JP2884449B2 - Concrete reinforcement and anticorrosion cover for steel structures - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete reinforcement / corrosion protection cover for a steel structure used to reinforce and protect a steel structure at the edge of the water, such as a steel sheet pile or a steel pipe pile structure, with concrete or mortar. Things.

[0002]

2. Description of the Related Art Conventionally, when a steel structure such as a steel sheet pile or a steel pipe pile at the shore of a wharf or a pier in a harbor or the like is reinforced and subjected to anticorrosion work, for example, a steel reinforced material on the land side L in FIG. A formwork 2 such as a metal foam is attached to a sea side S surface of a steel sheet pile 1 together with a reinforcing material A such as an H-shaped steel and a reinforcing material B such as a pipe by a separator 3, and the steel sheet pile 1 and the formwork 2 are joined together. In between, fresh concrete 4 was poured, and after hardening, the form 2 was removed, and the concrete was used for reinforcement and anticorrosion.

The separator 3 supports the lateral pressure of the ready-mixed concrete 4 applied to the wall surface of the form 2, and includes a plurality of separators 3, one end of which is supported by a reinforcing member B.
Is welded to a steel sheet pile, which is a reinforced and anticorrosive material, by welding W, and each of the reinforcing members A and B is for supporting the side pressure applied to the formwork 2. As described above, in the case of the formwork 2 used for reinforcement and anticorrosion on the underwater and splash stagnation walls such as the steel sheet pile 1, the weight of the ready-mixed concrete 4 is reduced to the formwork as a container for solidifying the ready-mixed concrete 4 with a target mold. It will be pushed as the side pressure P.

[0004] However, the weight of the ready-mixed concrete is applied to the form as the side pressure P in proportion to the filling height of the ready-mixed concrete 4 at the vertical height of the formwork 2. The side pressure P is further applied to the mold 2 in proportion to the increase in the surface area between the fixing portions of the mold 2, and a large side pressure P is applied to the mold 2. Therefore, metal foam alone as a container for filling ready-mixed concrete 4
Since it is impossible to support the side pressure P at all, the side pressure P applied to the metal foam is calculated, and further, a reinforcing material and a reinforcing structure capable of sufficiently responding to the available pressure P are designed and studied. Also, at the work site, under a working environment near the water surface where working conditions are poor, a metal foam of a heavy steel formwork as a container is assembled, and the metal foam is protected from side pressure P on the contact side of the metal foam. Difficult works such as assembling heavy reinforcement were being carried out.

In addition, the actual state of the sheet pile structure is not a straight line as seen in the design drawing, but is out of order, and when it is large, there are bends in and out of an angle exceeding 25 degrees. Therefore, in the case of a formwork and a resin cover that captures the sheet pile wall surface as a wall surface, a method of assembling the projecting portions of the actual sheet pile wall surface by connecting the projecting portions into and out of the actual sheet pile wall surface is used, and the filled ready-mixed concrete 4 is filled with an uneven thickness in the horizontal direction. In addition, the strength of the reinforcement as the indirect concrete lining is not uniform, and the amount of the ready-mixed concrete 4 increases, which is uneconomical, and the thin-walled portion of the ready-mixed concrete 4 in this corrosive environment. However, in the near future, there was also a problem of poor quality such as accelerated deterioration due to carbonation of concrete.

On the other hand, a resin corrosion protection cover is attached to the surface of a steel reinforced / corrosion-proof material for reinforcement and corrosion protection, between which a fresh concrete or mortar is filled, and the steel structure is subjected to harbor or marine corrosion. BACKGROUND ART Corrosion-resistant covers made of resin, which are intended to protect against harmful environments, have already been used because of their advantages that they can be made lighter than conventional metal molds and can be used as they are after filling concrete.

However, even in this case, the weight of the concrete at the time of filling the ready-mixed concrete is directly applied to the anticorrosion cover made of resin as the side pressure in the same manner as in the case of a mold such as a metal foam. In addition, the conventional mounting structure of the resin anti-corrosion cover is a flange and its mounting bolt structure, or a tightening structure with a stainless steel band and its mounting bolts. Maintenance work, such as detachment or replacement at regular inspections to prevent this, is very troublesome.

[0008] On the other hand, conventional molds and anticorrosion covers made of resin are:
After attaching the brackets to the reinforced and anticorrosive material and placing the bottom plate on it, the formwork and anticorrosion cover were assembled vertically on the bottom plate, so not only does it take time to install the bottom plate, For example, there is a difficulty in construction such as securing a work space for a diver by digging a water bottom of 1 m or more by dredging and attaching the above bracket.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and uses a resin anticorrosion cover having arc-shaped side surfaces and a bottom portion to reduce the weight of the cover. While reducing the cost of reinforcement and reinforcement,
It is an object of the present invention to provide a concrete-reinforcing anticorrosion cover for a steel structure capable of quantifying and reducing the amount of ready-mixed concrete and mortar to be injected into the interior.

[0010]

As a means for solving the above-mentioned problems, a concrete-reinforced corrosion-protective cover for a steel structure according to the present invention is provided with corrugated joints such as threads on the left and right outer surfaces. Each having a V-shaped flat cross-section and having steel mounting feet to the reinforced and anticorrosive material, for example, FR
Separate plate made of resin such as P, and having a corrugated joint at the side end that meshes with the corrugated joint at the side end, and a resin and a side surface and bottom of which are formed in a continuous arc shape, such as FRP It is configured by appropriately combining with an anticorrosion cover and attaching to the outer surface of the reinforced / anticorrosive material.

In other words, the use of a resin anti-corrosion cover reduces the weight of the cover, and adopts arc-shaped side surfaces and a bottom to change the side pressure acting at right angles to the cover by concrete injection of the anti-corrosion cover into a tensile force. The tensile force is transmitted to the separator plate at the corrugated joint, and further transmitted to the reinforced and anticorrosive material from the mounting foot of the separator plate, so that the anticorrosion cover can be made thinner and the reinforcing ribs can be saved, and even if the conventional mold Work on the bottom of the frame can be reduced.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a plan sectional view of a main part of a concrete reinforced anticorrosion cover for a steel structure in one embodiment, and FIG. FIG. 4 is a perspective view partially broken away. This cover is made of a steel structure in which a steel sheet pile 1 shown in FIG. It is attached to the surface of the sea side S.

First, the separator plate 5 has a V-shaped flat cross-section having corrugated joints 7 on its left and right outer surfaces, such as a thread shown in this embodiment.
Has a mounting foot 8 that is attached to the surface of the reinforced and anticorrosive material, that is, the steel sheet pile 1 by welding. Further, the anticorrosion cover 6 has, at its side end, a corrugated joint 7 that meshes with the corrugated joint 7, and its side and bottom are formed in a continuous arc shape.

When the sea side S surface of the steel structure made of the steel sheet pile 3 is reinforced with concrete by the combination of the above-mentioned separation plate 5 and anticorrosion cover 6, as shown in FIG.
The mounting feet 8 of the separator plate 5 are attached to the steel sheet pile 1 by welding W, and the corrugated joints 7 of the anticorrosion cover 6 respectively corresponding to the corrugated joints 7 of the separator plate 5 are attached.

At this time, a plurality of studs 9 are erected on the steel sheet pile 1 as shown in FIG. The corrugated joint 7 between the separation plate 5 and the anticorrosion cover 6 has a bolt 13 formed through a bolt hole provided on the separation plate 5 side with respect to a nut 12 provided on the anticorrosion cover 6 side.
Is screwed and fixed, but an adhesive or a sealant may be applied to the joint surface of each corrugated joint 7.

Next, the ready-mixed concrete 4 is filled between the separator plate 5 and the anticorrosion cover and the outer surface of the reinforced and anticorrosion material made of the steel sheet pile 1 by injection and hardened. When the curing is completed, the bolt 13 is pulled out, and the bolt hole is
Fill it with a resin putty or the like and close it. In addition,
In this case, the upper end of the separation plate 5 is applied to the top end or the top starting point of the steel sheet pile 1 to be reinforced and anticorrosive, and is lowered vertically downward therefrom. Is attached by welding W, each vertical separation plate 5
Can be mounted accurately.

On the inner surface of the anticorrosion cover 6 where the ready-mixed concrete 4 is filled, a number of projections 15 are provided as shown in FIG. 4 so that the projections 15 bite into the ready-mixed concrete 4 or mortar, and after hardening, FRP or the like. The resinous anticorrosion cover 6 and concrete and mortar are completely integrated inside, so that the anticorrosion cover does not peel off or separate even by the impact received on the outer surface, and its function can be maintained for many years together with the anticorrosion effect of the resin. . Next, by forming the anticorrosion cover 6 into an arc shape, the side pressure applied in the direction perpendicular to the poured ready-mixed concrete 4 is changed into a tensile force on an arc wire, thereby making the resin anticorrosion cover 6 thinner and reinforcing. The removal of the ribs makes it possible to reduce the weight of the cover and reduce the manufacturing cost.

That is, the side pressure acting at right angles to the anticorrosion cover 6 is converted into a tensile force on an arc in the same manner as in the tank shape, and the tensile force acting on the arc is transmitted to the separator plate 5 at the waveform joint 7, and It is transmitted from the mounting foot 8 to the steel sheet pile 1 of the reinforced and anticorrosive material. In addition, since the arc-shaped anticorrosion cover 6 is extended not only on the vertical side surface but also on the bottom in a continuous arc shape and integrated, it is necessary to mount the bottom portion in the conventional method. Material can be reduced.

Next, FIG. 5 shows the cover of the present invention, for example, as 2
This is another embodiment of the present invention applied to the case where the reinforced and anticorrosive object which has been changed by 5 ° C. is attached to the sea side S surface. The structure of the corrugated joint 7 changes the thread engagement so that it can be easily installed, and the ready-mixed concrete 4
Can be made substantially equal in thickness.

Further, as shown in FIG. 6, even when a steel structure in which the steel pipe piles 20 are arranged is used as a reinforced / corrosive material, an arc-shaped anticorrosion cover 6 corresponding to the outer diameter of the steel pipe piles 20 is provided. Can respond.

[0021]

As described above, according to the concrete-reinforced anticorrosion cover for a steel structure of the present invention, the weight of the cover can be reduced and the production cost can be reduced. This has the effect of quantifying the amount of mortar and preventing a mistake in the planning of the amount to be poured.

Further, by appropriately combining a V-shaped cross-sectionally shaped separator plate and an appropriate arc-shaped anticorrosion cover, and attaching it to the outer surface of the reinforced / anticorrosion material, a wide range of shapes and arrangements of steel sheet piles and steel pipe piles can be obtained. This can be easily and effectively applied to concrete reinforcement of steel structures. Further, the present invention has an advantage that the work and the material for mounting the bottom required for the conventional method can be reduced, and the efficiency of the mounting work can be remarkably improved.

The separator plate and the anti-corrosion cover of the present invention are made of a resin such as FRP, so that not only the weight can be reduced, but also a three-dimensional reproduction or an image can be attached or painted on the outer surface of the resin. By sticking a film of marble, etc. on a film and coating it with a transparent resin, the appearance of the actual product can be enhanced on the seawall, etc. It can be applied effectively.

[0024]

[Brief description of the drawings]

FIG. 1 is a plan cross-sectional view of a main part of a concrete reinforced anticorrosion cover for a steel structure according to the present invention.

FIG. 2 is a partially cutaway perspective view of FIG.

3 is a plan sectional view showing a state in which the sea side of the steel structure made of the steel sheet pile 1 is reinforced with concrete and protected against corrosion by the cover of FIG. 1;

FIG. 4 is a perspective view showing a state in which a large number of protrusions are arranged on the inner surface of the anticorrosion cover of FIG. 2;

FIG. 5 is a plan sectional view showing another embodiment in which a steel structure made of a steel sheet pile is reinforced with concrete and protected from corrosion by the cover of FIG. 1;

6 is a plan cross-sectional view of another different embodiment in which the sea side of a steel structure made of a steel pipe pile is reinforced with concrete and protected from corrosion by the cover of FIG. 1;

FIG. 7 is an explanatory plan view in which concrete reinforcement and corrosion prevention are performed by a conventional mold.

[Explanation of symbols]

 Reference Signs List 1 steel sheet pile 4 ready-mixed concrete 5 separator plate 6 anticorrosion cover 7 corrugated joint 8 mounting foot 20 steel pipe pile

Claims (2)

(57) [Claims] 1. A separator plate having a V-shaped flat cross section having corrugated joints on left and right side surfaces, respectively, and having a foot for attachment to a reinforced / anticorrosive object, and a corrugated joint engaged with the corrugated joint. Concrete reinforcement / corrosion protection cover for steel structures attached to the outer surface of the reinforced / corrosion-proof material by appropriately combining with a corrosion protection cover having side surfaces formed in an arc shape 2. A concrete reinforcement for a steel structure according to claim 1, wherein the side and bottom of the anticorrosion cover are formed in an arc shape.
Anticorrosion cover.