Sample plate assembly for drilling bolted truss girder bridge chord member and drilling method

Abstract

The invention relates to a bolted truss bridge chord member drilling sample plate assembly and a drilling method, a chord member comprises a vertical face and a plane vertically connected with the vertical face, the sample plate assembly comprises a first sample plate capable of covering the vertical face of the chord member, and a second sample plate capable of covering the vertical face of the chord member and provided with a first through hole corresponding to the design position of a hole in the vertical face; the second sample plates correspond to the hole group areas on the vertical face of the chord member, and second through holes are formed in the design positions, corresponding to the holes in the vertical face, of the second sample plates; the end side sample plate is arranged corresponding to the end part of the chord member and comprises a first panel attached to the corresponding part of the vertical surface and a second panel attached to the corresponding part of the plane, and a first positioning hole is formed in the design position, corresponding to a hole in the corresponding part of the vertical surface, of the first panel; and sample plate holes are formed in the design positions, corresponding to the holes in the corresponding parts of the plane, of the second panel. The hole in the chord member is accurately drilled through the hole in the sample plate, the drilling precision of the drill hole in the drill rod can be effectively guaranteed, and then the line shape of a bridge is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of drilling holes in chords of truss bridges, and in particular to a template assembly for drilling holes in chords of bolted truss bridges and a drilling method. Background Art

[0002] Bolted truss bridge refers to a truss beam structure in which the rods are connected by bolts, and the rods on the truss beam and the corresponding bridge deck are also connected by bolts. In this way, a large number of bolt holes need to be set at the connection positions of the rods. Due to the large number of bolt holes, they are also called hole groups. The manufacturing accuracy of the bolt holes on the rods is very important, which can well ensure the linear shape of the truss bridge. In the prior art, the construction of the hole groups on the rods is mostly carried out by a gantry drilling machine, and the hole groups are constructed according to the designed hole positions. However, when the rods are too high or other reasons make it impossible to drill holes by the existing gantry drilling machine, it is necessary to provide a new solution to ensure the manufacturing accuracy of the bolt holes. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a template assembly and a drilling method for drilling holes in bolted truss bridge chords, so as to solve the problem that the existing rods cannot be drilled by the existing gantry drilling machine due to excessive height or other reasons.

[0004] The technical solution to achieve the above purpose is:

[0005] The present invention provides a template assembly for drilling holes in a chord of a bolted truss bridge, wherein the chord comprises a facade and a plane vertically connected to the facade, and the template assembly comprises:

[0006] A first sample plate that can cover the facade of the chord rod, wherein a first through hole is provided on the first sample plate at a design position corresponding to the hole on the facade;

[0007] A second template corresponding to the hole group area on the facade of the chord rod, wherein there are a plurality of second templates, and each second template is provided with a second through hole at a design position corresponding to the hole on the facade;

[0008] An end side template is arranged corresponding to the end of the chord rod, and the end side template is provided with a pair, each including a first panel attached to the corresponding part of the vertical surface and a second panel attached to the corresponding part of the plane, the first panel and the second panel are vertically connected, a first positioning hole is arranged on the first panel at the design position corresponding to the hole at the corresponding part of the vertical surface, and a template hole is arranged on the second panel at the design position corresponding to the hole at the corresponding part of the plane.

[0009] A further improvement of the template assembly for drilling holes in the bolted truss bridge chord of the present invention is that it also includes a lintel template adapted to the elevation of the chord, the lintel template includes a main body plate, a node plate arranged on one side of the main body plate, and a gate-shaped lintel connecting the main body plate and the node plate, and the internal space of the gate-shaped lintel is arranged opposite to the gap between the main body plate and the node plate;

[0010] The main body plate and the node plate are provided with through holes at design positions corresponding to the holes on the facade.

[0011] A further improvement of the template assembly for drilling holes in bolted truss bridge chords of the present invention is that at least one first rib plate is provided on the top surface of the main body plate.

[0012] A further improvement of the template assembly for drilling holes in the bolted truss bridge chord of the present invention is that the outer contour of the first template matches the outer contour of the facade of the chord.

[0013] A further improvement of the template assembly for drilling holes in bolted truss bridge chords of the present invention is that at least one second rib plate is provided on the top surface of the first template.

[0014] A further improvement of the template assembly for drilling holes in bolted truss bridge chords of the present invention is that alignment grooves are provided on the opposite sides of the second template.

[0015] A further improvement of the template assembly for drilling holes in bolted truss bridge chords of the present invention is that long strip-shaped avoidance grooves are provided on the first panel and the second panel near the connection.

[0016] The present invention also provides a method for drilling holes in chords using the template assembly for drilling holes in bolted truss bridge chords, comprising the following steps:

[0017] Providing a chord bar to be drilled, placing the provided chord bar to be drilled on a working surface, and arranging one vertical surface of the chord bar facing upward;

[0018] Providing a first sample, covering the first sample on the upwardly disposed facade, and fixing the first sample after accurate alignment;

[0019] Drilling holes on the vertical surface of the chord rod using the first through hole on the first template, and forming a plurality of second positioning holes in each hole group area on the chord rod during the drilling process;

[0020] removing the first sample;

[0021] Provide a second template, place the second template at the hole group area corresponding to the facade, and realize positioning through the second positioning holes at the corresponding hole group area, and fix the second template after accurate positioning;

[0022] Drill all the holes in the corresponding hole group area using the second through holes on the second template, and remove the second template after completion;

[0023] Flipping the chord rod so that the other vertical surface is facing upward, and repeating the above steps to complete the drilling operation on the other vertical surface;

[0024] flipping the chord bar so that a flat surface on the chord bar faces upward;

[0025] Provide an end side template, buckle the end side template at the end of the chord, align the first positioning hole on the first panel with the hole drilled on the corresponding facade, fix the end side template, and use the template hole on the second panel to drill the hole on the plane, thereby completing the drilling on the chord.

[0026] A further improvement of the method for drilling holes in chords of bolted truss bridge bridges using the template assembly for drilling holes in chords of the present invention is that when the other vertical surface of the chord is arranged upward, a side portion of a plane of the chord is located above a side portion corresponding to the vertical surface;

[0027] When drilling a hole on the other vertical surface of the chord, a lintel template is provided, wherein the lintel template includes a main body plate, a node plate arranged on one side of the main body plate, and a gate-shaped lintel connecting the main body plate and the node plate, wherein the inner space of the gate-shaped lintel is arranged opposite to the gap between the main body plate and the node plate;

[0028] The lintel template is covered on the vertical surface corresponding to the chord rod, and the gap and internal space on the lintel template are used to accommodate the side of the corresponding plane;

[0029] Using the perforations on the main plate and the node plate, a plurality of second positioning holes are drilled in the hole group areas of the corresponding facades;

[0030] Remove the lintel template and provide a second template, place the second template at the hole group area corresponding to the facade, and realize positioning through the second positioning holes at the corresponding hole group area, and fix the second template after accurate positioning;

[0031] The second through hole on the second template is used to drill all the holes in the corresponding hole group area, thereby completing the drilling operation on the other vertical surface of the chord.

[0032] A further improvement of the method for drilling chords of bolted truss bridges using the template assembly for drilling chords of the present invention is that when drilling using the first through hole on the first template, the number of second positioning holes drilled in each hole group area is at least three, and the three second positioning holes are not on the same straight line.

[0033] The beneficial effects of the template assembly for drilling holes in bolted truss bridge chords and the drilling method of the present invention are as follows:

[0034] The present invention designs a variety of matching templates for the chord, accurately drills corresponding holes on the templates, then accurately positions the templates and the chord, and then uses the holes on the templates to accurately drill holes on the chord, which can effectively ensure the accuracy of drilling holes on the chord, thereby ensuring the linear shape of the bridge.

[0035] The present invention designs an end side template, which connects the main plate and the node plate through a gate-shaped lintel, so that the gap between the main plate and the node plate can be used to accommodate the side of the plane on the chord extending out of the side of the facade, and has good adaptability.

[0036] When drilling a chord rod, the present invention uses the first template and the end side template to drill a second positioning hole, and then uses the second template to drill all the holes in the hole group area, thereby improving the turnover utilization rate of the first template and the end side template and effectively improving the drilling operation efficiency.

[0037] The template assembly and the drilling method of the present invention have simple structure, convenient implementation, low cost, and can also meet the requirements for hole making accuracy on the chord rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the three-dimensional structure of the bolted truss bridge chord of the present invention.

[0039] Figures 2 to 9 Schematic diagrams of several styles of the second template in the template assembly for drilling holes in the bolted truss bridge chord of the present invention.

[0040] Fig.10 It is a schematic structural diagram of the template assembly for drilling holes for bolted truss bridge chords of the present invention after the middle and end side templates are connected.

[0041] Fig.11 It is a schematic structural diagram of the first panel in the middle end side template of the template assembly for drilling holes for the bolted truss bridge chord of the present invention.

[0042] Fig.12 It is a schematic structural diagram of the second panel in the end side template of the template assembly for drilling holes in the bolted truss bridge chord of the present invention.

[0043] Fig.13 The present invention is a top view of the lintel template in the template assembly for drilling holes in the bolted truss bridge chord.

[0044] Fig.14 The present invention is a side view of the lintel template in the template assembly for drilling holes in the bolted truss bridge chord.

[0045] Fig.15The present invention provides a top view of a gate-type lintel in a lintel template in a template assembly for drilling holes in a bolted truss bridge chord.

[0046] Fig.16 The present invention is a side view of a gate-type lintel in a lintel template in a template assembly for drilling holes for a bolted truss bridge chord.

[0047] Fig.17 The present invention is a flow chart of a method for drilling holes using a lintel template in a template assembly for drilling holes in a bolted truss bridge chord. DETAILED DESCRIPTION

[0048] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0049] See also Figure 1 The present invention provides a template assembly for drilling holes in a bolted truss bridge chord and a drilling method, which are used to solve the problem that the existing gantry drilling machine cannot be used for drilling holes due to excessive height of the rod or other reasons. The technical solution of the present invention adopts a method of accurately drilling holes on the template, and then uses the holes on the template to drill holes on the chord, which effectively ensures the accuracy of the holes on the chord, and then ensures the linear shape of the bridge. The template assembly for drilling holes in a bolted truss bridge chord and the drilling method of the present invention are described below in conjunction with the accompanying drawings.

[0050] See also Figure 2 , showing a schematic diagram of a style of the second template in the template assembly for drilling holes for bolted truss bridge chords of the present invention. Fig.10 , shows a schematic diagram of the structure of the template assembly for drilling holes for bolted truss bridge chords of the present invention after the middle and end templates are connected. Figure 2 and Fig.10 , the template assembly for drilling holes in the bolted truss bridge chord of the present invention is described.

[0051] like Figure 2 and Fig.10 As shown, the template assembly for drilling holes in the bolted truss bridge chord of the present invention is used for drilling holes in the corresponding parts of the chord, and the chord includes a facade and a plane vertically connected to the facade. The template assembly includes a first template, a second template 21 and an end template 22, wherein the first template can cover the facade of the chord, and a first through hole is provided on the first template at a design position corresponding to the hole on the facade; the second template 21 corresponds to the hole group area on the facade of the chord, and the second template 21 is combined with the end template 22 to form a hole group area on the chord. Figures 2 to 9As shown, there are multiple second templates 21, and the number of the second templates matches the number of hole group areas on the facade of the chord, or matches the type of hole group areas on all chords, that is, a second template 21 is set corresponding to the type of each hole group area, and each second template 21 is provided with a second through hole 211 at a design position corresponding to the hole on the facade; the end side template 22 is set corresponding to the end of the chord, and the end side template 22 is provided with a pair, each including a first panel 221 attached to the corresponding part of the facade and a second panel 222 attached to the corresponding part of the plane, the first panel 221 and the second panel 222 are vertically connected, combined with Fig.11 and Fig.12 As shown, a first positioning hole 223 is provided at a design position of a hole at a corresponding portion of the vertical surface on the first panel 221 , and a template hole 224 is provided at a design position of a hole at a corresponding portion of the plane on the second panel 222 .

[0052] The chord rod of the present invention is a square member, such as Figure 1 As shown, it includes two oppositely arranged vertical panels 11 and two oppositely arranged plane panels 12, wherein the vertical panels 11 are vertically connected to the plane panels 12, and corresponding positions on the sides of the vertical panels 11 are provided with connecting node plates 13 arranged upward and / or downward, and hole groups are provided on the ends of the vertical panels 11 and the plane panels 12 and on the connecting node plates 13, that is, a number of bolt holes arranged horizontally and vertically are provided in corresponding positions or areas. The template assembly of the present invention is used for drilling bolt holes on chord rods.

[0053] When the template assembly of the present invention is used, the vertical surface of the chord rod is first placed on a working surface (such as the surface of a drilling work platform or the ground) with the vertical surface of the chord rod facing upwards, and then the first template is covered on the vertical surface of the chord rod, and then the position of the first template is accurately adjusted to align the first template with the vertical surface of the chord rod, and then the first template and the chord rod are fixed, for example, the first template and the chord rod can be temporarily fixed by a fixing buckle to prevent the first template from being offset or moved, and then the first through hole on the first template is positioned to drill a hole on the vertical surface of the chord rod, that is, the drilling tool is used to drill a hole in a vertical posture. The first through hole on the first sample plate is used to drill holes on the facade of the chord. When drilling holes through the first sample plate, some holes are drilled for each hole group area on the facade of the chord, that is, not all holes in each hole group area are drilled, and some holes are drilled as holes for positioning. Then the first sample plate is hoisted away for turnover use, and then the second sample plate is positioned at the corresponding hole group area through the holes for positioning. After the position is accurately positioned, the second sample plate can be temporarily fixed by driving multiple positioning pins into the corresponding positioning holes. Preferably, the positioning pins are tapered pins. Then the second through hole on the second sample plate is used to drill all the holes in the corresponding hole group area, so that the holes on the facade are drilled. Then the chord can be turned over 180° to set the other facade upward, and then the above steps are repeated to drill the holes on the other facade. Then the chord is turned over 90° to set a plane upward, and a pair of end side sample plates are clamped at the end of the plane. The hole group of the chord at the plane is set at the end of the chord, which is used to connect with another adjacent chord. The first positioning hole on the first panel of the end side template can be aligned with the hole opened on the vertical surface of the chord rod. The first positioning hole is used to realize the positioning of the end side template. After positioning, the first panel can be temporarily fixed by a positioning pin, or temporarily fixed by a fixing buckle. After the position of the first panel is positioned, the position of the second panel is also positioned, and then the holes on the plane are opened using the template holes on the second panel. Some chord rods are only provided with a hole group on one plane, and the drilling operation of the hole group of this type of chord rod is completed at this time. Some chord rods are also provided with a hole group on another plane, so it is necessary to remove the end side template, flip the chord rod 180°, and use the same method to open the holes on the other plane. In this way, the drilling operation of the hole group on a chord rod is completed.

[0054] In a specific embodiment of the present invention, Figures 13 to 16 As shown, the template assembly of the present invention also includes a lintel template 23 adapted to the facade of the chord, the lintel template 23 includes a main plate 231, a node plate 232 arranged on one side of the main plate 231, and a gate-type lintel 233 connecting the main plate 231 and the node plate 232, the internal space of the gate-type lintel 233 is arranged opposite to the gap between the main plate 231 and the node plate 232; the main plate 231 and the node plate 232 are provided with perforations at the designed positions of the holes on the facades corresponding to the holes.

[0055] A door-shaped space is formed inside the door-shaped lintel 233. The main plate 231 and the node plate 232 are connected by the door-shaped lintel 233, so that the lintel template 23 can avoid the protruding edge of the chord. In order to connect the chord with the bridge deck, the side of a plane of the chord protrudes out of the convex connection formed by the side of the corresponding facade. When the facade is set upward, the convex connection is set upward and extends above the facade. At this time, the first sample cannot cover the facade due to the existence of the convex connection. The lintel template 23 can be located at the position of the door-shaped lintel 233 through the setting of the door-shaped lintel 233, and the main plate 231 and the node plate 232 can be aligned with the facade of the chord. After precise alignment, the perforated opposite surfaces on the main plate 231 and the node plate 232 can be used for opening holes.

[0056] The door-shaped lintel 233 includes a beam top plate, a beam bottom plate, beam side plates vertically connected to both sides of the beam top plate and the beam bottom plate, and a gate-shaped plate connected to the beam top plate, the beam side plates and the beam bottom plate; the beam bottom plate is provided with an opening at the gap between the main plate 231 and the node plate 232, and the opening is arranged opposite to the door-shaped space on the door-shaped plate, and a plurality of ribs are provided on the side of the door-shaped plate, and the ribs are supported and connected directly to a pair of beam side plates, and the ribs are also supported and connected to the beam bottom plate, and the other end is vertically connected to the transversely arranged ribs.

[0057] Furthermore, at least one first rib plate 234 is provided on the top surface of the main body plate 231. The first rib plate 234 is provided to enhance the structural strength of the main body plate and improve the service life of the lintel template.

[0058] In a specific embodiment of the present invention, the outer contour of the first sample plate matches the outer contour of the facade of the chord.

[0059] Furthermore, at least one second rib plate is provided on the top surface of the first sample plate. The second rib plate is provided to enhance the structural strength of the first sample plate and improve the service life of the first sample plate.

[0060] In a specific embodiment of the present invention, Figures 2 to 9 As shown, the opposite side of the second template 21 is provided with an alignment groove 212. The alignment groove 212 can be conveniently used to position the second template 21 in the horizontal and vertical directions. The alignment groove 212 can be provided at the middle of the second template 21, and the alignment groove 212 can also be provided at a position on the second template 21 corresponding to the second through holes 211 in the first row, or at a position on the second template 21 corresponding to the second through holes 211 in the last row.

[0061] In a specific embodiment of the present invention, Fig.11 and Fig.12As shown, a long strip-shaped avoidance groove 225 is provided near the connection point on the first panel 221 and the second panel 222. The width of the avoidance groove 225 matches the thickness of the connection node plate provided on the vertical surface of the chord rod. When adjusting the position of the end side template 22, the end side template 22 can be clamped on the corresponding connection node plate through the avoidance groove, thereby preventing the connection node plate from hindering the precise adjustment of the position of the end side template.

[0062] The present invention also provides a method for drilling holes in chords of bolted truss bridges using a template assembly for drilling holes in chords of bolted truss bridges. The drilling method is described below.

[0063] like Fig.17 As shown, the drilling method of the present invention comprises the following steps:

[0064] Execute step S101, provide a chord to be drilled, place the provided chord to be drilled on a working surface, and set one vertical surface of the chord upward; the working surface may be the surface of a drilling work platform or the ground; execute step S102;

[0065] Then, step S102 is executed to provide a first sample board, cover the first sample board on the upwardly disposed vertical surface, and fix the first sample board after accurate alignment; the first sample board can be temporarily fixed by a fixing buckle, and after the first sample board is used, the fixing buckle can be released to lift the first sample board away; step S103 is executed;

[0066] Then, step S103 is executed, using the first through hole on the first sample plate to drill holes on the vertical surface of the chord rod, and during the drilling, a plurality of second positioning holes are drilled in each hole group area on the chord rod; and step S104 is executed;

[0067] Then, step S104 is executed to remove the first sample plate; the first sample plate can be lifted away to perform drilling operations on other chord rods; and step S105 is executed;

[0068] Then, step S105 is executed to provide a second template, place the second template at the hole group area corresponding to the facade, and realize positioning through the second positioning holes at the corresponding hole group area, and fix the second template after accurate positioning; the second template can be temporarily fixed by the positioning pin, and after the second template is used, the positioning pin can be released to lift the second template away; step S106 is executed;

[0069] Then, step S106 is executed, using the second through hole on the second template to drill all the holes in the corresponding hole group area, and after completion, the second template is removed; and step S107 is executed;

[0070] Then, step S107 is executed to flip the chord rod so that the other vertical surface is set upward, and the above steps are repeated to complete the drilling operation on the other vertical surface; step S108 is executed;

[0071] Then, step S108 is executed to flip the chord bar so that a plane on the chord bar is disposed upward; step S109 is executed;

[0072] Then, step S109 is executed to provide an end side template, and the end side template is buckled at the end of the chord rod, so that the first positioning hole on the first panel is aligned with the hole drilled on the corresponding facade, the end side template is fixed, and the hole on the plane is drilled using the template hole on the second panel, thereby completing the drilling on the chord rod. When fixing the end side template, it can be temporarily fixed by a positioning pin or a fixing buckle, and it is also convenient to remove.

[0073] Some chord rods are provided with hole groups on one plane, and some chord rods are provided with hole groups on two planes. For the chord rods provided with hole groups on two planes, after the hole groups are processed on one plane, the chord rod is flipped 180°, and the drilling operation on the other plane is completed in the same way to complete the drilling operation of the chord rod.

[0074] In a specific embodiment of the present invention, when the other vertical surface of the chord is arranged upward, a side portion of a plane of the chord is located above a side portion corresponding to the vertical surface;

[0075] When drilling holes on the other vertical surface of the chord, a lintel template is provided, wherein the lintel template provided includes a main body plate, a node plate arranged on one side of the main body plate, and a gate-shaped lintel connecting the main body plate and the node plate, wherein the inner space of the gate-shaped lintel is arranged opposite to the gap between the main body plate and the node plate;

[0076] The lintel template is covered on the vertical surface corresponding to the chord rod, and the gap and internal space on the lintel template are used to accommodate the side of the corresponding plane;

[0077] Using the perforations on the main plate and the node plate, a plurality of second positioning holes are drilled in the hole group areas of the corresponding facades;

[0078] Remove the lintel template and provide a second template, place the second template at the hole group area corresponding to the facade, and realize positioning through the second positioning holes at the corresponding hole group area, and fix the second template after accurate positioning;

[0079] The second through hole on the second template is used to drill all the holes in the corresponding hole group area, thereby completing the drilling operation on the other vertical surface of the chord rod.

[0080] In a specific embodiment of the present invention, when drilling with the first through hole on the first sample, the number of second positioning holes drilled in each hole group area is at least three, and the three second positioning holes are not in the same straight line. The corresponding plane can be positioned by the three second positioning holes that are not in the same straight line, that is, the position of the second sample can be accurately positioned, a small number of second positioning holes are drilled through the first sample, and then all the holes in the corresponding hole group area are drilled out using the second sample, which can improve the turnover utilization rate of the first sample, effectively improve the drilling operation efficiency, and reduce the production cost of the sample assembly. The size of the second sample is smaller than that of the first sample, so the first sample can be set up with one, and the second sample can be designed in multiple sets according to actual operation requirements.

[0081] In a specific embodiment of the present invention, when drilling holes using the perforations on the lintel template, the number of second positioning holes drilled and formed at each hole group area is at least three, and the three second positioning holes are not on the same straight line. The corresponding plane can be positioned by the three second positioning holes that are not on the same straight line, that is, the position of the second template can be accurately positioned, a small number of second positioning holes are drilled through the lintel template, and then all the holes in the corresponding hole group area are drilled using the second template, which can improve the turnover utilization rate of the lintel template, effectively improve the drilling operation efficiency, and reduce the production cost of the template assembly. The size of the second template is smaller than that of the lintel template, so one lintel template can be set, and multiple sets of second templates can be designed according to actual operation requirements.

[0082] The present invention is described in detail above in conjunction with the embodiments of the accompanying drawings. A person skilled in the art can make various variations of the present invention according to the above description. Therefore, certain details in the embodiments should not constitute a limitation of the present invention, and the scope of protection of the present invention shall be defined by the scope of the attached claims.

Claims

1. A template assembly for drilling holes in a bolted truss bridge chord, wherein the chord comprises a vertical surface and a plane vertically connected to the vertical surface, characterized in that: The template assembly comprises: A first sample plate that can cover the facade of the chord rod, wherein a first through hole is provided on the first sample plate at a design position corresponding to the hole on the facade; A second template corresponding to the hole group area on the facade of the chord rod, wherein there are a plurality of second templates, and each second template is provided with a second through hole at a design position corresponding to the hole on the facade; An end side template is arranged corresponding to the end of the chord rod, and the end side template is provided with a pair, each including a first panel attached to the corresponding part of the vertical surface and a second panel attached to the corresponding part of the plane, the first panel and the second panel are vertically connected, a first positioning hole is arranged on the first panel at the design position corresponding to the hole at the corresponding part of the vertical surface, and a template hole is arranged on the second panel at the design position corresponding to the hole at the corresponding part of the plane.

2. The template assembly for drilling holes in bolted truss bridge chords according to claim 1, characterized in that: It also includes a lintel template adapted to the facade of the chord, the lintel template includes a main body plate, a node plate arranged on one side of the main body plate, and a gate-shaped lintel connecting the main body plate and the node plate, and the inner space of the gate-shaped lintel is arranged opposite to the gap between the main body plate and the node plate; The main body plate and the node plate are provided with through holes at design positions corresponding to the holes on the facade.

3. The template assembly for drilling holes in bolted truss bridge chords according to claim 2, characterized in that: At least one first rib plate is disposed on the top surface of the main body plate.

4. The template assembly for drilling holes in bolted truss bridge chords according to claim 1, characterized in that: The outer contour of the first template matches the outer contour of the facade of the chord.

5. The template assembly for drilling holes in bolted truss bridge chords according to claim 1, characterized in that: The top surface of the first sample plate is provided with at least one second rib plate.

6. The template assembly for drilling holes in a bolted truss bridge chord according to claim 1, characterized in that: The opposite sides of the second template are provided with alignment grooves.

7. The template assembly for drilling holes in bolted truss bridge chords according to claim 1, characterized in that: Long strip-shaped avoidance grooves are arranged on the first panel and the second panel at positions close to the connection points.

8. A method for drilling holes in chords using the template assembly for drilling holes in chords of bolted truss bridges according to any one of claims 1 to 7, characterized in that: The steps include: Providing a chord bar to be drilled, placing the provided chord bar to be drilled on a working surface, and arranging one vertical surface of the chord bar facing upward; Providing a first sample, covering the first sample on the upwardly disposed facade, and fixing the first sample after accurate alignment; Drilling holes on the vertical surface of the chord rod using the first through hole on the first template, and forming a plurality of second positioning holes in each hole group area on the chord rod during the drilling process; removing the first sample; Provide a second template, place the second template at the hole group area corresponding to the facade, and realize positioning through the second positioning holes at the corresponding hole group area, and fix the second template after accurate positioning; Drill all the holes in the corresponding hole group area using the second through holes on the second template, and remove the second template after completion; Flipping the chord rod so that the other vertical surface is facing upward, and repeating the above steps to complete the drilling operation on the other vertical surface; flipping the chord bar so that a flat surface on the chord bar is disposed upward; Provide an end side template, buckle the end side template at the end of the chord, align the first positioning hole on the first panel with the hole drilled on the corresponding facade, fix the end side template, and use the template hole on the second panel to drill the hole on the plane, thereby completing the drilling on the chord.

9. The method for drilling holes for chords using the template assembly for drilling holes for chords of bolted truss bridges as claimed in claim 8, characterized in that: When the other vertical surface of the chord is arranged upward, the side portion of a plane of the chord is located above the side portion corresponding to the vertical surface; When drilling a hole on the other vertical surface of the chord, a lintel template is provided, wherein the lintel template includes a main body plate, a node plate arranged on one side of the main body plate, and a gate-shaped lintel connecting the main body plate and the node plate, wherein the inner space of the gate-shaped lintel is arranged opposite to the gap between the main body plate and the node plate; The lintel template is covered on the vertical surface corresponding to the chord rod, and the gap and internal space on the lintel template are used to accommodate the side of the corresponding plane; Using the perforations on the main plate and the node plate, a plurality of second positioning holes are drilled in the hole group areas of the corresponding facades; Remove the lintel template and provide a second template, place the second template at the hole group area corresponding to the facade, and realize positioning through the second positioning holes at the corresponding hole group area, and fix the second template after accurate positioning; The second through hole on the second template is used to drill all the holes in the corresponding hole group area, thereby completing the drilling operation on the other vertical surface of the chord.

10. The method for drilling holes for chords of bolted truss bridges using the template assembly for drilling holes for chords of bolted truss bridges as claimed in claim 8, characterized in that: When drilling is performed using the first through hole on the first sample plate, the number of second positioning holes drilled and formed in each hole group area is at least three, and the three second positioning holes are not on the same straight line.

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