A temporary support device for over-span truss floor deck and its use method

Abstract

The present invention discloses a temporary support device and method for use of truss floor decks with excessive spans, belonging to the field of building construction technology. The entire support system adopts an inverted chord structure, which is pre-arched by increasing the length of the inverted chord steel bars between the supports. A support plate system is arranged at the top of the arch to support the truss floor. The entire system converts the load of the truss plate into 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 problem in the construction of steel structure floor decks with excessive spans, avoiding the occupation of the bottom floor surface. At the same time, it takes into account various factors such as disassembly and assembly, adjustment, and support point design, facilitating construction.

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-span truss floor deck and a use method thereof. Background Art

[0002] At present, for truss floor decking with excessive steel structure span, temporary support is basically adopted by disc-type or fastener-type steel pipes. 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 vertical support force is obtained by tensioning the string steel bars by increasing the deflection of the string steel bars, but the string steel bars of this support method are in a tensile state, and the design of their support positions is complex, and they are generally welded to the steel beams. In addition, the string steel bars are prone to lateral instability, and the vertical deflection of the string steel bars is not convenient to adjust, and the installation flexibility is not high. Summary of the Invention

[0003] In view of this, the 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 end of the flanges on both sides, and a reverse-tensioned steel bar is fixed between the two telescopic adjustment parts. It also includes a support plate system, and 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, and two upper rollers are rotatably provided inside the support seat. The reverse-tensioned steel bar passes through the through-hole of the support seat, and the two upper rollers are supported on the upper side of the reverse-tensioned steel bar. The telescopic adjustment part is extended to make the reverse-tensioned steel bar bend 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 fixed on the base, a rotating seat is provided between the two ear plates, the rotating seat and the ear plates are rotatably connected by inserting a pin shaft, a cylinder seat is fixed on the side of the rotating seat, a steel sleeve is coaxially rotated in the cylinder seat, the end of the steel sleeve is threadedly connected to the end of the anti-tensioned steel bar, a first motor is fixed 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 engaged with the first driving tooth is coaxially fixed on the outer side of the steel sleeve, and a first manual puller is also coaxially provided on the steel sleeve, and the anti-tensioned steel bar is bent upward by adjusting the first motor and the first manual puller.

[0007] Furthermore, an arc-shaped groove surrounding the axis of the upper top roller is provided on the support seat, and a lower top roller is slidably provided in the arc-shaped 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 of the lower top roller. As the anti-tensioning steel bar bends upward, the lower top roller moves along the arc-shaped 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 of the support seat, and a bottom limit roller is provided for vertical sliding in the slide groove, which also includes a U-shaped block that is vertically slidably arranged on the bottom side of the middle part of the support seat, and the two 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 to an adjusting stud, and the upper end of the adjusting stud is rotatably arranged on the bottom end of the support seat, and the end of the adjusting stud is fixed with a second manual puller, and the lower end of the adjusting stud is fixed with a second driven tooth, and the bottom end of the support seat is fixed with a second motor, and the output end of the second motor is fixed with a second active tooth that meshes with the second driven tooth, and the bottom limit roller is pressed against the lower side of the middle of the anti-tensioned steel bar by adjusting the second motor and the second manual puller.

[0009] Furthermore, a plurality of support cylinders with closed bottoms are fixed on the top surface of the support seat, a sliding column is coaxially slidably provided at the bottom of the support cylinder, a support wheel is rotatably provided at the top of the sliding column, and a support spring is provided between the support wheel and the bottom of the support cylinder.

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

[0011] S1. Prepare the anti-tensioning steel bars. Choose HRB threaded steel bars with a diameter of about 20mm. The length is determined according to the span of the truss floor deck and the height of the steel beam. Thread the ends of the anti-tensioning steel bars to form threads. The thread length should be 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 to the steel casings of the telescopic adjustment parts at both ends. The telescopic adjustment parts are adjusted manually or electrically until 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 turnbuckle bolts on both sides so that the rotating seats at both ends of the anti-tensioning chord steel bar coincide with the lug plate rotating holes. Insert the pin to secure it. This completes the installation of the support system.

[0014] S4. Pre-arching of the anti-tensioning chord support system: Rotate the steel sleeve to extend the anti-tensioning chord reinforcement between the two fulcrums, rotate the adjustment studs, and move the top and bottom limit rollers to induce the anti-tensioning chord 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, manually or electrically rotate the adjusting cylinder in reverse to unload the counter-tensioning steel bars, pull out the pin shaft, remove the temporary counter-tensioning steel bars to the ground, and remove the base at the same time. After tidying up, return it to the warehouse or use it in the next round of turnover.

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

[0019] This invention utilizes an inverted chord support system. This system creates a pre-arch by increasing the length of the inverted chord reinforcement between the supports. A pallet system is then deployed at the top of the arch to support the truss slab. The pallet transforms the truss slab's load into compressive stress in the chord members, transferring this stress to the structural frame at the supports. This solution provides temporary support for steel structure decking construction with excessive spans, avoiding the occupation of the bottom floor surface. It also considers various factors, including assembly and 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 can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the purpose, technical solutions and beneficial effects of the present invention more clear, 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 part;

[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 accompanying 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. block 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 Figures 1 to 5 As shown, the present invention discloses a temporary support device for an over-limit span truss floor deck and a method of use, as shown in FIG. 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, and a reverse-tensioned steel bar 2 is fixed between the two telescopic adjustment parts 1. It also includes a support plate system 3, and 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 provided for rotation inside the support seat 31. The reverse-tensioned steel bar 2 passes through the through-holes 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 utilizes an inverted chord structure. This pre-arch is achieved by increasing the length of the inverted chord reinforcement (2) between the supports. A pallet system (3) is positioned at the top of the arch to support the truss floor. The entire system converts the load of the truss floor into compressive stress in the chord members via the pallets, which is then transferred to the structural frame at the supports. This solution provides temporary support for floor decking construction in steel structures with excessive spans, avoiding the occupation of the lower floor surface. It also considers various factors, including assembly and 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. The rotating seat 13 and the ear plate 12 are rotatably connected by inserting a pin 14. A cylinder seat 15 is fixed on the side of the rotating seat 13, and a steel sleeve 16 is coaxially rotated in the cylinder seat 15. The end of the steel sleeve 16 is threadedly connected to the end of the anti-tensioned steel bar 2. A first motor 17 is fixed on one side of the cylinder seat 15, and a first driving tooth 171 is provided at the output end of the first motor 17. A first driven tooth 161 that meshes with the first driving tooth is coaxially fixed on the outer side of the steel sleeve 16. The steel sleeve 16 is also coaxially provided with a first manual puller 18. By adjusting the first motor 17 and the first manual puller 18, the anti-tensioned steel bar 2 is bent upward.

[0031] In this solution, 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 set up with two adjustment methods. The motor is used to apply a large force to arch the steel bar, and the manual adjustment is used to make fine arch adjustments. 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 groove 311 surrounding the axis of the upper top roller 32, and a lower top roller 33 is slidably provided in the arc-shaped 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 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 solution, 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 5The cam 372 is fixed to the bottom of the support frame 31 so as to prevent the cam 372 from sliding out of the support frame 31. The cam 372 is fixed to the bottom of the support frame 31 so as to prevent the cam 372 from sliding out of the support frame 31.

[0035] This structure is used for the initial upward arching of the anti-tensioned 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-tensioned steel bar 2, causing it to arch upward, providing the anti-tensioned steel bar 2 with an initial upward direction. It is also used to provide rigid support to the lower side of the anti-tensioned steel bar 2 when the subsequent support plate system 3 supports the supporting 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 sliding 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 sliding 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-tensioned steel bar 2 to the top of the anti-tensioned 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 support plate. This structure is conducive to adjusting the position of the support seat 31, providing temporary support when adjusting the support seat 31, and avoiding excessive swinging and position deviation of the support seat 31.

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

[0039] S1. Prepare the anti-tensioned steel bars 2. 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. Thread the ends of the anti-tensioned steel bars 2 to form threads. The thread length is slightly longer than the internal 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 located in the upper groove of the bottom limit roller 35. Then, the ends of the anti-tensioning steel bar 2 are threadedly connected to the steel sleeves 16 of the telescopic adjustment part 1 at both ends. Use manual or electric adjustment to adjust the telescopic adjustment part 1 so that the anti-tensioning steel bar 2 is screwed 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 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 14 to fix it, and complete the installation of the support system;

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

[0043] S5. Lay the truss floor decking and 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 decking;

[0044] S6. Carry out subsequent construction of truss floor decking and concrete;

[0045] S7. During dismantling, the adjusting cylinder is rotated in reverse manually or electrically to unload the anti-tensioning steel bar 2, and the pin 14 is pulled out. The temporary anti-tensioning steel bar 2 is removed to the ground, and the base 11 is removed 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 support system is formed by anti-tension chords, which converts vertical loads into compressive stress of the anti-tension chords. It is simple and reliable, and the support design is simple. All systems are detachable, convenient for turnover and low space occupancy. The operation is simple, 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 and are not limiting. 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-span truss floor deck, characterized by: The invention comprises a telescopic adjustment part (1) fixed to the bottom ends of the flanges on both sides, a reverse tensioning 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) having a T-shaped cross section, a hole being passed through the interior of the support seat (31), two top rollers (32) being rotatably provided inside the support seat (31), the reverse tensioning steel bar (2) passing through the hole of the support seat (31), the two top rollers (32) being supported on the upper side of the reverse tensioning steel bar (2), and the telescopic adjustment part ( 1) stretches, so that the anti-tensioned steel bar (2) bends upward, so that the support seat (31) rises with the anti-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; the telescopic adjustment part (1) includes a base (11), two ear plates (12) are fixedly provided on the base (11), a rotating seat (13) is provided between the two ear plates (12), the rotating seat (13) and the ear plates (12) are rotatably connected by inserting a pin shaft (14), a cylindrical seat (15) is fixedly provided on the side of the rotating seat (13), and the cylindrical seat (15) is provided with a cylindrical seat (15). A steel sleeve (16) is provided for coaxial rotation, and the end of the steel sleeve (16) is threadedly connected to the end of the anti-tensioned steel bar (2). A first motor (17) is fixedly provided on one side of the cylinder seat (15), and a first driving tooth (171) is provided at the output end of the first motor (17). A first driven tooth (161) meshing with the first driving tooth is fixedly provided coaxially on the outer side of the steel sleeve (16). The steel sleeve (16) is also coaxially provided with a first manual puller (18). By adjusting the first motor (17) and the first manual puller (18), the anti-tensioned steel bar (2) is bent upward. The support seat (31) is provided with an arc-shaped through groove (311) surrounding the axis of the upper roller (32), and a lower roller (33) is slidably provided in the arc-shaped through groove (311). A stopper (312) is provided at the end of the support seat (31), and a tightening spring (34) is connected between the stopper (312) and the end of the shaft of the lower roller (33). As the anti-tensioning steel bar (2) bends upward, the lower roller (33) moves along the arc-shaped through groove (311) under the support of the tightening spring (34), and is always supported on the lower side of the anti-tensioning steel bar (2);The support seat (31) is further provided with a vertical slide groove (313) in the middle of the support seat (31), a bottom limit roller (35) is vertically slidably provided in the slide groove (313), and a U-shaped block (36) is vertically slidably provided on the bottom side of the middle 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 block (36), 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 provided at the bottom end of the support seat (31), the end of the adjusting stud (37) is fixedly provided with a second manual puller (371), and the lower end of the adjusting stud (37) is fixedly provided with a second driven tooth (372). A second motor (38) is fixedly provided at the bottom end of the support seat (31), and a second driving tooth (381) meshing with the second driven tooth (372) is fixedly provided at the output end of the second motor (38). By adjusting the second motor (38) and the second manual puller (371), the bottom limit roller (35) is pressed against the lower side of the middle portion of the anti-tensioning steel bar (2); a plurality of support cylinders (39) with closed bottoms are fixedly provided on the top surface of the support seat (31), a sliding column (391) is coaxially slidably provided at the bottom of the support cylinder (39), and a support wheel (392) is rotatably provided at the top end of the sliding column (391), and a support spring (393) is provided between the support wheel (392) and the bottom of the support cylinder (39).

2. A temporary support method for an over-span truss floor deck, using the temporary support device for an over-span truss floor deck according to claim 1, comprising the following steps: S1. Prepare the anti-tensioned steel bar (2). Select HRB threaded steel bar with a diameter of 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-tensioned steel bar (2) are threaded to form threads. 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 so that the anti-tensioning steel bar (2) is screwed 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 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) and 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 fulcrums, rotating the adjustment stud (37), and the upper and lower limit rollers (35), inducing the anti-tensioning string reinforcement (2) to arch upward; 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; S6. Carry out subsequent construction of truss floor decking and concrete; S7. When dismantling, the adjusting cylinder is rotated in the reverse direction manually or electrically to unload the anti-tensioning steel bar (2), and 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.

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