Steel structure truss for road and bridge engineering and construction and construction process thereof

Abstract

This invention relates to the field of steel structure truss technology, specifically to steel structure trusses and construction techniques used in road and bridge engineering and building construction. The steel structure truss for road and bridge engineering and building construction includes: a first connecting block, a second connecting block, pre-connecting bolts, a fixing groove, a second connecting limiting groove, and a first connecting limiting block. The beneficial effects are: the first connecting limiting block is held in place by a first connecting spring and enters the first connecting limiting groove, thus limiting and fixing the pre-connecting bolts and the first connecting block; and the second connecting limiting groove and the second connecting limiting block cooperate to limit and fix the pre-connecting bolts and the second connecting block, thereby pre-connecting and limiting the first and second connecting blocks, ensuring the flatness when multiple truss bodies are connected. Nuts can be tightened onto the surface of the pre-connecting bolts with one hand, preventing workers from having their hands unloaded when connecting trusses at height, thus avoiding safety hazards.

Description

Technical Field

[0001] This invention relates to the field of steel structure truss technology, specifically to steel structure trusses and construction techniques used in road and bridge engineering and building construction. Background Technology

[0002] A truss is a structure composed of members connected to each other at both ends by hinges. Trusses are planar or spatial structures composed of straight members and generally have triangular units. Truss members mainly bear axial tension or compression, thus making full use of the strength of the material. When the span is large, it can save material compared to solid web beams, reduce self-weight and increase stiffness. The advantages of trusses are that the members mainly bear tension or compression, which can make full use of the material, save material and reduce structural weight.

[0003] Currently, steel trusses are required in road and bridge engineering and building construction, and multiple trusses are connected to form a larger and taller truss according to construction requirements.

[0004] The current trusses require bolts for connection, and it is difficult to ensure the flatness of the trusses during connection, which can cause the trusses to tilt. It takes extra time to fix the trusses. Moreover, when the trusses are stacked on top of each other in the upper floors, one hand is needed to fix the bolts, and the other hand is needed to use a tool to tighten the nuts onto the bolts to connect the trusses. This means that the workers have to leave both hands unattended, which poses a safety hazard. Summary of the Invention

[0005] The purpose of this invention is to provide steel structure trusses and construction techniques for road and bridge engineering and building construction, so as to solve the problem of flatness when connecting trusses.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A steel truss for road and bridge engineering and building construction, comprising:

[0008] The first connecting block is set on one end surface of the truss body and has a U-shaped structure;

[0009] The second connecting block is located on the surface of the truss body at the end away from the first connecting block, and has a "convex" shaped structure.

[0010] Pre-connecting bolts are installed, passing through the first and second connecting blocks;

[0011] A fixing groove is formed on the surface of the pre-connecting bolt nut end;

[0012] The second connecting and limiting groove is formed on the end surface of the pre-connecting bolt thread; and

[0013] The first connection limit block is arranged on the surface of the screw end of the pre-connection bolt.

[0014] Preferably, the cross-section of the fixed groove is in a "C" - shaped structure. Inside the fixed groove, there are a first movable block and a first linkage spring. One end of the first linkage spring is connected to the innermost surface of the fixed groove, and the other end is connected to the first movable block. And at the end of the first movable block away from the first linkage spring, there is a limit handle. The limit handle is in a semi - circular ring structure and is always in a stretched state.

[0015] Preferably, on the inner wall of the first connection block, there is a first connection limit groove, and on the surface of the screw end of the pre - connection bolt, there is a first connection abutment groove. Both the cross - sections of the first connection limit groove and the first connection abutment groove are in a "C" - shaped structure. And inside the first connection abutment groove, there is a first connection limit block and a first connection abutment spring. One end of the first connection abutment spring is connected to the innermost surface of the first connection abutment groove, and the other end is connected to the first connection limit block. And the first connection abutment spring is always in a compressed state.

[0016] Preferably, there is a traction rope inside the fixed groove. One end of the traction rope is connected to the first movable block, and the other end passes through the pre - connection bolt and is connected to the first connection limit block. And the first linkage spring is sleeved outside the traction rope, and the first connection abutment spring is sleeved outside the traction rope.

[0017] [[ID=第十二]]Preferably, on the outer end of the inner wall of the fixed groove, there is a limit groove. On the surface of the first movable block, there is a rotating shaft, and the rotating shaft is located inside the limit groove. And there are two groups of both the rotating shaft and the limit groove. The included angle between the two groups of rotating shafts is 180 degrees, and the included angle between the rotating shaft and the limit handle is 90 degrees. <你提供的原始文本中此处ID=13对应的内容有误,按照翻译要求,我将其纠正为“第十二”后进行翻译,若实际需求与这不同,请告知。

[0018] Preferably, the limit groove includes a first limit groove, a rotating limit groove, and a second limit groove. The first limit groove is opened at the upper and lower ends of the inner wall of the fixed groove. One end of the rotating limit groove is connected to the first limit groove, and the other end is connected to the second limit groove. And the rotating limit groove is in an arc - shaped structure, and the arc length angle is 90 degrees. The first limit groove and the second limit groove are arranged in parallel, and the length of the second limit groove is greater than the length of the first limit groove. And both the first limit groove and the second limit groove are on the surface of the rotating limit groove close to the first linkage spring.

[0019] Preferably, on the nut end of the pre - connection bolt, there are multiple guide insertion rods. The guide insertion rods are arranged in parallel with the screw end of the pre - connection bolt and are distributed in a circular pattern with the axis line of the screw end of the pre - connection bolt as the center. On the surface of the second connection block, there is a linkage groove. The cross - section of the linkage groove is in a "C" - shaped structure, and the guide insertion rods penetrate through the first connection block and extend into the inside of the linkage groove.

[0020] Preferably, a second linkage spring and a second movable block are arranged inside the linkage groove. One end of the second linkage spring is connected to the innermost surface of the linkage groove, and the other end is connected to the second movable block. A second connection holding groove is formed in the inner wall of the second connection block, and the cross-section of the second connection holding groove is in a "C" shape. A second connection limiting block and a second connection holding spring are arranged inside the second connection holding groove. One end of the second connection holding spring is connected to the innermost surface of the second connection holding groove, and the other end is connected to the second connection limiting block. And the second linkage spring is always in a compressed state, and the elasticity of the second linkage spring is greater than that of the second connection holding spring.

[0021] Preferably, a linkage inclined groove is formed in the middle of the surface of the second connection limiting block near one end of the second connection holding spring, and the linkage inclined groove is arranged towards the second linkage spring. And a linkage rod is arranged inside the linkage groove. One end of the linkage rod is connected to the second movable block, and the other end passes through the second connection block and extends into the second connection holding groove.

[0022] The construction technology of a steel structure truss for road and bridge engineering and building construction includes the following steps:

[0023] Alignment: Align the first and last ends of two groups of truss bodies, so that the second connection block of one group of truss bodies is inserted into the first connection block of the other group of truss bodies; [[ID=ll]]

[0024] Pre-connection: Pass a pre-connection bolt through the first connection block and the second connection block. First, pass a guiding insertion rod through the first connection block and insert it into the linkage groove. At this time, the guiding insertion rod holds the second movable block and moves it towards the second linkage spring. The movement of the second movable block带动 the linkage rod to move towards the second connection holding groove. And the linkage rod cooperates with the linkage inclined groove to press the second connection limiting block away from the second connection holding spring, so that the second connection limiting block enters the second connection limiting groove. At this time, the rotating shaft is located in the first limiting groove, and the traction rope is tightened to pull the first connection limiting block into the first connection holding groove. Pull the first movable block outwards through the limiting handle, then带动 the rotating shaft to enter the rotating limiting groove from the first limiting groove. Rotate the first movable block clockwise by 90 degrees through the limiting handle, and then release the limiting handle. Then the stretched first linkage spring带动 the first movable block to move towards the first linkage spring, so that the rotating shaft enters the second limiting groove from the rotating limiting groove, thereby relaxing the traction rope, so that the first connection holding spring holds the first connection limiting block and enters the first connection limiting groove to limit and fix the pre-connection bolt and the first connection block, and limit and fix the pre-connection bolt and the second connection block through the cooperation of the second connection limiting groove and the second connection limiting block, so as to perform pre-connection limiting on the first connection block and the second connection block;

[0025] Connection and fixation: The nut can be screwed onto the surface of the pre-connection bolt with one hand, so as to fix the connection between the first connection block and the second connection block.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] This invention involves passing a pre-connecting bolt through a first connecting block and a second connecting block. First, a guide rod is inserted through the first connecting block and into the connecting groove. At this time, the guide rod pushes the second movable block towards the second connecting spring. The movement of the second movable block causes the connecting rod to move towards the second connecting support groove. The connecting rod, in conjunction with the connecting inclined groove, presses the second connecting limit block away from the second connecting support spring, causing the second connecting limit block to enter the second connecting limit groove. At this point, the rotating shaft is located inside the first limit groove, and the traction rope is taut, pulling the first connecting limit block into the first connecting support groove. Pulling the first movable block outward using the limit handle causes the rotating shaft to move from the first limit groove into the rotation limit groove. Finally, the first movable block is moved clockwise using the limit handle. When the needle is rotated 90 degrees and the limit handle is released, the first linkage spring in the stretched state drives the first movable block to move toward the first linkage spring, causing the rotating shaft to enter the second limit groove from the rotation limit groove. This loosens the traction rope, allowing the first connecting support spring to push the first connecting limit block into the first connecting limit groove to limit and fix the pre-connecting bolt and the first connecting block. Furthermore, the second connecting limit groove and the second connecting limit block cooperate to limit and fix the pre-connecting bolt and the second connecting block, thus pre-connecting and limiting the first connecting block and the second connecting block. This ensures the flatness of the multiple truss bodies when connected. The nut can be tightened onto the surface of the pre-connecting bolt with one hand, preventing workers from having their hands free when connecting trusses at height, which could cause safety hazards. Attached Figure Description

[0028] Figure 1 This is a front-view three-dimensional structural schematic diagram of the present invention;

[0029] Figure 2 for Figure 1 An enlarged schematic diagram of the structure at point A;

[0030] Figure 3 This is a partial cross-sectional three-dimensional structural diagram of the pre-connecting bolts and the first connecting block;

[0031] Figure 4 A partial sectional view of the pre-connected bolts;

[0032] Figure 5 This is a three-dimensional structural diagram of the pre-connecting bolts and the first connecting block;

[0033] Figure 6 This is a partial cross-sectional three-dimensional structural diagram of the pre-connecting bolts and the second connecting block;

[0034] Figure 7 This is a three-dimensional structural diagram of the pre-connecting bolts and the second connecting block;

[0035] Figure 8 This is a three-dimensional structural diagram of the pre-connected bolts.

[0036] In the diagram: Truss body 1, First connecting block 2, Second connecting block 3, Pre-connecting bolt 4, Limiting groove 5, First limiting groove 501, Rotation limiting groove 502, Second limiting groove 503, Limiting handle 6, First movable block 7, Fixed groove 8, First linkage spring 9, Traction rope 10, First connecting limiting groove 11, First connecting limiting block 12, First connecting top holding groove 13, First connecting top holding spring 14, Rotating shaft 15, Guide rod 16, Second movable block 17, Second linkage spring 18, Linkage groove 19, Linkage rod 20, Second connecting top holding groove 21, Second connecting top holding spring 22, Second connecting limiting block 23, Linkage inclined groove 24, Second connecting limiting groove 25. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] In the description of this invention, it should be noted that the terms "center," "middle," "upper," "lower," "left," "right," "inner," "outer," "top," "bottom," "side," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "a," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] For the purposes of simplicity and illustration, the principles of the embodiments are mainly described by reference to examples. In the following description, many specific details are set forth in order to provide a thorough understanding of the embodiments. It is apparent, however, that the embodiments may not be limited to these specific details in practice. In some instances, well-known methods and structures have not been described in detail so as not to unnecessarily obscure the understanding of these embodiments. Additionally, all embodiments may be used in combination with each other.

[0041] Please refer to Figures 1 to 8 , the present invention provides a technical solution:

[0042] A steel structure truss for road and bridge engineering and building construction, the steel structure truss for road and bridge engineering and building construction includes:

[0043] A first connecting block 2, disposed on one end surface of the truss body 1 and having a "concave" shape structure;

[0044] A second connecting block 3, disposed on the end surface of the truss body 1 away from the first connecting block 2 and having a "convex" shape structure;

[0045] A pre-connecting bolt 4, passing through the first connecting block 2 and the second connecting block 3;

[0046] A fixing groove 8, opened on the nut end surface of the pre-connecting bolt 4;

[0047] A second connecting limiting groove 25, opened on the screw end surface of the pre-connecting bolt 4; and

[0048] A first connecting limiting block 12, disposed on the screw end surface of the pre-connecting bolt 4.

[0049] Preferably, the cross-section of the fixing groove 8 has a "C" shape structure, and a first movable block 7 and a first linkage spring 9 are disposed inside the fixing groove 8. One end of the first linkage spring 9 is connected to the innermost surface of the fixing groove 8, and the other end is connected to the first movable block 7. A limiting handle 6 is disposed at the end of the first movable block away from the first linkage spring 9. The limiting handle 6 has a semi-circular ring structure and is always in a stretched state.

[0050] Preferably, a first connecting limiting groove 11 is opened on the inner wall of the first connecting block 2, and a first connecting holding groove 13 is opened on the screw end surface of the pre-connecting bolt 4. The cross-sections of both the first connecting limiting groove 11 and the first connecting holding groove 13 have a "C" shape structure. A first connecting limiting block 12 and a first connecting holding spring 14 are disposed inside the first connecting holding groove 13. One end of the first connecting holding spring 14 is connected to the innermost surface of the first connecting holding groove 13, and the other end is connected to the first connecting limiting block 12. The first connecting holding spring 14 is always in a compressed state.

[0051] Preferably, a towing rope 10 is arranged inside the fixing groove 8. One end of the towing rope 10 is connected to the first movable block 7, and the other end passes through the pre-connection bolt 4 and is connected to the first connection limiting block 12. The first linkage spring 9 is sleeved outside the towing rope 10, and the first connection abutting spring 14 is sleeved outside the towing rope 10.

[0052] Preferably, a limiting groove 5 is arranged at the outer end of the inner wall of the fixing groove 8. A rotating shaft 15 is arranged on the surface of the first movable block 7, and the rotating shaft 15 is located inside the limiting groove 5. Both the rotating shaft 15 and the limiting groove 5 are provided with two groups. The included angle between the two groups of rotating shafts 15 is 180 degrees, and the included angle between the rotating shaft 15 and the limiting handle 6 is 90 degrees.

[0053] Preferably, the limiting groove 5 includes a first limiting groove 501, a rotating limiting groove 502 and a second limiting groove 503. The first limiting groove 501 is opened at the upper and lower ends of the inner wall of the fixing groove 8. One end of the rotating limiting groove 502 is connected to the first limiting groove 501, and the other end is connected to the second limiting groove 503. The rotating limiting groove 502 is of an arc-shaped structure, and the arc length angle is 90 degrees. The first limiting groove 501 and the second limiting groove 503 are arranged in parallel, and the length of the second limiting groove 503 is greater than the length of the first limiting groove 501. Both the first limiting groove 501 and the second limiting groove 503 are located on the surface of the rotating limiting groove 502 close to the first linkage spring 9.

[0054] Preferably, a guiding insertion rod 16 is arranged at the nut end of the pre-connection bolt 4. The guiding insertion rod 16 is provided with multiple groups, and is arranged in parallel with the screw rod end of the pre-connection bolt 4 and distributed in a circular shape with the axis line of the screw rod end of the pre-connection bolt 4 as the center. A linkage groove 19 is opened on the surface of the second connection block 3. The cross-section of the linkage groove 19 is of a "匚" - shaped structure, and the guiding insertion rod 16 penetrates through the first connection block 2 and extends into the linkage groove 19.

[0055] Preferably, a second linkage spring 18 and a second movable block 17 are arranged inside the linkage groove 19. One end of the second linkage spring 18 is connected to the innermost surface of the linkage groove 19, and the other end is connected to the second movable block 17. A second connection abutting groove 21 is opened on the inner wall of the second connection block 3. The cross-section of the second connection abutting groove 21 is of a "匚" - shaped structure. A second connection limiting block 23 and a second connection abutting spring 22 are arranged inside the second connection abutting groove 21. One end of the second connection abutting spring 22 is connected to the innermost surface of the second connection abutting groove 21, and the other end is connected to the second connection limiting block 23. The second linkage spring 18 is always in a compressed state, and the elasticity of the second linkage spring 18 is greater than the elasticity of the second connection abutting spring 22.

[0056] Preferably, the second connecting limiting block 23 has a connecting groove 24 centered on one end surface near the second connecting top holding spring 22, and the connecting groove 24 is oriented toward the second connecting spring 18. A connecting rod 20 is provided inside the connecting groove 19. One end of the connecting rod 20 is connected to the second movable block 17, and the other end passes through the second connecting block 3 and extends into the second connecting top holding groove 21.

[0057] The construction process for steel trusses used in road and bridge engineering and building construction includes the following steps:

[0058] Alignment: Align the first and second ends of the two sets of truss bodies 1 so that the second connecting block 3 of one set of truss bodies 1 is inserted into the first connecting block 2 of the other set of truss bodies 1.

[0059] Pre-connection: By passing the pre-connection bolt 4 through the first connecting block 2 and the second connecting block 3, the guide rod 16 is first passed through the first connecting block 2 and inserted into the linkage groove 19. At this time, the guide rod 16 pushes the second movable block 17 towards the second linkage spring 18. The movement of the second movable block 17 drives the linkage rod 20 towards the second connecting support groove 21. The linkage rod 20 cooperates with the linkage inclined groove 24 to press the second connecting limit block 23 away from the second connecting support spring 22, so that the second connecting limit block 23 enters the second connecting limit groove 25. At this time, the rotating shaft 15 is located inside the first limit groove 501, and the traction rope 10 is taut, pulling the first connecting limit block 12 into the first connecting support groove 13. By pulling the first movable block 7 outward through the limit handle 6, the belt... The rotating shaft 15 enters the rotation limiting groove 502 from the first limiting groove 501. The first movable block 7 is rotated 90 degrees clockwise by the limiting handle 6. Then the limiting handle 6 is released, and the first connecting spring 9 in the stretched state drives the first movable block 7 to move toward the first connecting spring 9, so that the rotating shaft 15 enters the second limiting groove 503 from the rotation limiting groove 502. This relaxes the traction rope 10, so that the first connecting holding spring 14 holds the first connecting limiting block 12 into the first connecting limiting groove 11 to limit and fix the pre-connecting bolt 4 and the first connecting block 2. The second connecting limiting groove 25 and the second connecting limiting block 23 cooperate to limit and fix the pre-connecting bolt 4 and the second connecting block 3, thereby performing pre-connection limiting on the first connecting block 2 and the second connecting block 3.

[0060] Connection and fixing: The nut can be screwed onto the surface of the pre-connecting bolt 4 with one hand, thereby fixing the connection between the first connecting block 2 and the second connecting block 3.

[0061] By passing the pre-connecting bolt 4 through the first connecting block 2 and the second connecting block 3, the guide rod 16 is first passed through the first connecting block 2 and inserted into the linkage groove 19. At this time, the guide rod 16 pushes the second movable block 17 towards the second linkage spring 18. The movement of the second movable block 17 drives the linkage rod 20 towards the second connecting support groove 21. The linkage rod 20 cooperates with the linkage inclined groove 24 to press the second connecting limit block 23 away from the second connecting support spring 22, so that the second connecting limit block 23 enters the second connecting limit groove 25. At this time, the rotating shaft 15 is located inside the first limit groove 501, and the traction rope 10 is taut, pulling the first connecting limit block 12 into the first connecting support groove 13. By pulling the first movable block 7 outward through the limit handle 6, the rotating shaft 15 is driven from the first limit groove 501 into the rotation limit groove 502. 6. Rotate the first movable block 7 clockwise by 90 degrees, and then release the limit handle 6. The first linkage spring 9 in the stretched state will drive the first movable block 7 to move toward the first linkage spring 9, so that the rotating shaft 15 enters the second limit groove 503 from the rotation limit groove 502, thereby loosening the traction rope 10. This allows the first connecting top holding spring 14 to hold the first connecting limit block 12 into the first connecting limit groove 11 to limit and fix the pre-connecting bolt 4 and the first connecting block 2. Furthermore, the second connecting limit groove 25 and the second connecting limit block 23 cooperate to limit and fix the pre-connecting bolt 4 and the second connecting block 3, thereby pre-connecting and limiting the first connecting block 2 and the second connecting block 3. This ensures the flatness of the multiple sets of truss bodies 1 when connected. The nut can be screwed onto the surface of the pre-connecting bolt 4 with one hand, preventing the safety hazard caused by workers' hands being in the air when connecting trusses at high altitudes.

[0062] Although the illustrative specific embodiments of this application have been described above to enable those skilled in the art to understand this application, this application is not limited to the scope of the specific embodiments. For those skilled in the art, all applications utilizing the concept of this application are protected as long as various variations are within the spirit and scope of this application as defined and determined by the appended claims.

Claims

1. A steel truss structure used in road and bridge engineering and building construction, characterized in that: The steel structure truss for road and bridge engineering and building construction includes: A first connection block (2), arranged on the surface of one end of the truss body (1) and having a "concave" structure; A second connection block (3), arranged on the surface of the end of the truss body (1) far from the first connection block (2) and having a "convex" structure; A pre-connection bolt (4), arranged through the first connection block (2) and the second connection block (3); A fixing groove (8), opened on the surface of the nut end of the pre-connection bolt (4); A second connection limiting groove (25), opened on the surface of the screw end of the pre-connection bolt (4); and A first connection limiting block (12), arranged on the surface of the screw end of the pre-connection bolt (4); A guiding insertion rod (16) is arranged at the nut end of the pre-connection bolt (4), and multiple groups of guiding insertion rods (16) are arranged, which are parallel to the screw end of the pre-connection bolt (4) and are distributed in a circular shape with the axis line of the screw end of the pre-connection bolt (4) as the center. A linkage groove (19) is opened on the surface of the second connection block (3), and the cross-section of the linkage groove (19) has a "C" - shaped structure, and the guiding insertion rod (16) penetrates through the first connection block (2) and extends into the interior of the linkage groove (19). A second linkage spring (18) and a second movable block (17) are arranged inside the linkage groove (19). One end of the second linkage spring (18) is connected to the innermost surface of the linkage groove (19), and the other end is connected to the second movable block (17). A second connection holding groove (21) is opened on the inner wall of the second connection block (3), and the cross-section of the second connection holding groove (21) has a "C" - shaped structure. A second connection limiting block (23) and a second connection holding spring (22) are arranged inside the second connection holding groove (21). One end of the second connection holding spring (22) is connected to the innermost surface of the second connection holding groove (21), and the other end is connected to the second connection limiting block (23). And the second linkage spring (18) is always in a compressed state, and the elasticity of the second linkage spring (18) is greater than the elasticity of the second connection holding spring (22). A linkage inclined groove (24) is opened in the middle of the surface of the second connection limiting block (23) close to the second connection holding spring (22), and the linkage inclined groove (24) faces the second linkage spring (18). And a linkage rod (20) is arranged inside the linkage groove (19). One end of the linkage rod (20) is connected to the second movable block (17), and the other end passes through the second connection block (3) and extends into the second connection holding groove (21).

2. The steel structure truss for road and bridge engineering and building construction according to claim 1, characterized in that: The cross-section of the fixing groove (8) has a "C" - shaped structure. A first movable block (7) and a first linkage spring (9) are arranged inside the fixing groove (8). One end of the first linkage spring (9) is connected to the innermost surface of the fixing groove (8), and the other end is connected to the first movable block (7). And a limiting handle (6) is arranged at the end of the first movable block (7) far from the first linkage spring (9). The limiting handle (6) has a semi - circular ring structure, and the limiting handle (6) is always in a stretched state.

3. The steel structure truss for road and bridge engineering and building construction according to claim 2, characterized in that: The inner wall of the first connection block (2) is provided with a first connection limit groove (11). The surface of the screw end of the pre-connection bolt (4) is provided with a first connection abutting groove (13). The cross-sections of the first connection limit groove (11) and the first connection abutting groove (13) are both in a "C" - shaped structure. Inside the first connection abutting groove (13), there is a first connection limit block (12) and a first connection abutting spring (14). One end of the first connection abutting spring (14) is connected to the innermost surface of the first connection abutting groove (13), and the other end is connected to the first connection limit block (12). And the first connection abutting spring (14) is always in a compressed state.

4. The steel structure truss for road and bridge engineering and building construction according to claim 3, characterized in that: Inside the fixed groove (8), there is a traction rope (10). One end of the traction rope (10) is connected to the first movable block (7), and the other end passes through the pre-connection bolt (4) and is connected to the first connection limit block (12). And the first linkage spring (9) is sleeved outside the traction rope (10), and the first connection abutting spring (14) is sleeved outside the traction rope (10).

5. The steel structure truss for road and bridge engineering and building construction according to claim 4, characterized in that: The outer end of the inner wall of the fixed groove (8) is provided with a limit groove (5). The surface of the first movable block (7) is provided with a rotating shaft (15), and the rotating shaft (15) is located inside the limit groove (5). And both the rotating shaft (15) and the limit groove (5) are provided with two groups. The included angle between the two groups of rotating shafts (15) is 180 degrees, and the included angle between the rotating shaft (15) and the limit handle (6) is 90 degrees.

6. The steel structure truss for road and bridge engineering and building construction according to claim 5, characterized in that: The limit groove (5) includes a first limit groove (501), a rotating limit groove (502), and a second limit groove (503). The first limit groove (501) is opened at the upper and lower ends of the inner wall of the fixed groove (8). One end of the rotating limit groove (502) is connected to the first limit groove (501), and the other end is connected to the second limit groove (503). And the rotating limit groove (502) is in an arc-shaped structure, and the arc length angle is 90 degrees. The first limit groove (501) and the second limit groove (503) are arranged in parallel. And the length of the second limit groove (503) is greater than the length of the first limit groove (501). And both the first limit groove (501) and the second limit groove (503) are located on the surface of the rotating limit groove (502) close to the first linkage spring (9).

7. The construction process for steel structure trusses used in road and bridge engineering and building construction according to any one of claims 1-6, characterized in that: It includes the following steps: Alignment: Align the first and last ends of the two truss bodies (1) so that the second connection block (3) of one truss body (1) is inserted into the first connection block (2) of the other truss body (1). Pre-connection: By passing the pre-connection bolt (4) through the first connecting block (2) and the second connecting block (3), the guide rod (16) is first passed through the first connecting block (2) and inserted into the linkage groove (19). At this time, the guide rod (16) pushes the second movable block (17) towards the second linkage spring (18). The movement of the second movable block (17) drives the linkage rod (20) towards the second connecting support groove (21). The linkage rod (20) cooperates with the linkage inclined groove (24) to press the second connecting limit block (23) away from the second connecting support spring (22), so that the second connecting limit block (23) enters the second connecting limit groove (25). At this time, the rotating shaft (15) is located inside the first limit groove (501), and the traction rope (10) is tightened to pull the first connecting limit block (12) into the first connecting support groove (13). The first movable block (7) is pulled outward by the limit handle (6). Drive the rotating shaft (15) from the first limiting groove (501) into the rotation limiting groove (502). Rotate the first movable block (7) clockwise by the limiting handle (6) and then release the limiting handle (6). The first connecting spring (9) in the tension state drives the first movable block (7) to move toward the first connecting spring (9), so that the rotating shaft (15) enters the second limiting groove (503) from the rotation limiting groove (502), thereby relaxing the traction rope (10). The first connecting top holding spring (14) holds the first connecting limiting block (12) into the first connecting limiting groove (11) to limit and fix the pre-connecting bolt (4) and the first connecting block (2). And through the cooperation of the second connecting limiting groove (25) and the second connecting limiting block (23), the pre-connecting bolt (4) and the second connecting block (3) are limited and fixed, thereby pre-connecting the first connecting block (2) and the second connecting block (3). Connection and fixing: The nut can be screwed onto the surface of the pre-connecting bolt (4) with one hand, thereby fixing the connection between the first connecting block (2) and the second connecting block (3).

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