Bearing structure with reaction force adjustment mechanism, bearing system with reaction force adjustment mechanism, and bearing program with reaction force adjustment mechanism

Abstract

The present invention provides a bearing structure with a reaction force adjustment mechanism capable of suppressing the generation of additional stress on the bridge structure, a bearing system with a reaction force adjustment mechanism, and a bearing program with a reaction force adjustment mechanism. [Solution] The bearing structure with reaction force adjustment mechanism, bearing system with reaction force adjustment mechanism, and bearing program with reaction force adjustment mechanism according to the present invention comprises a bearing interposed between two or more concrete girders and a substructure of a bridge, wherein the vertical height of the bearing can be varied by injecting an injection material.

Description

Technical Field

[0001] The present invention relates to a bearing structure with a reaction force adjustment mechanism, a bearing system with a reaction force adjustment mechanism, and a bearing program with a reaction force adjustment mechanism.

Background Art

[0002] In general, for a bridge, a superstructure such as a bridge girder is installed via a bearing on a substructure made of reinforced concrete such as an abutment or a pier. However, in recent years, the number of bridges that have exceeded the service life of their bearings and fallen into dysfunction has been increasing. For this reason, as disclosed in Patent Document 1, replacement of rusted metal shoes and the like with new bearings has been performed.

[0003] Patent Document 1 discloses a bearing replacement method for an existing concrete girder, in which an existing bearing interposed between the existing concrete girder and a substructure is replaced with a new bearing, the method including an anchor hole drilling step of drilling an anchor hole for inserting an anchor of the new bearing in the substructure or the superstructure beside the existing bearing while supporting the existing concrete girder by the existing bearing.

Prior Art Literature

Patent Literature

[0004]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0005] On the other hand, when replacing bearings in a girder bridge, variations in the bearing reaction force of each girder occur due to the influence of bridge deck load and angle. If the bearing reaction force of each girder differs from that before the bearing replacement, it will generate additional stress on the bridge structure. Furthermore, while vertical displacement of the girders is often managed during this bearing replacement, fluctuations in vertical displacement occur in each girder when the load is transferred to the replacement bearing, making it difficult to precisely manage the bearing reaction force and girder installation height.

[0006] However, the technology disclosed in Patent Document 1 does not take into account the variation in the bearing reactions of each girder. As a result, there was a problem in that additional stress was generated in the bridge structure.

[0007] Therefore, the present invention was devised in view of the above-mentioned problems, and its objective is to provide a bearing structure with a reaction force adjustment mechanism, a bearing system with a reaction force adjustment mechanism, and a bearing program with a reaction force adjustment mechanism that can suppress the generation of additional stress on the bridge structure. [Means for solving the problem]

[0008] The bearing structure with a reaction force adjustment mechanism according to the first invention comprises a bearing interposed between two or more concrete girders and a substructure of a bridge, wherein the vertical height of the bearing can be varied by injecting a grout material.

[0009] The bearing structure with a reaction force adjustment mechanism according to the second invention is characterized in that, in the first invention, it comprises two or more bearings interposed between two or more concrete girders and the substructure.

[0010] The bearing system with a reaction force adjustment mechanism according to the third invention is characterized by comprising a bearing structure with a reaction force adjustment mechanism according to the first or second invention, an acquisition means for acquiring stress information relating to the stress on the bearing, and an injection means for injecting the injection material into the bearing based on the stress information acquired by the acquisition means.

[0011] The bearing program with a reaction force adjustment mechanism according to the fourth invention is characterized by causing a computer to perform an acquisition step of acquiring stress information relating to the stress on the bearing of the bearing structure with a reaction force adjustment mechanism according to the first or second invention, and an injection step of injecting the injection material into the bearing based on the stress information acquired in the acquisition step. [Effects of the Invention]

[0012] According to the first to fourth inventions, the bearing structure with a reaction force adjustment mechanism, the bearing system with a reaction force adjustment mechanism, and the bearing program with a reaction force adjustment mechanism of the present invention allow for variations in the vertical height by injecting an injection material into the expansion portion of the bearing. Therefore, by varying the height of the bearing in accordance with the variation in the bearing reaction force of each girder, it is possible to suppress the variation in the bearing reaction force of each girder and to suppress the generation of additional stress on the bridge body.

[0013] In particular, according to the second invention, the bearing structure with a reaction force adjustment mechanism of the present invention comprises two or more bearings interposed between two or more concrete girders and the substructure. This makes it possible to suppress the generation of additional stress on the bridge body by varying the height of each bearing, even when there is an inclination in the bearing reaction force of each girder, for example, by providing bearings on both sides of the concrete girder.

[0014] In particular, according to the third and fourth inventions, the bearing system with a reaction force adjustment mechanism and the bearing program with a reaction force adjustment mechanism of the present invention inject injection material into the bearing based on stress information. This makes it possible to vary the appropriate bearing height according to the bearing reaction force of each girder. Therefore, it is possible to suppress the generation of additional stress on the bridge structure with high precision. [Brief explanation of the drawing]

[0015] [Figure 1] Figure 1 is a vertical cross-sectional view showing an example of a bridge to which the bearing system with a reaction force adjustment mechanism according to the first embodiment is applied. [Figure 2]Figure 2 is a schematic diagram showing an example of the bearing according to the first embodiment. [Figure 3] Figure 3 is a cross-sectional view showing the expansion portion of the bearing according to the first embodiment. [Figure 4] Figure 4(a) is a schematic diagram showing an example of the configuration of an injection device according to the first embodiment, and Figure 4(b) is a schematic diagram showing an example of the function of the injection device according to the first embodiment. [Figure 5] Figure 5 is a flowchart showing an example of the operation of the injection device according to the first embodiment. [Figure 6] Figure 6 is a vertical cross-sectional view showing an example of a bridge to which a bearing system with a reaction force adjustment mechanism according to a second embodiment is applied. DETAILED DESCRIPTION OF THE INVENTION

[0016] First Embodiment Hereinafter, an example of a bearing system with a reaction force adjustment mechanism according to a first embodiment to which the present invention is applied will be described with reference to the drawings.

[0017] Figure 1 is a vertical cross-sectional view showing an example of a bridge 1 to which the bearing system with a reaction force adjustment mechanism according to the first embodiment is applied. As shown in Figure 1, the bridge 1 according to the present embodiment is a reinforced concrete bridge, in which a superstructure 3 is placed on a substructure 2 such as a pier or abutment via a plurality of bearings 4. The alternate long and short dash line indicates the central axis of the bridge 1, and the right half of the symmetric structure is omitted for illustration.

[0018] The illustrated superstructure 3 includes a plurality of reinforced concrete concrete girders 5, a reinforced concrete concrete deck slab 6 provided on these concrete girders 5, and a reinforced concrete parapet 7 erected along the edge of the concrete deck slab 6. The plurality of concrete girders 5 are integrated by cross girders 8 at predetermined intervals in the bridge axis direction. A pavement 9 made of asphalt is laid on the concrete deck slab 6.

[0019] Further, the bearing system 100 with a reaction force adjustment mechanism further comprises a high-pressure injector 41 and a pressure gauge 43 connected to the bearing 4, a hydraulic pump 42 connected to the high-pressure injector 41, and an injection device 40 connected to the high-pressure injector 41, the pressure gauge 43 and the hydraulic pump 42.

[0020] Figure 2 is a schematic diagram showing an example of the bearing 4 according to the first embodiment. The bearing 4 has anchors 44 provided at the upper and lower parts, and an expansion part 45 provided between the anchors 44. The bearing 4 is interposed between the concrete girder 5 and the substructure 2, for example, by embedding the upper and lower anchors 44 into the concrete girder 5 and the substructure 2 respectively.

[0021] Figure 3 is a cross-sectional view showing the expansion part 45 of the bearing 4 according to the first embodiment. The expansion part 45 comprises a jack 451 that expands when an injection material 455 is injected thereinto, disk-shaped bearing plates 452 provided above and below the jack 451, an injection port 453 for injecting the injection material 455 into the jack 451, and an air hole 454 for discharging air from the jack 451.

[0022] The bearing plate 452 is formed of, for example, steel or high-strength FRP (Fiber Reinforced Plastics). The injection material 455 is, for example, water or mortar, but is not limited thereto, and any material may be used.

[0023] The hydraulic pump 42 is a pump that delivers the injection material 455 such as water stored therein to the high-pressure injector 41. The high-pressure injector 41 is a device that applies pressure to the injection material 455 delivered from the hydraulic pump 42 and injects the material into the expansion part 45 of the bearing 4. Each pressure gauge 43 is an instrument that measures stress information related to the stress applied to the bearing 4.

[0024] The injection device 40 is a device that injects injection material 455 into the expansion portion 45 of the support 4 via a hydraulic pump 42 and a high-pressure injector 41. The injection device 40 may be an electronic device such as a personal computer (PC), or it may be an electronic device such as a smartphone, tablet terminal, wearable terminal, IoT (Internet of Things) device, or a single-board computer such as Raspberry Pi®.

[0025] Next, an example of the injection device 40 in the first embodiment will be described with reference to Figure 4. Figure 4(a) is a schematic diagram showing an example of the configuration of the injection device 40 in the first embodiment, and Figure 4(b) is a schematic diagram showing an example of the function of the injection device 40 in the first embodiment.

[0026] The injection device 40, as shown in Figure 4(a) for example, comprises a housing 17, a CPU (Central Processing Unit) 101, a ROM (Read Only Memory) 102, a RAM (Random Access Memory) 103, a storage unit 104, and I / F 105-107. The CPU 101, ROM 102, RAM 103, storage unit 104, and I / F 105-107 are connected by an internal bus 110.

[0027] The CPU 101 controls the entire injection device 40. The ROM 102 stores the operation code of the CPU 101. The RAM 103 is a work area used when the CPU 101 is operating. The storage unit 104 stores various information such as stress information. The storage unit 104 can be a data storage device such as an HDD (Hard Disk Drive), SSD (Solid State Drive), SD card, or miniSD card. For example, the injection device 40 may also have a GPU (Graphics Processing Unit), which is not shown.

[0028] I / F105 is an interface for sending and receiving various types of information via a public communication network (not shown). I / F106 is an interface for sending and receiving information with the input unit 108. For example, a keyboard is used as the input unit 108, and users of the injection device 40 input various types of information or control commands for the injection device 40 via the input unit 108. I / F107 is an interface for sending and receiving various types of information with the display unit 109. The display unit 109 outputs various types of information stored in the storage unit 104, or the processing status of the injection device 40. A display is used as the display unit 109, and may be a touch panel type, for example.

[0029] The injection device 40 comprises an acquisition unit 16, a processing unit 12, an output unit 14, and a storage unit 15. The acquisition unit 16, processing unit 12, output unit 14, and storage unit 15 shown in Figure 4(b) are realized by the CPU 101 executing a program stored in the storage unit 104, etc., using the RAM 103 as a working area, and may be controlled by artificial intelligence, for example.

[0030] The acquisition unit 16 acquires various types of information, such as stress information. The acquisition unit 16 acquires stress information, for example, via the pressure gauge 43. Alternatively, it may acquire various types of information from a server (not shown) or via a public communication network (not shown). The frequency and period at which the acquisition unit 16 acquires various types of information are arbitrary.

[0031] The processing unit 12 performs various processes. For example, based on the stress information acquired by the acquisition unit 16, the processing unit 12 determines the amount of injection material 455 to be injected into the expansion portion 45 of the bearing 4.

[0032] The output unit 14 outputs various information. The output unit 14 transmits various information to the display unit 109 via the I / F 107.

[0033] The memory unit 15 retrieves various information stored in the storage unit 104 as needed. The memory unit 15 stores various information acquired or output by the acquisition unit 16, the processing unit 12, and the output unit 14 in the storage unit 104.

[0034] Next, an example of the operation of the bearing system 100 with a reaction force adjustment mechanism in the first embodiment will be described. Figure 5 is a flowchart showing an example of the operation of the bearing system 100 with a reaction force adjustment mechanism in the first embodiment.

[0035] First, in step S1, the acquisition unit 16 acquires stress information. The stress information is information relating to the stress applied to each bearing 4. The stress information may also be information indicating the pressure applied to inject the injection material 455 into the expansion portion 45 of the bearing 4. Alternatively, the stress information may be information indicating the amount of change in stress applied to the bearing 4 over time. In step S1, the acquisition unit 16 acquires the stress information measured by the pressure gauge 43. The acquisition unit 16 stores the stress information in the storage unit 104, for example, via the memory unit 15.

[0036] Next, in step S2, the processing unit 12 determines the amount of injection material 455 based on the stress information acquired by the acquisition unit 16 in step S1. The processing unit 12 may determine the injection amount so that the stress on each support 4 is equal, for example. The processing unit 12 also refers to a learning model that has been trained using learning data in which stress information is input data and injection amount is output data, for example, and outputs the injection amount based on the stress information acquired in step S1.

[0037] Next, in step S3, the injection device 40 injects the injection material 455 into the expansion portion 45 of the support 4 via the hydraulic pump 42 and the high-pressure injector 41 in the amount determined in step S2.

[0038] This completes the operation of the bearing system 100 with reaction force adjustment mechanism in the first embodiment. By varying the height of the bearings 4 in accordance with the variation in the reaction force of the bearings 4 of each concrete girder 5, it is possible to suppress the variation in the reaction force of the bearings 4 of each concrete girder 5 and suppress the generation of additional stress on the bridge structure.

[0039] <Second Embodiment> A second embodiment of the present invention will now be described with reference to the drawings. Figure 6 is a vertical cross-sectional view showing an example of a bridge 1 to which the bearing system 100 with a reaction force adjustment mechanism in the second embodiment is applied. The bearing system 100 with a reaction force adjustment mechanism in the second embodiment differs from the first embodiment in that it comprises two or more bearings 4 interposed between the concrete girder 5 and the substructure 2, respectively. The description of aspects similar to those in the first embodiment will be omitted below.

[0040] As shown in Figure 6, the bridge 1 according to this embodiment includes two or more bearings 4 interposed between the concrete girder 5 and the substructure 2. The bridge 1 includes, for example, anchoring blocks 10 attached to both sides of the concrete girder 5, and bearings 4 interposed between the anchoring blocks 10 on both sides and the substructure 2. The bridge 1 also includes anchor holes 20 drilled in the substructure 2.

[0041] The anchoring block 10 is a rectangular block made of reinforced concrete and has the function of anchoring the upper anchor A2 of the support 4. The anchoring block 10 is also provided close to both sides of the concrete girder 5 in the direction of the support line of the support 4. The anchoring block 10 is attached to both sides of the concrete girder 5 by inserting the lateral bracing PC steel members 11 through PC steel member holes 50 drilled so as to penetrate the anchoring block 10 and the concrete girder 5. In the case of a bridge 1 with an angle, the anchoring block 10 may also be positioned in a direction that matches the angle.

[0042] Furthermore, two or more bearings 4 are provided for each concrete girder 5 by fixing the upper anchor A2 to the anchoring block 10 and the lower anchor A1 to the anchor hole 20 of the substructure 2. This allows for the suppression of additional stress on the bridge structure by varying the height of each bearing 4, even if there is an inclination in the reaction force of the bearings 4 on each concrete girder 5, for example, by providing bearings 4 on both sides of the concrete girder 5.

[0043] Although the first and second embodiments of the present invention have been described, these embodiments are presented as examples only and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims of the invention and its equivalents. [Explanation of Symbols]

[0044] 1: Bridge 2: Substructure 20: Anchor hole 3:Superstructure 4: Bearing 5: Concrete girder 50:PC steel hole 6: Concrete slab 7: Railing 8: Crossbeam 9: Pavement 10: Fixing block 11: Horizontally clamped PC steel 12: Processing Unit 14: Output section 15: Storage part 16: Acquisition part 17: Cabinet 40: Injection device 41: High-pressure injector 42: Hydraulic pump 43: Pressure gauge 44: Anchor 45: Expansion part 100: Bearing system with reaction force adjustment mechanism 101:CPU 102:ROM 103:RAM 104: Preservation Department 105: I / F 106: I / F 107: I / F 108: Input section 109:Display section 110: Internal bus 451: Jack 452: Bearing plate 453: Inlet 454: Air vent 455: Injection material

Claims

1. The bridge is equipped with bearings interposed between two or more concrete girders and the substructure, The aforementioned support is capable of varying its vertical height by injecting a material. A bearing structure with a reaction force adjustment mechanism, characterized by the following features.

2. The system includes two or more of the aforementioned concrete girders and two or more of the aforementioned supports interposed between each of the aforementioned substructures. A bearing structure with a reaction force adjustment mechanism according to claim 1, characterized in that

3. A bearing structure with a reaction force adjustment mechanism as described in claim 1 or claim 2, An acquisition means for acquiring stress information related to the stress on the aforementioned support, The system includes an injection means for injecting the injection material into the support based on the stress information obtained by the acquisition means. A bearing system with a reaction force adjustment mechanism, characterized by the following features.

4. An acquisition step for acquiring stress information relating to the stress on the bearing of the bearing structure with a reaction force adjustment mechanism described in claim 1 or claim 2, Based on the stress information obtained in the acquisition step, the computer is instructed to perform an injection step in which the injection material is injected into the bearing. A bearing program with a reaction force adjustment mechanism, characterized by the following features.

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