Temporary supporting device for over-limit span truss floor support plate and using method

Abstract

The invention discloses a temporary supporting device for an over-limit span truss floor support plate and a using method, and belongs to the technical field of building construction, the whole supporting system adopts a reverse string form, pre-arching is achieved by increasing the length of reverse string steel bars between fulcrums, a supporting plate system is arranged at the top of an arch, and a truss floor is supported through a supporting plate. According to the whole system, the load of the truss plate is converted into the pressure stress of the chord member through the supporting plate, the pressure stress is transmitted to the structural frame at the position of the support, the scheme is used for achieving temporary supporting in steel structure span over-limit floor bearing plate construction, occupation of a bottom floor surface is avoided, meanwhile, multiple factors such as disassembly and assembly, adjustment and supporting point design are considered, and construction is convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, and in particular relates to a temporary support device for an over-limit span truss floor deck and a use method thereof. Background Art

[0002] At present, for truss floor decking with excessive steel structure span, disk-type or fastener-type steel pipes are basically used for temporary support. The steel pipe top support generally occupies the space of the bottom floor surface, affecting the subsequent construction wind direction; there are also truss forms, with both ends placed on the flanges of the steel beams on both sides, but the support system is complex in design and heavy, and is limited by the low flexibility of the span, which is not conducive to construction; there are also string-type support methods, with both ends placed on the flanges of the steel beams, and the chord steel bars are tensioned by increasing the deflection of the chord steel bars to obtain vertical support force, but the chord steel bars of this support method are in a tensile state, and the design of the support position is complex, and are generally welded to the steel beam. In addition, the chord steel bars are prone to lateral instability, and the vertical deflection of the chord steel bars is not convenient to adjust, and the installation flexibility is not high. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a temporary support device and a method of use for an over-span truss floor deck, which adopts an anti-tension chord to form a support system and converts the vertical load into the compressive stress of the anti-tension chord.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] The present invention includes a telescopic adjustment part fixed to the bottom ends of the flanges on both sides, a reverse-tensioned steel bar is commonly fixed between the two telescopic adjustment parts, and also includes a support plate system, the support plate system includes a support seat with a T-shaped cross-section, an opening is passed through the inside of the support seat, two upper rollers are rotatably provided inside the support seat, the reverse-tensioned steel bar passes through the through-hole of the support seat, the two upper rollers are supported on the upper side of the reverse-tensioned steel bar, the telescopic adjustment part is extended, so that the reverse-tensioned steel bar bends upward, so that the support seat rises with the reverse-tensioned steel bar and rests against the bottom side of the middle part of the support plate supported on the top of the flange.

[0006] Furthermore, the telescopic adjustment part includes a base, two ear plates are fixedly provided on the base, a rotating seat is provided between the two ear plates, the rotating seat and the ear plate are rotatably connected by inserting a pin shaft, a cylinder seat is fixedly provided on the side of the rotating seat, a steel sleeve is coaxially rotatably provided in the cylinder seat, the end of the steel sleeve is threadedly connected to the end of the anti-tensioning steel bar, a first motor is fixedly provided on one side of the cylinder seat, a first driving tooth is provided at the output end of the first motor, a first driven tooth meshing with the first driving tooth is coaxially fixedly provided on the outer side of the steel sleeve, and a first manual lever is also coaxially provided on the steel sleeve, and the anti-tensioning steel bar is bent upward by adjusting the first motor and the first manual lever.

[0007] Furthermore, an arc-shaped through groove surrounding the axis of the upper top roller is formed on the support seat, and a lower top roller is slidably arranged in the arc-shaped through groove. A stop seat is provided at the end of the support seat, and a clamping spring is connected between the stop seat and the end of the shaft rod of the lower top roller. As the anti-tensioning steel bar bends upward, the lower top roller moves along the arc-shaped through groove with the support of the clamping spring and is always supported on the lower side of the anti-tensioning steel bar.

[0008] Furthermore, a vertical slide groove is provided in the middle portion of the support seat, and a bottom limit roller is provided in the slide groove for vertical sliding. It also includes a U-shaped block which is vertically slidably arranged on the bottom side of the middle portion of the support seat, and both ends of the shaft rod of the bottom limit roller are respectively connected to the two ends of the U-shaped block, and the bottom side of the U-shaped block is threadedly connected with an adjusting stud, and the upper end of the adjusting stud is rotatably arranged on the bottom end of the support seat, and a second manual lever is fixedly provided on the end of the adjusting stud, and a second driven tooth is fixedly provided on the lower end of the adjusting stud, and a second motor is fixedly provided at the bottom end of the support seat, and a second active tooth which meshes with the second driven tooth is fixedly provided on the output end of the second motor, and the bottom limit roller is pressed against the lower side of the middle portion of the anti-tensioning steel bar by adjusting the second motor and the second manual lever.

[0009] Furthermore, a plurality of support tubes with closed bottoms are fixedly arranged on the top surface of the support seat, a slide column is coaxially slidably arranged at the bottom of the support tube, a support wheel is rotatably arranged at the top of the slide column, and a support spring is arranged between the support wheel and the bottom of the support tube.

[0010] A temporary support method for an over-limit span truss floor deck, using the above-mentioned temporary support device for an over-limit span truss floor deck, the steps of which are as follows:

[0011] S1. Prepare the anti-tensioning steel bars. Select HRB threaded steel bars with a diameter of about 20 mm. The length is determined according to the span of the truss floor deck and the height of the steel beam. The ends of the anti-tensioning steel bars are threaded to form threads. The thread length is slightly longer than the inner thread length of the steel casing.

[0012] S2. Pass the anti-tensioning steel bar through the support seat so that it is clamped between the grooves of the upper top roller and the lower top roller and located in the upper groove of the bottom limit roller. Then, the ends of the anti-tensioning steel bar are threadedly connected with the steel casings of the telescopic adjustment parts at both ends. The telescopic adjustment parts are adjusted manually or electrically so that the anti-tensioning steel bar is screwed to the root of the steel casing threads.

[0013] S3. Install the base on the inner side of the bottom flange of the steel beam, adjust the basket bolts on both sides, make the rotating seats at both ends of the anti-tensioning steel bar coincide with the ear plate rotating holes, insert the pin shaft to fix it, and complete the installation of the support system;

[0014] S4, pre-arching of the anti-tensioning string support system: rotate the steel sleeve to extend the anti-tensioning string reinforcement between the two fulcrums, rotate the adjustment stud, and move the top and bottom limit rollers to induce the anti-tensioning string reinforcement to arch upward;

[0015] S5. Lay the truss floor decking, and continue to rotate the steel sleeve and the bottom limit roller to support the support seat on the bottom side of the decking;

[0016] S6, carry out subsequent construction of truss floor decking and concrete;

[0017] S7. During dismantling, the adjusting cylinder is rotated in reverse manually or electrically to unload the counter-tensioning steel bars, the pin is pulled out, and the temporary counter-tensioning steel bars are removed to the ground. At the same time, the base is removed and returned to the warehouse or used in the next round of turnover after being sorted out.

[0018] The beneficial effects of the present invention are:

[0019] In the present invention, the entire support system adopts the form of anti-tensioned chords, and the anti-tensioned chord steel bars between the fulcrums are lengthened to make them pre-arched, and a support plate system is arranged on the top of the arch to support the truss floor through the support plate. The entire system converts the load of the truss plate into the compressive stress of the chord rod through the support plate and transmits it to the structural frame at the support position. This solution is used to solve the temporary support in the construction of the steel structure over-span floor deck, avoids the occupation of the bottom floor surface, and considers multiple factors such as disassembly, adjustment, and support point design to facilitate construction.

[0020] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0022] Figure 1 This is a schematic diagram of a temporary support device in a preparatory state according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the supporting state of the temporary supporting device according to an embodiment of the present invention;

[0024] Figure 3 for Figure 2 A sectional view of the

[0025] Figure 4 for Figure 2 Detailed diagram of point B;

[0026] Figure 5This is an overall schematic diagram of a pallet system according to an embodiment of the present invention;

[0027] The markings in the attached drawings are as follows: 1. telescopic adjustment part; 11. base; 12. ear plate; 13. rotating seat; 14. pin shaft; 15. cylinder seat; 16. steel casing; 161. first driven tooth; 17. first motor; 171. first driving tooth; 18. first manual puller; 2. anti-tensioning steel bar; 3. support plate system; 31. support seat; 311. arc-shaped through groove; 312. stop seat; 313. slide groove; 32. upper top roller; 33. lower top roller; 34. tightening spring; 35. bottom limit roller; 36. U-shaped block; 37. adjusting stud; 371. second manual puller; 372. second driven tooth; 38. second motor; 381. second driving tooth; 39. support cylinder; 391. slide column; 392. support wheel; 393. support spring. DETAILED DESCRIPTION

[0028] like Figure 1 to Figure 5 As shown, the present invention discloses a temporary support device for an over-limit span truss floor deck and a method of use, such as Figure 1 , Figure 2 and Figure 5 As shown, it includes a telescopic adjustment part 1 fixed to the bottom end of the flanges on both sides, a reverse-tensioned steel bar 2 is commonly fixed between the two telescopic adjustment parts 1, and also includes a support plate system 3, the support plate system 3 includes a support seat 31 with a T-shaped cross-section, the support seat 31 has an opening through the inside, and two upper rollers 32 are rotatably provided inside the support seat 31, the reverse-tensioned steel bar 2 passes through the through-hole of the support seat 31, and the two upper rollers 32 are supported on the upper side of the reverse-tensioned steel bar 2. The telescopic adjustment part 1 is extended to make the reverse-tensioned steel bar 2 bend upward, so that the support seat 31 rises with the reverse-tensioned steel bar 2 and rests on the bottom side of the middle part of the support plate supported on the top of the flange.

[0029] The entire support system of this structure adopts the form of anti-tensioned chords. The anti-tensioned chord steel bars 2 between the fulcrums are lengthened to make them pre-arched, and a pallet system 3 is arranged on the top of the arch to support the truss floor. The entire system converts the load of the truss plate into the compressive stress of the chord through the pallet and transmits it to the structural frame at the support position. This solution is used to solve the temporary support in the construction of the steel structure over-span floor slab, avoid occupying the bottom floor surface, and consider multiple factors such as disassembly, adjustment, and support point design to facilitate construction.

[0030] In a further solution, Figure 2 and Figure 4As shown, the telescopic adjustment part 1 includes a base 11, which is fixed to the bottom end of the flange by screws, and two parallel ear plates 12 are fixed on the base 11, and a rotating seat 13 is provided between the two ear plates 12, and the rotating seat 13 is rotatably connected to the ear plate 12 by inserting a pin shaft 14, and a cylinder seat 15 is fixed on the side of the rotating seat 13, and a steel sleeve 16 is coaxially rotatably provided in the cylinder seat 15, and the end of the steel sleeve 16 is threadedly connected to the end of the anti-tensioning steel bar 2, and a first motor 17 is fixed on one side of the cylinder seat 15, and a first active tooth 171 is provided at the output end of the first motor 17, and a first driven tooth 161 meshing with the first active tooth is coaxially fixed on the outer side of the steel sleeve 16, and a first manual puller 18 is also coaxially provided on the steel sleeve 16, and the anti-tensioning steel bar 2 is bent upward by adjusting the first motor 17 and the first manual puller 18.

[0031] In this scheme, the first motor 17 can be selected to drive or the first manual puller 18 can be manually pulled to rotate the steel casing 16 in the cylinder seat 15 to change the relative distance between the anti-tensioned steel bar 2 and the steel casing 16. The telescopic adjustment parts 1 at both ends are adjusted at the same time to make the anti-tensioned steel bar 2 bend and arch. This structure is provided with two adjustment modes. The motor drive is used to apply a large force to arch the steel bar, and the manual adjustment is used to make a subtle arch adjustment. This adjustment structure has high adjustment accuracy and is simple to operate.

[0032] In a further solution, Figure 3 and Figure 5 As shown, the support seat 31 is provided with an arc-shaped through groove 311 surrounding the axis of the upper top roller 32, and the lower top roller 33 is slidably arranged in the arc-shaped through groove 311. A stop seat 312 is provided at the end of the support seat 31, and a clamping spring 34 is connected between the stop seat 312 and the end of the shaft of the lower top roller 33. As the anti-tensioning steel bar 2 bends upward, the lower top roller 33 moves along the arc-shaped through groove 311 under the support of the clamping spring 34, and is always supported on the lower side of the anti-tensioning steel bar 2.

[0033] In this scheme, by setting a lower top roller 33 that slides elastically along the arc-shaped groove 311, the lower side of the upward arched anti-tensioned chord steel bar is supported at any time, so that the support plate system 3 can move with the upward arch of the anti-tensioned chord steel bar 2. The anti-tensioned chord steel bar 2 is clamped by the rollers on the upper and lower sides, which facilitates the positioning and movement of the support plate system 3.

[0034] In a further solution, Figure 3 and Figure 5As shown, a vertical sliding groove 313 is also provided in the middle of the support seat 31, and a bottom limiting roller 35 is vertically slidably provided in the sliding groove 313, and also includes a U-shaped block 36 vertically slidably provided on the bottom side of the middle part of the support seat 31, the two ends of the shaft rod of the bottom limiting roller 35 are respectively connected to the two ends of the U-shaped block 36, and the bottom side of the U-shaped block 36 is threadedly connected with an adjusting stud 37, the upper end of the adjusting stud 37 is rotatably arranged at the bottom end of the support seat 31, and a second manual puller 371 is fixedly provided at the end of the adjusting stud 37, and a second driven tooth 372 is fixedly provided at the lower end of the adjusting stud 37, and a second motor 38 is fixedly provided at the bottom end of the support seat 31, and a second active tooth 381 meshing with the second driven tooth 372 is fixedly provided at the output end of the second motor 38, and the bottom limiting roller 35 is pressed against the lower side of the middle part of the anti-tensioning steel bar 2 by adjusting the second motor 38 and the second manual puller 371.

[0035] This structure is used for the initial upward arching of the anti-string steel bar 2 in the preparatory state. By rotating the second motor 38 or the second manual puller 371, the bottom limit roller 35 pushes the anti-string steel bar 2 to make it arch upward, providing the anti-string steel bar 2 with an initial upward direction. It is also used to provide rigid support to the lower side of the anti-string steel bar 2 when the subsequent support plate system 3 supports the bearing plate.

[0036] In a further solution, Figure 2 As shown, a plurality of support tubes 39 with closed bottoms are fixedly provided on the top surface of the support seat 31, a slide column 391 is coaxially slidably provided at the bottom of the support tube 39, a support wheel 392 is rotatably provided at the top of the slide column 391, and a support spring 393 is provided between the support wheel 392 and the bottom of the support tube 39.

[0037] With the support of the support spring 393, the supporting force extends from the top surface of the support seat 31. When the support seat 31 moves upward, the support wheel 392 is first supported on the bottom side of the support plate. At this time, the position of the support seat 31 can be adjusted. The support seat 31 is moved along the anti-tensioning steel bar 2 to the top of the anti-tensioning steel bar 2, so that the support seat 31 is supported on the most stable support point. The support seat 31 is continued to be moved upward until the support seat 31 fits the support plate. This structure is conducive to adjusting the position of the support seat 31 and provides temporary support when adjusting the support seat 31 to avoid excessive swinging and position deviation of the support seat 31.

[0038] This invention also provides a temporary support method for an over-limit span truss floor deck, using the above-mentioned temporary support device for an over-limit span truss floor deck, and the steps are as follows:

[0039] S1, prepare the anti-tensioned steel bar 2, select HRB threaded steel bar with a diameter of about 20 mm, and the length is determined according to the span of the truss floor deck and the height of the steel beam. The ends of the anti-tensioned steel bar 2 are threaded to form threads, and the thread length is slightly longer than the inner thread length of the steel casing 16;

[0040] S2, pass the anti-tensioning steel bar 2 through the support seat 31, so that it is clamped between the grooves of the upper top roller 32 and the lower top roller 33, and is located in the upper groove of the bottom limit roller 35, and then the end of the anti-tensioning steel bar 2 is threadedly connected with the steel sleeve 16 of the telescopic adjustment part 1 at both ends, and the telescopic adjustment part 1 is adjusted manually or electrically to make the anti-tensioning steel bar 2 rotate to the root of the thread of the steel sleeve 16;

[0041] S3. Install the base 11 on the inner side of the bottom flange of the steel beam, adjust the basket bolts on both sides, so that the rotating seats 13 at both ends of the anti-tensioning steel bar 2 coincide with the rotating holes of the ear plate 12, insert the pin 14 to fix it, and then complete the installation of the support system;

[0042] S4, pre-arching of the anti-tensioning string support system: rotating the steel sleeve to extend the anti-tensioning string reinforcement 2 between the two fulcrums, rotating the adjusting stud 37, and moving the top and bottom limit rollers 35 to induce the anti-tensioning string reinforcement 2 to arch upward;

[0043] S5, laying the truss floor deck, continue to rotate the steel sleeve and the bottom limit roller 35, so that the support seat 31 is supported on the bottom side of the deck;

[0044] S6, carry out subsequent construction of truss floor decking and concrete;

[0045] S7. During dismantling, the adjusting cylinder is rotated in the reverse direction manually or electrically to unload the anti-tensioning steel bar 2, the pin shaft 14 is pulled out, the temporary anti-tensioning steel bar 2 is dismantled to the ground, and the base 11 is dismantled at the same time. After being sorted out, it is returned to the warehouse or used in the next round of turnover.

[0046] This temporary support method is easy to obtain materials, and the materials used are all common rods. The anti-tension chord is used to form a support system, which converts the vertical load into the compressive stress of the anti-tension chord. It is simple and reliable, and the support design is simple; all systems are detachable, convenient for turnover, low space occupancy, simple operation, and the support device is light in weight, and can be applied to the installation of truss floor decks of different lengths.

[0047] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A temporary support device for an over-limit span truss floor deck, characterized in that: The invention comprises a telescopic adjustment part (1) fixed to the bottom ends of the flanges on both sides, a reverse-tensioned steel bar (2) being fixed between the two telescopic adjustment parts (1), and a support plate system (3), wherein the support plate system (3) comprises a support seat (31) with a T-shaped cross section, the support seat (31) having an opening passing through the inside, two upper rollers (32) being rotatably arranged inside the support seat (31), the reverse-tensioned steel bar (2) passing through the through-hole of the support seat (31), and the two upper rollers (32) being supported on the upper side of the reverse-tensioned steel bar (2), and the telescopic adjustment part (1) is extended to make the reverse-tensioned steel bar (2) bend upward, so that the support seat (31) rises along with the reverse-tensioned steel bar (2) and abuts against the bottom side of the middle part of the support plate supported on the top of the flange.

2. The temporary support device for over-span truss floor deck according to claim 1 is characterized in that: The telescopic adjustment part (1) comprises a base (11), two ear plates (12) are fixedly arranged on the base (11), a rotating seat (13) is arranged between the two ear plates (12), the rotating seat (13) and the ear plate (12) are rotatably connected by inserting a pin shaft (14), a cylinder seat (15) is fixedly arranged on the side of the rotating seat (13), a steel sleeve (16) is coaxially rotatably arranged in the cylinder seat (15), and the end of the steel sleeve (16) is connected to the anti-tensioning steel The end of the rib (2) is threadedly connected, a first motor (17) is fixedly arranged on one side of the cylinder seat (15), a first driving tooth (171) is arranged at the output end of the first motor (17), a first driven tooth (161) meshing with the first driving tooth is coaxially fixedly arranged on the outer side of the steel sleeve (16), and a first manual puller (18) is also coaxially arranged on the steel sleeve (16), and the reverse-tensioned steel bar (2) is bent upward by adjusting the first motor (17) and the first manual puller (18).

3. The temporary support device for over-span truss floor deck according to claim 2 is characterized in that: The support seat (31) is provided with an arc-shaped through groove (311) surrounding the axis of the upper top roller (32), and a lower top roller (33) is slidably arranged in the arc-shaped through groove (311). A stopper (312) is provided at the end of the support seat (31), and a clamping spring (34) is connected between the stopper (312) and the end of the shaft of the lower top roller (33). As the anti-tensioning steel bar (2) bends upward, the lower top roller (33) moves along the arc-shaped through groove (311) with the support of the clamping spring (34), and is always supported on the lower side of the anti-tensioning steel bar (2).

4. The temporary support device for over-span truss floor deck according to claim 3 is characterized in that: The support seat (31) is also provided with a vertical slide groove (313) in the middle part, a bottom limit roller (35) is vertically slidably arranged in the slide groove (313), and also includes a U-shaped clamping block (36) vertically slidably arranged at the bottom side of the middle part of the support seat (31), the two ends of the shaft of the bottom limit roller (35) are respectively connected to the two ends of the U-shaped clamping block (36), the bottom side of the U-shaped clamping block (36) is threadedly connected with an adjusting stud (37), and the upper end of the adjusting stud (37) is rotatably arranged on the support seat (31). The bottom end of the adjusting screw (37) is fixedly provided with a second manual puller (371) at the end thereof, the lower end of the adjusting screw (37) is fixedly provided with a second driven tooth (372), the bottom end of the supporting seat (31) is fixedly provided with a second motor (38), the output end of the second motor (38) is fixedly provided with a second driving tooth (381) meshing with the second driven tooth (372), and the bottom limit roller (35) is pressed against the lower side of the middle part of the anti-tensioning steel bar (2) by adjusting the second motor (38) and the second manual puller (371).

5. The temporary support device for over-span truss floor deck according to claim 4 is characterized in that: A plurality of support tubes (39) with closed bottoms are fixedly arranged on the top surface of the support seat (31), a slide column (391) is coaxially slidably arranged at the bottom of the support tube (39), a support wheel (392) is rotatably arranged at the top end of the slide column (391), and a support spring (393) is arranged between the support wheel (392) and the bottom of the support tube (39).

6. A temporary support method for an over-limit span truss floor deck, using the temporary support device for an over-limit span truss floor deck as claimed in claim 5, wherein the steps are as follows: S1, prepare the anti-tensioned steel bar (2), select HRB threaded steel bars with a diameter of about 20 mm, and the length is determined according to the span of the truss floor deck and the height of the steel beam, and the ends of the anti-tensioned steel bar (2) are threaded to form threads, and the thread length is slightly longer than the inner thread length of the steel casing (16); S2, pass the anti-tensioning steel bar (2) through the support seat (31), so that it is clamped between the grooves of the upper top roller (32) and the lower top roller (33), and is located in the upper groove of the bottom limit roller (35), and then the end of the anti-tensioning steel bar (2) is threadedly connected to the steel sleeve (16) of the telescopic adjustment part (1) at both ends, and the telescopic adjustment part (1) is adjusted manually or electrically to make the anti-tensioning steel bar (2) rotate to the root of the thread of the steel sleeve (16); S3. Install the base (11) on the inner side of the bottom flange of the steel beam, adjust the turnbuckle bolts on both sides so that the rotating seats (13) at both ends of the anti-tensioning steel bar (2) coincide with the rotating holes of the ear plate (12), insert the pin shaft (14) to fix it, and then complete the installation of the support system; S4, pre-arching of the anti-tensioning string support system: rotating the steel sleeve to extend the anti-tensioning string reinforcement (2) between the two supporting points, rotating the adjusting stud (37), and moving the top and bottom limiting rollers (35) to induce the anti-tensioning string reinforcement (2) to arch upward; S5, laying the truss floor deck, and continuing to rotate the steel sleeve and the bottom limit roller (35) so that the support seat (31) is supported on the bottom side of the deck; S6, carry out subsequent construction of truss floor decking and concrete; S7. During dismantling, the adjusting cylinder is rotated in the reverse direction manually or electrically to unload the anti-tensioning steel bar (2), the pin shaft (14) is pulled out, and the temporary anti-tensioning steel bar (2) is dismantled to the ground. At the same time, the base (11) is dismantled, and after being arranged, it is returned to the warehouse or used in the next round of turnover.

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