A method for repairing a structure, and the structure.

Abstract

To provide a structure repair method suitable for a structure reinforced by using a filling member, and a structure using this repair method.SOLUTION: A structure repair method is a repair method for a structure that is provided with a first support column and a second support column arranged at an interval from the first support column, and provided with a first layer filled with a filling member in a space sandwiched by the first support column and the second support column. The structure repair method comprises a second layer forming process for forming a second layer having a predetermined thickness on the first layer. In the second layer forming process, the upper surface of the second layer is formed at a position higher than the height of the surface around the second layer. The structure repair method may also be a structure production method.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a method for repairing a structure, and to a structure. [Background technology]

[0002] Conventionally, a technique is known in which a filler member made of a material such as foamed resin is filled into a structure supporting a road to reinforce the structure (see, for example, Patent Document 1). In the structure of Patent Document 1, a frame erected on the slope of a mountain is filled with rigid urethane foam, a roadbed supporting the road is constructed on the rigid urethane foam, and asphalt is laid on the roadbed. This type of structure is generally known as a lightweight embankment structure. In recent years, it has been known to use such lightweight embankment structures to reinforce deteriorated bridges. In a lightweight embankment structure used to reinforce a bridge, the gap between adjacent pillars (piers or abutments) and the area surrounded by the deck are filled with a filler member, and the lower part of the deck is changed to a lightweight embankment structure. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4885039 Summary of the Invention [Problem to be solved by the invention]

[0004] In structures reinforced with lightweight embankment structures as described above, the roadbed or deck may be damaged by cracks or other damage after reinforcement. When the roadbed or deck is damaged, local pressure is applied to the embankment, which may cause the filling material to collapse. For this reason, it is preferable to repair such damaged roadbed or deck as soon as possible.

[0005] An object of the present disclosure is to provide a method for repairing a structure that is suitable for a structure reinforced with a filling member, and a structure using this repair method. [Means for solving the problem]

[0006] The method for repairing a structure according to the present disclosure is a method for repairing a structure having a first support and a second support arranged at a distance from the first support, and a first layer in which a filling member is filled in a space between the first support and the second support. The method for repairing a structure includes a second layer forming step of forming a second layer of a predetermined thickness on the first layer. The second layer forming step forms an upper surface of the second layer at a position higher than the height of the surrounding surfaces of the second layer. Here, the method for repairing a structure may be read as a method for manufacturing a structure.

[0007] According to this method for repairing a structure, by forming a second layer on the first layer filled with the filling material, the structure can be repaired without removing or processing the first layer filled with the filling material. This shortens the construction period required for repair. Therefore, this method for repairing a structure is suitable for a structure reinforced with a filling material.

[0008] The structure according to the present disclosure includes a first support, a second support arranged at a distance from the first support, a first layer in which a filling member is filled in the space between the first support and the second support, and a second layer formed to a predetermined thickness on the first layer. The structure is formed such that the upper surface of the second layer is located higher than the height of the surrounding surfaces of the second layer.

[0009] This structure is suitable for repairing a structure reinforced with a filling member. Effect of the Invention

[0010] According to the present disclosure, it is possible to provide a method for repairing a structure that is suitable for a structure reinforced with a filling member, and a structure using this repair method. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a front cross-sectional view of a structure according to an embodiment of the present disclosure. [Diagram 2] An enlarged view of the area indicated by the dashed line in Figure 1. [Diagram 3] FIG. 1 is a front cross-sectional view showing a repair procedure for a structure according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings.

[0013] (1) Overall structure As shown in Fig. 1, the structure 1 includes a first support column 2, a second support column 4, a first layer 6, a second layer 8, and a slope 10. The second support column 4 is disposed at an interval from the first support column 2. The structure 1 in this embodiment is a bridge used for a road for automobiles. Specifically, the first support column 2 and the second support column 4 are, for example, bridge piers made of reinforced concrete, and the first support column 2 and the second support column 4 support a deck D formed of concrete or the like.

[0014] The first layer 6 is formed by filling the space between the first support 2 and the second support 4 with a filling material. In this embodiment, the filling material is a foam formed by rigid urethane foam. Such rigid urethane foam has a feature that the construction period is short because the raw material is discharged, foamed, and hardened in a relatively short time. However, the filling material may be other materials for lightweight embankment such as mortar and polystyrene foam. The first layer 6 is formed to change and reinforce the lower part of the deck D of the structure 1 into a lightweight embankment structure by filling the space surrounded by the deck D, the first support 2, and the second support 4 with a filling material.

[0015] The circle shown by the two-dot chain line in FIG. 1 is a simulation of a tire T of a large vehicle passing over the road surface. When changing to an embankment structure by forming such a first layer 6, it is necessary that no cracks or the like occur in the deck D. That is, in a lightweight embankment structure used as a road, it is necessary to prevent local pressure loads from being applied to the lightweight embankment portion. However, if damage such as cracks occurs in the deck D, the tire T passes near the damaged portion, and the deck D may bite into the first layer 6, which is the lightweight embankment portion, and local pressure loads may be applied. For this reason, it is necessary to repair the deck D by some method. However, there has been a problem that a repair method for such a structure has not been established until now. Therefore, in this disclosure, the second layer 8 is provided as follows.

[0016] As shown in Fig. 2, the second layer 8 is formed on the first layer 6 with a predetermined thickness N. The second layer 8 has a function of dispersing the load from the tire T. The second layer 8 is a layer of embankment formed by laying soil containing, for example, sand, gravel, and the like.

[0017] The predetermined thickness N is a value that changes depending on the allowable compressive stress of the first layer 6. When the filling member forming the first layer 6 is a member containing rigid urethane foam, the predetermined thickness N is preferably 700 mm or more. Specifically, when the first layer 6 has an allowable compressive stress equivalent to that of rigid urethane foam, the predetermined thickness N may be 700 mm or more. In this embodiment, the asphalt layer 12 is formed on the upper surface of the second layer 8. Therefore, the predetermined thickness N includes the thickness of the asphalt layer. However, since the thickness of the asphalt layer 12 is thin, the thickness of the asphalt layer 12 may or may not be included in the predetermined thickness N.

[0018] On the other hand, the deck D is made of a material having higher rigidity than the second layer 8, such as concrete. As a result, when the deck D is in a sound state without any damage, the pressure load from the tire T is received by the entire surface of the deck. For this reason, as shown in FIG. 1, the thickness of the deck D is thinner than the predetermined thickness N of the second layer 8. Therefore, in a state in which the second layer 8 is formed, the height of the upper surface 8c of the second layer 8 is higher than the surrounding surface R. In this embodiment, the surrounding surface R is a road surface that exists before the second layer 8 is formed on the bridge. In addition, in this embodiment, in order to smoothly connect the second layer 8 and the surrounding surface R, a slope 10 is provided that slopes from the upper surface 8c of the end 8a and the end 8b of the second layer 8 (the upper surface of the asphalt layer 12 in this embodiment) toward the surrounding surface R.

[0019] In addition, the second layer 8 is formed such that the end 8a of the second layer 8 on the first support 2 side is spaced apart from the end 6a of the first layer 6 on the first support 2 side by a predetermined thickness N or more in the arrangement direction in which the first support 2 and the second support 4 are arranged. More specifically, as shown in FIG. 2, the distance X from the end 6a of the first layer 6 on the first support 2 side to the end 8a of the second layer 8 on the first support 2 side may be the predetermined thickness N or more. As shown in FIG. 1, the end 8b of the second layer 8 on the second support 4 side is also formed to be spaced apart from the end 6b of the first layer 6 on the second support 4 side by a predetermined thickness N or more. That is, the length of the second layer 8 is longer than that of the first layer 6 in the arrangement direction in which the first support 2 and the second support 4 are arranged.

[0020] The pressure load from the tire T is dispersed in the second layer 8 at an angle α with respect to the extending direction of the upper surface 8c. The angle α is, for example, 45 degrees. When the angle α is 45 degrees, the predetermined thickness N and the distance X are in a relationship of the hypotenuse of a right-angled isosceles triangle. Therefore, by making the distance X equal to or greater than the predetermined thickness N as described above, the pressure load applied to the end 6a of the first layer 6 on the first support 2 side and the end 6b on the second support 4 side is dispersed by the second layer 8. This makes it possible to prevent the first layer 6 from being subjected to a localized load.

[0021] (2) Repair (manufacturing) procedure for Structure 1 Next, the repair procedure (manufacturing procedure) of the structure 1 will be described with reference to FIG. 3, taking as an example a bridge with a damaged deck D.

[0022] As shown in Fig. 3(a), the structure 1 is in a state where the deck D of a bridge is damaged. As shown in Fig. 3(b), a second layer 8 of a predetermined thickness N is formed on the deck D of such a structure using soil. At this time, the deck D may be left and buried in the second layer 8. Since the second layer 8 is formed containing sand, gravel, etc., it fills in cracks and other gaps in the deck D, and the soil is laid out so that there are no gaps.

[0023] As shown in Fig. 3(c), after the second layer 8 is formed, the slope 10 is formed. In this embodiment, the slope 10 is formed by an asphalt layer 12 formed on the upper part of the second layer 8. However, the slope 10 may be formed by a member separate from the asphalt layer 12.

[0024] (3) Variations Although the embodiment of the present disclosure has been described above, the present disclosure is not limited to the above embodiment, and various modifications are possible without departing from the gist of the invention. In particular, the multiple modifications described in this specification can be arbitrarily combined as necessary.

[0025] For example, in the above embodiment, an example has been described in which the deck D is buried in the second layer 8, but the present disclosure is not limited to this. Specifically, after removing the deck D, the second layer 8 may be formed by filling the space above the first layer 6 with sand or gravel to a predetermined thickness N. In other words, the deck D may be removed, and the entire second layer 8 may be made into an embankment structure.

[0026] In this case, the angle at which the pressure load received from the tire T is dispersed is smaller than when the deck D is buried. Specifically, the angle α is approximately 30 degrees, which is smaller than the 45 degrees when the deck D is buried while remaining. For this reason, when the entire second layer 8 is an embankment structure, it is preferable to set the predetermined thickness N, which is the distance between the tire T and the first layer 6, to a larger value than when the deck D is buried while remaining.

[0027] In the above embodiment, the repair procedure has been described in which the first layer 6 is formed, and then the second layer 8 is formed on the upper part of the first layer 6, but the present disclosure is not limited to this. For example, the first layer 6 and the second layer 8 may be formed simultaneously. Specifically, a unit in which the second layer 8 is formed on the first layer 6 may be fitted between the first support 2 and the second support 4.

[0028] Also, for example, in the above embodiment, a bridge having the first support column 2 and the second support column 4 has been described as an example, but the present disclosure is not limited thereto. The structure 1 may be a structure 1 other than a bridge as long as it employs a similar structure. For example, in addition to a bridge used for a road, it may be a structure using a lightweight embankment structure for the foundation of a building.

[0029] In addition, in the above embodiment, sand and gravel are used as examples of materials used for the second layer 8, but the present disclosure is not limited thereto. The second layer 8 may be any material that is an embankment material that disperses the pressure load from the tires T. In other words, the material of the second layer 8 may be any material that can increase the distance between the first layer 6 and the tires T of vehicles passing through the road, disperse the pressure load of the tires T, prevent the first layer 6 from breaking, and repair the structure 1 without damaging the first layer 6.

[0030] (4) Effects According to this embodiment, the structure 1 using the filling member can be easily repaired by the procedure of forming the second layer 8 of a predetermined thickness N on the first layer 6, and the procedure of forming the slope 10. Therefore, the construction period for repairing such a structure 1 can be shortened. Furthermore, when such a structure 1 is used for a road, the period during which the road is closed to traffic can be shortened.

[0031] Furthermore, with the repair method of this embodiment, the second layer 8 can be formed by transporting the soil to be used for the second layer 8 and piling it on top of the first layer 6. Therefore, there is no need to use large heavy machinery such as a crane. As a result, the process of bringing in such heavy machinery can be omitted, shortening the construction period and reducing the construction costs. Furthermore, with this repair method, repairs can be made even in places where it is difficult for heavy machinery to enter.

[0032] As described above, the present disclosure can provide a method for repairing a structure suitable for a structure 1 reinforced with a filling member, and a structure 1 using this repair method. [Explanation of symbols]

[0033] 1: Structure, 2: 1st pillar, 4: 2nd pillar, 6: 1st layer 6a: end, 6b: end, 8: second layer, 8a: end, 8b: end 8c: Top surface, 10: Slope, 12: Asphalt layer D: Deck, N: Thickness, R: Surface, T: Tire X: distance, α: angle

Claims

1. A method for repairing a structure having a first support and a second support arranged at a distance from the first support, the method comprising the steps of: a second layer forming step of forming a second layer having a predetermined thickness on the first layer; The second layer forming step includes forming an upper surface of the second layer at a position higher than the height of a surrounding surface of the second layer. How to repair a structure.

2. In an arrangement direction in which the first support and the second support are arranged, an end portion of the second layer on the side of the first support is formed to be spaced apart from an end portion of the first layer on the side of the first support by at least the predetermined thickness. A method for repairing a structure according to claim 1.

3. When the filling member forming the first layer is a member containing urethane foam, the predetermined thickness is 700 mm or more. A method for repairing a structure according to claim 1 or 2.

4. a slope forming step of forming a slope from an end of the second layer toward a peripheral surface of the second layer, A method for repairing a structure according to any one of claims 1 to 3.

5. The first pillar; a second support pillar disposed at a distance from the first support pillar; a first layer in which a filling member is filled in a space between the first support and the second support; a second layer formed on the first layer to a predetermined thickness; Equipped with The upper surface of the second layer is formed at a position higher than the height of the surrounding surface of the second layer, The surrounding surface is a road surface that exists before the second layer is formed. structure.

6. A first support; a second support pillar disposed at a distance from the first support pillar; a first layer in which a filling member is filled in a space between the first support and the second support; a second layer formed to a predetermined thickness by laying soil and sand on the first layer; Equipped with The upper surface of the second layer is formed at a position higher than the height of the surrounding surface of the second layer. structure.

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