Steel pipe triangular truss supporting system and construction method

Abstract

The invention relates to the technical field of building construction, and particularly discloses a steel pipe triangular truss supporting system and a construction method.The steel pipe triangular truss supporting system comprises a plurality of supporting units, and every two adjacent supporting units are fixedly connected through a connecting rod assembly; each supporting unit comprises chord members and web members, and further comprises first connecting assemblies and second connecting assemblies, every two adjacent chord members are connected and fixed through the corresponding first connecting assembly, and the chord members and the web members are connected and fixed through the corresponding second connecting assemblies; the first connecting assembly comprises a connecting pipe and first connectors arranged at the two ends of the connecting pipe, and the two first connectors are connected with the two chord members correspondingly; the second connecting assembly comprises a pipe sleeve, and the pipe sleeve is slidably arranged on the chord member in a sleeving mode; the outer wall of the pipe sleeve is fixedly connected with two connecting short pipes, the tail ends of the connecting short pipes are provided with second connectors, and the two ends of the web member are fixedly connected with the pipe sleeve through the second connectors. A non-welding mode is adopted in the connecting mode, and the quality defect caused by welding can be avoided.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a steel pipe triangular truss support system and construction method. Background Technology

[0002] A steel tube triangular truss is a planar or spatial load-bearing structure that uses steel tubes as members to form one or more triangular units. In building construction, triangular trusses are often used as a support system for formwork, featuring high rigidity and stability, simple structure, reliable performance, and convenient operation and use.

[0003] However, most existing truss structures employ intersecting welding, and the quality and stability of the welds directly affect the overall performance of the truss. Improper welding techniques or non-standard operations can lead to defects such as cracks, slag inclusions, and incomplete fusion in the welds, thereby reducing the truss's support capacity. Furthermore, during welding, localized heating and cooling generate residual stresses in and around the weld. These residual stresses can cause additional deformation and stress concentration in the truss under external forces, affecting its performance. Summary of the Invention

[0004] The purpose of this invention is to provide a steel pipe triangular truss support system and construction method to solve the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention provides a steel pipe triangular truss support system, comprising multiple support units, with adjacent support units connected and fixed by a connecting rod assembly; each support unit includes a chord and a web member, the chord and the web member together forming a triangular truss structure; each support unit further includes a first connecting assembly and a second connecting assembly, with adjacent chords connected and fixed by the first connecting assembly, and the chord and the web member connected and fixed by the second connecting assembly; the first connecting assembly includes a connecting pipe and first connectors disposed at both ends of the connecting pipe, the two first connectors respectively connecting two chords; the second connecting assembly includes a sleeve, the sleeve being slidably fitted onto the chord; two connecting short pipes are fixedly connected to the outer wall of the sleeve, the ends of the connecting short pipes are fitted with second connectors, and both ends of the web member are connected and fixed to the sleeve through the second connectors.

[0006] Preferably, the first connector and the second connector have the same structure.

[0007] Preferably, both the first connector and the second connector include a threaded sleeve. A connecting plate is fixedly connected to one end of the threaded sleeve, and a compression sleeve is fixedly connected to the side of the connecting plate away from the threaded sleeve. The threaded sleeve and the compression sleeve are coaxially arranged. The ends of the chord and the web are both provided with external threads, and the chord and the web are both threadedly connected to the threaded sleeve. The connecting pipe and the connecting short pipe are both connected and fixed to the compression sleeve.

[0008] Preferably, both the chord and the web are tubular structures.

[0009] Preferably, an inner sleeve is fixedly connected to the side of the connecting plate near the threaded sleeve. The inner sleeve is coaxially arranged with the threaded sleeve, and the distance between the inner sleeve and the threaded sleeve is not less than the wall thickness of the chord or the web member. Multiple deformation joints are formed on the wall of the inner sleeve. A threaded hole is formed in the middle of the connecting plate, and a bolt rod is threaded into the threaded hole. An expansion head is fixedly provided at one end of the bolt rod, and the expansion head is located at the end of the inner sleeve away from the connecting plate. A nut is threaded to the other end of the bolt rod.

[0010] Preferably, the number of nuts is not less than two, and the distance between the two nuts is not less than 5cm.

[0011] Preferably, the connecting pipe is a V-shaped pipe, which includes a right-angled V-shaped pipe and two acute-angled V-shaped pipes; the included angle between the two connecting short pipes on the sleeve includes a right angle and two acute angles, and the two acute angles are respectively consistent with the angles of the two acute-angled V-shaped pipes.

[0012] Preferably, the connecting rod assembly includes a support rod, both ends of which are fixedly connected to a sleeve, and the two sleeves are respectively fixedly sleeved on the chords in two adjacent support units.

[0013] Preferably, the ratio of the distance between two adjacent support units to the height of the support unit is 0.1 to 0.8:1.

[0014] A construction method for a steel pipe triangular truss support system includes the following steps: cutting chords and web members according to the structural dimensions of the triangular truss, and determining the structural style of connecting pipes and sleeves; connecting web members to sleeves via second connectors to assemble the triangular web member structure; inserting chord members into the sleeves of the assembled triangular web member structure, and installing first connectors at both ends of the chord members; connecting chord members via connecting pipes to complete the assembly of the triangular truss structure; repeating the above operations until a specified number of triangular truss structures are assembled; pre-embedding reinforcing bars at the formwork support locations, and connecting adjacent triangular truss structures at the formwork support locations using connecting rod assemblies to form a triangular truss support system; and fixing the triangular truss support system using the pre-embedded reinforcing bars.

[0015] Compared with the prior art, the present invention has the following advantages and technical effects.

[0016] The steel tube triangular truss support system provided by the present invention connects and fixes the support units through connecting rod assemblies. The chords and web members in the support unit are connected through a first connecting assembly and a second connecting assembly. The connection method adopts a non-welding method, thereby avoiding quality defects caused by improper welding process or non-standard operation, as well as residual stress causing additional deformation and stress concentration of the truss under external force. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the steel pipe triangular truss support system of the present invention;

[0019] Figure 2 This is a schematic diagram of the triangular truss structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the first connector or the second connector of the present invention;

[0021] Figure 4 This is a schematic diagram of the internal structure of the first connector or the second connector of the present invention;

[0022] In the diagram: 1. Chord member; 2. Web member; 3. Connecting pipe; 4. First connector; 5. Pipe sleeve; 6. Connecting short pipe; 7. Second connector; 8. Threaded sleeve; 9. Connecting plate; 10. Extrusion sleeve; 11. Inner sleeve; 12. Expansion joint; 13. Bolt rod; 14. Expansion head; 15. Nut; 16. Support rod; 17. Hoop. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other. The described embodiments are merely some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this invention. The invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] Example 1

[0025] like Figures 1 to 4 As shown, the present invention provides a steel pipe triangular truss support system, including multiple support units, with adjacent support units connected and fixed by a connecting rod assembly; each support unit includes a chord member 1 and a web member 2, the chord member 1 and the web member 2 together forming a triangular truss structure; the support unit also includes a first connecting assembly and a second connecting assembly, with adjacent chord members 1 connected and fixed by the first connecting assembly, and chord members 1 and web members 2 connected and fixed by the second connecting assembly; the first connecting assembly includes a connecting pipe 3 and first connectors 4 disposed at both ends of the connecting pipe 3, the two first connectors 4 respectively connecting two chord members 1; the second connecting assembly includes a sleeve 5, the sleeve 5 being slidably fitted onto the chord member 1; two connecting short pipes 6 are fixedly connected to the outer wall of the sleeve 5, and second connectors 7 are installed at the ends of the connecting short pipes 6, with both ends of the web member 2 being connected and fixed to the sleeve 5 by the second connectors 7.

[0026] The support units of this invention are connected and fixed by connecting rod assemblies. The chord 1 and web 2 in the support unit are connected by a first connecting assembly and a second connecting assembly. The connection method adopts a non-welding method, thereby avoiding quality defects caused by improper welding process or non-standard operation, as well as residual stress causing additional deformation and stress concentration of the truss under external force.

[0027] The design was further optimized so that the first connector 4 and the second connector 7 have the same structure.

[0028] In a further optimized design, both the first connector 4 and the second connector 7 include a threaded sleeve 8. One end of the threaded sleeve 8 is fixedly connected to a connecting plate 9, and the side of the connecting plate 9 away from the threaded sleeve 8 is fixedly connected to a compression sleeve 10. The threaded sleeve 8 and the compression sleeve 10 are coaxially arranged. The ends of the chord 1 and the web 2 are both provided with external threads, and the chord 1 and the web 2 are both threadedly connected to the threaded sleeve 8. The connecting pipe 3 and the connecting short pipe 6 are both connected and fixed to the compression sleeve 10.

[0029] The present invention provides a threaded sleeve 8 that is connected to the chord 1 and the web member 2 by means of a threaded connection. The extrusion sleeve 10 and the connecting pipe 3 and the connecting short pipe 6 are connected by applying radial pressure to the extrusion sleeve 10 to plastically deform it, thereby achieving connection and fixation.

[0030] The design was further optimized so that both chord 1 and web member 2 are tubular structures.

[0031] In a further optimized design, an inner sleeve 11 is fixedly connected to the side of the connecting plate 9 near the threaded sleeve 8. The inner sleeve 11 is coaxially arranged with the threaded sleeve 8, and the distance between the inner sleeve 11 and the threaded sleeve 8 is not less than the wall thickness of the chord 1 or the web member 2. Multiple expansion joints 12 are opened on the wall of the inner sleeve 11. A threaded hole is opened in the middle of the connecting plate 9, and a bolt rod 13 is threadedly connected to the threaded hole. An expansion head 14 is fixedly installed at one end of the bolt rod 13. The expansion head 14 is located at the end of the inner sleeve 11 away from the connecting plate 9, and a nut 15 is threadedly connected to the other end of the bolt rod 13.

[0032] With the bolt rod 13 and inner sleeve 11 in place, after the chord rod 1 or web rod 2 is connected and fixed to the threaded sleeve 8, the bolt rod 13 is tightened by the nut 15. Under the action of the expansion head 14, the inner sleeve 11 is deformed by the expansion head 14 and the expansion joint 12. The deformed inner sleeve 11 then exerts a squeezing effect on the chord rod 1 or web rod 2, thereby improving the stability of the connection. The distance that the bolt rod 13 moves under the action of the nut 15 needs to be controlled to prevent excessive deformation of the inner sleeve 11 from causing structural damage to the chord rod 1 or web rod 2.

[0033] The scheme is further optimized so that there are no fewer than two nuts 15, and the distance between the two nuts 15 is no less than 5cm.

[0034] By setting two nuts 15, the nut 15 closer to the connecting plate 9 is used to move the bolt rod 13, and the other nut 15 is set at a certain distance from the first nut 15. In this way, when the extrusion sleeve 10 is extruded, the nut 15 can generate a natural blocking effect, thereby improving the stability of the extrusion sleeve 10 after extrusion.

[0035] Further optimization of the scheme: the connecting pipe 3 is a V-shaped pipe, which includes a right-angled V-shaped pipe and two acute-angled V-shaped pipes; the included angle between the two connecting short pipes 6 on the pipe sleeve 5 includes a right angle and two acute angles, and the two acute angles are consistent with the angles of the two acute-angled V-shaped pipes respectively.

[0036] Further optimization of the scheme: the connecting rod assembly includes a support rod 16, and both ends of the support rod 16 are fixedly connected with a sleeve 17. The two sleeves 17 are respectively fixedly sleeved on the chord rod 1 in the two adjacent support units.

[0037] Using the sleeve 17 for connection can avoid damaging the integrity of chord 1, thus ensuring the strength of chord 1.

[0038] The scheme was further optimized so that the ratio of the distance between two adjacent support units to the height of the support unit was 0.1 to 0.8:1.

[0039] To ensure support strength, the higher the support unit is, the greater the density of the support unit needs to be, thereby ensuring the support effect.

[0040] A construction method for a steel pipe triangular truss support system includes the following steps: cutting chord members 1 and web members 2 according to the structural dimensions of the triangular truss, and determining the structural style of connecting pipes 3 and sleeves 5, wherein the structural style refers to the angle of connecting pipes 3 and the included angle between two connecting short pipes 6 on sleeves 5; connecting web members 2 to sleeves 5 through second connectors 7 to assemble the triangular web member 2 structure; the connection between the second connectors 7 and web members 2 is achieved by using threaded bolts 13 to deform the inner sleeve 11, and the connection between the second connectors 7 and the connecting short pipes 6 on sleeves 5 is achieved by extrusion, thereby forming multiple triangular structures stacked vertically on top of each other in the web members 2, and the upper and lower triangular structures are connected by the bottom sleeve 5 of the upper triangular structure being fitted onto the top web members 2 of the lower triangular structure; inserting chord members 1 through sleeves 5 of the assembled triangular web member 2 structure, and installing first connectors 4 at both ends of chord members 1; the chord members 1 and sleeves 5 are connected by a movable connection. Under the structural action of the web member 2, the relative position between the sleeve 5 and the chord member 1 cannot be changed; the connection between the first connector 4 and the chord member 1 is achieved by using a threaded bolt rod 13 to deform the inner sleeve 11; the chord member 1 is connected through the connecting pipe 3 to complete the assembly of the triangular truss structure; the connecting pipe 3 has a specified angle, and the connection between the connecting pipe 3 and the first connector 4 is achieved by extrusion; the above operation is repeated until the assembly of a specified number of triangular truss structures is completed; steel bars are pre-embedded at the formwork support position, and two adjacent triangular truss structures are connected at the formwork support position using connecting rod assemblies to form a triangular truss support system; the triangular truss support system is fixed using the pre-embedded steel bars; when fixing the triangular truss support system using the pre-embedded steel bars, the pre-embedded steel bars are wrapped around the connecting pipe 3 or the chord member 1 at the bottom of the triangular truss structure, and after the pre-embedded steel bars are wrapped a certain number of times, the ends of the pre-embedded steel bars are welded to the pre-embedded steel bars; when dismantling the triangular truss structure, the pre-embedded steel bars are simply cut off.

[0041] Example 2

[0042] The difference between this embodiment and Embodiment 1 is that the number of connecting short pipes 6 on the sleeve 5 can be increased, and the orientation of the added connecting short pipes 6 can be changed. In this way, the connection between two adjacent triangular truss structures can be realized by using the connection between the sleeve 5, the connecting short pipes 6, and the web member 2.

[0043] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A steel pipe triangular truss support system, characterized in that, The system includes multiple support units, with adjacent support units connected and fixed by a connecting rod assembly. Each support unit includes a chord (1) and a web member (2), which together form a triangular truss structure. The support unit also includes a first connecting assembly and a second connecting assembly, with adjacent chords (1) connected and fixed by the first connecting assembly, and the chord (1) and the web member (2) connected and fixed by the second connecting assembly. The first connecting assembly includes a connecting pipe (3) and first connectors (4) located at both ends of the connecting pipe (3), with the two first connectors (4) respectively connecting the two chords (1). The second connecting assembly includes a sleeve (5), which is slidably fitted onto the chord (1). Two short connecting pipes (6) are fixedly connected to the outer wall of the sleeve (5), and a second connector (7) is installed at the end of the short connecting pipe (6). Both ends of the web member (2) are connected and fixed to the sleeve (5) through the second connector (7).

2. The steel pipe triangular truss support system according to claim 1, characterized in that, The first connector (4) has the same structure as the second connector (7).

3. The steel pipe triangular truss support system according to claim 2, characterized in that, Both the first connector (4) and the second connector (7) include a threaded sleeve (8). One end of the threaded sleeve (8) is fixedly connected to a connecting plate (9). The side of the connecting plate (9) away from the threaded sleeve (8) is fixedly connected to a compression sleeve (10). The threaded sleeve (8) and the compression sleeve (10) are coaxially arranged. The ends of the chord (1) and the web (2) are both provided with external threads. The chord (1) and the web (2) are both threadedly connected to the threaded sleeve (8). The connecting pipe (3) and the connecting short pipe (6) are both connected and fixedly connected to the compression sleeve (10).

4. The steel pipe triangular truss support system according to claim 3, characterized in that, Both the chord (1) and the web (2) are tubular structures.

5. The steel pipe triangular truss support system according to claim 4, characterized in that, The connecting plate (9) is fixedly connected to an inner sleeve (11) on the side near the threaded sleeve (8). The inner sleeve (11) is coaxially arranged with the threaded sleeve (8), and the distance between the inner sleeve (11) and the threaded sleeve (8) is not less than the wall thickness of the chord (1) or the web (2). Multiple deformation seams (12) are opened on the wall of the inner sleeve (11). A threaded hole is opened in the middle of the connecting plate (9), and a bolt rod (13) is threadedly connected in the threaded hole. An expansion head (14) is fixedly provided at one end of the bolt rod (13). The expansion head (14) is located at the end of the inner sleeve (11) away from the connecting plate (9), and a nut (15) is threadedly connected to the other end of the bolt rod (13).

6. The steel pipe triangular truss support system according to claim 5, characterized in that, The number of nuts (15) is not less than two, and the distance between two nuts (15) is not less than 5cm.

7. The steel pipe triangular truss support system according to claim 1, characterized in that, The connecting pipe (3) is a V-shaped pipe, which includes a right-angled V-shaped pipe and two acute-angled V-shaped pipes; the included angle between the two connecting short pipes (6) on the sleeve (5) includes a right angle and two acute angles, and the two acute angles are respectively consistent with the angles of the two acute-angled V-shaped pipes.

8. The steel pipe triangular truss support system according to claim 1, characterized in that, The connecting rod assembly includes a support rod (16), and both ends of the support rod (16) are fixedly connected to a sleeve (17). The two sleeves (17) are respectively fixedly sleeved on the chord (1) in the two adjacent support units.

9. The steel pipe triangular truss support system and construction method according to claim 1, characterized in that, The ratio of the distance between two adjacent support units to the height of the support unit is 0.1 to 0.8:

1.

10. A construction method for a steel pipe triangular truss support system according to any one of claims 1-9, characterized in that, Includes the following steps: Cut the chord members (1) and web members (2) according to the structural dimensions of the triangular truss, and determine the structural style of the connecting pipe (3) and the sleeve (5); The web member (2) is connected to the sleeve (5) through the second connector (7) to realize the assembly of the triangular web member (2) structure; A chord (1) is inserted into the sleeve (5) of the assembled triangular web member (2) structure, and a first connector (4) is installed at both ends of the chord (1). The chord member (1) is connected by the connecting pipe (3) to complete the assembly of the triangular truss structure; Repeat the above steps until the specified number of triangular truss structures have been assembled. Reinforcing bars are pre-embedded at the formwork support location, and two adjacent triangular truss structures are connected at the formwork support location using connecting rod assemblies to form a triangular truss support system; The triangular truss support system is fixed by pre-embedded steel bars.

Images