upper surface of the side wall 11 contacts the sealing edge 14 formed on the lower side 11 of the upper protector 1. Since the waterproof effect is achieved by contacting the upper and lower steel mold plates 4, the number of bolts required to connect the upper and lower steel templates 4 can be reduced.

Note that this invention is not limited to the above-mentioned embodiments; for example, the reinforcing layer may be composed of short and small fibers, and the rust-preventing cushion material layer may be composed of a plastic foam containing a rust-preventing material. In addition, various design changes can be made without changing the gist of this invention.

<Effects> As described above, this invention has made it possible to easily fit the protector to the steel template material 4 for constructing concrete piers, so the factory only needs to manufacture the protector, and there is no need to go to the template material factory. It eliminates the need to transport the finished product from the factory, and also eliminates the need to pay close attention to adhesion between the template material and rubber, which is the case with conventional rubber linings, which saves time and reduces costs. A reinforcing layer is formed on the inner surface of the rubber protector body to improve strength, and a rust-proof cushioning material layer is interposed between the rubber protector body and the template material to improve cushioning performance and rust prevention. As a result, it has excellent corrosion resistance and impact resistance, and has the unique practical effect of being able to effectively protect concrete bridge piers from rapid currents, seawater, etc. over a long period of time.

[Brief explanation of drawings]

Figure 1 is a rear perspective view of a fit-in type protector for concrete piers, Figure 2 is a vertical sectional view of the same as above, Figure 3 is a partially enlarged vertical sectional view of the same as above, and Figure 4 is an assembled protector for forming a pier. Figure 5 is a perspective view of the state, and Figure 5 is a cross-sectional view showing the connection between protectors.
FIG. 7 and FIG. 7 are enlarged longitudinal cross-sectional views of main parts showing another embodiment. DESCRIPTION OF SYMBOLS 1... Protector, 2... Rubber protector main body, 3... Rust-proof cushion material layer, 4... Steel template material, 12... Rib for fitting, 13, 14... Seal ridge, 22 ...Reinforcement layer.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A rubber protector formed in the shape of a shallow box having an inner diameter approximately corresponding to the outer diameter of a steel template for constructing concrete bridge piers, and having a reinforcing layer formed on its inner surface. A fit-in type protector for a concrete pier, comprising a main body and a rust-proof cushion material layer interposed between the steel template material and the rubber protector main body. 2. The insert-type protector for a concrete pier according to claim 1 of the above-mentioned utility model registration, wherein the reinforcing layer is composed of a woven fabric or short fibers. 3. The fit-in protector for a concrete pier according to claim 1, wherein the rust-proof cushioning material layer is made of plastic foam or rubber sponge containing a rust-proofing material. 4. The fitting type protector for a concrete bridge pier according to claims 1 to 3 of the above-mentioned utility model registration claim, wherein the rubber protector body has fitting ribs along the four peripheral corners. 5. Claims 1 to 4 of the above Utility Model Registration Claims in which the rubber protector main body has sealing protrusions alternately on the outer surface of the upper and lower edges, respectively.
Fit-in type protector for concrete piers as described in Section 1.