Three-five-section seedling arch bridge

Abstract

The utility model discloses a three-five-section nursery stock arch bridge, and belongs to the field of models.The nursery stock arch bridge comprises a model base and a nursery stock arch bridge model connected with the model base in a mortise and tenon mode, and the nursery stock arch bridge model comprises a bridge abutment base fixedly installed on the model base and a three-section nursery stock system connected to the bridge abutment base in a mortise and tenon mode; samson post framed bent systems are connected to the two ends of the three-section seedling system on the bridge abutment base in a mortise and tenon mode, a five-section seedling system is connected between the two samson post framed bent systems on the three-section seedling system in a mortise and tenon mode, and a diagonal bridging system is connected between the two samson post framed bent systems on the three-section seedling system and the five-section seedling system in a mortise and tenon mode. The diagonal bridging system is connected with a bracket inclined strut system in a mortise and tenon mode. The nursery stock arch bridge is different from a common three-five-section nursery stock arch bridge model in a single three-section-seedling or five-section-seedling form in composition, the arch bridge structure is convenient to cognize and learn, and compared with gluing and nail fixing, mortise and tenon mounting is more convenient and faster to disassemble and assemble.

Description

Technical Field

[0001] This application relates to the field of model technology, and specifically to a three-five-section seedling arch bridge. Background Art

[0002] The log arch bridge (or Fujian-Zhejiang log arch bridge) is a unique bridge structure in China, and its construction technique has been included in the intangible cultural heritage urgently needed to be protected by UNESCO. The architectural structure of the log arch bridge has a technical threshold in terms of cognition, and past academic interpretations have often been relatively profound. Therefore, it has become a necessary popular science method to use physical models that can be built by hand for display.

[0003] In the prior art, the existing arch bridge models are large, and most of them are common three-section or five-section seedling arch bridge models. There is a lack of arch bridge models that combine three-section and five-section seedlings, which are not convenient for combination and disassembly and are not conducive to learning and understanding such arch bridges.

[0004] Therefore, this application provides a three-five-section seedling arch bridge to solve the above problems. Content of the Utility Model

[0005] This application provides a three-five-section seedling arch bridge, aiming to solve the problems in the prior art proposed in the background art, such as the existing arch bridge models being large, mostly common three-section or five-section seedling arch bridge models, lacking arch bridge models that combine three-section and five-section seedlings, not being convenient for combination and disassembly, and not being conducive to learning and understanding such arch bridges.

[0006] To achieve the above object, this application provides the following technical solution: A three-five-section seedling arch bridge, including a model base and a seedling arch bridge model mortise-and-tenon connected to the model base:

[0007] The seedling arch bridge model includes a bridge abutment base fixedly installed on the model base and a three-section seedling system mortise-and-tenon connected to the bridge abutment base. On both ends of the three-section seedling system on the bridge abutment base, there is a general column bent system mortise-and-tenon connected. Between the two general column bent systems on the three-section seedling system, there is a five-section seedling system mortise-and-tenon connected. Between the two general column bent systems on the three-section seedling system and the five-section seedling system, there is a scissors brace system mortise-and-tenon connected. And on the scissors brace system, there is a corbel diagonal brace system mortise-and-tenon connected. In this way, place the bridge abutment base on the model base, and then successively install the three-section seedling system, the general column bent system, the five-section seedling system, the scissors brace system, and the corbel diagonal brace system by mortise-and-tenon to form a three-five-section seedling arch bridge model different from the common single three-section and five-section forms, which is convenient for cognitive learning of such arch bridge structures. Moreover, mortise-and-tenon installation is more convenient and faster for disassembly and assembly than gluing and nailing.

[0008] Preferably, in order to support the base, the abutment foundation includes two front and rear vertical plates. At both ends of the two front and rear vertical plates, left and right outer vertical plates are installed by mortise and tenon joints. Inside the two front and rear vertical plates, two left and right inner vertical plates are installed by mortise and tenon joints. At the top of the two front and rear vertical plates, between the left and right outer vertical plates and the left and right inner vertical plates, an end top plate is installed by mortise and tenon joints. At the position between the two end top plates on the two front and rear vertical plates, an intermediate top plate is installed by mortise and tenon joints. Between the two ends of the intermediate top plate and the two front and rear vertical plates, inner buckle support plates are installed by mortise and tenon joints. Between the left and right inner vertical plates and the two front and rear vertical plates, horizontal insertion plates are installed by mortise and tenon joints. Insert the horizontal insertion plates into the two front and rear vertical plates from the side, thus completing the assembly of the abutment foundation, which is stable and reliable.

[0009] Preferably, in order to ensure the stability of the base, the three-section seedling system includes a number of inclined seedlings that are installed by mortise and tenon joints with the horizontal insertion plates and are symmetrically arranged. At the end of one end of the inclined seedlings where they are mortise and tenon connected to the horizontal insertion plates, inner cushion seedlings are installed by mortise and tenon joints. On the outer side wall of the inner cushion seedlings, outer cushion seedlings are installed by mortise and tenon joints. The end of the inclined seedlings far from the horizontal insertion plates extends towards the center position above the intermediate top plate and at the end, inner bullhead plates are installed by mortise and tenon joints. On the outer side wall of the inner bullhead plates, outer bullhead plates are installed by mortise and tenon joints. Between the two outer bullhead plates, a number of flat seedlings are installed by mortise and tenon joints. Thereby fixing the abutment foundation, which is more stable and reliable.

[0010] Preferably, in order to press the three-section seedling system, the general column bent system includes two outer general columns that are fitted on the left and right inner vertical plates and press on the inner cushion seedlings. On the opposite surfaces of the two outer general columns, inner general columns are installed by mortise and tenon joints. At a position slightly above the two inner general columns, a crossbeam is installed by mortise and tenon joints. At the bottom of the crossbeam, between the two inner general columns, a number of bent columns are installed by mortise and tenon joints. Improve the stability of the connection between the three-section seedling system and the abutment foundation.

[0011] Preferably, in order to form a three-five-section seedling arch bridge, the five-section seedling system includes upper inclined seedlings that are inserted on one end of the inclined seedlings close to the flat seedlings, and lower inclined seedlings that are abutted head to tail with the upper inclined seedlings and are close to the outer side wall of the bent column. At the end of the lower inclined seedlings close to the bent column, second inner cushion seedlings that are lapped on the inner cushion seedlings are installed by mortise and tenon joints. On the outer side wall of the second inner cushion seedlings, second outer cushion seedlings are installed by mortise and tenon joints. At the end of the upper inclined seedlings close to the lower inclined seedlings, outer lower bullhead plates are installed by mortise and tenon joints. At the end of the lower inclined seedlings close to the upper inclined seedlings, inner lower bullhead plates are installed by mortise and tenon joints. Between the two groups of upper inclined seedlings, upper flat seedlings are lapped on the flat seedlings. At both ends of the upper flat seedlings and at the end of the upper inclined seedlings close to the upper flat seedlings, mutually abutted upper bullhead plates are installed by mortise and tenon joints. Form a three-five-section seedling arch bridge with the three-section seedling system.

[0012] Preferably, in order to provide support, the cross bracing system includes a lower cross brace tenoned and mortised onto the lower bullhead plate on the outer sidewall of the bent column, and an upper cross brace is tenoned and mortised onto the bent column and the upper bullhead plate. Thereby, the five-section seedling system is tightened to improve the structural stability.

[0013] Preferably, in order to assemble the corbel diagonal bracing system, the corbel diagonal bracing system includes an outer bridge deck cross beam arranged above the upper cross brace. An inner bridge deck cross beam is tenoned and mortised onto the inner sidewall of the outer bridge deck cross beam. Two-sided corbel diagonal braces are tenoned and mortised between the outer bridge deck cross beam and the outer general column. An intermediate corbel diagonal brace is tenoned and mortised between the outer bridge deck cross beam and the bent column. A middle card slot that is clamped inside the bent column is tenoned and mortised at one end of the intermediate corbel diagonal brace close to the bent column. A corbel is tenoned and mortised between the inner bridge deck cross beam and the inner lower bullhead plate. Thereby, the cross bracing system is pressed to improve the stability.

[0014] For this seedling arch bridge, place the abutment foundation on the model base, and then sequentially tenon and mortise the three-section seedling system, the general column bent system, the five-section seedling system, the cross bracing system and the corbel diagonal bracing system to form a three-five-section seedling arch bridge model different from the common single three-section and five-section forms, which is convenient for cognitive learning of the structure of this type of arch bridge. Moreover, tenoning and mortising is more convenient and faster for disassembly and assembly than gluing and fixing with nails.

[0015] For this seedling arch bridge, the combination of each mechanism is clear, which is convenient for replacing parts and easy to maintain. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the overall structure of a three-five-section seedling arch bridge;

[0017] Figure 2 It is a schematic diagram of the joint structure of a three-five-section seedling arch bridge;

[0018] Figure 3 It is a schematic diagram of the assembly structure of a three-five-section seedling arch bridge.

[0019] In the figure:

[0020] 1. Model base; 2. Seedling arch bridge model; 21. Abutment base; 211. Front and rear vertical plates; 212. Left and right outer vertical plates; 213. Left and right inner vertical plates; 214. End top plate; 215. Middle top plate; 216. Inner buckle support plate; 217. Horizontal insertion plate; 22. Three-section seedling system; 221. Inclined seedling; 222. Inner cushion seedling; 223. Outer cushion seedling; 224. Inner bull head plate; 225. Outer bull head plate; 226. Flat seedling; 23. General column bent system; 231. Outer general column; 232. Inner general column; 233. Eyebrow beam; 234. Bent column; 24. Five-section seedling system; 241. Upper inclined seedling; 242. Lower inclined seedling; 243. Second inner cushion seedling; 244. Second outer cushion seedling; 245. Outer lower bull head plate; 246. Inner lower bull head plate; 247. Upper flat seedling; 248. Upper bull head plate; 25. Scissor brace system; 251. Lower scissor seedling; 252. Upper scissor seedling; 26. Bull leg diagonal brace system; 261. Outer bridge deck cross beam; 262. Inner bridge deck cross beam; 263. Bull leg diagonal braces on both sides; 264. Middle bull leg diagonal brace; 265. Middle card slot; 266. Bull leg. Detailed implementation manners

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0022] Embodiment 1

[0023] This embodiment provides a three-five-section seedling arch bridge, as Figures 1 - 3 shown. The seedling arch bridge includes a model base 1 and a seedling arch bridge model 2 that is mortise-and-tenon connected to the model base 1:

[0024] The seedling arch bridge model 2 includes an abutment base 21 fixedly installed on the model base 1 and a three-section seedling system 22 that is mortise-and-tenon connected to the abutment base 21. A general column bent system 23 is mortise-and-tenon connected to both ends of the three-section seedling system 22 on the abutment base 21. A five-section seedling system 24 is mortise-and-tenon connected between the two general column bent systems 23 on the three-section seedling system 22. A scissor brace system 25 is mortise-and-tenon connected between the two general column bent systems 23 on the three-section seedling system 22 and the five-section seedling system 24. A bull leg diagonal brace system 26 is mortise-and-tenon connected to the scissor brace system 25.

[0025] During use, place the bridge abutment base 21 on the model base 1, and then successively install the three-section column system 22, general column bent system 23, five-section column system 24, cross bracing system 25 and bracket diagonal bracing system 26 by mortise and tenon joints to form a three-five-section column arch bridge model different from the common single three-section column and five-section column forms, which is convenient for cognitive learning of this type of arch bridge structure. Moreover, the disassembly and assembly by mortise and tenon joints are more convenient and faster than gluing and nailing.

[0026] Specifically, the bridge abutment base 21 includes two front and rear vertical plates 211. At both ends of the two front and rear vertical plates 211, outer left and right vertical plates 212 are installed by mortise and tenon joints. Inside the two front and rear vertical plates 211, two inner left and right vertical plates 213 are installed by mortise and tenon joints. At the top of the two front and rear vertical plates 211, between the outer left and right vertical plates 212 and the inner left and right vertical plates 213, an end top plate 214 is installed by mortise and tenon joints. At the position between the two end top plates 214 on the two front and rear vertical plates 211, a middle top plate 215 is installed by mortise and tenon joints. Between the two ends of the middle top plate 215 and the two front and rear vertical plates 211, an inner buckle bracing plate 216 is installed by mortise and tenon joints. Between the inner left and right vertical plates 213 and the two front and rear vertical plates 211, a horizontal insertion plate 217 is installed by mortise and tenon joints.

[0027] During use, mortise and tenon splice the two outer left and right vertical plates 212 and the two inner left and right vertical plates 213 with the two front and rear vertical plates 211. First, fix the bottom model of the bridge abutment base 21, and then install the two end top plates 214 at the top ends of the two front and rear vertical plates 211 by mortise and tenon joints. Then, mortise and tenon snap the middle top plate 215 onto the two front and rear vertical plates 211 from above, thus propping up the skeleton of the entire bridge abutment base 21. Subsequently, insert the inner buckle bracing plate 216 into the two front and rear vertical plates 211, and then insert the horizontal insertion plate 217 into the two front and rear vertical plates 211 from the side, thereby completing the assembly of the bridge abutment base 21.

[0028] More specifically, the three-section column system 22 includes a number of inclined columns 221 that are installed by mortise and tenon joints with the horizontal insertion plate 217 and are symmetrically arranged. At the end of one end of the inclined column 221 where it is mortise and tenon connected to the horizontal insertion plate 217, an inner cushion column 222 is installed by mortise and tenon joints. On the outer side wall of the inner cushion column 222, an outer cushion column 223 is installed by mortise and tenon joints. The end of the inclined column 221 far from the horizontal insertion plate 217 extends towards the central position above the middle top plate 215 and an inner bracket plate 224 is installed by mortise and tenon joints at the end. On the outer side wall of the inner bracket plate 224, an outer bracket plate 225 is installed by mortise and tenon joints. Between the two outer bracket plates 225, a number of horizontal columns 226 are installed by mortise and tenon joints.

[0029] In use, take out several inclined seedlings 221 and divide them into two groups. Use the inner cushion seedlings 222 to uniformly limit and fix the ends of the several inclined seedlings 221 to make them into a regular row shape. Then, mortise and tenon-mount the outer cushion seedlings 223 onto the inner cushion seedlings 222. Then, take out the flat seedlings 226 and install the inner bullhead plates 224 and the outer bullhead plates 225 at both ends of the flat seedlings 226 and at the ends of the two groups of inclined seedlings 221 to form an arch-like three-section seedling system 22. Subsequently, lap and mortise and tenon-mount the outer cushion seedlings 223 at both ends of the inclined seedlings 221 onto the horizontal insertion plate 217 to complete the assembly of the three-section seedling system 22.

[0030] Further, the general column bent system 23 includes two outer general columns 231 that are fitted on the inner left and right vertical plates 213 and press on the inner cushion seedlings 222. Inner general columns 232 are mortise and tenon-mounted on the opposite surfaces of the two outer general columns 231. A brow beam 233 is mortise and tenon-mounted at a position above the middle between the two inner general columns 232. Several bent columns 234 are mortise and tenon-mounted between the two inner general columns 232 at the bottom of the brow beam 233.

[0031] In use, mortise and tenon-mount the bent columns 234 into the brow beam 233 one by one. Then, install the two inner general columns 232 at both ends of the brow beam 233. Subsequently, mortise and tenon-mount the outer general columns 231 on the outer walls of the inner general columns 232. Then, press the bottom ends of the outer general columns 231 on the inner cushion seedlings 222 and connect them to the inner left and right vertical plates 213 by mortise and tenon, thereby completing the assembly of the general column bent system 23 and improving the stability of the connection between the three-section seedling system 22 and the abutment base 21.

[0032] Even further, the five-section seedling system 24 includes an upper inclined seedling 241 that is inserted on the inclined seedling 221 near one end of the flat seedling 226 and a lower inclined seedling 242 that abuts against the head and tail of the upper inclined seedling 241 and is close to the outer wall of the bent column 234. A second inner cushion seedling 243 that laps on the inner cushion seedling 222 is mortise and tenon-mounted at one end of the lower inclined seedling 242 close to the bent column 234. A second outer cushion seedling 244 is mortise and tenon-mounted on the outer wall of the second inner cushion seedling 243. An outer lower bullhead plate 245 is mortise and tenon-mounted at one end of the upper inclined seedling 241 close to the lower inclined seedling 242. An inner lower bullhead plate 246 is mortise and tenon-mounted at one end of the lower inclined seedling 242 close to the upper inclined seedling 241. An upper flat seedling 247 laps on the flat seedling 226 between the two groups of upper inclined seedlings 241. Upper bullhead plates 248 that are abutted are mortise and tenon-mounted at both ends of the upper flat seedling 247 and at one end of the upper inclined seedling 241 close to the upper flat seedling 247.

[0033] In use, place an upper bull head plate 248 horizontally on the flat seedlings 226, then take out the upper flat seedlings 247 and connect them to the upper bull head plate 248 one by one with mortise and tenon joints. Subsequently, connect another upper bull head plate 248 to the other end of the upper flat seedlings 247 with mortise and tenon joints. Then, take out the upper inclined seedlings 241 and insert them into the inclined seedlings 221 and flat seedlings 226. Install the end of the upper inclined seedlings 241 on the upper bull head plate 248 with mortise and tenon joints. Then, install the outer lower bull head plate 245 and the inner lower bull head plate 246 with mortise and tenon joints at the end of the upper inclined seedlings 241 away from the upper flat seedlings 247. Subsequently, install the lower inclined seedlings 242 with mortise and tenon joints in the direction of the upper inclined seedlings 241 on the inner lower bull head plate 246. Then, install the second inner cushion seedling 243 and the second outer cushion seedling 244 with mortise and tenon joints at the other end of the lower inclined seedlings 242, so that they are placed on the inner cushion seedlings 222 and outer cushion seedlings 223, completing the assembly of the five-section seedling system 24.

[0034] Among them, the cross bracing system 25 includes a lower cross bracing seedling 251 installed with mortise and tenon joints on the outer side wall of the lower bull head plate 245 of the bent column 234, and an upper cross bracing seedling 252 is installed with mortise and tenon joints on the bent column 234 and the upper bull head plate 248.

[0035] In use, connect the lower cross bracing seedling 251 to the bent column 234 and the inner lower bull head plate 246 with mortise and tenon joints, and then connect the upper cross bracing seedling 252 to the bent column 234 and the upper bull head plate 248 on the same side with mortise and tenon joints, completing the assembly of the cross bracing system 25.

[0036] Specifically, the corbel bracing system 26 includes an outer bridge deck cross beam 261 arranged above the upper cross bracing seedling 252. An inner bridge deck cross beam 262 is installed with mortise and tenon joints on the inner side wall of the outer bridge deck cross beam 261. Two-sided corbel braces 263 are installed with mortise and tenon joints between the outer bridge deck cross beam 261 and the outer general column 231. An intermediate corbel brace 264 is installed with mortise and tenon joints between the outer bridge deck cross beam 261 and the bent column 234. An intermediate card slot 265 that is clamped in the bent column 234 is installed with mortise and tenon joints at one end of the intermediate corbel brace 264 close to the bent column 234. A corbel 266 is installed with mortise and tenon joints between the inner bridge deck cross beam 262 and the inner lower bull head plate 246.

[0037] In use, install the two-sided corbel braces 263 with mortise and tenon joints on the outer general column 231. Subsequently, install the intermediate card slot 265 on the intermediate corbel brace 264, and then connect the intermediate card slot 265 to the bent column 234 with mortise and tenon joints. Subsequently, install the outer bridge deck cross beam 261 with mortise and tenon joints at the other end of the two-sided corbel braces 263 and the intermediate corbel brace 264 for fixation. Then, install the inner bridge deck cross beam 262 with mortise and tenon joints on the outer bridge deck cross beam 261. Then, insert the corbel 266 into the inner bridge deck cross beam 262 and the upper bull head plate 248 to complete the support and fixation, completing the assembly of the corbel bracing system 26.

[0038] The above are only the preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application should cover within the protection scope of the present application by making equivalent substitutions or changes according to the technical solution and its concept of the present application.

Claims

1. A three-five-section seedling arch bridge, comprising a model base (1) and a seedling arch bridge model (2) mortise-and-tenon connected to the model base (1), characterized in that: The seedling arch bridge model (2) includes a bridge abutment base (21) fixedly installed on the model base (1) and a three-section seedling system (22) mortise-and-tenon connected to the bridge abutment base (21). On both ends of the three-section seedling system (22) on the bridge abutment base (21), there are mortise-and-tenon connected general column bent systems (23). Between the two general column bent systems (23) on the three-section seedling system (22), there is a five-section seedling system (24) mortise-and-tenon connected. Between the two general column bent systems (23) on the three-section seedling system (22) and the five-section seedling system (24), there is a scissors brace system (25) mortise-and-tenon connected. On the scissors brace system (25), there is a corbel diagonal brace system (26) mortise-and-tenon connected.

2. The three-five-section nursery stock arch bridge according to claim 1, characterized in that: The bridge abutment base (21) includes two front and rear vertical plates (211). At both ends of the two front and rear vertical plates (211), there are mortise-and-tenon installed outer left and right vertical plates (212). Inside the two front and rear vertical plates (211), there are two inner left and right vertical plates (213) mortise-and-tenon installed. At the top of the two front and rear vertical plates (211) between the outer left and right vertical plates (212) and the inner left and right vertical plates (213), there is an end top plate (214) mortise-and-tenon installed. At the position between the two end top plates (214) on the two front and rear vertical plates (211), there is a middle top plate (215) mortise-and-tenon installed. Between the two ends of the middle top plate (215) and the two front and rear vertical plates (211), there is an inner buckle brace plate (216) mortise-and-tenon installed. Between the inner left and right vertical plates (213) and the two front and rear vertical plates (211), there is a horizontal insertion plate (217) mortise-and-tenon installed.

3. A three-five-section nursery stock arch bridge according to claim 2, characterized in that: The three-section seedling system (22) includes a number of inclined seedlings (221) mortise-and-tenon installed with the horizontal insertion plate (217) and arranged symmetrically. At the end of the inclined seedling (221) where it is mortise-and-tenon connected to the horizontal insertion plate (217), there is an inner cushion seedling (222) mortise-and-tenon installed. On the outer side wall of the inner cushion seedling (222), there is an outer cushion seedling (223) mortise-and-tenon installed. The end of the inclined seedling (221) far from the horizontal insertion plate (217) extends towards the center position above the middle top plate (215) and at the end, there is an inner corbel plate (224) mortise-and-tenon installed. On the outer side wall of the inner corbel plate (224), there is an outer corbel plate (225) mortise-and-tenon installed. Between the two outer corbel plates (225), there are a number of flat seedlings (226) mortise-and-tenon installed.

4. The three-five-section nursery stock arch bridge according to claim 3, characterized in that: The general column bent system (23) includes two outer general columns (231) fittingly arranged on the inner left and right vertical plates (213) and pressing on the inner cushion seedlings (222). On the opposite faces of the two outer general columns (231), there are inner general columns (232) mortise-and-tenon installed. At a position slightly above between the two inner general columns (232), there is a brow beam (233) mortise-and-tenon installed. At the bottom of the brow beam (233) between the two inner general columns (232), there are a number of bent columns (234) mortise-and-tenon installed.

5. A three-five-section nursery stock arch bridge according to claim 4, characterized in that: The five-section seedling system (24) includes an upper inclined seedling (241) interspersed at one end of the inclined seedling (221) close to the flat seedling (226), and a lower inclined seedling (242) that abuts against the upper inclined seedling (241) end to end and is close to the outer wall of the bent frame column (234). At one end of the lower inclined seedling (242) close to the bent frame column (234), a second inner cushion seedling (243) lapped on the inner cushion seedling (222) is installed by mortise and tenon. A second outer cushion seedling (244) is installed by mortise and tenon on the outer wall of the second inner cushion seedling (243). At one end of the upper inclined seedling (241) close to the lower inclined seedling (242), an outer lower bullhead plate (245) is installed by mortise and tenon. At one end of the lower inclined seedling (242) close to the upper inclined seedling (241), an inner lower bullhead plate (246) is installed by mortise and tenon. An upper flat seedling (247) is lapped on the flat seedling (226) between the two upper inclined seedlings (241). At both ends of the upper flat seedling (247) and at one end of the upper inclined seedling (241) close to the upper flat seedling (247), upper bullhead plates (248) that abut against each other are installed by mortise and tenon.

6. A three-five-section nursery stock arch bridge according to claim 5, characterized in that: The cross bracing system (25) includes a lower cross bracing seedling (251) installed by mortise and tenon on the lower bullhead plate (245) on the outer wall of the bent frame column (234), and an upper cross bracing seedling (252) installed by mortise and tenon on the bent frame column (234) and the upper bullhead plate (248).

7. A three-five-section seedling arch bridge according to claim 6, characterized in that: The corbel diagonal bracing system (26) includes an outer bridge deck cross beam (261) arranged above the upper cross bracing seedling (252). An inner bridge deck cross beam (262) is installed by mortise and tenon on the inner wall of the outer bridge deck cross beam (261). On the outer bridge deck cross beam (261), two-side corbel diagonal braces (263) are installed by mortise and tenon between it and the outer general column (231). On the outer bridge deck cross beam (261), an intermediate corbel diagonal brace (264) is installed by mortise and tenon between it and the bent frame column (234). At one end of the intermediate corbel diagonal brace (264) close to the bent frame column (234), an intermediate card slot (265) clamped in the bent frame column (234) is installed by mortise and tenon. On the inner bridge deck cross beam (262), a corbel (266) is installed by mortise and tenon between it and the inner lower bullhead plate (246).

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