Measuring jig, template jig, and bridge repair and reinforcement method using the same

Abstract

To provide a measurement jig for further easily performing measurement.SOLUTION: A measurement jig 80 used for investigating a position and inclination of an insertion hole 20 of an anchor bolt 150 provided in a concrete bridge pier 10, an abutment or a bridge girder used in bridges when installing a support member 300 used for repairing or reinforcing a bridge, consists of two jigs, an intermediate jig 100 and a tip jig 200 for measurement.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a technique for repairing and strengthening bridges and the like. More specifically, it relates to a technique for detecting the position of anchor bolts when constructing a support member for connecting an upper structure and a lower structure in the replacement of a bearing.

Background Art

[0002] In recent years, triggered by the occurrence of earthquakes and the like, there has been an increasing demand for investigating the seismic resistance of infrastructure and repairing civil structures as necessary. In particular, methods for repairing or strengthening bridges against aging have been explored. A bridge consists of an upper structure such as a bridge girder and a lower structure such as a bridge pier or abutment, and the upper structure is supported by the lower structure by a member called a bearing installed therebetween. Therefore, when repairing or strengthening the bearing, it is necessary to temporarily support the upper structure using a steel support member or the like supported by anchor bolts installed in the lower structure.

[0003] Patent Document 1 discloses a technique related to a measuring jig. A measuring jig having a female screw portion for screwing onto the tip of an anchor bolt provided on a lower structure such as a bridge pier, an orthogonal plane orthogonal to the axis of the anchor bolt screwed into the female screw portion, and a marker plate having a center detection mark is used. By installing the marker plate on this orthogonal plane, the position and inclination of the anchor bolt can be detected. Using this measuring jig facilitates the manufacture of fittings for connecting the upper and lower structures of a bridge and enables its use for repairing and strengthening bearings.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, when using the technology described in Patent Document 1, it is necessary to attach the measurement jig to the tip of the anchor bolt after fixing the anchor bolt to the pier. That is, it is necessary to open an insertion hole for the anchor bolt in the pier and fix the anchor bolt in the insertion hole using an adhesive or the like. This fixation of the anchor bolt requires a corresponding amount of time, and depending on the outside air temperature, this time may be prolonged. Also, the fact that the measurement work cannot be carried out until all of the numerous anchor bolts are fixed is also a factor contributing to the time consumption.

[0006] Therefore, an object of the present invention is to solve such problems and provide a measurement jig that enables easier measurement, a template jig that assists it, and a bridge repair and reinforcement method using these.

Means for Solving the Problems

[0007] In order to achieve the above object, the measurement jig according to one aspect of the present invention has the following features.

[0008] (1) In a measurement jig used to investigate the position and inclination of an anchor bolt insertion hole provided in a concrete pier, abutment, or bridge girder used for the bridge when attaching a support member for repairing or reinforcing the bridge, It is characterized by comprising a shaft portion inserted into the anchor bolt insertion hole and a marker plate arranged orthogonally to the central axis of the anchor bolt insertion hole. It is characterized by the above.

[0009] According to the aspect described in (1) above, it is possible to more easily measure the position of the anchor bolt insertion hole. Instead of fixing the anchor bolt and then using a measuring jig as in the measuring jig described in Patent Document 1, by inserting a measuring jig having a shaft portion into the anchor bolt insertion hole, a marker plate is arranged perpendicular to the anchor bolt insertion hole, and it becomes possible to obtain the position of the anchor bolt insertion hole in the procedure shown in Patent Document 1. By adopting such a procedure, it is possible to obtain the position of the anchor bolt insertion hole without waiting for the time until the anchor bolt is fixed in the anchor bolt insertion hole provided in a pier or the like.

[0010] (2) In the measuring jig described in (1), It is composed of a first jig having the shaft portion and a second jig having the marker plate. It is preferable to engage and use the second jig with the first jig. is preferable.

[0011] According to the aspect described in (2) above, since it can be separated into a first jig having a shaft portion that directly touches the concrete and a second jig having a marker plate, it can be easily replaced when the shaft portion is damaged, and it can contribute to cost reduction of the measuring jig. For example, by using the measuring jig (corresponding to the second jig) described in Patent Document 1 and engaging and using it with the first jig, the position of the anchor bolt insertion hole can be measured using the measuring jig before fixing the anchor bolt in the anchor bolt insertion hole.

[0012] (3) In the measuring jig described in (1) or (2), The first jig has a male screw portion formed on the extension line of the shaft portion, and a head portion formed between the shaft portion and the male screw portion. The second jig has a female screw portion for screwing with the male screw portion, and the marker plate having a center detection mark provided on a plane orthogonal to the central axis of the female screw portion. When the first jig and the second jig are screwed together and the shaft portion is inserted into the anchor bolt insertion hole, the marker plate is arranged orthogonally to the central axis of the anchor bolt insertion hole. This is preferable.

[0013] According to the aspect described in (3) above, since the first jig and the second jig can be coupled by screwing, it is possible to easily separate and replace the first jig and the second jig. Further, by screwing the first jig and the second jig in advance, it is possible to further shorten the working time.

[0014] (4) In the measuring jig according to (2) and (3) above, the shaft portion and the head of the first jig are made of resin, and the male screw portion is embedded in the head and integrally formed. This is preferable.

[0015] According to the aspect described in (4) above, it is possible to manufacture the first jig at low cost. Although the first jig is a part that is more likely to be consumed because it directly contacts the concrete compared to the second jig, for example, by using a hexagonal bolt for the male screw portion and integrally molding it in such a way that the head of the screw is embedded in the head, it is possible to manufacture it at low cost.

[0016] Also, in order to achieve the above object, a template jig according to another aspect of the present invention has the following characteristics.

[0017] (5) It includes a plurality of through holes corresponding to the positions of the anchor bolt insertion holes investigated using the measuring jig according to any one of (1) to (4) above, and when an anchor bolt is inserted through and held in the through hole, it is used for positioning when the anchor bolt is fixed to the pier or the abutment or the bridge girder. This is the feature.

[0018] According to the embodiment described in (5) above, by fixing the anchor bolts using the template jig, it is possible to improve the efficiency of the fixing work of the anchor bolts. The anchor bolts are inserted into the previously drilled anchor bolt insertion holes and fixed using a special adhesive. However, in this operation, if the anchor bolts are displaced or tilted, there may be a discrepancy between the data measured using any of the measuring jigs (1) to (4) and the position of the top of the anchor bolts. Therefore, by adopting a method of fixing the top side of the anchor bolts with a template jig and fixing the anchor bolts while maintaining a defined interval, this problem can be solved. Since the anchor bolts are fixed to the template jig, an improvement in workability can also be expected.

[0019] Also, in order to achieve the above object, a method for repairing and strengthening a bridge according to another embodiment of the present invention has the following features.

[0020] (6) Using the measuring jig described in any one of (1) to (4) and the template jig described in (5), fixing the support member to the pier or abutment or bridge girder of the bridge, is characterized by.

[0021] According to the embodiment described in (6) above, by following the operation procedure of measuring the position of the anchor bolt insertion hole using the measuring jig described in any one of (1) to (4) and fixing the anchor bolts to the pier or abutment or bridge girder using the template jig described in (5), the workability in attaching the support member can be improved, and repair and strengthening can be achieved in a short period.

Brief Description of the Drawings

[0022]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiment for Carrying out the Invention

[0023] First, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a perspective view of the intermediate jig 100 of this embodiment. The intermediate jig 100, which is part of the measurement jig, consists of a head 110, a shaft portion 120, and a male screw portion 130, and is used by being inserted into an insertion hole 20 for an anchor bolt 150, which will be described later with reference to FIG. 2. The head 110 and the shaft portion 120 are made of resin and are each formed in a cylindrical shape.

[0024] The head 110 is thicker than the diameter of the shaft portion 120, and the head 110, the shaft portion 120, and the male screw portion 130 are designed such that their respective axes are arranged on the same straight line. The male screw portion 130 embedded in the head 110 is formed in such a shape that the head of a hexagonal bolt (M36 in this embodiment) is embedded in the head 110 of the intermediate jig 100 as shown in FIG. 1, and has a very simple structure.

[0025] Figure 2 shows a cross-sectional view of the intermediate jig 100 (first jig) inserted into the insertion hole 20. The intermediate jig 100 is used by inserting the shaft portion 120 into the insertion hole 20 provided on the side surface of the pier 10 which is a lower structure. And a measurement tip jig 200 is screwed onto the male screw portion 130. The measurement tip jig 200 has a cylindrical structure with a marker plate 202 attached to the top, and a female screw portion 201 is provided on the back surface thereof, which conforms to the content described in Patent Document 1. By combining the intermediate jig 100 and the measurement tip jig 200, it functions as a measurement jig 80.

[0026] Figure 3 shows a perspective view of the measurement tip jig 200. The surface of the marker plate 202 provided on the measurement tip jig 200 (second jig) is black background 202a with a white frame 203 drawn thereon, and it has a position marker 203a provided at one of the four corners of the white frame 203 and an identification marker 204 provided within the white frame 203. Also, on the surface of the measurement tip jig 200 where the marker plate 202 is attached, a center line 200a is provided at a position that equally divides the outer circumference (in this embodiment, into four equal parts) toward the center of the surface where the marker plate 202 is attached. On the other hand, a reference line 202b is provided at the center of the side surface of the marker plate 202 in the thickness direction of the marker plate 202. And the marker plate 202 is arranged so that a line extending the center line 200a intersects the reference line 202b.

[0027] Figure 4 shows a perspective view of the measurement image of the pier 10. Using the measurement jig 80 as shown in Figure 2, the position of the insertion hole 20 (the position of the fixed anchor bolt 150) provided in the pier 10 is measured. Although detailed description is omitted, similar to Patent Document 1, in addition to the measurement jig 80, a marker plate 202 and a scale 210 with marker plates 202 attached to both ends are arranged on the pier 10. In that state, the pier 10 is photographed with a camera to acquire digital data. This digital data is analyzed to calculate the three-dimensional coordinate position, and the position of the insertion hole 20 is acquired from the three-dimensional coordinate position.

[0028] Next, the template jig will be described with reference to the drawings. Fig. 5 shows a cross-sectional view of how the anchor bolt 150 is installed in the insertion hole 20 using the gauge plate 250, which is a template jig. Fig. 6 shows a perspective view of the gauge plate 250 schematically shown. The gauge plate 250 is a thin steel plate (2.3 mm in this embodiment) used for positioning when fixing the anchor bolt 150, as shown in Fig. 5. The gauge plate 250 that sandwiches the tip of the anchor bolt 150 passing through the holding hole 251 with the first nut 255 and the second nut 256 can hold the inclination and distance between the anchor bolts 150. Note that although the gauge plate 250 shown in Fig. 6 is described with four holding holes 251 for convenience of explanation, it does not prevent more holding holes 251 from being drilled.

[0029] The gauge plate 250 is provided with an opening 252 so as to avoid the holding hole 251. The diameter of the holding hole 251 is set to be slightly larger than the diameter of the anchor bolt 150 (1 - 2 mm in this embodiment). This opening 252 is provided for the purpose of reducing the weight of the gauge plate 250 by punching it out and improving the workability in the fixing operation of the anchor bolt 150. Note that in Fig. 6, for simplicity of explanation, only four holding holes 251 are shown provided in the pier 10, but in reality, since a large number of holding holes 251 need to be prepared, it does not prevent the opening 252 from being increased to such an extent that the necessary rigidity of the gauge plate 250 can be ensured.

[0030] The position of the holding hole 251 provided in the gauge plate 250 is determined based on the three-dimensional position information obtained from the aforementioned digital data. This digital data is acquired while reflecting the inclination of the insertion hole 20 as shown in Patent Document 1. Therefore, when fixing the anchor bolt 150, even if the insertion hole 20 is inclined, the corresponding holding hole 251 is formed.

[0031] A construction procedure using an intermediate jig 100 corresponding to such a first jig, a measurement tip jig 200 corresponding to the second jig, and a gauge plate 250 will be briefly described. First, as shown in Fig. 2, the intermediate jig 100 is inserted into an insertion hole 20 previously drilled in the pier 10, and the measurement tip jig 200 is screwed onto the male screw portion 130 of the intermediate jig 100. Note that in Fig. 2, for the convenience of explanation, the figure shows the measurement tip jig 200 being screwed on after the intermediate jig 100 is inserted into the insertion hole 20, but the intermediate jig 100 and the measurement tip jig 200 may be screwed together before inserting into the insertion hole 20.

[0032] Then, as shown in Fig. 4, with the marker plate 202 and the scale 210 arranged on the pier 10, a high-resolution camera (not shown) is used to take a photograph to obtain digital data. At this time, it does not prevent the entire image from being taken by dividing the area to be photographed into a plurality of tile-shaped areas. In this case, it is desirable to set the areas so that one or more marker plates 202 or identification markers 204 overlap. This is because the marker plate 202 is provided with an identification marker 204 and can be individually identified, so that the data can be combined after the data is acquired. In this way, three-dimensional position information for calculating the position of the insertion hole 20 for installing the anchor bolt 150 is obtained.

[0033] Next, the gauge plate 250 is manufactured at the factory using the three-dimensional position information. Since the three-dimensional position information is obtained, it is possible to manufacture it in a short time using a laser processing machine or the like. Then, the support member 300 is manufactured using the same three-dimensional position information. Fig. 7 shows a perspective view of the state where the support member 300 is arranged. Fig. 8 shows a perspective view of the state where the support member 300 is arranged. Note that the support member 300 shown in Fig. 7 is schematically shown for the convenience of explanation. After the gauge plate 250 is manufactured, as shown in Fig. 5, the anchor bolt 150 is arranged and fixed at the site.

[0034] The support member 300 has mounting holes 310 drilled at a factory based on three-dimensional position information and is transported to the site. Then, the support member 300 is attached to the pier 10 by inserting the anchor bolts 150 fixed to the pier 10 into the mounting holes 310 and tightening them using nuts 160. An image of the support member 300 attached to the pier 10 is shown in FIG. 8. In the state where the support member 300 is attached in this way, it is adjusted so that the main girder (not shown) can be supported by the top plate 310. Thus, since the main girder is supported by the support member 300 fixed to the pier 10, it becomes possible to replace the bearing (not shown). Note that the invention of the present embodiment is not precluded from being used for the purpose of reinforcing the pier 10 by the support member 300 instead of replacing the bearing.

[0035] Since the measuring jig 80 (configured by combining the intermediate jig 100 and the measuring tip jig 200), the gauge plate 250, and the bridge repair and reinforcement method using the same of the present embodiment have the above-described configuration, they exhibit the following operations and effects.

[0036] First, it becomes possible to easily perform measurement with the measuring jig 80 of the present embodiment. This is because, in the measuring jig 80 used to investigate the position and inclination of the insertion holes 20 of the anchor bolts 150 provided in the concrete pier 10 or abutment used for the bridge when attaching the support member 300 used for repairing or reinforcing the bridge, it is configured of two jigs, namely the intermediate jig 100 and the measuring tip jig 200.

[0037] Specifically, an intermediate jig 100 corresponding to the first jig includes a shaft portion 120 inserted into the insertion hole 20 of the anchor bolt 150, a male screw portion 130 formed on the extension line of the shaft portion 120, and a head portion 110 formed between the shaft portion 120 and the male screw portion 130. And a measurement tip jig 200 corresponding to the second jig includes a female screw portion 201 for screwing with the male screw portion 130, an orthogonal plane orthogonal to the central axis of the female screw portion 201, and a marker plate 202 provided on the orthogonal plane and having a central detection mark. When such an intermediate jig 100 and a measurement tip jig 200 are screwed together and the shaft portion 120 is inserted into the insertion hole 20, the marker plate 202 is arranged orthogonally to the central axis of the insertion hole 20.

[0038] By adopting such a configuration, it is possible to easily measure the position and inclination of the insertion hole 20 for the anchor bolt 150 provided on the side surface of the pier 10. This is because, as the measuring jig 80, not only the measurement tip jig 200 described in Patent Document 1 but also the intermediate jig 100 is combined, and the marker plate 202 can be arranged only by inserting the measuring jig 80 into the insertion hole 20. As shown in the problems, for the fixing of the anchor bolt 150, it is necessary to inject an adhesive or the like into the insertion hole 20 and wait for a predetermined time for the adhesive to cure. And since it is necessary to attach the measurement tip jig 200 and start the measurement after the anchor bolt 150 is fixed, it takes time for that.

[0039] However, by using the intermediate jig 100, that time can be shortened. Also, the measurement work can be done even on days with weather conditions not suitable for using an adhesive. Furthermore, the digital data obtained in the measurement work can be sent from the site to the factory via a communication network such as the Internet, and it becomes possible to start manufacturing the support member 300 at an early stage. Such shortening of time leads to shortening of the total bridge repair work time. As a result, it is possible to realize reduction of the work cost.

[0040] In addition, since the shaft portion 120 and the head portion 110 of the intermediate jig 100 are made of resin and the male screw portion 130 is embedded in the head portion 110 and integrally formed, the cost of the intermediate jig 100 can be reduced. Since the intermediate jig 100 is a component that directly contacts the concrete, it is easily consumable. On the other hand, since the measurement tip jig 200 that requires precision is relatively costly, making the intermediate jig 100 replaceable also leads to suppressing the consumption of the measurement tip jig 200.

[0041] And if the intermediate jig 100 itself is manufactured by embedding a hexagon bolt (M36 in this embodiment) in the male screw portion 130 in the resin and cutting the shaft portion 120 from a steel material or a resinous cylinder, it is possible to achieve the required accuracy at low cost. That is, it is possible to reduce the cost without sacrificing the manufacturing accuracy of the measuring jig 80.

[0042] Further, the gauge plate 250 is provided with holding holes 251 corresponding to a plurality of through holes corresponding to the positions of the insertion holes 20 by using three-dimensional position information, and the anchor bolts 150 are inserted and held in the holding holes 251, so that when the anchor bolts 150 are fixed to the pier 10, it can be used for positioning, thus improving the workability when the anchor bolts 150 are fixed.

[0043] When fixing the anchor bolts 150 using the gauge plate 250, it is possible to prevent the gap and inclination between the anchor bolts 150 from changing. Since the insertion holes 20 are slightly (1 to 2 mm in this embodiment) larger in diameter than the anchor bolts 150, when fixing the anchor bolts 150, the interval and inclination between the anchor bolts 150 may change. However, by fixing the anchor bolts 150 in the insertion holes 20 while holding the anchor bolts 150 using the gauge plate 250, an effect of suppressing such changes in the gap and inclination between the anchor bolts 150 can be obtained.

[0044] Furthermore, since the mounting holes 310 of the gauge plate 250 and the support member 300 are processed based on the same data, the support member 300 can be reliably attached to the anchor bolt 150 installed at the position defined by the holding hole 251 of the gauge plate 250, eliminating the need for on-site modification work on the support member 300 and contributing to shortening the construction time.

[0045] For the gauge plate 250, one with a plate thickness of about 3.2 mm is used, so it is easy to process and transport. On the other hand, since the support member 300 requires rigidity to support the upper structure, steel materials with a thickness of 50 mm or more may be used. Therefore, it takes time for processing. In this regard, if the anchor bolt 150 is fixed using the gauge plate 250 of this embodiment, it becomes possible to perform the fixing work of the anchor bolt 150 within the time for manufacturing the support member 300, contributing to shortening the working time.

[0046] Also, the gauge plate 250 is used in a form as shown in FIG. 5. Specifically, the distance x from the pier 10 is set to be approximately 100 mm, and the gauge plate 250 is provided with an opening 252 for blanking. As a result, while contributing to weight reduction of the gauge plate 250, it is also possible to improve workability.

[0047] In this way, by working using the intermediate jig 100 and the gauge plate 250 together with the measurement tip jig 200, it becomes possible to shorten the attachment time of the support member 300, which ultimately leads to shortening the time required for bridge repair and reinforcement.

[0048] The above is the description of the measuring jig 80 according to the present invention. However, the present invention is not limited thereto, and various modifications are possible without departing from the spirit thereof. For example, regarding the shape and material of the intermediate jig 100, although the head portion 110 and the shaft portion 120 are shown as being made of resin and the male screw portion 130 is shown as being made of metal, it does not prevent changing to appropriate parts. For example, the shaft portion 120 may be changed to a metal one to enhance durability, or the entire intermediate jig 100 may be changed to a metal one. Further, in this embodiment, the case where the support member 300 is attached to the pier 10 is described. However, since the construction can be performed in substantially the same procedure even when attached to the abutment, it does not prevent the application of the present invention.

[0049] Furthermore, it does not prevent the application when installing the anchor bolt 150 on bridge girders such as main girders and cross girders of concrete bridges. In addition, the application of the present invention is not prevented when installing the anchor bolt 150 on the concrete pier 10, abutment, or bridge girder not only during repair and reinforcement of bridges but also during erection.

Description of Reference Numerals

[0050] 10 Pier 20 Insertion Hole 80 Measuring Jig 100 Intermediate Jig 110 Head 120 Shaft Portion 130 Male Screw Portion 150 Anchor Bolt 200 Measuring Tip Jig 201 Female Screw Portion 202 Marker Plate 300 Support Member

Claims

1. In attaching a support member used for repairing or reinforcing a bridge, a measuring jig used for investigating the position and inclination of an anchor bolt insertion hole provided in a concrete pier, abutment, or girder used for the bridge, comprising a first jig having a shaft portion to be inserted into the anchor bolt insertion hole, and a second jig having a marker plate arranged orthogonally to the central axis of the anchor bolt insertion hole, wherein the first jig has a male screw portion formed on an extension line of the shaft portion, and a head portion formed between the shaft portion and the male screw portion, and the second jig has a female screw portion for screwing with the male screw portion, and the marker plate having a center detection mark provided on an orthogonal plane orthogonal to the central axis of the female screw portion, and the first jig and the second jig are screwed together, and the shaft portion is inserted into the anchor bolt insertion hole, whereby the marker plate is arranged orthogonally to the central axis of the anchor bolt insertion hole, A measuring jig characterized by the above.

2. In the measuring jig according to claim 1, the shaft portion and the head portion of the first jig are made of resin, and the male screw portion is embedded in the head portion and integrally formed, A measuring jig characterized by the above.

3. A template jig comprising a plurality of through holes corresponding to the positions of the anchor bolt insertion holes investigated using the measuring jig according to claim 1 or claim 2, and when an anchor bolt is inserted through and held in the through holes, it is used for positioning when the anchor bolt is fixed to the pier, abutment, or girder, A template jig characterized by the above.

4. Using the measuring jig according to claim 1 or claim 2 and the template jig according to claim 3, fixing the support member to the pier or the abutment or the bridge girder of the bridge, A method for repairing and strengthening a bridge, characterized by the above.

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