Box girder type bridge joint width measuring device

Abstract

The utility model provides a box girder type bridge joint width measuring device, which relates to the technical field of box girder construction and comprises a support and a measuring assembly. The bracket comprises a first vertical rod, a second vertical rod, a first horizontal rod and a positioning plate; the measuring assembly comprises a measuring tape piece, a sliding block, a first rod body, a second rod body and an operating rod, the measuring tape piece is arranged on the first vertical rod, the sliding block movably sleeves the first horizontal rod, the first rod body is connected with the top of the sliding block, the second rod body is connected with the bottom of the sliding block, the first rod body and the second rod body are coaxially arranged, and the operating rod is arranged on the operating rod. One end of the operating rod is rotatably connected to the sliding block. In a measuring state, the free end of the ruler of the measuring tape piece is installed on the second vertical rod, and the second vertical rod and the second rod body abut against the two adjacent box girders respectively. According to the box girder type bridge joint width measuring device, the distance between the to-be-installed box girder and the erected box girder can be rapidly and accurately measured, and the installation speed and the installation efficiency of the box girder can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of box girder construction, and in particular to a device for measuring the joint width of a box girder bridge. Background Art

[0002] Box girder bridges are widely used in road projects with bridge structures such as highways and urban elevated roads due to their advantages such as reasonable force system, high load level, short construction period and good structural performance.

[0003] In the construction process of box girder bridges, a bridge erection machine is generally used to place the prefabricated box girders of the bridge on the bridge piers in sequence. During the construction process, it is more important to ensure that each box girder can be accurately built at the designed position.

[0004] At present, when the bridge erection machine is lifting the box girder, it is generally necessary to combine the real-time observation of the on-site personnel to determine whether the box girder is in place, and to make real-time fine adjustments when the bridge erection machine is lowering the box girder to the bridge pier, so that the box girder can be aligned with the preset position on the bridge pier. However, this operation method is not only time-consuming, resulting in low box girder installation efficiency, but also requires a high level of experience and cooperation from the on-site personnel.

[0005] The applicant retrieved the following existing related technologies through the search formula "(box girder or bridge) and installation and spacing":

[0006] Prior art 1, Chinese patent document with publication number: CN202899044U (hollow box-shaped double-beam bridge-erecting machine), is a currently commonly used bridge-erecting machine (i.e., the front legs of the bridge-erecting machine are supported on the bridge piers, and the rear legs of the bridge-erecting machine are supported on the installed box beams, and then the box beams to be installed are hoisted by a lifting vehicle). However, in the process of hoisting the box beams, there is no corresponding spacing detection equipment, and the position adjustment of the box beams can only be achieved by relying on the observation of on-site personnel and the cooperation between the on-site personnel and the lifting vehicle control personnel.

[0007] Prior art 2, the Chinese patent document with publication number: CN110820573B (Construction method of steel-concrete composite beams for high-pier and long-span bridges in mountainous areas), is to improve the assembly quality of steel-concrete composite beams by setting detachable telescopic joints on the front and rear legs of the bridge erecting machine and using a beam transporter as a counterweight of the overhead crane to improve the positioning accuracy of the steel-concrete composite beams. However, the method of improving the positioning accuracy of steel-concrete composite beams by improving the assembly quality of steel-concrete composite beams has high requirements for construction accuracy, and there is still the problem of requiring observation by on-site personnel and cooperation between on-site personnel and overhead crane control personnel to achieve the position adjustment of the steel-concrete composite beams. Utility Model Content

[0008] In order to solve the technical problems in the related art, the present application provides a device for measuring the width of a box girder bridge joint.

[0009] In order to achieve the above purpose, the technical solution adopted in this application is:

[0010] A box girder bridge joint width measuring device, comprising:

[0011] A bracket, the bracket comprising a first vertical rod and a second vertical rod arranged opposite to each other, a first horizontal rod connected between the first vertical rod and the second vertical rod, and a positioning plate connected to the first vertical rod, the first vertical rod, the second vertical rod and the first horizontal rod together forming a U-shaped structure, and the positioning plate is used to abut against the surface of the box beam;

[0012] A measuring assembly, comprising a measuring tape, a slider, a first rod, a second rod and an operating rod, wherein the measuring tape is arranged on the first vertical rod, and the extension direction of the ruler of the measuring tape faces the second vertical rod, the slider is movably sleeved on the first horizontal rod, the first rod is arranged in a vertical direction and the bottom of the first rod is connected to the top of the slider, the second rod is arranged in a vertical direction and the top of the second rod is connected to the bottom of the slider, and the first rod and the second rod are coaxially arranged, and one end of the operating rod is rotatably connected to the slider;

[0013] The box-girder bridge joint width measuring device includes a measuring state, in which the free end of the scale of the tape measure is installed on the second vertical rod, the second vertical rod abuts against the side of one of the two adjacent box girders, and the second rod body abuts against the other of the two adjacent box girders.

[0014] Optionally, the positioning plate includes a first part and a second part, the first part is connected to the bottom of the first vertical rod, the second part is formed in a triangular plate shape, and the second part is connected to the first horizontal rod.

[0015] Optionally, the operating rod includes a connecting section and a handle member that are coaxially connected, one end of the connecting section away from the handle member is rotatably connected to the slider, and a radial dimension of the handle member is larger than a radial dimension of the connecting section.

[0016] Optionally, an outer peripheral surface of the handle is formed with anti-slip patterns.

[0017] Optionally, the first vertical rod is formed as an iron rod, and a bar magnet is provided on the connecting section, and the bar magnet is configured to be able to be magnetically adsorbed on the first vertical rod in the measuring state.

[0018] Optionally, the measuring assembly further comprises a fastening bolt;

[0019] A first through hole is formed on the top of the second vertical rod along the extension direction of the scale, the first through hole penetrates the second vertical rod, the first through hole is used for the scale to pass through, a second through hole is also formed on the second vertical rod, the extension direction of the second through hole is perpendicular to the extension direction of the first through hole, the first through hole and the second through hole are connected to each other, and an internal thread matching the fastening bolt is formed in the second through hole;

[0020] In the measuring state, the scale is inserted into the first through hole, the fastening bolt is threadedly connected to the second through hole, and the fastening bolt abuts against the scale.

[0021] Optionally, the first horizontal rod is formed as a cylindrical structure.

[0022] Optionally, the first horizontal rod is formed as a hollow structure.

[0023] Optionally, the second vertical rod, the first rod body and the second rod body are formed as wooden rods or plastic rods.

[0024] Optionally, the bracket further comprises a second horizontal rod, which is arranged in the same direction as the first horizontal rod and is located above the first horizontal rod, one end of the second horizontal rod is connected to the first vertical rod, and the other end of the second horizontal rod is connected to the second horizontal rod;

[0025] Wherein, a through slide is formed on the second horizontal rod, and the through slide is used for the second rod body to pass through.

[0026] Beneficial effects:

[0027] 1. Through the above technical scheme, in the process of moving the box girder to be installed to above the designed position, the box girder bridge joint width measuring device of the present application can quickly and relatively accurately measure the distance between the box girder to be installed and the erected box girder (i.e., the joint width of the box girder bridge), which is conducive to enabling the box girder to be installed to be moved to above the designed position relatively quickly and accurately, and in this measurement process, it can reduce the reliance on the construction experience of on-site personnel, which is conducive to improving the installation speed and efficiency of the box girder, and further conducive to improving the erection efficiency of the bridge.

[0028] Specifically, in the present application, in the process of moving the box girder to be installed to above the designed position, the free end of the scale of the tape measure can be first installed on the second vertical rod, and the second vertical rod is placed against the side of the box girder to be installed in a direction parallel to the side of the box girder to be installed, and then the position of the second rod body is adjusted by the operating rod so that the second rod body is placed against the side of the erected box girder in a direction parallel to the side of the erected box girder. In this way, the spacing between the box girder to be installed and the erected box girder can be read according to the position indicated by the first rod body on the scale, so that the adjustment distance and direction can be quickly and accurately obtained by comparing the spacing with the designed spacing, which is conducive to quickly and accurately moving the box girder to be installed to just above the designed position.

[0029] 2. Other beneficial effects or advantages of the present application will be described in detail in conjunction with the specific structure in the specific implementation manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative labor. In addition, it should be understood that the proportional relationship of the various components in the drawings of this specification does not represent the proportional relationship in the actual material selection and design, which is only a schematic diagram of the structure or position, where:

[0031] Figure 1 1 is a schematic diagram of a measurement state of a box girder bridge joint width measuring device provided by an exemplary embodiment of the present application, wherein three adjacent box girders are also shown, and the box girder bridge joint width measuring device is arranged on the top of the upper beam plate of the box girder;

[0032] Figure 2 1 is a schematic diagram of a measurement state of a box-beam bridge joint width measuring device provided by an exemplary embodiment of the present application, wherein a box beam is also shown, and the beam bridge joint width measuring device is arranged on the top of the lower beam plate of the box beam;

[0033] Figure 3 is a schematic diagram of the three-dimensional structure of a box girder bridge joint width measuring device provided by an exemplary embodiment of the present application;

[0034] Figure 4 yes Figure 3 A schematic diagram of the enlarged local structure at point A in the middle;

[0035] Figure 5 yes Figure 3 A magnified schematic diagram of the local structure at B in the middle;

[0036] Figure 6 1 is a schematic diagram of a connection structure of a slider and an operating rod provided in an exemplary embodiment of the present application, wherein a first rod body and a second rod body are also shown.

[0037] Description of the reference numerals in the accompanying drawings:

[0038] 100-box girder bridge joint width measuring device; 200-box girder; 1-bracket; 11-first vertical rod; 12-second vertical rod; 121-first through hole; 122-second through hole; 13-first horizontal rod; 14-positioning plate; 141-first part; 142-second part; 15-second horizontal rod; 151-through slide; 2-measuring assembly; 21-tape measure; 211-ruler; 22-slider; 23-first rod body; 24-second rod body; 25-operating rod; 251-connecting section; 252-handle means; 26-fastening bolt. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0041] In the description of this application, it should be noted that the terms used, such as "top surface" and "bottom surface", refer to the top surface of the upward side and the bottom surface of the downward side of the box girder bridge joint width measuring device of this application in the use state; the terms used, such as "first" and "second", are only used to distinguish the expressions, and do not indicate or imply that they have a difference in importance or order; the terms used, such as "inside" and "outside", refer to the inside and outside of a specific contour. The use of the above terms is only to facilitate the clear and simple description of the technical solution of this application, and cannot be understood as a limitation of this application.

[0042] In order to facilitate relevant personnel to have a clearer understanding of the technical solution of this application, the existing related technologies are described in more detail below. It should be noted that, in order to simplify the description, this application only describes the bridge erection process (other related processes can refer to the existing technology, such as the manufacturing and transportation process of the box girder, the bridge pier construction process, the bridge erection machine assembly process, etc.).

[0043] At present, the construction process of box girder bridges generally includes: the beam transport vehicle transports the box girder to be installed along the erected box girder to the bridge erection machine, and the box girder to be installed is hoisted by the hoisting vehicle of the bridge erection machine (at present, a through hole is generally reserved on the box girder, and then the hydraulic rod of the hoisting vehicle is extended into the through hole, and the two are fixed together with a bolt structure, so that the hoisting vehicle can hoist the box girder), the hoisting vehicle moves and transports the box girder to be installed to above the designed position, and then the hoisting vehicle controls the box girder to be installed to gradually descend. During the descent of the box girder to be installed, the on-site personnel observe and measure whether the box girder to be installed corresponds to the designed position on the bridge pier. If not, the hoisting vehicle control personnel are notified to make adjustments until it is adjusted to the corresponding designed position, and then the box girder to be installed falls on the bridge pier, and then the next step of grouting, wet connection and other construction steps can be carried out.

[0044] In the above process, when the lifting vehicle is lifting the box girder to be installed to above the designed position, it is generally necessary for on-site personnel on the bridge pier and on-site personnel on the erected box girder to observe in real time and provide real-time guidance to the control personnel of the lifting vehicle, so that the installed box girder can be moved more accurately to above the designed position. In addition, when the lifting vehicle is controlling the box girder to gradually descend to the bridge pier, the on-site personnel also need to observe in real time whether the box girder accurately corresponds to the designed position on the bridge pier. If there is a mismatch, it is necessary to observe in real time and cooperate with the control personnel of the lifting vehicle to fine-tune the position of the box girder so that the box girder can correspond to the designed position on the bridge pier.

[0045] It can be seen that during the construction process of a box girder bridge, it takes a long time to determine whether the position of the box girder has reached the designed position, which has a great impact on the erection speed and efficiency of the bridge.

[0046] In view of this, the present application designs a box girder bridge joint width measuring device, which can quickly and relatively accurately measure the distance between the box girder to be installed and the erected box girder during the construction process of the box girder bridge, which is conducive to improving the erection efficiency of the box girder bridge.

[0047] The technical solution of the present application is described in detail below with reference to the accompanying drawings.

[0048] Example 1

[0049] like Figures 1 to 6 As shown, this embodiment provides a box girder bridge joint width measuring device 100, including a bracket 1 and a measuring assembly 2. The bracket 1 includes a first vertical rod 11 and a second vertical rod 12 arranged opposite to each other, a first horizontal rod 13 connected between the first vertical rod 11 and the second vertical rod 12, and a positioning plate 14 connected to the first vertical rod 11. The first vertical rod 11, the second vertical rod 12 and the first horizontal rod 13 together form a U-shaped structure, and the positioning plate 14 is used to abut against the surface of the box girder 200; the measuring assembly 2 includes a tape measure 21, a slider 22, a first rod body 23, a second rod body 24 and an operating rod 25. The ruler member 21 is arranged on the first vertical rod 11, and the extension direction of the ruler 211 of the tape measure member 21 is toward the second vertical rod 12, the slider 22 is movably mounted on the first horizontal rod 13, the first rod body 23 is arranged in the vertical direction and the bottom of the first rod body 23 is connected to the top of the slider 22, the second rod body 24 is arranged in the vertical direction and the top of the second rod body 24 is connected to the bottom of the slider 22, and the first rod body 23 and the second rod body 24 are coaxially arranged, and one end of the operating rod 25 is rotatably connected to the slider 22.

[0050] The box girder bridge joint width measuring device 100 includes a measuring state, in which the free end of the scale 211 of the tape measure 21 is installed on the second vertical rod 12, the second vertical rod 12 abuts against the side of one of the two adjacent box girders 200, and the second rod body 24 abuts against the other of the two adjacent box girders 200.

[0051] Through the above technical scheme, in the process of the box girder 200 to be installed moving to the top of the designed position, the box girder bridge joint width measuring device 100 of the present application can quickly and relatively accurately measure the distance between the box girder 200 to be installed and the erected box girder 200 (i.e., the joint width of the box girder bridge), which is conducive to enabling the box girder 200 to be installed to be moved to the top of the designed position relatively quickly and accurately, and in this measurement process, it can reduce the reliance on the construction experience of on-site personnel, which is conducive to improving the installation speed and installation efficiency of the box girder 200, and further conducive to improving the erection efficiency of the bridge.

[0052] Specifically, in the present application, in the process of moving the box girder 200 to be installed to above the designed position, the free end of the scale 211 of the tape measure 21 can be first installed on the second vertical rod 12, and the second vertical rod 12 can be placed against the side of the box girder 200 to be installed in a direction parallel to the side of the box girder 200 to be installed, and then the position of the second rod body 24 can be adjusted by the operating rod 25, so that the second rod body 24 can be placed against the side of the erected box girder 200 in a direction parallel to the side of the erected box girder 200. In this way, the spacing between the box girder 200 to be installed and the erected box girder 200 can be read according to the position indicated by the first rod body 23 on the scale 211, so that the adjustment distance and direction can be quickly and accurately obtained by comparing the spacing with the designed spacing, which is conducive to quickly and accurately moving the box girder 200 to be installed to just above the designed position.

[0053] Taking a specific implementation as an example, the working process / working principle of this application can be: Please refer to Figure 1 and Figure 3 , the design width of the joint of a box girder bridge is 70 cm. At this time, a box girder 200 has been erected on both sides of the box girder 200 to be installed. When the box girder 200 to be installed is hoisted to the designed position by a lifting vehicle (not shown), the on-site personnel can stand on the left side ( Figure 1 On the top plate of the box beam 200 that has been erected on the left side of the drawing, first install the free end of the scale 211 of the tape measure 21 on the second vertical rod 12, then vertically abut the second vertical rod 12 against the side of the box beam 200 to be installed, and at the same time place the positioning plate 14 on the top plate of the box beam 200 that has been erected on the left side and step on it, and then adjust the position of the second rod body 24 through the operating rod 25, so that the second rod body 24 vertically abuts against the side of the box beam 200 that has been erected on the left side, and then the second rod body 24 can be adjusted according to the The indicated position of the first rod 23 on the scale 211 can be used to read the distance between the box girder 200 to be installed and the erected box girder 200. For example, the read data may be 72 cm. At this time, the control personnel of the lifting vehicle can be notified to control the box girder 200 to be installed to move 2 cm to the right, so that the box girder 200 to be installed can be quickly and accurately adjusted to just above the designed position, and then the box girder 200 to be installed can be controlled by the lifting vehicle to move down to the designed position of the bridge pier.

[0054] It can be understood that, first, the tape measure 21 of the present application is a tape measure type measuring device commonly used in the field of construction technology. Since it has been widely used in the relevant technical field, it will not be described here. Second, in addition to the solution of directly stepping on the position of the positioning plate 14 by the on-site personnel, other counterweights can also be used to fix the position, such as buckets, cement buckets, cement blocks, stones, etc. Third, please refer to Figure 2In addition to being placed on the top plate of the erected box girder 200, the box girder bridge joint width measuring device 100 of the present application can also be placed on the bottom plate of the erected box girder 200. The present application does not specifically limit its use position.

[0055] In one embodiment of the present application, Figure 3 As shown, the positioning plate 14 of the present application may include a first portion 141 and a second portion 142 , the first portion 141 is connected to the bottom of the first vertical rod 11 , the second portion 142 is formed into a triangular plate shape, and the second portion 142 is connected to the first horizontal rod 13 .

[0056] In this way, the first part 141 can not only serve as a foothold for the on-site personnel, but also form a connection relationship with the first vertical rod 11, which is conducive to improving the integrity of the bracket 1 of the present application, and further conducive to improving the stability and measurement accuracy of the bracket 1 of the present application during the measurement process. At the same time, the second part 142 can form a connection relationship with the first horizontal rod 13, so that a relatively reliable connection relationship can be formed between the first vertical rod 11 and the first horizontal rod 13, which is conducive to further improving the stability and measurement accuracy of the bracket 1 of the present application during the measurement process.

[0057] In one embodiment of the present application, Figure 3 and Figure 6 As shown, the operating rod 25 of the present application may include a coaxially connected connecting section 251 and a handle section 252, wherein one end of the connecting section 251 away from the handle section 252 is rotatably connected to the slider 22, and the radial dimension of the handle section 252 is greater than the radial dimension of the connecting section 251. In this way, the handle section 252 is convenient for on-site personnel to hold, so that they can control the position of the second rod body 24 through the operating rod 25.

[0058] In one embodiment of the present application, the outer peripheral surface of the handle of the present application may also be formed with anti-skid patterns (not shown). The anti-skid patterns of the present application have multiple embodiments, for example, the anti-skid patterns may be multi-circle annular anti-skid patterns, or thread-shaped anti-skid patterns, or parallel strip patterns. The present application does not specifically limit the structure and form of the anti-skid patterns.

[0059] In one embodiment of the present application, the first vertical rod 11 of the present application is formed as an iron rod, and a bar magnet (not shown) is provided on the connecting section 251, and the bar magnet is configured to be magnetically adsorbed on the first vertical rod 11 in the measurement state. In this way, after the measurement is completed, that is, when the second vertical rod 12 is attached to the side of the box beam 200 to be installed and the second rod body 24 is attached to the side of the erected box beam 200, the connecting section 251 can be adsorbed on the first vertical rod 11 by using the bar magnet, so that the indicated position of the first rod body 23 can be fixed, which is convenient for on-site personnel to read.

[0060] In one embodiment of the present application, Figure 3 and Figure 4 As shown, the measuring component 2 of the present application may further include a fastening bolt 26; a first through hole 121 is provided at the top of the second vertical rod 12 along the extension direction of the scale 211, the first through hole 121 penetrates the second vertical rod 12, the first through hole 121 is used for the scale 211 to pass through, and a second through hole 122 is also provided on the second vertical rod 12, the extension direction of the second through hole 122 is perpendicular to the extension direction of the first through hole 121, and the first through hole 121 and the second through hole 122 are connected to each other, and an internal thread matching the fastening bolt 26 is formed in the second through hole 122; in the measuring state, the scale 211 is passed through the first through hole 121, the fastening bolt 26 is threadedly connected to the second through hole 122, and the fastening bolt 26 presses against the scale 211.

[0061] In this way, it is helpful to quickly and reliably install the ruler 211 on the second vertical rod 12, which is helpful to improve the measurement efficiency. Specifically, when measurement is required, the ruler 211 can be pulled out from the tape measure 21, and the free end of the ruler 211 is inserted into the first through hole 121, and then the fastening bolt 26 is inserted into the second through hole 122 and the fastening bolt 26 is pressed against the ruler 211, so that the position of the ruler 211 can be quickly and accurately fixed.

[0062] In one embodiment of the present application, Figure 3 As shown, the first horizontal rod 13 of the present application can be formed into a cylindrical structure. Compared with other structures, for example, the first horizontal rod 13 is formed into a square or triangular shape, the cylindrical first horizontal rod 13 can make the slider 22 slide more easily, which is convenient for on-site personnel to adjust the position of the second rod body 24.

[0063] In one embodiment of the present application, the first horizontal rod 13 of the present application can be formed into a hollow structure. In this way, it is helpful to reduce the deadweight of the first horizontal rod 13, which is also helpful to reduce the deadweight of the box beam bridge joint width measuring device 100 of the present application, so that on-site personnel can more conveniently perform measurements.

[0064] In one embodiment of the present application, the second vertical rod 12, the first rod body 23 and the second rod body 24 of the present application can be formed as wooden rods or plastic rods. In this way, it is helpful to reduce the deadweight of the box beam bridge joint width measuring device 100 of the present application, so that the on-site personnel can more conveniently perform the measurement.

[0065] In one embodiment of the present application, Figure 3 and Figure 5 As shown, the bracket 1 of the present application also includes a second horizontal rod 15, which is arranged in the same direction as the first horizontal rod 13 and is located above the first horizontal rod 13, one end of the second horizontal rod 15 is connected to the first vertical rod 11, and the other end of the second horizontal rod 15 is connected to the second horizontal rod 15; wherein a through slide 151 is formed on the second horizontal rod 15, and the through slide 151 is used for the second rod body 24 to pass through.

[0066] Thus, on one hand, the second horizontal rod 15 of the present application can form a frame structure with the first vertical rod 11, the second vertical rod 12 and the first horizontal rod 13, which is conducive to improving the integrity of the bracket 1 of the present application, and is conducive to improving the structural stability of the bracket 1 of the present application during the measurement process, thereby helping to improve the stability and measurement accuracy of the bracket 1 of the present application during the measurement process. On the other hand, the through slide 151 of the second horizontal rod 15 can provide guidance for the movement of the second rod body 24, so that the second rod body 24 can move more stably in the preset direction, which is conducive to improving the measurement accuracy of the present application.

[0067] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A box girder bridge joint width measuring device, characterized in that: include: A bracket (1), the bracket (1) comprising a first vertical rod (11) and a second vertical rod (12) arranged opposite to each other, a first horizontal rod (13) connected between the first vertical rod (11) and the second vertical rod (12), and a positioning plate (14) connected to the first vertical rod (11), the first vertical rod (11), the second vertical rod (12) and the first horizontal rod (13) together forming a U-shaped structure, and the positioning plate (14) being used to abut against the surface of the box beam (200); A measuring assembly (2), comprising a measuring tape (21), a slider (22), a first rod (23), a second rod (24) and an operating rod (25), wherein the measuring tape (21) is arranged on the first vertical rod (11), and the extension direction of the scale (211) of the measuring tape (21) faces the second vertical rod (12), the slider (22) is movably sleeved on the first horizontal rod (13), the first rod (23) is arranged in a vertical direction and the bottom of the first rod (23) is connected to the top of the slider (22), the second rod (24) is arranged in a vertical direction and the top of the second rod (24) is connected to the bottom of the slider (22), the first rod (23) and the second rod (24) are coaxially arranged, and one end of the operating rod (25) is rotatably connected to the slider (22); The box-girder bridge joint width measuring device (100) includes a measuring state, in which the free end of the scale (211) of the measuring tape (21) is mounted on the second vertical rod (12), the second vertical rod (12) abuts against the side of one of the two adjacent box girders (200), and the second rod body (24) abuts against the other of the two adjacent box girders (200).

2. The box girder bridge joint width measuring device according to claim 1, characterized in that: The positioning plate (14) comprises a first part (141) and a second part (142), wherein the first part (141) is connected to the bottom of the first vertical rod (11), and the second part (142) is formed into a triangular plate shape, and the second part (142) is connected to the first horizontal rod (13).

3. The box girder bridge joint width measuring device according to claim 1, characterized in that: The operating rod (25) comprises a coaxially connected connecting section (251) and a handle section (252); one end of the connecting section (251) away from the handle section (252) is rotatably connected to the slider (22); and the radial dimension of the handle section (252) is larger than the radial dimension of the connecting section (251).

4. The box girder bridge joint width measuring device according to claim 3 is characterized in that: The outer peripheral surface of the handle portion (252) is formed with anti-slip patterns.

5. The box girder bridge joint width measuring device according to claim 3, characterized in that: The first vertical rod (11) is formed as an iron rod, and a bar magnet is arranged on the connecting section (251), and the bar magnet is configured to be able to be magnetically adsorbed on the first vertical rod (11) in the measuring state.

6. The box girder bridge joint width measuring device according to claim 1, characterized in that: The measuring assembly (2) further comprises a fastening bolt (26); A first through hole (121) is formed at the top of the second vertical rod (12) along the extension direction of the ruler (211), the first through hole (121) passes through the second vertical rod (12), and the first through hole (121) is used for the ruler (211) to pass through. A second through hole (122) is also formed on the second vertical rod (12), the extension direction of the second through hole (122) is perpendicular to the extension direction of the first through hole (121), and the first through hole (121) and the second through hole (122) are connected to each other, and an internal thread matching the fastening bolt (26) is formed in the second through hole (122); In the measuring state, the scale (211) is inserted into the first through hole (121), the fastening bolt (26) is threadedly connected to the second through hole (122), and the fastening bolt (26) abuts against the scale (211).

7. The box girder bridge joint width measuring device according to claim 1, characterized in that: The first horizontal rod (13) is formed into a cylindrical structure.

8. The box girder bridge joint width measuring device according to claim 7, characterized in that: The first horizontal rod (13) is formed as a hollow structure.

9. The box girder bridge joint width measuring device according to claim 1, characterized in that: The second vertical rod (12), the first rod body (23) and the second rod body (24) are formed as wooden rods or plastic rods.

10. The device for measuring the joint width of a box girder bridge according to any one of claims 1 to 9, characterized in that: The bracket (1) further comprises a second horizontal rod (15), the second horizontal rod (15) being arranged in the same direction as the first horizontal rod (13) and being located above the first horizontal rod (13), one end of the second horizontal rod (15) being connected to the first vertical rod (11), and the other end of the second horizontal rod (15) being connected to the second horizontal rod (15); Wherein, a through slideway (151) is formed on the second horizontal rod (15), and the through slideway (151) is used for the second rod body (24) to pass through.

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