JP3594551B2 - Reinforcement structure of concrete structure - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a reinforcing structure for a concrete structure such as a bank, a retaining wall, a retaining wall, a foundation, and the like.
[0002]
[Prior Art and Problems to be Solved by the Invention]
In recent years, in concrete structures such as dams, cracks have occurred inside and on the surface due to alkali-aggregate reaction, aging, land subsidence, changes in earth pressure, earthquakes, etc. A phenomenon occurs in which the function cannot be effectively exhibited.
For a concrete structure in which such a crack has occurred, filling the crack with a resin, concrete, or the like is performed as an emergency measure. However, simply filling the crack with resin, concrete, or the like only closes the current crack and does not lead to the recovery of the original function. Further, since the growth of the crack cannot be suppressed, the concrete structure may collapse eventually. Therefore, there is no permanent countermeasure other than to tear down and rebuild the cracked concrete structure. However, in this case, there is a problem that the construction is difficult and the construction cost is high.
The present invention has been made in view of the above problems, and a concrete structure capable of easily and inexpensively reinforcing a concrete structure having a reduced strength and capable of maintaining the reinforcing effect permanently. An object of the present invention is to provide a reinforcement structure.
[0003]
[Means for Solving the Problems]
The reinforcing structure for a concrete structure according to the present invention for achieving the above object is a reinforcing structure for a concrete structure constructed in a state in which a front surface, a top surface, and a back surface are exposed to the outside, and a front surface of the concrete structure , The upper surface and at least the upper portion of the back are formed by connecting a front portion extending vertically along the front surface, an upper portion extending longitudinally along the upper surface, and a back portion extending vertically along the rear surface . the frame body surrounds Mukoto, the cross section of the concrete structure is characterized in that it is integrated (claim 1).
According to the reinforcing structure for a concrete structure having such a configuration, the concrete structure having reduced strength can be reinforced by the frame, and the integrity of the concrete structure can be permanently secured.
[0004]
In the reinforcing structure for the concrete structure, it is preferable that the frame is fixed to the concrete structure by a fixing member (claim 2). In this case, the integrity of the concrete structure is more effectively improved. Can be increased.
[0005]
In the reinforcing structure of the concrete structure (claim 2), the fixing member is constituted by an anchor bolt , and each end of the anchor bolt is attached to the front part and the back part of the frame body while penetrating the concrete structure. Each may be fixed (claim 3).
In this case, the anchor bolt can ensure good integration between the frame and the concrete structure.
[0006]
In the reinforcing structure of the concrete structure, it is preferable that a protective plate for preventing a concrete piece from falling is interposed between the front surface of the concrete structure and the frame (claim 4).
In this case, the concrete piece peeled off from the concrete structure can be prevented from falling by the protective plate.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a sectional view showing a reinforcing structure of a concrete structure according to the present invention, and FIG. 2 is a front view. In this embodiment, a case is shown in which a bank A, which is a plain concrete structure, is reinforced.
The dike A has a crack generated on the surface or inside due to alkali-aggregate reaction, aging, etc., and its front surface A1, upper surface A2, and back surface A3 are surrounded by a plurality of frames 1.
[0008]
The frame 1 is prepared in advance or at a construction site by welding or connecting bolts such as a channel steel such as a channel steel or a square pipe. The front portion 11 of the frame 1 extends vertically in a state of being inclined along the front face A1 of the bank A, and the upper portion 12 thereof extends horizontally along the upper surface of the bank A. The back portion 13 of the frame body 1 extends vertically along the back surface A3 of the dam A, and a predetermined lower portion thereof is driven into the soil B behind the dam A.
[0009]
Each frame 1 is arranged at predetermined intervals (for example, every 30 cm) along the lateral direction of the bank A, and the upper part 12 of each frame 1 is made of a cross beam 2 made of a shaped steel bridged over the upper part 12. Are connected by welding or bolting.
Each frame 1 is fixed to the bank A by an anchor bolt 3 as a fixing member. The anchor bolts 3 penetrate the front part 11 of the frame 1, the dam A, and the back part 13 of the frame 1, respectively. In this penetrating state, the frame 1 is sandwiched together with the dam A, and the frame 1 is A is integrated. That is, the end portion 31 of the anchor bolt 3 on the side facing the soil B is fixed to the back portion 13 of the frame body 1 by the check claw 33 built in the end portion 31 so as to be able to protrude and retract. The frame 1 is sandwiched together with the dam A by screwing and tightening the nut 34 to the end 32 on the front portion 11 side, and the frame 1 is integrated with the dam A (see FIG. 3). The non-return claw 33 is rotatably fixed to the anchor bolt 3, and the front portion 11 of the frame 1, the dam A, and the frame are aligned with the axis thereof along the axis of the anchor bolt 3. 1 through the hole C formed in the back portion 13, and in this penetrated state, the shaft is rotated by a spring or the like so that the axis is orthogonal to the axis of the anchor bolt 3, thereby being locked to the back portion 13 of the frame 1. .
[0010]
In addition, it is preferable that the lower end of the front part 11 of the frame 1 is fixed to the soil below the dam A or the cement anchor buried in the soil by the anchor bolt 3. It is preferable that the soil B on the back side of the bank A is subjected to a grouting treatment because the strength of the soil B itself can be secured.
[0011]
With the above configuration, the bank A can be used to permanently reinforce the bank A. In addition, since the integrity of the dam A can be favorably secured by the frame 1, even if a part of the dam A collapses due to an extremely large crack in the dam A, the overall weight of the dam A decreases. Can be prevented. For this reason, it can prevent that the function of the bank A falls by weight reduction.
Further, since the anchor bolts 3 are fixed to the back portion 13 of the frame 1 while penetrating the dam A, the integrity of the frame 1 and the dam A can be extremely excellently secured. Can be reinforced more effectively.
[0012]
FIG. 4 is a cross-sectional view showing another embodiment. This embodiment differs from the embodiment shown in FIG. 1 in that a protective plate 4 is interposed between the front face A1 of the bank A and the front part 11 of the frame 1. The protection plate 4 extends along the entire front surface A1 of the bank A so as to close the gap between the front portions 11 of the frame bodies 1. As the protection plate 4, a steel plate, a grating plate, or the like can be used.
In this embodiment, the protective plate 4 can prevent the fine concrete pieces peeled off from the bank A from falling. For this reason, it is possible to more effectively prevent the weight of the embankment A from decreasing, and it is possible to ensure good safety.
[0013]
FIG. 5 is a sectional view showing still another embodiment. In this embodiment, the back portion 13 of the frame 1 extends along only the upper portion of the back surface A3 of the bank A. In addition, the front face A1 side of the dam A is subjected to a grove treatment to reinforce the dam A, and the tip of the anchor bolt 3 having the front part 11 of the frame 1 penetrated into the part A4 subjected to the grout treatment. Is fixed. However, the anchor bolt 3 may be fixed to a cement anchor buried in the soil B on the back surface of the dam A while the dam A is penetrated.
[0014]
The reinforcing structure for a concrete structure according to the present invention is not limited to the above-described embodiment. For example, a wire may be used instead of the anchor bolt 3 as a fixing member, the fixing member may be omitted, and the cross beam 2 may be used. Can be applied to the front part 11 of each frame 1 and various other design changes can be made. Further, the reinforcing structure of the concrete structure of the present invention can be applied to a reinforcing structure of various concrete structures other than the bank A, such as a retaining wall, a retaining wall, and a foundation.
[0015]
【The invention's effect】
As described above, according to the reinforcing structure for a concrete structure according to the first aspect , since the cross section of the concrete structure having reduced strength is reinforced and integrated by the frame, it is easy and inexpensive. The function of the concrete structure can be maintained permanently.
According to the reinforcing structure for a concrete structure according to claim 2, the frame is fixed to the concrete structure by a fixing member, and the integrity of the concrete structure can be more effectively increased. The concrete structure can be reinforced more strongly.
[0016]
According to the reinforcing structure for a concrete structure according to claim 3, the anchor bolt as a fixing member is fixed to a portion of the frame body along the back surface of the concrete structure while penetrating the concrete structure. As a result, the integrity of the frame body and the concrete structure can be ensured extremely well, and the concrete structure can be reinforced even more strongly.
According to the reinforcing structure for a concrete structure according to the fourth aspect, since the concrete piece separated from the concrete structure can be prevented from falling by the protective plate, the weight of the concrete structure is prevented from decreasing. can do. Therefore, it is possible to more effectively prevent the functional structure of the concrete structure from deteriorating, and it is possible to secure good safety.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a reinforcing structure for a concrete structure according to an embodiment of the present invention.
FIG. 2 is a front view of a main part of FIG.
FIG. 3 is a cross-sectional view of a main part showing an anchor bolt mounting structure.
FIG. 4 is a cross-sectional view showing another embodiment.
FIG. 5 is a cross-sectional view showing still another embodiment.
[Explanation of symbols]
1 Frame 3 Anchor bolt (fixing member)
4 Protective plate A dam (concrete structure)
A1 Front A2 Top A3 Back

Claims (4)

A reinforcing structure for a concrete structure constructed with the front, top and back exposed to the outside,
A front surface of the concrete structure, connecting the top surface and at least the top rear, front extending vertically along the front, the back extending vertically along the top and the back extending longitudinally along said top surface to one another reinforcing structure to the enclosed Mukoto a steel frame body constructed in concrete structures, characterized in that the cross section of the concrete structure is integrated. The reinforcing structure for a concrete structure according to claim 1, wherein the frame is fixed to the concrete structure by a fixing member. The reinforcement of a concrete structure according to claim 2, wherein the fixing member is an anchor bolt, and each end of the anchor bolt is fixed to a front portion and a back portion of the frame body while penetrating the concrete structure. Construction. The reinforcing structure for a concrete structure according to claim 1, wherein a protective plate for preventing a concrete piece from falling is interposed between the front surface of the concrete structure and the frame.

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