Steel structure truss supporting system for constructional engineering

Abstract

The invention relates to the technical field of building construction, and discloses a steel structure truss supporting system for constructional engineering, which comprises main beams, secondary beams, stand columns and inclined struts, the main beams adopt H-shaped steel trusses, the two ends of each main beam are respectively and fixedly connected with a bracket I, each main beam comprises two main rods and a plurality of supporting rods, and splicing assemblies are mounted at the opposite ends of the two adjacent main beams; and one end of the limiting rod penetrates through the connecting cylinder, a limiting layer is fixedly connected to the center of the inner wall of the side cylinder body, and the limiting grooves are formed in the two ends of the main rod correspondingly. The installation speed and the construction efficiency of the steel structure truss supporting system are remarkably improved, the construction period is shortened, the labor cost is reduced, through reasonable structural design and high-quality material selection, the stability and the safety of the system are enhanced, the service life is prolonged, good reusability and environment friendliness are achieved, and the method is suitable for popularization and application. And resource saving and environmental protection are facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, in particular to a steel structure truss support system for a building project. Background Art

[0002] At present, steel structure truss support systems are widely used in construction projects. These systems are mainly used to improve the overall stability of buildings, especially in the construction of high-rise buildings and large bridges. Existing steel structure truss support systems are usually composed of multiple steel components, which are connected by welding or bolts to form a stable structural frame. With the rapid development of the construction industry, the requirements for steel structure truss support systems are getting higher and higher. They not only need to have good load-bearing capacity and wind and earthquake resistance, but also need to be easy to install and disassemble quickly to improve construction efficiency and safety.

[0003] Existing steel structure truss support systems usually adopt the following solutions: Solution 1: Traditional welded steel structure truss support system. The advantages of this solution are stable structure and not easy to deform after long-term use. However, the welding method leads to long on-site construction time and high labor intensity, and it is easy to damage the steel during dismantling, which is not conducive to recycling and reuse; Solution 2: Bolted steel structure truss support system. The advantages of this solution are fast installation speed, easy adjustment and maintenance, but the bolt connection is easy to loosen, especially long-term use under severe weather conditions, which may reduce the stability of the overall structure; Solution 3: Modular design steel structure truss support system. This solution adopts standardized prefabricated components, and on-site assembly is simple and fast. However, since the connection between each module depends on the specific node design, once a node has a problem, the reliability of the entire system will be affected. In addition, due to the long span of the steel structure truss, a large number of bolts are required to fix the adjacent steel rods. The fixed truss is troublesome to remove, and the height of the two ends is easily inconsistent during installation, which affects the subsequent construction and installation. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides a steel structure truss support system for construction projects, which solves the problem that the steel structure truss has a long span and is troublesome to remove after being fixed, and the height inconsistency at both ends is easy to occur during installation.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a steel structure truss support system for a construction project, including a main beam, a secondary beam, a column and a diagonal brace, the main beam adopts an H-shaped steel truss, and the two ends of the main beam are respectively fixedly connected with a bracket, the main beam includes two main rods and a plurality of support rods, and a splicing assembly is installed at the opposite end of the two adjacent main beams, the splicing assembly includes a central cylinder, two side cylinders and a plurality of limit grooves, the outer wall of the central cylinder and the outer walls of the two side cylinders are respectively fixedly connected with two connecting cylinders, the two ends of the central cylinder are respectively threaded with a lead screw, one end of the lead screw located inside the central cylinder is rotatably connected to a rotating disk, the outer wall of the rotating disk is rotatably connected to two sets of connecting rods through an axis, the other end of the connecting rod is rotatably connected to a limiting rod through an axis, one end of the limiting rod passes through the connecting cylinder, and a limiting layer is fixedly connected to the center of the inner wall of the side cylinder, and the limit grooves are respectively opened at the two ends of the main rod.

[0006] Preferably, one end of the lead screw passes through the bracket one, the outer wall of the lead screw is slidably connected to a rotating hand wheel, and the outer side wall of the rotating hand wheel is rotatably connected to one end of the central cylinder.

[0007] Preferably, the outer walls of the central cylinder and the side cylinder are fixedly connected with bracket 2, bracket 1 and bracket 2 are configured as circular, square or triangular, and two sets of moving wheels are fixedly provided on the lower surfaces of bracket 1 and bracket 2 respectively.

[0008] Preferably, the splicing assembly also includes a sliding frame, two support wheels are fixedly provided on the lower surface of the sliding frame, the outer wall of the bracket one protrudes outward to form a protrusion layer, the protrusion layer is located on the lower side of the screw, the inner wall of the sliding frame is slidably connected to the outer wall of the protrusion layer, and the inner top wall of the sliding frame is fixedly connected with an anti-loosening pin.

[0009] Preferably, an anti-loosening groove is provided on the upper surface of the lead screw, a spring member is fixedly connected to the inner bottom wall of the sliding frame, and the top end of the spring member is fixedly connected to the lower surface of the raised layer.

[0010] Preferably, bases are respectively installed on the lower sides of both ends of the main rod, and the bases are fixedly connected to the top of the column by bolts. Two sets of telescopic support tubes are fixedly connected to the upper surface of the base, and the other end of the telescopic support tube is fixedly connected to a pillow plate. The outer wall of the telescopic support tube is fixedly connected to a mounting seat, and an adjusting threaded column is threadedly connected at the center of the mounting seat, and the top of the adjusting threaded column is rotatably connected to the lower surface of the pillow plate.

[0011] Preferably, two L-shaped limiting members are fixedly connected to the upper surface of the pillow plate, a placement groove is provided on the upper surface of the limiting member, and an L-shaped installation groove is provided on the side wall of the limiting member.

[0012] Preferably, a sliding member is installed on one side of the pillow plate, the bottom end of the sliding member is fixedly connected to the upper surface of the pillow plate, the upper surface of the sliding member is slidably connected to a slider, the upper surface of the slider is rotatably connected to a locking seat via an axis, a slot is provided on the surface of the locking seat, and the outer wall of the locking seat protrudes outward to form an L-shaped locking protrusion.

[0013] Preferably, transverse locking holes are respectively opened on the lower surfaces of both ends of the main rod, and spring telescopic locking columns are inserted into the transverse locking holes, and the bottom ends of the spring telescopic locking columns are fixedly connected to the upper surface of the pillow plate.

[0014] The method for erecting the steel structure truss of the construction project includes the following steps: S1. Measure and mark the position of the columns to ensure that the spacing between each column meets the design requirements; S2. Dig foundation holes with a depth of not less than 500mm and a width of not less than 300mm; S3. Place the columns in the holes, correct their verticality, and then pour the holes with concrete to firmly fix the columns; S4. After the concrete solidifies, use expansion bolts to fix the column base to the foundation; S5. Lift the main beam to the top of the column and fix the main beam to the column with high-strength bolts; S6. Check whether the connection between the main beam and the column is tight, and tighten it again if necessary; S7. Weld the secondary beam under the main beam to ensure that the welding points are evenly distributed and the welding quality is good; S8. Weld the diagonal braces to the main beam and columns to strengthen the rigidity of the overall structure; S9. Comprehensively check all connection parts and complete the installation after confirmation.

[0015] Working principle: When building a steel structure truss, first splice the main rods, and insert the main rods of the main beams to be spliced ​​into the side cylinders from both sides until they hit the limit layer, then turn the rotary handwheel, the rotating handwheel drives the lead screw to rotate, the lead screw drives the rotating disk to move toward the inside of the center cylinder, the movement of the rotating disk drives the connecting rod to rotate, the rotation of the connecting rod pushes the limit rod to move outward until it is inserted into the inside of the limit groove, thereby locking the main rod, realizing the rapid splicing and fixation of the side cylinder and the main rod, and by rotating the rotary handwheel in the opposite direction, the limit rod can be driven to exit the limit groove, so that the main rod can be moved out of the side cylinder, realizing the rapid disassembly and assembly of the main rod, which is convenient for construction personnel to assemble or disassemble the main rod.

[0016] The moving wheels make it convenient for construction workers to move the main beam for splicing operations. When the main pole is assembled on the ground, the supporting wheels are used to push the sliding frame up against the ground, thereby raising the anti-loosening pin to facilitate the screw to pass through the bracket. When the main pole is installed in the air, the sliding frame slides downward through the elastic force of the spring part, so that the anti-loosening pin is tightly inserted into the anti-loosening groove on the upper surface of the screw below, thereby achieving the effect of automatically locking the screw, thereby preventing the screw from accidentally loosening and affecting the stability of the main pole splicing.

[0017] After the main pole is spliced, fix the base to the top of the column, then hoist the main pole, and install the two main poles below the spliced ​​main pole in the placement grooves respectively. By horizontally moving the main pole as a whole, the spring telescopic locking column is aligned with the transverse locking hole, and the spring telescopic locking column is extended and inserted into the transverse locking hole to lock the main pole as a whole laterally. Then, the pillow plate is driven upward by rotating the lead screw to adjust the height of the main pole as a whole. By placing a spirit level at both ends of the main pole, the two ends of the main pole as a whole can be leveled to ensure that the installation height of both ends of the main pole remains consistent.

[0018] Before adjusting the height of the main rod, rotate the locking seat cover to close the upper side of the main rod, and then push the locking seat horizontally to drive the sliding part to slide, so that the locking protrusion slides from the bottom opening of the mounting groove to the inside of the mounting groove. When the height of the pillow plate rises subsequently, the locking protrusion is staggered with the bottom opening of the mounting groove, thereby preventing the locking protrusion from falling off, and allowing the locking seat to be stably connected to the top of the main rod, thereby longitudinally locking the main rod and realizing rapid installation of the main beam.

[0019] The present invention provides a steel structure truss support system for construction engineering, which has the following beneficial effects: 1. The present invention significantly improves the installation speed and construction efficiency of the steel structure truss support system, shortens the construction period, reduces labor costs, and enhances the stability and safety of the system through reasonable structural design and high-quality material selection, prolongs the service life, and has good reusability and environmental protection, which is conducive to resource conservation and environmental protection.

[0020] 2. The present invention inserts the main rod into the interior of the side cylinder, and then rotates the lead screw to allow the limiting rod to be inserted into the limiting groove on the surface of the main rod, thereby quickly fixing the main rod and the side cylinder, achieving rapid splicing between adjacent main rods, and facilitating assembly or disassembly by construction workers.

[0021] 3. The anti-loosening pin of the present invention is inserted into the anti-loosening groove under the elastic force of the spring member, so as to achieve the effect of automatically locking the lead screw, thereby preventing the lead screw from accidentally loosening and affecting the stability of the main rod splicing.

[0022] 4. The present invention inserts the spring-retractable locking column into the transverse locking hole to transversely lock the main rod as a whole, so that the locking seat is stably connected to the top of the main rod, and the main rod is longitudinally locked to achieve rapid installation of the main beam and the column. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A perspective view of the present invention; Figure 2 It is a schematic diagram of the main beam structure of the present invention; Figure 3 It is a schematic diagram of the structure of the splicing assembly of the present invention; Figure 4 It is a cross-sectional schematic diagram of the connecting cylinder and the side cylinder of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle; Figure 6 It is a schematic diagram of the structure of the sliding frame of the present invention; Figure 7 It is a schematic diagram of the base structure of the present invention; Figure 8 It is a schematic diagram of the limiter and the locking seat structure of the present invention.

[0024] Among them, 1. main beam; 101. main rod; 102. support rod; 103. base; 104. pillow plate; 105. mounting seat; 106. adjusting threaded column; 107. limiter; 108. placement slot; 109. mounting slot; 110. sliding member; 111. slider; 112. locking seat; 113. locking protrusion; 114. transverse locking hole; 115. spring telescopic locking column; 116. telescopic support tube; 2. secondary beam; 3. column; 4. Splicing assembly; 401. Center cylinder; 402. Side cylinder; 403. Connecting cylinder; 404. Lead screw; 405. Rotating disk; 406. Connecting rod; 407. Limiting rod; 408. Limiting layer; 409. Limiting groove; 410. Sliding frame; 411. Anti-loosening pin; 412. Anti-loosening groove; 413. Spring member; 414. Partition layer; 415. Reset spring; 5. Bracket one; 6. Bracket two; 8. Diagonal support; 9. Rotating handwheel. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Please see attached Figure 1 -Attached Figure 5The embodiment of the present invention provides a steel structure truss support system for a construction project, including a main beam 1, a secondary beam 2, a column 3 and a diagonal brace 8. The main beam 1 adopts an H-shaped steel truss. Both ends of the main beam 1 are fixedly connected with a bracket 5. The main beam 1 includes two main rods 101 and a plurality of support rods 102. A splicing component 4 is installed at the opposite end of two adjacent main beams 1. The splicing component 4 includes a central cylinder 401, two side cylinders 402 and a plurality of limit grooves 409. The outer wall of the central cylinder 401 and the outer walls of the two side cylinders 402 are respectively fixedly connected with two connecting cylinders 403. The two ends of the central cylinder 401 are respectively threadedly connected with a lead screw 404. One end of the lead screw 404 located inside the central cylinder 401 is rotatably connected with a rotating disk. 405, the outer wall of the rotating disk 405 is connected to two sets of connecting rods 406 through an axis rotation, the other end of the connecting rod 406 is connected to a limiting rod 407 through an axis rotation, one end of the limiting rod 407 passes through the connecting cylinder 403, and a limiting layer 408 is fixedly connected to the center of the inner wall of the side cylinder 402, and limiting grooves 409 are respectively opened at both ends of the main rod 101, the main rod 101 is circular or H-shaped, and a partition layer 414 is fixedly connected to the center of the inner wall of the connecting cylinder 403, the limiting rod 407 passes through the partition layer 414, and the outer wall of the limiting rod 407 is sleeved with a reset spring 415.

[0027] Specifically, the support rod 102 is used to connect and fix the main rod 101, the connecting tube 403 is used to connect the side cylinder 402 and the central cylinder 401, the central cylinder 401 is used to connect the lead screw 404, the side cylinder 402 is used for the main rod 101 to be inserted, the partition layer 414 is used to limit the limit rod 407, the reset spring 415 is used to apply elastic force to the limit rod 407 to assist the limit rod 407 in resetting, so that one end of the limit rod 407 is kept inside the connecting tube 403, and the limit layer 408 is used to limit the insertion depth of the main rod 101, so that when one end of the main rod 101 is against the limit layer 408, the limit groove 409 Aligning the limit rod 407, the lead screw 404 is used to drive the rotating disk 405 to move when rotating, and the movement of the rotating disk 405 drives the connecting rod 406 to rotate, thereby pushing the limit rod 407 to move inside the connecting tube 403, so that one end of the two sets of limit rods 407 can be synchronously inserted into or moved out of the limit groove 409. When the limit rod 407 is inserted into the limit groove 409, the main rod 101 is locked to achieve rapid splicing of the main rod 101. When the limit rod 407 is moved out of the limit groove 409, the lock on the main rod 101 is removed to achieve rapid disassembly of the main rod 101, thereby achieving the effect of facilitating construction personnel to assemble or disassemble the main rod 101.

[0028] Please see attached Figure 5One end of the lead screw 404 passes through the bracket 1 5, and the outer wall of the lead screw 404 is slidably connected with a rotating handwheel 9. The outer wall of the rotating handwheel 9 is rotatably connected to one end of the central cylinder 401, and the outer walls of the central cylinder 401 and the side cylinder 402 are fixedly connected with bracket 2 6. Bracket 1 5 and bracket 2 6 are set to be circular, square or triangular, and two sets of moving wheels are fixedly set on the lower surfaces of bracket 1 5 and bracket 2 6 respectively.

[0029] Specifically, rotating the hand wheel 9 makes it easier for construction workers to turn the screw 404, which is easy to use. Bracket 1 5 is used to reinforce the main rod 101, and bracket 2 6 is used to reinforce the central cylinder 401 and the side cylinder 402. By arranging moving wheels under bracket 1 5 and bracket 2 6, construction workers can push the main rod 101 and the side cylinder 402 during splicing, which facilitates the docking operation of the two.

[0030] Please see attached Figure 6 The splicing component 4 also includes a sliding frame 410, and two supporting wheels are fixedly arranged on the lower surface of the sliding frame 410. The outer wall of the bracket 5 protrudes outward to form a protrusion layer, and the protrusion layer is located on the lower side of the screw 404. The inner wall of the sliding frame 410 is slidably connected to the outer wall of the protrusion layer, and the inner top wall of the sliding frame 410 is fixedly connected with an anti-loosening pin 411, and the upper surface of the screw 404 is provided with an anti-loosening groove 412. The inner bottom wall of the sliding frame 410 is fixedly connected with a spring member 413, and the top end of the spring member 413 is fixedly connected to the lower surface of the protrusion layer.

[0031] Specifically, the raised layer is used to connect the sliding frame 410, and the support wheel is used to press against the ground during splicing to lift the sliding frame 410, so that the screw 404 and the anti-loosening pin 411 are staggered to avoid movement interference. When the main rod 101 is lifted for splicing, the support wheel is separated from the ground, and the sliding frame 410 slides downward due to the pulling force of the spring member 413, so that the anti-loosening pin 411 is inserted into the anti-loosening groove 412, thereby realizing automatic locking of the screw 404 to prevent the screw 404 from accidentally loosening and affecting the stability of the splicing of the main rod 101.

[0032] Please see attached Figure 7 A base 103 is respectively installed on the lower side of both ends of the main rod 101, and the base 103 is fixedly connected to the top of the column 3 through high-strength bolts. Two sets of telescopic support tubes 116 are fixedly connected to the upper surface of the base 103, and the other end of the telescopic support tube 116 is fixedly connected to the pillow plate 104. The outer wall of the telescopic support tube 116 is fixedly connected to the mounting seat 105, and the center of the mounting seat 105 is threadedly connected with an adjusting threaded column 106, and the top of the adjusting threaded column 106 is rotatably connected to the lower surface of the pillow plate 104.

[0033] Specifically, the base 103 is detachably connected to the column 3 by high-strength bolts, the telescopic support tube 116 is used to connect the base 103 and the mounting seat 105 to fix the mounting seat 105 and limit the lifting direction of the pillow plate 104, and the rotation of the adjusting threaded column 106 is used to drive the pillow plate 104 to rise and fall. The lifting of the pillow plate 104 is used to adjust the height of the upper main pole 101, so that the main pole 101 remains horizontal to avoid affecting the subsequent construction and installation.

[0034] Please see attached Figure 8 Two L-shaped limit members 107 are fixedly connected to the upper surface of the pillow plate 104, and a placement groove 108 is opened on the upper surface of the limit member 107, and an L-shaped installation groove 109 is opened on the side wall of the limit member 107. A sliding member 110 is installed on one side of the pillow plate 104, and the bottom end of the sliding member 110 is fixedly connected to the upper surface of the pillow plate 104, and a slider 111 is slidably connected to the upper surface of the sliding member 110. The upper surface of the slider 111 is connected to a locking seat 112 by an axial rotation. A card groove is opened on the surface of the locking seat 112, and the outer wall of the locking seat 112 protrudes outward to form an L-shaped locking protrusion 113. Horizontal locking holes 114 are respectively opened on the lower surfaces of the two ends of the main rod 101, and a spring telescopic locking column 115 is inserted in the interior of the horizontal locking hole 114, and the bottom end of the spring telescopic locking column 115 is fixedly connected to the upper surface of the pillow plate 104.

[0035] Specifically, the card slot and the placement slot 108 are used to accommodate the main rod 101, the placement slot 108 is used to place the main rod 101, the bottom end of the installation slot 109 is open, and a limiting layer 408 is arranged on the outer side of the inner wall of the installation slot 109, the bottom end of the limiting layer 408 is higher than the opening, and the opening is used for the locking protrusion 113 to move into the installation slot 109, and the limiting layer 408 is used to clamp the locking protrusion 113 when the locking protrusion 113 rises, so as to fix the locking seat 112, the sliding member 110 is used to slide and connect the slider 111, and the slider 111 is used to rotate and connect the locking seat 112, so that the locking seat 112 and the locking protrusion 113 can slide along the sliding member 110 while rotating, and when fixing the main rod 101, the base 103 is first fixed to the top of the column 3, Then, the main rod 101 is placed in the placement groove 108. At this time, the main rod 101 will squeeze the spring telescopic locking column 115 to make it contract. After the main rod 101 is moved horizontally to align the spring telescopic locking column 115 with the transverse locking hole 114, the spring telescopic locking column 115 is stretched and inserted into the interior of the transverse locking hole 114, thereby transversely locking the main rod 101. Then, the locking protrusion 113 is inserted into the installation groove 109, and then the adjusting threaded column 106 is rotated to drive the locking protrusion 113 to rise, so that the locking seat 112 can stably clamp the main rod 101, effectively preventing the main rod 101 from falling off, while realizing the rapid assembly of the main beam 1. Finally, the height can be adjusted by rotating the adjusting threaded column 106 according to the level of the main rod 101 measured by the spirit level.

[0036] Please see attached Figure 1 -Attached Figure 8 , the method for erecting a steel structure truss for a construction project comprises the following steps: S1. Measure and mark the position of the columns 3 to ensure that the spacing between each column 3 meets the design requirements; S2. Dig foundation holes with a depth of not less than 500mm and a width of not less than 300mm; S3, put the column 3 into the hole, correct its verticality, and then pour concrete into the hole to firmly fix the column 3; S4. After the concrete solidifies, fix the base of column 3 to the foundation with expansion bolts; S5. Lift the main beam 1 to the top of the column 3 and fix the main beam 1 to the column 3 with high-strength bolts; S6. Check whether the connection between the main beam 1 and the column 3 is tight, and tighten it again if necessary; S7. Weld the secondary beam 2 under the main beam 1, ensuring that the welding points are evenly distributed and the welding quality is good; S8, welding the diagonal brace 8 to the main beam 1 and the column 3 to strengthen the rigidity of the overall structure; S9. Thoroughly check all connection parts and complete the installation after confirming that they are correct.

[0037] Specifically, first place the column 3 at the predetermined position and fix it to the foundation with expansion bolts. Next, fix the main beam 1 to the top of the column 3 with high-strength bolts to ensure the tight connection between the main beam 1 and the column 3. Subsequently, weld the secondary beam 2 under the main beam 1 to form a stable plane frame. Finally, weld the diagonal brace 8 to the main beam 1 and the column 3 to increase the rigidity of the overall structure. During the whole process, the movements of each component are coordinated to ensure the stability and safety of the system. The main rod 101 adopts Q345B H-shaped steel with a specification of 600mm×300mm×12mm×18mm; the secondary beam 2 adopts Q345B H-shaped steel with a specification of 300mm×150mm×6mm×9mm; the column 3 adopts Q345B square steel pipe with a specification of 200mm×200mm×10mm; the diagonal brace 8 adopts Q235B angle steel with a specification of L75×75×6mm. The high-strength bolts are 10.9-grade M24 bolts, and the length is determined according to actual needs; the expansion bolts are 20mm in diameter and 120mm in length. In addition, other types of H-shaped steel can be used to replace the main beam 1 and the secondary beam 2, such as Q345D H-shaped steel, with a specification of 600mm×300mm×14mm×20mm; round steel pipes can be used instead of square steel pipes as columns 3, with a specification of Φ200mm×10mm; channel steel can be used instead of angle steel as diagonal braces 8, with a specification of L100×63×6mm. In addition, tensioning steel bars can be set inside the columns 3 to apply pressure in advance, thereby reducing the risk of deformation in later use. This method can significantly improve the stability and durability of the system, and is particularly suitable for use in areas with complex geological conditions. Alternatively, lightweight alloy materials can be used to make some components, such as columns 3 and diagonal braces 8, to reduce the overall weight and improve the convenience of transportation and installation. At the same time, lightweight alloy materials also have better corrosion resistance and a longer service life, and are suitable for engineering projects in coastal areas.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel structure truss support system for a construction project, comprising a main beam (1), a secondary beam (2), a column (3) and a diagonal brace (8), characterized in that: The main beam (1) adopts an H-shaped steel truss, and the two ends of the main beam (1) are respectively fixedly connected with a bracket (5), the main beam (1) comprises two main rods (101) and a plurality of supporting rods (102), and a splicing assembly (4) is installed at the opposite end of two adjacent main beams (1), and the splicing assembly (4) comprises a central cylinder (401), two side cylinders (402) and a plurality of limiting grooves (409), and the outer wall of the central cylinder (401) and the outer walls of the two side cylinders (402) are respectively fixedly connected with two connecting cylinders (403), and the two ends of the central cylinder (401) are respectively fixedly connected with a bracket (5 ... A lead screw (404) is threadedly connected, one end of the lead screw (404) located inside the central cylinder (401) is rotatably connected to a rotating disk (405), the outer wall of the rotating disk (405) is rotatably connected to two groups of connecting rods (406) via an axis, the other end of the connecting rod (406) is rotatably connected to a limiting rod (407) via an axis, one end of the limiting rod (407) passes through the connecting cylinder (403), the center of the inner wall of the side cylinder (402) is fixedly connected to a limiting layer (408), and the limiting grooves (409) are respectively provided at both ends of the main rod (101).

2. A steel structure truss support system for construction engineering according to claim 1, characterized in that: One end of the lead screw (404) passes through bracket one (5); the outer wall of the lead screw (404) is slidably connected to a rotating hand wheel (9); and the outer wall of the rotating hand wheel (9) is rotatably connected to one end of the central cylinder (401).

3. The steel structure truss support system for construction engineering according to claim 1, characterized in that: The outer walls of the central cylinder (401) and the side cylinder (402) are fixedly connected with a bracket 2 (6); the bracket 1 (5) and the bracket 2 (6) are arranged in a circular, square or triangular shape; and the lower surfaces of the bracket 1 (5) and the bracket 2 (6) are respectively fixedly provided with two sets of moving wheels.

4. The steel structure truss support system for construction engineering according to claim 1, characterized in that: The splicing assembly (4) further comprises a sliding frame (410), the lower surface of which is fixedly provided with two supporting wheels, the outer wall of the bracket one (5) protrudes outward to form a protruding layer, the protruding layer is located on the lower side of the lead screw (404), the inner wall of the sliding frame (410) is slidably connected to the outer wall of the protruding layer, and the inner top wall of the sliding frame (410) is fixedly connected with an anti-loosening pin (411).

5. The steel structure truss support system for construction engineering according to claim 4, characterized in that: An anti-loosening groove (412) is provided on the upper surface of the lead screw (404), a spring member (413) is fixedly connected to the inner bottom wall of the sliding frame (410), and the top end of the spring member (413) is fixedly connected to the lower surface of the protruding layer.

6. The steel structure truss support system for construction engineering according to claim 1, characterized in that: Bases (103) are respectively installed on the lower sides of both ends of the main rod (101); the bases (103) are fixedly connected to the top of the column (3) via high-strength bolts; two groups of telescopic support tubes (116) are fixedly connected to the upper surface of the base (103); the other ends of the telescopic support tubes (116) are fixedly connected to the pillow plate (104); the outer wall of the telescopic support tube (116) is fixedly connected to a mounting seat (105); an adjusting threaded column (106) is threadedly connected at the center of the mounting seat (105); and the top end of the adjusting threaded column (106) is rotatably connected to the lower surface of the pillow plate (104).

7. A steel structure truss support system for construction engineering according to claim 6, characterized in that: Two L-shaped limiting members (107) are fixedly connected to the upper surface of the pillow plate (104); a placement groove (108) is provided on the upper surface of the limiting member (107); and an L-shaped installation groove (109) is provided on the side wall of the limiting member (107).

8. The steel structure truss support system for construction engineering according to claim 6, characterized in that: A sliding member (110) is installed on one side of the pillow plate (104); the bottom end of the sliding member (110) is fixedly connected to the upper surface of the pillow plate (104); the upper surface of the sliding member (110) is slidably connected to a slider (111); the upper surface of the slider (111) is rotatably connected to a locking seat (112) via an axis; a slot is provided on the surface of the locking seat (112); and an outer wall of the locking seat (112) protrudes outward to form an L-shaped locking protrusion (113).

9. The steel structure truss support system for construction engineering according to claim 6, characterized in that: The lower surfaces of both ends of the main rod (101) are respectively provided with transverse locking holes (114), the interiors of the transverse locking holes (114) are plugged with spring telescopic locking columns (115), and the bottom ends of the spring telescopic locking columns (115) are fixedly connected to the upper surface of the pillow plate (104).

10. The method for erecting a steel structure truss for a construction project according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Measure and mark the position of the columns (3) to ensure that the spacing between each column (3) meets the design requirements; S2. Dig a foundation hole with a depth of not less than 500 mm and a width of not less than 300 mm; S3. Place the column (3) in the hole, correct its verticality, and then pour concrete into the hole to firmly fix the column (3); S4. After the concrete solidifies, use expansion bolts to fix the base of the column (3) on the foundation; S5. Lift the main beam (1) to the column ( 3) At the top, fix the main beam (1) to the column (3) with high-strength bolts; S6. Check whether the connection between the main beam (1) and the column (3) is tight, and tighten it again if necessary; S7. Weld the secondary beam (2) under the main beam (1), ensuring that the welding points are evenly distributed and the welding quality is good; S8. Weld the diagonal brace (8) to the main beam (1) and the column (3) to strengthen the rigidity of the overall structure; S9. Comprehensively check all connection parts and complete the installation after confirming that they are correct.

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