Steel truss construction method

Abstract

The invention discloses a steel truss construction method. A first section of truss and a second section of truss are spliced in a truss splicing area; then a first section of temporary supporting structure and a second section of temporary supporting structure which are composed of a lower supporting platform, a lifting mechanism, a lattice supporting base and an upper supporting platform are erected between the shock insulation layer and the pool base and between the pool base and the building base respectively; a third section of temporary supporting structure composed of a lower supporting platform, a lifting mechanism, a lattice supporting base and a supporting mechanism is erected on the building base, then the first section of truss and the second section of truss are hoisted, and the ends of the first section of truss and the second section of truss are supported through the supporting mechanism; the temporary supporting structure can adapt to a step-shaped stand conveniently through the lower supporting platform, reverse jacking of the temporary supporting structure is facilitated through the upper supporting platform, and the problem that the temporary supporting structure is inconvenient to erect is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of steel structure construction, and in particular relates to a steel truss construction method. Background Art

[0002] With the improvement of the quality of life today, the number of places such as dance theaters is increasing. In order to meet the use functions of such places, a large space needs to be provided in the structure. Steel structures have been widely used in the construction industry, especially in some large public buildings. For buildings with large spans, high heights or irregular shapes, the use of steel truss roof structures can meet the design requirements.

[0003] Due to the large span and heavy weight of the structure, the lifting requirements cannot be met when the entire section is lifted, so it needs to be lifted in sections. During the section-by-section lifting process, one end of the first truss is connected to the first structural support, and the other end is in a suspended state. The second truss is connected to the second structural support, and the end is also in a suspended state, so it is necessary to set up a temporary support structure to support the ends of the first truss and the second truss. Since the truss structure belongs to the roof structure, the structures of the lower layers have been installed, and the temporary support structure needs to be supported on the floors of each layer when it is erected. Since the steps of the stands are in the shape of steps, it is inconvenient to set up a temporary support structure, and when setting up the temporary support structure, it is necessary to reverse the top on the lower floor to avoid damage to the floor. In addition, for buildings with steps of stands such as lecture halls, conference halls, and song and dance theaters, the floors are usually inclined in both directions, which is not convenient for the erection and reverse top of the temporary support structure, so it is urgently needed to be improved. Summary of the invention

[0004] The purpose of the present invention is to solve the above-mentioned technical problems existing in the prior art and to provide a steel truss construction method, in which a first section of truss and a second section of truss are assembled in a truss assembly area, and then a first section of temporary support structure and a second section of temporary support structure consisting of a lower support platform, a lifting mechanism, a lattice support seat and an upper support platform are respectively set up between the seismic isolation layer and the pool seat, and between the pool seat and the building seat, and a third section of temporary support structure consisting of a lower support platform, a lifting mechanism, a lattice support seat and a support mechanism is set up on the building seat, and then the first section of truss and the second section of truss are hoisted respectively and supported by the support mechanism, so that the temporary support structure can adapt to the stepped stands through the lower support platform, and the temporary support structure can be reversed through the upper support platform, thereby solving the problem that the temporary support structure is inconvenient to set up.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A steel truss construction method, characterized by comprising the following steps:

[0007] S1. Establish a truss assembly area, assemble the trusses in the truss assembly area, and form the first truss section and the second truss section after the assembly is completed;

[0008] S2. Set up a temporary support structure. The temporary support structure includes a lower support platform, a lifting mechanism, a lattice support seat, an upper support platform and a support mechanism. When setting up a temporary support structure, it needs to be set up in three sections on the same horizontal projection plane. The first section of the temporary support structure and the second section of the temporary support structure are both composed of a lower support platform, a lifting mechanism, a lattice support seat and an upper support platform. The third section of the temporary support structure is composed of a lower support platform, a lifting mechanism, a lattice support seat and a support mechanism.

[0009] S3. Determine the connection position of the first truss section and the second truss section after installation according to the design drawings, set up a temporary support structure at the position corresponding to the connection position, the connection point of the first truss section and the second truss section is supported on the temporary support structure, the first truss section and the second truss section are supported by the temporary support structure, the first temporary support structure is set on the top plate of the seismic isolation layer through the lower support platform, the upper support platform of the first temporary support structure is against the bottom plate of the pool seat, the second temporary support structure is set on the top plate of the pool seat through the lower support platform, the upper support platform of the second temporary support structure is against the building seat, the third temporary support structure is set on the top plate of the building seat through the lower support platform, one end of the connection between the first truss section and the second truss section is supported on the support mechanism of the third temporary support structure, and supported by the support mechanism;

[0010] S4. After the temporary support structure is erected, the first section of the truss is hoisted first, with one end of the first section of the truss supported on the first structural support and the other end supported on the temporary support structure. Then the second section of the truss is hoisted, with one end of the second section of the truss supported on the temporary support structure and the middle part of the second section of the truss supported on the second structural support, thus achieving the hoisting of the first section of the truss and the second section of the truss;

[0011] S5. After the first truss section and the second truss section are hoisted, their connection positions are connected and fixed, and then one end of the first truss section is welded and fixed to the first structural support, and the middle part of the second truss section is welded and fixed to the second structural support, thereby completing the installation of a single truss;

[0012] S6. After the installation of the first and second trusses is completed, the temporary support structure and the wind ropes are removed;

[0013] S7. Repeat steps S3-S5 to complete the installation of the steel truss.

[0014] Further, the detailed steps of step S1 are:

[0015] a. First, use the total station to place the axis of the unit to be assembled in the truss assembly area, and then place the assembly frame according to the axis position of the truss;

[0016] b. Then assemble the first section of the truss, hoist the chord of the first section of the truss onto the assembly frame, support it through the assembly frame, and then install the web between the chords, and fix the chord and the web to achieve the assembly of the first section of the truss;

[0017] c. Finally, assemble the second section of the truss. Hoist the chord of the second section of the truss onto the assembly frame, support it with the assembly frame, and then install the web between the chords. The chord and the web are fixedly installed, thereby realizing the assembly of the second section of the truss.

[0018] Furthermore, the assembled tire frame includes a tire frame base plate, tire frame legs and a tire frame crossbeam. The tire frame legs are fixedly installed on the tire frame base plate, and the tire frame crossbeam is installed on the tire frame legs. When assembling the truss, the truss is supported on the tire frame crossbeam, and the tire frame legs are in an inverted "V" structure to increase support stability.

[0019] Furthermore, in step S4, when the first section of the truss is hoisted onto the structural support one and the temporary support structure, it is necessary to pull a guy rope to stabilize the first section of the truss to prevent the first section of the truss from falling. When the second section of the truss is hoisted onto the structural support two and the temporary support structure, it is necessary to set up a circular tube support. The other end of the second section of the truss is supported on the circular tube support. The circular tube support increases the stability of the second section of the truss to prevent the second section of the truss from falling. The circular tube support is also provided with an inclined support tube, which is used to fix the circular tube support.

[0020] Furthermore, the lower supporting platform includes retractable supporting legs and a distance adjusting mechanism, the distance adjusting mechanism is used to adjust the distance between the two supporting legs, and the supporting legs are also provided with a mounting platform, and the mounting platform is used to install the lifting mechanism.

[0021] The supporting leg is provided with an inner cavity, in which an adjusting cylinder is installed, and the output end of the adjusting cylinder is connected to the connecting supporting leg, and the connecting supporting leg is pushed to move along the inner cavity by the adjusting cylinder, thereby realizing the extension and retraction of the supporting leg.

[0022] The distance adjusting mechanism includes a connecting rod and a telescopic rod. One end of the connecting rod is connected to the supporting leg. The telescopic rod is arranged in the connecting rod. One end of the telescopic rod is connected to the supporting leg. A sliding member is rotatably installed on the other end of the telescopic rod. A rotating wheel is installed on the sliding member. The connecting rod is provided with a sliding groove. The sliding groove is provided with a limiting groove. The limiting member is provided with a first slot and a second slot. The telescopic rod is provided with a limiting member. When the limiting member is located in the first slot, the rotating wheel is limited in the limiting groove. When the limiting member is located in the second slot, the rotating wheel slides along the sliding groove.

[0023] Furthermore, the lifting mechanism includes a mounting platform, a screw lifting device and a lifting platform. The mounting platform is mounted on the lower supporting platform, the screw lifting device is arranged on the mounting platform, and the lifting platform is mounted on the screw lifting device. The lifting of the lifting platform is controlled by the screw lifting device.

[0024] The screw lifting device includes a driving motor, a rotating shaft, a threaded rod and a rotating gear. The rotating shaft is connected to the output end of the driving motor through a coupling. The rotating gear is sleeved on the threaded rod. The threaded rod passes through the mounting platform. The rotating shaft is provided with a tooth portion. The rotating shaft meshes with the rotating gear through the tooth portion. A mounting seat is installed at the end of the threaded rod, and the lifting platform is installed on the mounting seat.

[0025] Furthermore, the lattice support seat includes a support unit and a support plate. A plurality of support units are provided, and the plurality of support units are stacked in sequence. The support plate is installed on the support unit located at the top. The support unit is provided with a flange plate. The plurality of support units are installed and fixed by means of the flange plate. The support unit is provided with a reinforcing rib, and the reinforcing rib is used to strengthen the strength of the support unit.

[0026] Furthermore, the upper support platform is installed on the lattice support seat, and multiple upper support platforms are provided. The upper support platform on one side is provided with a pad, and the pad is used to increase the height of the upper support platform.

[0027] The upper supporting platform includes a mounting plate, an adjusting plate, an adjusting seat and a supporting platform 1. The adjusting plate is fixedly mounted on the mounting plate. The mounting plate is provided with a supporting rod. The adjusting seat is rotatably arranged on the supporting rod. The adjusting plate is provided with an adjusting hole. There are multiple adjusting holes. The adjusting seat is provided with a fixing hole. The adjusting hole and the fixing hole are fixed by bolts. The adjusting seat and the supporting platform 1 are provided with a flange 2. The supporting platform 1 and the adjusting seat are fixedly connected by the flange 2.

[0028] A reinforcing plate 1 is also provided between the adjusting plate and the mounting plate, and the reinforcing plate 1 is used to increase the connection strength between the adjusting plate and the mounting plate.

[0029] Furthermore, the supporting mechanism is installed on the lattice supporting seat, and the supporting mechanism includes an angle adjustment mechanism, a supporting base, a supporting vertical plate and a second supporting platform. The supporting vertical plate is fixedly installed on the supporting base, and a reinforcing plate second is installed between the supporting vertical plate and the supporting base. The reinforcing plate second is used to increase the connection strength between the supporting base and the supporting vertical plate. The angle adjustment mechanism is connected to the second supporting platform, and the second supporting platform is rotatably connected to the supporting base. The angle adjustment mechanism is used to control the inclination of the second supporting platform.

[0030] Furthermore, the angle adjustment mechanism includes a pushing cylinder, a hinge is installed on the lattice support seat, one end of the pushing cylinder is hinged to the hinge, the support platform two is provided with a connecting plate, the output end of the pushing cylinder is hinged to the connecting plate, and the support platform two is pushed to tilt by the pushing cylinder, the support vertical plate is installed with a connecting shaft, the support platform two is provided with a connecting groove, the connecting shaft is inserted into the connecting groove, a groove is opened in the connecting groove, the connecting shaft is provided with a limiting wheel, the limiting wheel is limited in the groove, and the limiting wheel slides along the groove.

[0031] The present invention has the following beneficial effects due to the adoption of the above technical solution:

[0032] The present invention assembles the first section truss and the second section truss in the truss assembly area through the above method, and then respectively sets up the first section temporary support structure and the second section temporary support structure composed of a lower support platform, a lifting mechanism, a lattice support seat and an upper support platform between the seismic isolation layer and the pool seat, and between the pool seat and the building seat, and sets up the third section temporary support structure composed of a lower support platform, a lifting mechanism, a lattice support seat and a support mechanism on the building seat, and then hoists the first section truss and the second section truss respectively, and supports them through the support mechanism, so that the temporary support structure can adapt to the stepped stands through the lower support platform, and the temporary support structure can be reversed through the upper support platform, thereby solving the problem that the temporary support structure is inconvenient to set up.

[0033] In the present invention, after the first section of the truss is hoisted onto the temporary support structure, a guy rope is pulled on the first section of the truss, and the first section of the truss is stabilized by the guy rope, thereby ensuring the stability of the first section of the truss on the temporary support structure, avoiding falling, and increasing construction safety. After the second section of the truss is hoisted onto the temporary support structure, a circular tube support is set on the other end of the second section of the truss, and the stability of the second section of the truss is increased by the circular tube support, thereby facilitating the fixed connection between the first section of the truss and the second section of the truss.

[0034] In the present invention, the lower supporting platform is installed in the supporting leg by an adjusting cylinder, and the extension and retraction of the connecting supporting legs are driven by the extension and retraction of the adjusting cylinder, so that the supporting legs can adapt to the stepped tilting state. At the same time, a distance adjusting mechanism is provided between the supporting legs on both sides, and the distance between the supporting legs on both sides is adjusted by the distance adjusting mechanism, which is convenient for adapting to the width of different steps and facilitating the erection of the lower supporting platform.

[0035] In the present invention, a pair of support platforms are used to reverse the bottom plate of the pool seat and the bottom plate of the building seat. The support platform one is connected to the adjustment seat. The adjustment seat is provided with a fixing hole, and the adjustment plate is provided with a plurality of adjustment holes. The inclination of the support platform one is achieved by fixing the fixing hole with different adjustment holes, so that the inclination angle of the support platform one can be consistent with the inclination angle of the bottom plates of the pool seat and the building seat, thereby achieving a reverse-top effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention will be further described below in conjunction with the accompanying drawings:

[0037] Figure 1 It is a structural schematic diagram of the first section of the temporary support structure of the present invention;

[0038] Figure 2 It is a structural schematic diagram of the third section of the temporary support structure of the present invention;

[0039] Figure 3 It is a structural schematic diagram of the lower support platform and the mounting platform in the present invention;

[0040] Figure 4 This is an exploded structural diagram of the support leg in the present invention;

[0041] Figure 5 It is an exploded structural diagram of the distance adjustment mechanism in the present invention;

[0042] Figure 6 The motion state of the distance adjustment mechanism in the present invention is Figure 1 ;

[0043] Figure 7 The motion state of the distance adjustment mechanism in the present invention is Figure 2 ;

[0044] Figure 8 The motion state of the distance adjustment mechanism in the present invention is Figure 3 ;

[0045] Fig. 9 It is a structural schematic diagram of the lifting mechanism in the present invention;

[0046] Fig.10 It is a structural schematic diagram of the screw lifting device in the present invention;

[0047] Fig.11 It is a structural schematic diagram of the lattice support seat in the present invention;

[0048] Fig.12 It is a structural schematic diagram of the support mechanism in the present invention;

[0049] Fig.13 It is an exploded structural diagram of the support mechanism in the present invention;

[0050] Fig.14 It is a structural schematic diagram of the upper support platform in the present invention;

[0051] Fig.15 It is an exploded structural diagram of the upper supporting platform in the present invention;

[0052] Fig.16 It is a structural schematic diagram of the assembled tire frame in the present invention;

[0053] Fig.17 It is a construction plan of the present invention;

[0054] Fig.18 It is a construction stereogram of the present invention;

[0055] Fig.19 The assembly process of the first truss section and the second truss section in the present invention is as follows Figure 1 ;

[0056] Fig. 20 The assembly process of the first truss section and the second truss section in the present invention is as follows Figure 2 ;

[0057] Fig.21 The assembly process of the first truss section and the second truss section in the present invention is as follows Figure 3 ;

[0058] Fig. 22 The assembly process of the first truss section and the second truss section in the present invention is as follows Figure 4 .

[0059] In the figure: 10-assembly tire frame; 11-tire frame bottom plate; 12-tire frame legs; 13-tire frame crossbeam; 20-lower support platform; 21-support legs; 211-inner cavity; 212-adjusting cylinder; 213-connecting legs; 22-installation platform; 23-distance adjustment mechanism; 231-connecting rod; 232-telescopic rod; 233-sliding member; 234-rotating wheel; 235-sliding groove; 236-limiting groove; 237-first slot; 238-second slot; 239-limiting member; 30-lifting mechanism; 31-installation platform; 32-lifting platform; 33-screw lifting device; 331-driving motor; 332-rotating shaft; 333-threaded rod; 334-rotating gear; 335-coupling; 336-tooth portion; 337-mounting seat; 40-lattice support seat; 41-support unit; 42-support plate; 43-flange plate 1; 44-strengthening rib; 50-upper support platform; 51-pad; 52-mounting plate; 53-adjusting plate; 54-adjusting seat; 55-support platform 1; 56-support rod; 57-adjusting hole; 58-fixing hole; 59-flange plate 2; 510-strengthening plate 1;

[0060] 60-support mechanism; 61-support base; 62-support vertical plate; 63-support platform 2; 64-reinforcement plate 2; 65-angle adjustment mechanism; 651-pushing cylinder; 652-hinge; 653-connecting plate; 654-connecting shaft; 655-connecting groove; 656-groove; 657-limiting wheel. DETAILED DESCRIPTION

[0061] like Figures 1 to 22 As shown, a steel truss construction method of the present invention comprises the following steps:

[0062] S1. A truss assembly area is set up, and the trusses are assembled in the truss assembly area. After the assembly is completed, the first truss section and the second truss section are formed. The assembly process of the first truss section and the second truss section is as follows: Figures 19 to 22 shown.

[0063] a. First, use a total station to place the axis of the unit to be assembled in the truss assembly area, and then place the assembly frame 10 according to the axis position of the truss;

[0064] b. Then, assemble the first section of the truss, hoist the chord of the first section of the truss onto the assembly frame 10, support it through the assembly frame 10, and then install the web between the chords, and fix the chord and the web to achieve the assembly of the first section of the truss;

[0065] c. Finally, assemble the second section of the truss. Hoist the chord of the second section of the truss onto the assembly frame 10, support it through the assembly frame 10, and then install the web between the chords. The chord and the web are fixedly installed, thereby realizing the assembly of the second section of the truss.

[0066] The assembled tire frame 10 includes a tire frame base plate 11, tire frame legs 12 and a tire frame cross beam 13. The tire frame legs 12 and the tire frame cross beam 13 are both made of I-beams to ensure that the assembled tire frame 10 has sufficient strength to support the truss. The tire frame legs 12 are fixedly mounted on the tire frame base plate 11, and the tire frame cross beam 13 is mounted on the tire frame legs 12. When the truss is assembled, the truss is supported on the tire frame cross beam 13, and the tire frame legs 12 are in an inverted "V" structure. This design increases the stability of the support of the assembled tire frame 10.

[0067] S2. Set up a temporary support structure. The temporary support structure includes a lower support platform 20, a lifting mechanism 30, a lattice support seat 40, an upper support platform 50 and a support mechanism 60. When setting up the temporary support structure, it needs to be set up in three sections on the same horizontal projection plane. The first section of the temporary support structure and the second section of the temporary support structure are both composed of the lower support platform 20, the lifting mechanism 30, the lattice support seat 40 and the upper support platform 50. The third section of the temporary support structure is composed of the lower support platform 20, the lifting mechanism 30, the lattice support seat 40 and the support mechanism 60;

[0068] S3. Determine the connection position of the first section truss and the second section truss after installation according to the design drawings, set up a temporary support structure at the position corresponding to the connection position, the connection point of the first section truss and the second section truss is supported on the temporary support structure, and the first section truss and the second section truss are supported by the temporary support structure. The first section temporary support structure is arranged on the top plate of the seismic isolation layer through the lower support platform 20, and the upper support platform 50 of the first section temporary support structure is against the bottom plate of the pool seat. The second section temporary support structure is arranged on the top plate of the pool seat through the lower support platform 20, and the upper support platform 50 of the second section temporary support structure is against the building seat. The third section temporary support structure is arranged on the top plate of the building seat through the lower support platform 20, and one end of the connection between the first section truss and the second section truss is supported on the support mechanism 60 of the third section temporary support structure, and is supported by the support mechanism 60;

[0069] S4. After the temporary support structure is erected, the first section of the truss is hoisted first, with one end of the first section of the truss supported on the first structural support and the other end supported on the temporary support structure. Then the second section of the truss is hoisted, with one end of the second section of the truss supported on the temporary support structure and the middle part of the second section of the truss supported on the second structural support, thus achieving the hoisting of the first section of the truss and the second section of the truss;

[0070] like Fig.18 As shown, in step S4, when the first section of the truss is hoisted onto the structural support one and the temporary support structure, two guy ropes need to be symmetrically pulled, and the pulling angle of the guy ropes is controlled according to 45°-60°, and the guy ropes are pulled according to the truss installation construction sequence to avoid affecting the installation construction. One end of the guy rope is pulled nearby on the concrete shear wall or the floor of the building, and the other end is pulled at the upper chord node of the truss. The first section of the truss is stabilized by pulling the guy ropes to prevent the first section of the truss from falling. When the second section of the truss is hoisted onto the structural support two and the temporary support structure, a circular tube support needs to be erected, and the other end of the second section of the truss is supported on the circular tube support. The circular tube support increases the stability of the second section of the truss to prevent the second section of the truss from falling. The circular tube support is also provided with an inclined support tube, and the circular tube support is fixed by the inclined support tube.

[0071] S5. After the first truss section and the second truss section are hoisted, their connection positions are connected and fixed, and then one end of the first truss section is welded and fixed to the first structural support, and the middle part of the second truss section is welded and fixed to the second structural support, thereby completing the installation of a single truss;

[0072] S6. After the installation of the first and second trusses is completed, the temporary support structure and the wind ropes are removed;

[0073] S7. Repeat steps S3-S5 to complete the installation of the steel truss.

[0074] The present invention, through the above-mentioned method steps, first assembles the first section truss and the second section truss in the truss assembly area, and then respectively sets up the first section temporary support structure and the second section temporary support structure consisting of the lower support platform 20, the lifting mechanism 30, the lattice support seat 40 and the upper support platform 50 between the seismic isolation layer and the pool seat, and between the pool seat and the building seat, and sets up the third section temporary support structure consisting of the lower support platform 20, the lifting mechanism 30, the lattice support seat 40 and the support mechanism 60 on the building seat, and then hoists the first section truss and the second section truss respectively, and supports them by the support mechanism 60, and the lower support platform 20 facilitates the temporary support structure to adapt to the stepped stands, and the upper support platform 50 facilitates the temporary support structure to be reversed, thereby solving the problem of inconvenient erection of the temporary support structure, and finally the first section truss and the second section truss are connected and fixed to complete the hoisting construction of a single truss, and the construction steps are repeated to complete the construction of the overall truss.

[0075] like Figures 3 to 5 As shown, the lower supporting platform 20 includes a retractable supporting leg 21, a distance adjusting mechanism 23 and an installation platform 22. The installation platform 22 is installed on the supporting leg 21. The installation platform 22 is used to install the lifting mechanism 30. The connection and fixation between the lower supporting platform 20 and the lifting mechanism 30 are completed by the installation platform 22. The adjustment mechanism is installed between the two supporting legs 21. The distance adjusting mechanism 23 is used to adjust the distance between the two supporting legs 21. According to different actual construction sites, the width and height of the steps of the building and the pool seat may be different. By adjusting the distance between the two supporting legs 21 through the distance adjusting mechanism 23, it is possible to adapt to more construction scenes and control costs. The supporting legs 21 are retractable and can adapt to steps of different heights. In this embodiment, the supporting legs 21 on one side can be set to be non-retractable, and the supporting legs 21 on the other side can be set to be retractable. Since the steps are usually from low to high, the non-retractable side can be supported on a higher step, and the retractable side can be supported on a lower step. This design facilitates the erection of the lower supporting platform 20, thereby facilitating the erection of a temporary supporting structure.

[0076] The supporting leg 21 is provided with an inner cavity 211, in which an adjusting cylinder 212 is installed, and the output end of the adjusting cylinder 212 is connected to a connecting leg 213, and the connecting leg 213 is pushed by the adjusting cylinder 212 to move along the inner cavity 211, thereby realizing the extension and retraction of the supporting leg 21, and when the adjusting cylinder 212 is fully retracted, the bottom end of the connecting leg 213 is level with the bottom end of the supporting leg 21 on the other side, so that the lower supporting platform 20 can be in a horizontal state.

[0077] The distance adjustment mechanism 23 includes a connecting rod 231 and a telescopic rod 232. One end of the connecting rod 231 is connected to the supporting leg 21. The telescopic rod 232 is arranged in the connecting rod 231. One end of the telescopic rod 232 is connected to the supporting leg 21. The other end of the telescopic rod 232 is rotatably installed with a sliding member 233. The sliding member 233 is installed with a rotating wheel 234. The connecting rod 231 is provided with a sliding groove 235. The sliding groove 235 is provided with a limiting groove 236. The limiting member 239 is provided with a first slot 237 and a second slot 238. The telescopic rod 232 is provided with a limiting member 239. When the limiting member 239 is located in the first slot 237, the rotating wheel 234 is limited in the limiting slot 236. When the limiting member 239 is located in the second slot 238, the rotating wheel 234 can slide along the sliding groove 235.

[0078] like Figures 6 to 8 As shown, this is a motion state of the distance adjustment mechanism 23. When the rotating wheel 234 is located in the limiting groove 236, the limiting member 239 is located in the first slot 237, and the telescopic rod 232 is limited so that the telescopic rod 232 maintains the existing state. When the distance between the support legs 21 needs to be adjusted, the support legs 21 on both sides are pulled, and the sliding member 233 rotates to make the rotating wheel 234 disengage from the limiting groove 236. When the distance is adjusted to an appropriate distance, the rotating wheel 234 is limited in the corresponding limiting groove 236. When the sliding member 233 rotates to limit the rotating wheel 234 in different limiting grooves 236, the limiting member 239 is always located in the first slot 237. When the telescopic rod 232 needs to be retracted into the connecting rod 231, the telescopic rod 232 is pulled to the far right, as shown in FIG. Figure 7 As shown, at this time, the limiting wheel 657 is disengaged from the limiting groove 236 and the limiting member 239 is inserted into the second slot 238, so that the sliding member 233 stops rotating, and then the telescopic rod 232 is retracted. When retracted to the leftmost side, as shown in FIG. Figure 8 As shown, due to the inclined surface on the left side, the limiting member 239 is disengaged from the second slot 238 and returned to the first slot 237, the sliding member 233 resumes rotation, and the rotating wheel 234 is limited in the first limiting slot 236 on the left side, thereby completing the entire movement state.

[0079] In the present invention, the lower supporting platform 20 is installed in the supporting leg 21 by an adjusting cylinder 212. The extension and retraction of the adjusting cylinder 212 drives the extension and retraction of the connecting leg 213, so that the supporting leg 21 can adapt to the stepped tilting state. At the same time, a distance adjusting mechanism 23 is provided between the supporting legs 21 on both sides. The distance between the supporting legs 21 on both sides is adjusted by the distance adjusting mechanism 23, which is convenient for adapting to the width of different steps and facilitating the erection of the lower supporting platform 20.

[0080] The lifting mechanism 30 includes a mounting platform 31, a screw lifting device 33 and a lifting platform 32. The mounting platform 31 is mounted on the lower supporting platform 20, the screw lifting device 33 is arranged on the mounting platform 31, and the lifting platform 32 is mounted on the screw lifting device 33. The lifting and lowering of the lifting platform 32 is controlled by the screw lifting device 33. During actual construction, there may be a certain height difference between the upper supporting platform 50 of the first section temporary supporting structure and the bottom plate of the pool seat, between the upper supporting platform 50 of the second section temporary supporting structure and the floor of the building, and between the supporting mechanism 60 of the third section temporary supporting structure and the first section truss and the second section truss. When this height difference is relatively small, adding or reducing the supporting unit 41 will cause the height difference to become larger. Therefore, by providing a lifting mechanism 30 to adjust the height a little, the temporary supporting structure can meet more construction scenarios.

[0081] The screw lifting device 33 includes a driving motor 331, a rotating shaft 332, a threaded rod 333 and a rotating gear 334. The rotating shaft 332 is connected to the output end of the driving motor 331 through a coupling 335. The rotating gear 334 is sleeved on the threaded rod 333. The threaded rod 333 passes through the mounting platform 31. The rotating shaft 332 is provided with a tooth portion 336. The rotating shaft 332 is meshed with the rotating gear 334 through the tooth portion 336. The end of the threaded rod 333 is installed with a mounting seat 337. 32 is installed on the mounting base 337. This structure drives the rotating shaft 332 to rotate through the driving motor 331. Since the rotating shaft 332 is provided with a tooth portion 336, the tooth portion 336 is engaged with the rotating gear 334. During the rotation of the rotating shaft 332, the tooth portion 336 drives the rotating gear 334 to rotate. The rotating gear 334 is sleeved on the threaded rod 333. The rotation of the rotating gear 334 will drive the threaded rod 333 to rise and fall, thereby realizing the lifting and lowering of the lifting platform 32 and achieving the effect of adjusting the height.

[0082] The lattice support seat 40 includes a support unit 41 and a support plate 42. A plurality of support units 41 are provided, and the plurality of support units 41 are stacked in sequence. Different numbers of support units 41 are stacked according to different construction heights. The support plate 42 is installed on the support unit 41 located at the top. The support unit 41 is provided with a flange 43. The plurality of support units 41 are installed and fixed by means of the flange 43. The structure is simple, and the installation and fixation between the two support units 41 is convenient, which increases construction efficiency and saves construction time. The support unit 41 is provided with a reinforcing rib 44, and the reinforcing rib 44 is used to strengthen the strength of the support unit 41 and ensure construction safety.

[0083] like Figure 1As shown, the upper support platform 50 is installed on the support plate 42 of the lattice support seat 40. The upper support platform 50 is used to reverse the bottom plate of the pool seat and the bottom plate of the building seat to avoid excessive pressure on the building seat and the pool seat during construction and causing collapse. There are multiple upper support platforms 50. In this embodiment, there are four upper support platforms 50. The four upper support platforms 50 are arranged in pairs on both sides. Since the bottom plates of the pool seat and the building seat are usually in an inclined state, the reverse heights of the upper support platforms 50 on both sides are different. Therefore, a pad 51 is provided at the bottom of the upper support platform 50 on one side. The pad 51 is used to increase the height of the upper support platform 50 on one side. According to the actual construction status, pads 51 of different heights are set.

[0084] like Fig.14 and Fig.15 As shown, the upper supporting platform 50 includes a mounting plate 52, an adjusting plate 53, an adjusting seat 54 and a supporting platform 1 55. The mounting plate 52 is fixedly mounted on the supporting plate 42, the adjusting plate 53 is fixedly mounted on the mounting plate 52, a supporting rod 56 is provided between the two mounting plates 52, the adjusting seat 54 is rotatably set on the supporting rod 56, the adjusting plate 53 is provided with an adjusting hole 57, and there are multiple adjusting holes 57. The adjusting seat 54 is provided with a fixing hole 58, and the adjusting hole 57 is fixed to the fixing hole 58 by bolts. Through the fixation between the fixing hole 58 and different adjusting holes 57, the supporting platform 1 55 can be tilted at different angles, so that the supporting platform 1 55 can be consistent with the inclination angle of the pool seat and the floor plate, thereby achieving a better anti-top effect. The adjusting seat 54 and the supporting platform 1 55 are provided with a flange 2 59, and the supporting platform 1 55 is fixedly connected to the adjusting seat 54 by the flange 2 59. The structure is simple and easy to install.

[0085] A reinforcing plate 510 is further provided between the adjusting plate 53 and the mounting plate 52. The reinforcing plate 510 is used to increase the connection strength between the adjusting plate 53 and the mounting plate 52, thereby increasing the structural strength of the upper supporting platform 50 and increasing the safety of use.

[0086] In the present invention, the bottom plate of the pool seat and the bottom plate of the building seat are reversed by a support platform 55, and the support platform 55 is connected to an adjustment seat 54, and the adjustment seat 54 is provided with a fixing hole 58, and the adjustment plate 53 is provided with a plurality of adjustment holes 57. The inclination of the support platform 55 is achieved by fixing the fixing hole 58 with different adjustment holes 57, so that the inclination angle of the support platform 55 can be consistent with the inclination angle of the bottom plates of the pool seat and the building seat, thereby achieving a reverse-top effect.

[0087] like Figure 12 to Figure 13As shown, the support mechanism 60 is installed on the support plate 42 of the lattice support seat 40, and the support mechanism 60 is against the ends of the first section truss and the second section truss to support the first section truss and the second section truss. The support mechanism 60 includes an angle adjustment mechanism 65, a support base 61, a support vertical plate 62 and a second support platform 63. The support base 61 is fixedly installed on the support plate 42, and the support vertical plate 62 is fixedly installed on the support base 61. A second reinforcing plate 64 is installed between the support vertical plate 62 and the support base 61. The second reinforcing plate 64 is used to increase the support base 61 The connection strength between the support vertical plate 62 increases the overall structural strength of the support mechanism 60. The support platform 2 63 is rotatably connected to the support base 61. The angle adjustment mechanism 65 is connected to the support platform 2 63. The angle adjustment mechanism 65 is used to control the inclination of the support platform 2 63. Since the truss structure is a spatial structure, when the truss structure is supported on the support platform 2 63, it will be tilted at a certain angle. In order to adapt to the truss structure, the support platform 2 63 is tilted by providing an angle adjustment mechanism 65 to match the support platform 2 63 with the truss structure.

[0088] The angle adjustment mechanism 65 includes a pushing cylinder 651, a hinge 652 is installed on the lattice support seat 40, one end of the pushing cylinder 651 is hinged to the hinge 652, the support platform 2 63 is provided with a connecting plate 653, the output end of the pushing cylinder 651 is hinged to the connecting plate 653, and the support platform 2 63 is tilted by pushing the cylinder 651, the support vertical plate 62 is installed with a connecting shaft 654, the support platform 2 63 is provided with a connecting groove 655, the connecting shaft 654 is inserted into the connecting groove 655, a groove 656 is opened in the connecting groove 655, the connecting shaft 654 is provided with a limiting wheel 657, the limiting wheel 657 is limited in the groove 656, the limiting wheel 657 slides along the groove 656, and in the process of the pushing cylinder 651 pushing the support platform 2 63 to rotate, it now moves along the groove 656.

[0089] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention to solve basically the same technical problems and achieve basically the same technical effects are all included in the protection scope of the present invention.

Claims

1. A steel truss construction method, characterized in that The following steps are involved: S1. Establish a truss assembly area, assemble the trusses in the truss assembly area, and form the first truss section and the second truss section after the assembly is completed; S2. Set up a temporary support structure. The temporary support structure includes a lower support platform, a lifting mechanism, a lattice support seat, an upper support platform and a support mechanism. When setting up a temporary support structure, it needs to be set up in three sections on the same horizontal projection plane. The first section of the temporary support structure and the second section of the temporary support structure are both composed of a lower support platform, a lifting mechanism, a lattice support seat and an upper support platform. The third section of the temporary support structure is composed of a lower support platform, a lifting mechanism, a lattice support seat and a support mechanism. S3. Determine the connection position of the first truss section and the second truss section after installation according to the design drawings, set up a temporary support structure at the position corresponding to the connection position, the connection point of the first truss section and the second truss section is supported on the temporary support structure, the first truss section and the second truss section are supported by the temporary support structure, the first temporary support structure is set on the top plate of the seismic isolation layer through the lower support platform, the upper support platform of the first temporary support structure is against the bottom plate of the pool seat, the second temporary support structure is set on the top plate of the pool seat through the lower support platform, the upper support platform of the second temporary support structure is against the building seat, the third temporary support structure is set on the top plate of the building seat through the lower support platform, one end of the connection between the first truss section and the second truss section is supported on the support mechanism of the third temporary support structure, and supported by the support mechanism; S4. After the temporary support structure is erected, the first section of the truss is hoisted first, with one end of the first section of the truss supported on the first structural support and the other end supported on the temporary support structure. Then the second section of the truss is hoisted, with one end of the second section of the truss supported on the temporary support structure and the middle part of the second section of the truss supported on the second structural support, thus achieving the hoisting of the first section of the truss and the second section of the truss; S5. After the first truss section and the second truss section are hoisted, their connection positions are connected and fixed, and then one end of the first truss section is welded and fixed to the first structural support, and the middle part of the second truss section is welded and fixed to the second structural support, thereby completing the installation of a single truss; S6. After the installation of the first and second trusses is completed, the temporary support structure and the wind ropes are removed; S7. Repeat steps S3-S5 to complete the installation of the steel truss.

2. A steel truss construction method according to claim 1, characterized in that The detailed steps of step S1 are: a. First, use the total station to place the axis of the unit to be assembled in the truss assembly area, and then place the assembly frame according to the axis position of the truss; b. Then assemble the first section of the truss, hoist the chord of the first section of the truss onto the assembly frame, support it through the assembly frame, and then install the web between the chords, and fix the chord and the web to achieve the assembly of the first section of the truss; c. Finally, assemble the second section of the truss. Hoist the chord of the second section of the truss onto the assembly frame, support it with the assembly frame, and then install the web between the chords. The chord and the web are fixedly installed, thereby realizing the assembly of the second section of the truss.

3. A steel truss construction method according to claim 2, characterized in that: The assembled tire frame includes a tire frame bottom plate, tire frame legs and a tire frame cross beam. The tire frame legs are fixedly mounted on the tire frame bottom plate, and the tire frame cross beam is mounted on the tire frame legs. When assembling the truss, the truss is supported on the tire frame cross beam, and the tire frame legs are in an inverted "V" structure to increase support stability.

4. A steel truss construction method according to claim 1, characterized in that: In step S4, when the first section of the truss is hoisted onto the structural support one and the temporary support structure, it is necessary to pull the guy rope to stabilize the first section of the truss to prevent it from falling. When the second section of the truss is hoisted onto the structural support two and the temporary support structure, it is necessary to set up a circular tube support. The other end of the second section of the truss is supported on the circular tube support. The circular tube support increases the stability of the second section of the truss to prevent it from falling. The circular tube support is also provided with an inclined support tube, which is used to fix the circular tube support.

5. A steel truss construction method according to claim 1, characterized in that: The lower support platform includes a retractable support leg and a distance adjustment mechanism, the distance adjustment mechanism is used to adjust the distance between the two support legs, the support leg is also provided with a mounting platform, the mounting platform is used to install the lifting mechanism; the support leg is provided with an inner cavity, an adjusting cylinder is installed in the inner cavity, the output end of the adjusting cylinder is connected to a connecting leg, and the connecting leg is pushed by the adjusting cylinder to move along the inner cavity, thereby realizing the extension and retraction of the support leg; The distance adjustment mechanism includes a connecting rod and a telescopic rod, one end of the connecting rod is connected to the supporting leg, the telescopic rod is arranged inside the connecting rod, one end of the telescopic rod is connected to the supporting leg, the other end of the telescopic rod is rotatably installed with a sliding member, the sliding member is installed with a rotating wheel, the connecting rod is provided with a sliding groove, the sliding groove has a limiting groove, the limiting member has a first slot and a second slot, the telescopic rod is provided with a limiting member, when the limiting member is located in the first slot, the rotating wheel is limited in the limiting groove, when the limiting member is located in the second slot, the rotating wheel slides along the sliding groove.

6. A steel truss construction method according to claim 1, characterized in that: The lifting mechanism comprises a mounting platform, a screw lifting device and a lifting platform, wherein the mounting platform is mounted on the lower supporting platform, the screw lifting device is arranged on the mounting platform, the lifting platform is mounted on the screw lifting device, and the lifting of the lifting platform is controlled by the screw lifting device; The screw lifting device includes a driving motor, a rotating shaft, a threaded rod and a rotating gear. The rotating shaft is connected to the output end of the driving motor through a coupling. The rotating gear is sleeved on the threaded rod. The threaded rod passes through the mounting platform. The rotating shaft is provided with a tooth portion. The rotating shaft meshes with the rotating gear through the tooth portion. A mounting seat is installed at the end of the threaded rod, and the lifting platform is installed on the mounting seat.

7. A steel truss construction method according to claim 1, characterized in that: The lattice support seat includes a support unit and a support plate. The support units are provided in plurality and the plurality of support units are stacked in sequence. The support plate is installed on the support unit located at the top. The support unit is provided with a flange plate 1, and the plurality of support units are installed and fixed by means of the flange plate 1. The support unit is provided with a reinforcing rib, and the reinforcing rib is used to strengthen the strength of the support unit.

8. A steel truss construction method according to claim 1, characterized in that: The upper support platform is installed on the lattice support seat, and the upper support platform is provided with a plurality of them. The upper support platform on one side is provided with a pad, and the pad is used to increase the height of the upper support platform; The upper supporting platform comprises a mounting plate, an adjusting plate, an adjusting seat and a supporting platform 1, wherein the adjusting plate is fixedly mounted on the mounting plate, the mounting plate is provided with a supporting rod, the adjusting seat is rotatably arranged on the supporting rod, the adjusting plate is provided with an adjusting hole, and a plurality of adjusting holes are provided, the adjusting seat is provided with a fixing hole, and the adjusting hole and the fixing hole are fixed by bolts, the adjusting seat and the supporting platform 1 are provided with a flange 2, and the supporting platform 1 is fixedly connected to the adjusting seat by the flange 2; a reinforcing plate 1 is also provided between the adjusting plate and the mounting plate, and the reinforcing plate 1 is used to increase the connection strength between the adjusting plate and the mounting plate.

9. A steel truss construction method according to claim 1, characterized in that: The support mechanism is installed on the lattice support seat, and the support mechanism includes an angle adjustment mechanism, a support base, a support vertical plate and a second support platform. The support vertical plate is fixedly installed on the support base, and a second reinforcement plate is installed between the support vertical plate and the support base. The second reinforcement plate is used to increase the connection strength between the support base and the support vertical plate. The angle adjustment mechanism is connected to the second support platform, and the second support platform is rotatably connected to the support base. The angle adjustment mechanism is used to control the inclination of the second support platform.

10. A steel truss construction method according to claim 9, characterized in that: The angle adjustment mechanism includes a pushing cylinder, a hinge is installed on the lattice support seat, one end of the pushing cylinder is hinged to the hinge, the support platform 2 is provided with a connecting plate, the output end of the pushing cylinder is hinged to the connecting plate, and the support platform 2 is pushed to tilt by the pushing cylinder, the support vertical plate is installed with a connecting shaft, the support platform 2 is provided with a connecting groove, the connecting shaft is inserted into the connecting groove, a groove is opened in the connecting groove, the connecting shaft is provided with a limiting wheel, the limiting wheel is limited in the groove, and the limiting wheel slides along the groove.

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