Top-bearing cable-stayed construction load-bearing device and construction method

Abstract

A top-supported cable-stayed construction load-bearing device and construction method, wherein truss composite plates are laid between longitudinal beams, and positioning columns are arranged at the middle positions of building cross beams, and cables with tensioning devices are installed between the truss composite plates and the cables at the upper ends of two corresponding positioning columns, between the positioning columns and the bosses at both sides, and between the bosses and the fixing points of the lower layer or the ground. The position of the bottom plate of the truss composite plate is adjusted by adjusting the tensioning device to avoid the bottom plate from bending downward when pouring concrete, and there is no need to arrange a support frame at the bottom of the truss composite plate, which not only ensures the construction quality, but also reduces unnecessary construction operation steps, thereby greatly improving the efficiency of floor slab construction.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, in particular to an upper-bearing cable-stayed construction load-bearing device and a construction method. Background Art

[0002] When constructing a floor slab, a prefabricated composite slab is usually overlapped on the building beam, and then concrete is poured to finally form an integral floor slab. However, if the span between the building beams is large, the composite slab can easily bend downward during the concrete pouring process, and the construction quality cannot be guaranteed. The current solution to this problem is to install a support frame at the bottom of the composite slab. The height of the support frame is set according to the height of the floor. A support frame that is too high often lacks stability, and additional disassembly and assembly of the support frame is required during the production process of the floor slab, which brings varying degrees of trouble to the construction of the floor slab. Summary of the invention

[0003] The object of the present invention is to provide an upper-supported cable-pulled construction load-bearing device and a construction method, wherein cables with tensioning devices are installed between the truss composite plate and the suspension cables at the upper ends of the two corresponding positioning columns, between the positioning columns and the protrusions at both sides, and between the protrusions and the fixed points of the lower layer or the ground. By adjusting the tensioning device, the truss composite plate is prevented from bending downward when pouring concrete, thereby solving the problems in the prior art without using a support frame.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a construction method of an upper-supported cable-stayed construction load-bearing device described in the present invention comprises the following steps: ① In each building beam of the building, a plurality of truss composite plates are laid between each two adjacent building beams, and the two ends of each truss composite plate are respectively overlapped with the two longitudinal beams between the two building beams, and the length direction of the truss composite plate is perpendicular to the length direction of the longitudinal beam, wherein the truss composite plate comprises a bottom plate and a plurality of trusses arranged on the bottom plate; ② a positioning seat is installed at the building beam corresponding to the middle position of each truss composite plate; ③ a protective cover is placed on the periphery of each positioning seat installed in step ②; ④ a positioning column is installed on the positioning seat so that the positioning column is located in the protective cover placed in step ③; ⑤ a suspension cable is installed between two adjacent positioning columns in the length direction of the longitudinal beam. ;⑥ A first cable with a tensioning device is installed between each truss of each truss composite plate and the suspension cable above each truss; ⑦ Bosses are installed on the outside of the two building beams at both ends of the longitudinal direction of the longitudinal beam, and a second cable with a tensioning device is installed between the boss and the positioning column on the building beam where it is located, and a third cable with a tensioning device is installed between the boss and the lower beam or the ground below the building beam where it is located; ⑧ Adjust the tensioning device on each first cable, second cable and third cable so that the middle of the bottom plate of all truss composite plates is at the same height as the two ends of the bottom plate; ⑨ Lay a steel mesh on each truss composite plate, longitudinal beam and building beam; ⑩ Pour concrete on each truss composite plate, longitudinal beam and building beam so that the steel mesh and truss laid in step ⑨ are buried therein, and the height of the concrete pouring is not higher than the height of the protective sleeve; After the concrete poured in step ⑩ solidifies to form a cast-in-place layer, the first cable is cut off at the surface of the cast-in-place layer, and the second cable, the third cable, the positioning column and the boss are removed; Pour concrete into the protective sleeve until the steps The cast-in-place layer formed in the process is flush with each other, and after the concrete solidifies, a composite floor is obtained. After the positioning column in step ④ is installed, a positioning pin is inserted into the positioning column and the positioning seat. The positioning column and the positioning seat are provided with a through hole that matches the positioning pin. The positioning pin is a bolt. After the positioning column is installed on the positioning seat, a bolt is passed through the through holes on the positioning column and the positioning seat, and a fastening nut is screwed on the bolt to fix the positioning seat to the positioning column. A fixed pulley is installed on the boss. The second cable and the third cable installed between the positioning column on the building beam where the boss is located and the lower beam or the ground below are the same cable. A set of tensioning devices are installed on the cable, and this cable bypasses the fixed pulley. A top-bearing cable-stayed construction load-bearing device, comprising a plurality of rows of building beams arranged side by side, longitudinal beams are arranged at both ends of the length direction of the building beams, a truss composite plate is laid between the two longitudinal beams, the length direction of the truss composite plate is perpendicular to the length direction of the longitudinal beams, the truss composite plate comprises a bottom plate and a plurality of trusses arranged on the bottom plate, the bottom plate is located on the longitudinal beams, a positioning seat is installed at the building beam corresponding to the middle position of each truss composite plate, a protective sleeve is arranged on the periphery of the positioning seat, the protective sleeve is located on the building beam, a detachable positioning column is installed on the positioning seat, and the positioning column is located in the protective sleeve Inside, a suspension cable is installed at the upper end between two adjacent positioning columns in the length direction of the longitudinal beam, a first cable with a tensioning device is installed between each truss and the suspension cable on the corresponding truss composite plate, one end of the first cable is connected to the truss upper chord, and the other end of the first cable is connected to the suspension cable, a boss is installed on the outer side of two building beams at both ends of the longitudinal beam in the length direction, a second cable with a tensioning device is installed between the boss and the positioning column on the building beam where it is located, and a third cable with a tensioning device is installed between the boss and the lower beam or the ground below the building beam where it is located. The protective sleeve is a rectangular sleeve, and the length direction of the rectangular sleeve is arranged along the length direction of the building beam. Matching through holes are opened on the positioning column and the positioning seat, and bolts pass through the through holes and are matched with fastening nuts. The axial direction of the bolt is arranged along the length direction of the rectangular sleeve, and the bolt can extend between the rectangular sleeve and the positioning column. A fixed pulley is arranged on the boss, and the second and third cables are the same cable and pass around the fixed pulley.

[0005] The positive effects of the present invention are: an upper-supported cable-stayed construction load-bearing device and a construction method described in the present invention, truss composite plates are laid between longitudinal beams, and positioning columns are arranged at the middle position of the building cross beams, and cables with tensioning devices are installed between the truss composite plates and the suspension cables at the upper ends of the two corresponding positioning columns, between the positioning columns and the protrusions at both sides, and between the protrusions and the fixed points of the lower layer or the ground. The position of the bottom plate of the truss composite plate is adjusted by adjusting the tensioning device to avoid the bottom plate from bending downward when pouring concrete. There is no need to set a support frame at the bottom of the truss composite plate, which not only ensures the construction quality, but also reduces unnecessary construction operation steps, thereby greatly improving the efficiency of floor construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 is a schematic diagram of the structure of the present invention; (a schematic diagram of the state after the bottom plate is adjusted in step ⑧)

[0007] Figure 2 yes Figure 1 A top view of

[0008] Figure 3 It is an enlarged view of the AA section view in 1;

[0009] Figure 4 It is a schematic diagram of the structure after laying the steel mesh and pouring concrete in step 9 and step 10;

[0010] Figure 5 It is a structural schematic diagram of pouring concrete into the protective sleeve after removing the positioning column in step 11 and step 12;

[0011] Figure 6 The invention is a structural embodiment in which a cable is installed between a positioning column and a lower fixing point or the ground. DETAILED DESCRIPTION

[0012] The construction method of the top-bearing cable-stayed construction load-bearing device of the present invention comprises the following steps:

[0013] ① In each building beam 1 of the building, a plurality of truss composite plates are laid between each two adjacent building beams 1, and the two ends of each truss composite plate are respectively overlapped with the two longitudinal beams 12 between the two building beams 1, and the length direction of the truss composite plate is perpendicular to the length direction of the longitudinal beam 12, wherein the truss composite plate includes a bottom plate 3 and a plurality of trusses 4 arranged on the bottom plate 3. The longitudinal beam 12 is arranged between the ends of the building beam 1 in the length direction, and the length direction of the truss composite plate is parallel to the length direction of the building beam 1. The arrangement of the truss 4 can make the combination of the concrete layer and the bottom plate 3 more tightly during the later pouring of concrete.

[0014] ② Install the positioning seat 2 at the building beam 1 corresponding to the middle position of each truss composite plate, and the positioning seat 2 is located in the middle position of the length direction of the truss composite plate. If the building beam 1 is a metal beam, the positioning seat 2 is welded and fixed on the building beam 1. If the building beam 1 is a precast concrete beam, it is necessary to set a protruding embedded metal part inside the building beam 1 during the manufacture, and the positioning seat 2 is welded and fixed to the embedded metal part.

[0015] ③ A protective sleeve 5 is placed on the outer periphery of each positioning seat 2 installed in step ②, and the protective sleeve 5 is located on the building beam 1.

[0016] ④ Install the positioning column 6 on the positioning seat 2 so that the positioning column 6 is located in the protective sleeve 5 placed in step ③.

[0017] ⑤ A suspension cable 13 is installed between two adjacent positioning columns 6 in the length direction of the longitudinal beam 12 , and the suspension cable 13 is located at the upper position of the truss composite plate between the two positioning columns 6 .

[0018] ⑥ A first cable 8 with a tensioning device 7 is installed between each truss 4 of each truss composite plate and the suspension cable 13 above each truss 4. One end of the first cable 8 is connected to the suspension cable 13, and the other end of the first cable 8 is connected to the truss 4. By adjusting the tensioning device 7, the length of the first cable 8 between the truss composite plate and the suspension cable 13, as well as the position of the bottom plate 3 of the entire truss composite plate, can be adjusted to avoid downward bending during concrete pouring.

[0019] ⑦ Bosses 14 are installed on the outside of the two building beams 1 at both ends of the longitudinal beam 12 in the length direction, and a second cable 15 with a tensioning device 7 is installed between the boss 14 and the positioning column 6 on the building beam 1 where it is located, and a third cable 16 with a tensioning device 7 is installed between the boss 14 and the lower beam or ground below the building beam 1 where it is located. The provision of the second cable 15 and the third cable 16 allows each positioning column 6 and the boss 14 to be subjected to pre-tensioning forces in the directions of both sides, and combined with the beams or ground of the built floors, the stability of the overall load-bearing device can be greatly improved.

[0020] ⑧ Adjust the tensioning device 7 on each first cable 8, second cable 15 and third cable 16 to make the middle of the bottom plate 3 of all truss laminated plates have the same height as the two ends of the bottom plate 3. Keep the entire truss laminated plate at the same horizontal position before pouring concrete to avoid bending of the middle of the length direction of the truss laminated plate when pouring concrete.

[0021] ⑨ Lay steel mesh 11 on each truss composite plate, longitudinal beam 12 and building cross beam 1 to further improve the building strength of the constructed floor.

[0022] ⑩ Pour concrete on each truss composite plate, longitudinal beam 12 and building beam 1, so that the steel mesh 11 and truss 4 laid in step ⑨ are buried therein, and the height of the concrete pouring is not higher than the height of the protective cover 5. Figure 4 As shown, the pouring height of the concrete can be flush with the height of the protective cover 5. Except for the space inside the protective cover 5, concrete is poured on the truss composite plate, the longitudinal beam 12 and the building beam 1 to facilitate the removal of the positioning column 6 in the protective cover 5 at a later time.

[0023] After the concrete poured in step ⑩ solidifies to form a cast-in-place layer, the first cable 8 is cut at the surface of the cast-in-place layer, and the second cable 15, the third cable 16, the positioning column 6 and the protrusion 14 are removed.

[0024] Pour concrete into the protective cover 5 until the same as step The cast-in-place layer formed in the process is flush with each other, and after the concrete solidifies, a composite floor is obtained. Figure 5 As shown, after the positioning column 6 is removed, a flush concrete pouring layer is formed on the truss composite plate, the longitudinal beam 12 and the building beam 1, that is, the floor to be constructed. If the height of the protective cover 5 is higher than the cast-in-place layer after pouring, the excess height of the protective cover 5 can be manually cut off after the concrete solidifies.

[0025] Furthermore, in order to ensure the connection strength between the positioning column 6 and the positioning seat 2, after the positioning column 6 is installed in step ④, a positioning pin is inserted into the positioning column 6 and the positioning seat 2, wherein the positioning column 6 and the positioning seat 2 are provided with a through hole that matches the positioning pin.

[0026] Furthermore, the positioning pin is a bolt 9. When the positioning column 6 is installed on the positioning seat 2, the bolt 9 is passed through the through holes on the positioning column 6 and the positioning seat 2, and the fastening nut 10 is screwed on the bolt 9 to fix the positioning seat 2 to the positioning column 6.

[0027] Furthermore, in order to facilitate installation, Figure 6 As shown, a fixed pulley 17 is installed on the boss 14, and the second cable 15 and the third cable 16 installed between the positioning column 6 on the building beam 1 where the boss 14 is located and the lower beam or the ground below are the same cable, and a set of tensioning devices are installed on the cable, and the cable bypasses the fixed pulley 17. It is equivalent to installing a fixed pulley 17 on the outer side of the boss 14, and the fixed ends of the second cable 15 and the third cable 16 on the boss 14 are connected to form the same cable, and are matched on the fixed pulley 17. The two sides of the boss 14 are similar to the positioning column 6 and are also subjected to tension from two directions, so that the overall device is stable.

[0028] The top cable-stayed construction load-bearing device is as follows: Figure 1 and Figure 2 As shown, it includes several rows of building beams 1 arranged side by side, longitudinal beams 12 are arranged at both ends of the length direction of the building beams 1, and a truss composite plate is laid between the two longitudinal beams 12. The length direction of the truss composite plate is perpendicular to the length direction of the longitudinal beams 12. The truss composite plate includes a bottom plate 3 and several trusses 4 arranged on the bottom plate 3, and the bottom plate 3 is located on the longitudinal beams 12. A positioning seat 2 is installed at the building beam 1 corresponding to the middle position of each truss composite plate, and a protective cover 5 is arranged on the periphery of the positioning seat 2. The protective cover 5 is located on the building beam 1. A detachable positioning column 6 is installed on the positioning seat 2, and the positioning column 6 is located inside the protective cover 5.

[0029] Suspension cables 13 are installed at the upper ends between two adjacent positioning columns 6 in the length direction of the longitudinal beam 12, and first cables 8 with tensioning devices 7 are installed between each truss 4 and the suspension cables 13 on the corresponding truss composite plate. One end of the first cable 8 is connected to the upper chord of the truss 4, and the other end of the first cable 8 is connected to the suspension cable 13, which is equivalent to using the same number of first cables 8 as the truss 4 to lift the truss composite plate. Each truss composite plate is supported by the longitudinal beam 12 at both ends in the length direction. At the middle position where deformation is most likely to occur, the first cable 8 is used to apply an upward pulling force to the entire truss composite plate, so that the bottom plate 3 of the truss composite plate is in the same horizontal position, which can offset the gravity of most of the concrete layer during the later concrete pouring, thereby avoiding the truss composite plate from being subjected to stress and causing downward bending deformation, thereby ensuring the normal progress of construction.

[0030] The gravity of the concrete layer will be transmitted to the suspension cable 13 and the positioning column 6 through the first cable 8. The positioning column 6 at the middle position will be subjected to the tension of the suspension cables 13 on both sides, while the positioning column 6 at the two side positions will only be subjected to the tension of the suspension cables 13 on one side. In order to ensure the stability of each positioning column 6, a protrusion 14 is installed on the outer side of the two building beams 1 at both ends of the longitudinal beam 12 in the length direction. A second cable 15 with a tensioning device 7 is installed between the protrusion 14 and the positioning column 6 on the building beam 1 where it is located, and a third cable 16 with a tensioning device 7 is installed between the protrusion 14 and the lower beam or ground below the building beam 1 where it is located. The arrangement of the second cable 15 and the third cable 16 allows the positioning columns 6 at the two side positions to be subjected to pre-tension in the two-side directions. At the same time, combined with the beams or ground of the built floors, the protrusion 14 is also subjected to pre-tension in the two-side directions. The arrangement of the above cables can greatly improve the stability of the overall load-bearing device. The tension applied to the truss composite plate can be changed by adjusting the tensioning device 7, so as to meet the requirements for pouring concrete of different weights.

[0031] Furthermore, the protective sleeve 5 is a rectangular sleeve, the length direction of which is arranged along the length direction of the building beam 1, and the positioning column 6 and the positioning seat 2 are provided with matching through holes, and the bolts 9 pass through the through holes and are matched with the fastening nuts 10. Figure 3 As shown, the axial direction of the bolt 9 is arranged along the length direction of the rectangular sleeve, and the bolt 9 can be inserted between the rectangular sleeve and the positioning column 6. The arrangement of the bolt 9 and the fastening nut 10 improves the connection strength between the positioning column 6 and the positioning seat 2 to a certain extent, and also facilitates the detachable fixation between the positioning column 6 and the positioning seat 2, wherein the length direction distance of the rectangular sleeve is slightly greater than twice the length of the bolt 9, so that the bolt 9 is first inserted between the rectangular sleeve and the positioning column 6, and then inserted into the through hole and the fastening nut 10 is installed in coordination.

[0032] Furthermore, in order to facilitate the installation of the cables on the positioning columns 6 on both sides of the load-bearing device, as shown in FIG. Figure 6 As shown, a fixed pulley 17 is provided on the protrusion 14, and the second cable 15 and the third cable 16 are the same cable and pass around the fixed pulley 17. There is no need to set up two cables for fixed installation respectively. It is only necessary to fix the cable between the positioning column 6 and the fixed point of the bottom layer or the ground, and pass around the fixed pulley 17 on the protrusion 14. Only one tensioning device 7 can be set on this cable. By adjusting the tensioning device 7, the protrusion 14 is subjected to tension in the upper and lower directions, so that the overall device maintains sufficient stability.

[0033] The technical solution of the present invention is not limited to the scope of the embodiments described in the present invention. The technical contents not described in detail in the present invention are all well-known technologies.

Claims

1. A construction method for a top-bearing cable-stayed construction load-bearing device, characterized in that: The following steps are involved: ① In each building cross beam (1) of the building, a plurality of truss composite plates are laid between each two adjacent building cross beams (1), and the two ends of each truss composite plate are respectively overlapped with the two longitudinal beams (12) between the two building cross beams (1), and the length direction of the truss composite plate is perpendicular to the length direction of the longitudinal beam (12), wherein the truss composite plate includes a bottom plate (3) and a plurality of trusses (4) arranged on the bottom plate (3); ② Installing a positioning seat (2) at the building beam (1) corresponding to the middle position of each truss composite plate; ③ Place a protective sleeve (5) on the outer periphery of each positioning seat (2) installed in step ②; ④ Installing the positioning column (6) on the positioning seat (2) so that the positioning column (6) is located inside the protective sleeve (5) placed in step ③; ⑤ installing a suspension cable (13) between two adjacent positioning columns (6) in the length direction of the longitudinal beam (12); ⑥ A first cable (8) with a tensioning device (7) is installed between each truss (4) of each truss composite plate and the suspension cable (13) above each truss (4); ⑦ Bosses (14) are installed on the outside of two building beams (1) at both ends of the longitudinal direction of the longitudinal beam (12); a second cable (15) with a tensioning device (7) is installed between the boss (14) and the positioning column (6) on the building beam (1) where the boss (14) is located; and a third cable (16) with a tensioning device (7) is installed between the boss (14) and the lower beam or the ground below the building beam (1) where the boss (14) is located; ⑧ adjusting the tensioning device (7) on each of the first cable (8), the second cable (15) and the third cable (16) so that the middle of the bottom plate (3) of all the truss laminated plates is at the same height as the two ends of the bottom plate (3); ⑨ Laying steel mesh (11) on each truss composite plate, longitudinal beam (12) and building beam (1); ⑩ pouring concrete on each truss composite plate, longitudinal beam (12) and building beam (1) so that the steel mesh (11) and truss (4) laid in step ⑨ are embedded therein, and the height of the concrete pouring is not higher than the height of the protective sleeve (5); 11. After the concrete poured in step ⑩ solidifies to form a cast-in-place layer, the first cable (8) is cut at the surface of the cast-in-place layer, and the second cable (15), the third cable (16), the positioning column (6) and the boss (14) are removed; 12. pouring concrete into the protective sleeve (5) until it is flush with the cast-in-place layer formed in step 11, and after the concrete solidifies, a composite floor slab is obtained; A fixed pulley (17) is installed on the protrusion (14), and the second cable (15) and the third cable (16) installed between the positioning column (6) on the building beam (1) where the protrusion (14) is located and the lower beam or the ground below are the same cable. A set of tensioning devices are installed on the cable, and the cable bypasses the fixed pulley (17); Step ④ After the positioning column (6) is installed, a positioning pin is inserted into the positioning column (6) and the positioning seat (2).

2. The construction method of a top-mounted cable-stayed load-bearing device according to claim 1, characterized in that: The positioning column (6) and the positioning seat (2) are provided with through holes that match the positioning pins.

3. The construction method of a top-type cable-stayed construction load-bearing device according to claim 2, characterized in that: The positioning pin is a bolt (9). When the positioning column (6) is mounted on the positioning seat (2), the bolt (9) is passed through the through holes on the positioning column (6) and the positioning seat (2), and a fastening nut (10) is screwed on the bolt (9) to fix the positioning seat (2) and the positioning column (6).

4. A top-type cable-stayed construction load-bearing device, characterized in that: The invention comprises a plurality of rows of building beams (1) arranged side by side, longitudinal beams (12) are arranged at both ends of the building beams (1) in the length direction, a truss composite plate is laid between the two longitudinal beams (12), the length direction of the truss composite plate is perpendicular to the length direction of the longitudinal beams (12), the truss composite plate comprises a bottom plate (3) and a plurality of trusses (4) arranged on the bottom plate (3), the bottom plate (3) is located on the longitudinal beams (12), a positioning seat (2) is installed at the building beam (1) corresponding to the middle position of each truss composite plate, a protective sleeve (5) is arranged on the outer periphery of the positioning seat (2), the protective sleeve (5) is located on the building beam (1), a detachable positioning column (6) is installed on the positioning seat (2), the positioning column (6) is located inside the protective sleeve (5), and the longitudinal beam (12) is provided with a positioning column (6) in the length direction of the longitudinal beam (12). A suspension cable (13) is installed at the upper end between two adjacent positioning columns (6), and a first cable (8) with a tensioning device (7) is installed between each truss (4) and the suspension cable (13) on the corresponding truss composite plate. One end of the first cable (8) is connected to the upper chord of the truss (4), and the other end of the first cable (8) is connected to the suspension cable (13). A protrusion (14) is installed on the outer side of two building beams (1) at both ends of the longitudinal beam (12) in the longitudinal direction. A second cable (15) with a tensioning device (7) is installed between the protrusion (14) and the positioning column (6) on the building beam (1) where it is located, and a third cable (16) with a tensioning device (7) is installed between the protrusion (14) and the lower beam or the ground below the building beam (1) where it is located.

5. The top-type cable-stayed construction load-bearing device according to claim 4, characterized in that: The protective sleeve (5) is a rectangular sleeve, the length direction of which is arranged along the length direction of the building beam (1), the positioning column (6) and the positioning seat (2) are provided with matching through holes, the bolts (9) pass through the through holes and are matched with fastening nuts (10), the axial direction of the bolts (9) is arranged along the length direction of the rectangular sleeve, and the bolts (9) can extend between the rectangular sleeve and the positioning column (6).

6. The top-bearing cable-stayed construction load-bearing device according to claim 4, characterized in that: A fixed pulley (17) is provided on the protruding frame (14), and the second cable (15) and the third cable (16) are the same cable and pass around the fixed pulley (17).

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