Construction method of large-span adjustable down-pulling cable supported steel bar truss floor support plate

Abstract

The application discloses a construction method of a large-span adjustable down-pulling cable support steel bar truss floor support plate, which comprises the following construction steps: bottom plate manufacturing, steel bar truss welding into a whole, steel bar truss floor support plate assembling, fixed inclined rod and adjustable support rod installation, cable installation and adjustment, steel bar truss floor support plate hoisting, steel bar processing of the floor support plate, concrete pouring and adjustable down-pulling cable support structure dismantling; the adjustable down-pulling cable support structure of the steel bar truss floor support plate is composed of eight parts, i.e., a bent hook lifting rod, a profile steel plate, a fixed inclined rod, a connecting head, an adjustable support rod, a longitudinal connecting rod, a cable and a flower basket bolt; the truss steel bar and the bottom plate are fixedly connected through the bent hook lifting rod, the bent hook lifting rod is inserted into the bottom plate, the installation quality is easy to guarantee, and the adjustable down-pulling cable support structure solves the problem of the large-span steel bar truss floor support plate simply supported span mid-span deflection.

Description

TECHNICAL FIELD

[0001] The present application relates to the construction of steel bar truss floor, in particular to a large-span adjustable down cable support steel bar truss floor construction method. BACKGROUND

[0002] For the construction of cast-in-place concrete above the large-span steel bar truss floor exceeding 4m, there is a risk of floor collapse. Therefore, temporary support needs to be added in the middle of the span during construction, which increases the construction period, construction cost and construction safety. Moreover, the more supports affect the subsequent construction of the current floor, limiting the construction efficiency of the composite floor slab. At the same time, the steel bar truss in the traditional steel bar truss floor is usually fixed on the bottom plate by welding, which is easy to cause welding breakdown and thus cause the problem of mortar leakage, bringing safety hazards.

[0003] Therefore, it is necessary to optimize and improve the support structure, steel bar truss fixing method and construction method of the large-span steel bar truss floor. SUMMARY

[0004] The present application aims at the problems existing in the construction of the large-span steel bar truss floor and proposes a large-span adjustable down cable support steel bar truss floor construction method.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions.

[0006] The application discloses a large-span adjustable down-pulling cable support structure which is arranged below a steel bar truss floor support plate and is composed of eight parts, i.e., a hook lifting rod, a profile steel plate, a fixed inclined rod, a connecting head, an adjustable support rod, a longitudinal connecting rod, a cable and a basket bolt. The steel bar truss floor support plate is composed of a steel bar truss and a bottom plate; the steel bar truss is arranged above the bottom plate and is composed of top chord bars, bottom chord bars, side vertical bars, side horizontal bars and inclined web bars; the bottom plate is provided with matching overlapping edges on two side edges in the length direction and is provided with lifting rod holes at intervals on the bottom plate; the side horizontal bars at two ends of the steel bar truss are arranged at the bottom of the bottom chord bars and are close to the bottom plate; the bottom chord bars and the bottom plate are provided with pads and the hook lifting rods at intervals; the hook lifting rod is composed of a top hook and a bottom threaded rod, the hook is tightly buckled to the bottom chord bar, and the threaded rod penetrates through the pad and the lifting rod hole on the bottom plate; the profile steel plate is perpendicular to the steel bar truss in the length direction, is fixed below the bottom plate through the threaded rod and a fixed nut, and is provided with a rotating support at the central part of each vertical projection of the steel bar truss; the fixed inclined rod is provided with a U-shaped clamping head and an arc-shaped end at two ends respectively, and is provided with an inclined rod mounting hole at each end; the U-shaped clamping head is connected to the connecting head through a rotating shaft, and the arc-shaped end is connected to the rotating support through a rotating shaft; the connecting head is provided with four fixed holes and an arc-shaped channel, is arranged at the intersection of two fixed inclined rods, and forms a stable triangular support together with the two fixed inclined rods and a vertical adjustable support rod on the same connecting head; the adjustable support rod is arranged directly above the connecting head and is tightly pressed against the bottom plate; the longitudinal connecting rod is arranged between the connecting heads which are adjacent in the short side direction of the bottom plate, and connects the adjustable down-pulling cable support structures below the adjacent steel bar trusses on the same bottom plate into a whole; the cable rope body is provided with a fastening section and a ring at two ends respectively, and is provided with a hook through the ring; the hook is connected to the side rotating support and the basket bolt buckle respectively; and the basket bolt is arranged between the two cables.

[0007] Preferably, the bottom plate lifting rod holes are arranged on the two sides of the bottom chord bars of the steel bar truss, the hook lifting rods, the pad lifting rod holes and the bottom plate lifting rod holes are one-to-one corresponding and vertically through.

[0008] Preferably, the hook lifting rods are symmetrically arranged on the two sides of the bottom chord bars.

[0009] Preferably, the rotating support is composed of two side ear plates and a rotating shaft, the side ear plate is provided with a rotating shaft hole, and the rotating shaft is fixed in the rotating shaft hole through a fixed nut; the rotating shafts of the profile steel plate rotating supports are connected to the arc-shaped end of the fixed inclined rod and the cable hook respectively, the profile steel plate rotating support corresponding to the position of the side edge of the steel bar truss is connected to the cable, and the rotating supports at the remaining positions are connected to the fixed inclined rod.

[0010] Preferably, the number of the fixed inclined rods is twice the number of the adjustable support rods.

[0011] Preferably, the fixed holes are connected to the left and right fixed inclined rods, the top adjustable support rod and the adjacent connecting heads in the short side direction of the same bottom plate respectively; the arc-shaped channel is a symmetrical U-shaped channel below the fixed holes and penetrates through the two sides of the connecting head.

[0012] Preferably, one end of the adjustable support rod is provided with a U-shaped socket, is fixed to the connecting head through a rotating shaft, and is provided with an enlarged end bottom plate, which is tightly pressed through length adjustment.

[0013] Preferably, the flower basket bolt comprises a screw rod, a buckle and a flower basket, and the hook is provided with a anti-dropping rod.

[0014] Preferably, the adjustable down cable support structure of the steel bar truss floor slab can be constructed by the following steps:

[0015] S1, bottom plate manufacturing: manufacturing a metal bottom plate, treating the lap joint edge, laying out the position of the steel bar truss, and drilling hoisting rod holes at specified positions on both sides of the steel bar truss.

[0016] S2, welding the steel bar truss into a whole: welding the steel bar truss, first connecting the upper chord and the lower chord into a whole through the side vertical bars and the side horizontal bars, and welding the inclined web bars at intervals between the upper chord and the lower chord.

[0017] S3, steel bar truss floor slab assembly: S3.1, placing the steel bar truss on the bottom plate; S3.2, placing a cushion block at the position of the hoisting rod hole on the bottom plate, and the hoisting rod hole of the cushion block corresponds to the hoisting rod hole of the bottom plate; S3.3, installing the hook hoisting rod one by one, and the threaded rod passes through the cushion block and the hoisting rod hole on the bottom plate in sequence, so that the hook is completely fixed to the lower chord.

[0018] S4, fixing the inclined rod and the adjustable support rod: S4.1, welding a rotating support on the steel plate, and installing the fixed inclined rod on part of the steel plate with the rotating support; S4.2, fixing the steel plate below the bottom plate through the threaded rod and the fixing nut, installing the steel plate without the fixed inclined rod to both sides of the bottom plate, and installing the steel plate with the fixed inclined rod to the remaining parts; S4.3, installing the adjustable support rod on the fixing hole at the top of the connecting head; S4.4, installing the connecting head between the corresponding fixed inclined rods, adjusting the length of the adjustable support rod and clamping it, so that the end of the adjustable support rod tightly contacts the bottom plate and forms a stable triangular support shape; S4.5, installing the longitudinal connecting rod between the adjacent connecting heads on the same bottom plate.

[0019] S5, cable installation and adjustment: S5.1, fixing one end of the cable to the rotating shaft of the side steel plate through the hook, and fixing the other end to the buckle on one side of the flower basket bolt through the arc-shaped channel of the connecting head; S5.2, symmetrically installing two cables on both sides of the flower basket bolt; S5.3, adjusting the screw rod of the flower basket bolt, so that the cables on both sides of the flower basket bolt are in a tight and stressed state, and the bottom plate is in a pre-arched state upward.

[0020] S6, steel bar truss floor slab hoisting: hoisting the steel bar truss floor slab with the adjustable down cable support to above the beam body, and overlapping the lap joint edges of the adjacent steel bar truss floor slabs.

[0021] S7, floor support plate steel bar processing: the upper chord of the steel bar truss floor support plate on both sides of the beam body is tied into a whole by connecting steel bars, and the steel bars of the beam body are bent towards both sides of the steel bar truss floor support plate.

[0022] S8, concrete pouring: cast-in-place concrete construction is carried out on the steel bar truss floor support plate, and maintenance is carried out.

[0023] S9, adjustable down cable support structure removal: after the concrete of the floor reaches the strength, the adjustable down cable support is removed, and the removal sequence is cable first, adjustable support rod and fixed inclined rod second, and steel plate last.

[0024] The technical scheme related to the present application has the beneficial effects compared with the traditional technology:

[0025] 1. The truss steel bars and the bottom plate are fixedly connected by using the hook hanger, welding is not required in the installation process, the construction safety is high, the hook hanger can be inserted into the hanger hole of the bottom plate, the installation quality is easy to guarantee, and the construction efficiency is high.

[0026] 2. The steel bar truss floor support plate is additionally provided with the adjustable down cable support structure at the bottom in addition to the top steel bar truss, and the problem of deflection of the simply supported span of the super-long steel bar truss floor support plate is solved.

[0027] 3. The adjustable down cable support structure at the bottom of the steel bar truss floor support plate does not need to be in contact with the ground, and only needs to be installed in a small space at the bottom of the floor support plate, thereby providing a large amount of construction space for the construction below the floor support plate and accelerating the subsequent construction speed.

[0028] 4. The adjustable down cable support structure comprises two side triangular supports and inclined cables, and the triangular supports and the cables are respectively adjusted through U-shaped socket rotation and flower basket bolts, so that the span change of the steel bar truss floor support plate is adapted, and the adaptability is good.

[0029] 5. The hook hanger not only serves as a fixed limiting structure of the top steel bar truss, but also serves as a fixed limiting structure of the adjustable down cable support structure at the bottom, and the utilization efficiency of the component is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a large-span adjustable down cable support structure schematic diagram;

[0031] Figure 2 is a large-span adjustable down cable support structure bottom (support) plane schematic diagram;

[0032] Figure 3 is a large-span adjustable down cable support structure top (steel bar truss) plane schematic diagram;

[0033] Figure 4 is a steel bar truss end steel bar sectional viewFigure 3 Figure 1-1 is a cross-sectional view of a steel plate (middle 1-1);

[0034] Figure 5 Figure 1-2 is a cross-sectional view of a steel plate (middle 2-2); Figure 3

[0035] Figure 6 Figure 1-3 is a cross-sectional view of a steel plate (middle 3-3); Figure 3

[0036] Figure 7 Figure 2 is a schematic diagram of a steel bar truss structure;

[0037] Figure 8 Figure 3 is a schematic diagram of a bottom plate, cushion block, and lower chord bar structure;

[0038] Figure 9 Figure 4 is a schematic diagram of a bottom plate, steel plate, cushion block, and bent hook suspender structure;

[0039] Figure 10 Figure 5 is a schematic diagram of a bottom plate, steel plate, cushion block, bent hook suspender, and lower chord bar structure;

[0040] Figure 11 Figure 6 is a schematic diagram of a bent hook suspender structure;

[0041] Figure 12 Figure 7 is a schematic diagram of a bent hook suspender and cushion block connection;

[0042] Figure 13 Figure 8 is a schematic diagram of a fixed diagonal bar structure;

[0043] Figure 14 Figure 9 is a schematic diagram of a steel bar truss side steel plate structure;

[0044] Figure 15 Figure 10 is a schematic diagram of a middle steel plate and fixed diagonal bar structure;

[0045] Figure 16 Figure 11 is a schematic diagram of a cable and basket bolt connection;

[0046] Figure 17 Figure 12 is a schematic diagram of a connector structure;

[0047] Figure 18 Figure 13 is a cross-sectional view of a connector (middle A-A); Figure 17

[0048] Figure 14 is a schematic diagram of a basket bolt structure; Figure 19

[0049] Figure 15 is a schematic diagram of a cable structure; Figure 20

[0050] Figure 16 is a schematic diagram of a steel bar truss floor slab and bent hook suspender connection structure; Figure 21 ​​​

[0051] Figure 22 is a plan view of the connection between the steel bar truss floor and the hook hanger;

[0052] Figure 23 is a schematic view of the connection structure between the steel bar truss floor and the fixed diagonal rod;

[0053] Figure 24 is a plan view of the connection between the steel bar truss floor and the fixed diagonal rod;

[0054] Figure 25 is a schematic view of the connection structure between the steel bar truss floor and the connecting head;

[0055] Figure 26 is a plan view of the connection between the steel bar truss floor and the connecting head;

[0056] Figure 27 is a schematic view of the steel bar processing structure of the steel bar truss floor on both sides of the beam body;

[0057] Figure 28 is a schematic view of the steel bar processing structure of the steel bar truss floor on both sides of the beam body;

[0058] Figure 29 is a schematic view of the lap joint between adjacent steel bar truss floors;

[0059] Figure 30 is a schematic view of the rear structure of the adjustable downward cable support of the steel bar truss floor;

[0060] Figure 31 is a construction flowchart of the construction method of the large-span adjustable downward cable support steel bar truss floor.

[0061] In the figure, 1 is a steel bar truss, 101 is an upper chord, 102 is a lower chord, 103 is a vertical side edge bar, 104 is a horizontal side edge bar, 105 is a diagonal web bar, 2 is a bottom plate, 201 is a lap joint edge, 3 is a hook hanger, 301 is a hook, 302 is a threaded rod, 4 is a hanger hole, 5 is a fixed diagonal rod, 501 is a U-shaped socket, 502 is a diagonal rod mounting hole, 503 is an arc-shaped end, 6 is an adjustable support rod, 7 is a cable, 701 is a rope body, 702 is a fastening segment, 703 is a ring, 8 is a longitudinal connecting rod, 9 is a connecting head, 901 is a fixed hole, 902 is an arc-shaped channel, 10 is a basket bolt, 1001 is a screw rod, 1002 is a buckle, 1003 is a basket, 11 is a profiled plate, 12 is a rotating support, 1201 is a side ear plate, 1202 is a rotating shaft, 1203 is a rotating shaft hole, 13 is a fixed nut, 14 is a cushion block, 15 is a hook, 1501 is an anti-falling rod, 16 is a beam body, 1601 is a beam body steel bar, 17 is a connecting steel bar, and 18 is cast-in-place concrete. DETAILED DESCRIPTION

[0062] To enhance understanding of the present invention, reference will be made below. Figures 1 to 31 The embodiments of the present invention will be described in detail below. The following embodiments are implemented based on the technical solution of the present invention and provide detailed implementation methods. However, the protection scope of the present invention is not limited to the following embodiments.

[0063] In this embodiment, the large-span adjustable cable-stayed support structure is located below the steel truss floor slab and consists of eight parts: hook hanger 3, steel plate 11, fixed diagonal brace 5, connector 9, adjustable support rod 6, longitudinal connecting rod 8, cable 7, and turnbuckle 10. The steel truss floor slab has a span of 4.5m and a width of 1.0m. The steel truss 1 is 4.3m long with 0.1m gaps on each side. The hook hanger 3 is 0.3m long. The fixed diagonal brace 5 is 0.8m long. The adjustable support rod 6 has an adjustable length range of 0.5~1.0m. The longitudinal connecting rod 8 is 0.6m long, and the steel plate 11 is 0.8m long.

[0064] Combined with appendix Figure 1 As shown, the steel truss floor slab consists of a steel truss 1 and a base slab 2; combined with the attached... Figure 7 As shown, the steel truss 1 is located above the base slab 2 and consists of top chord bars 101, bottom chord bars 102, side vertical bars 103, side transverse bars 104, and diagonal web bars 105; combined with the attached... Figure 3 ~Appendix Figure 6 As shown, the base plate 2 has matching lap edges 201 on both sides along the length direction, and hanger holes 4 are provided at intervals on the base plate 2; the transverse bars 104 on both sides of the steel truss 1 are located at the bottom of the lower chord bar 102 and are close to the base plate 2, and the lower chord bar 102 and the base plate 2 are provided with spacers 14 and hook hangers 3 at intervals.

[0065] Combined with appendix Figure 11 As shown, the hook rod 3 consists of a top hook 301 and a bottom threaded rod 302, combined with the attached... Figure 5 Appendix Figure 9 Appendix Figure 12 As shown, the hook 301 tightly engages with the lower chord rib 102, and the threaded rod 302 passes through the pad 14 and the hanging rod hole 4 on the base plate 2; combined with the attached... Figure 3 As shown, the hook rod 3 and the rod hole 4 of the bottom plate 2 are located on both sides of the lower chord 102 of the steel truss 1. The positions of the hook rod 3, the rod hole 4 on the pad block 14 and the rod hole 4 on the bottom plate 2 correspond one-to-one and are vertically connected.

[0066] Combined with appendix Figure 2 Appendix Figure 22 Appendix Figure 24 Appendix Figure 26As shown, the length direction of the steel plate 11 is perpendicular to the length direction of the steel bar truss 1, and the steel plate 11 is fixed to the bottom plate 2 below through the threaded rod 302 and the fixing nut 13, and a rotating support 12 is arranged at the central part of the vertical projection of each steel bar truss 1.

[0067] In combination with the drawings Figure 13 As shown, the two ends of the fixed inclined rod 5 are respectively provided with a U-shaped socket 501 and an arc-shaped end head 503, and both are provided with an inclined rod mounting hole 502. Figure 1 , the drawings Figure 2 , the drawings Figure 25 As shown, the end of the U-shaped socket 501 is connected to the connecting head 9 through a rotating shaft 1202, and the arc-shaped end head 503 is connected to the rotating support 12 through a rotating shaft 1202.

[0068] In combination with the drawings Figure 17 , the drawings Figure 18 As shown, the connecting head 9 is provided with four fixing holes 901 and an arc-shaped channel 902, the fixing holes 901 are respectively connected to the left and right two fixed inclined rods 5, the top adjustable support rod 6, and the adjacent connecting heads 9 in the short edge direction of the same bottom plate 2; the arc-shaped channel 902 is a symmetrical U-shaped channel below the fixing holes 901, and penetrates through both sides of the connecting head 9. Figure 1 , the drawings Figure 25 As shown, the adjustable support rod 6 is arranged above the connecting head 9 and tightly presses the bottom plate 2, one end of the adjustable support rod 6 is provided with a U-shaped socket 501 and is fixed to the connecting head 9 through a rotating shaft 1202, and the other end is provided with an enlarged end plate and tightly presses the bottom plate 2 by adjusting the length; the number of the fixed inclined rods 5 is twice the number of the adjustable support rods 6.

[0069] In combination with the drawings Figure 2 , the drawings Figure 26 As shown, the longitudinal connecting rod 8 is arranged between the adjacent connecting heads 9 in the short edge direction of the bottom plate 2, and the adjustable downward cable 7 support structures below the adjacent steel bar trusses 1 on the same bottom plate 2 are connected into a whole.

[0070] In combination with the drawings Figure 16 , the drawings Figure 20 As shown, the cable 7 rope body 701 is provided with a fastening segment 702 and a ring 703 at both ends, and a hook 15 is arranged through the ring 703, the hook 15 is connected to the side rotating support 12 and the basket bolt 10 buckle 1002 respectively, and a anti-falling rod 1501 is arranged on the hook 15; the basket bolt 10 is arranged between the two side cables 7.

[0071] In combination with the drawings Figure 2 , the drawings Figure 14 , the drawings Figure 15As shown, the rotating support 12 includes two side ear plates 1201 and a rotating shaft 1202, wherein the side ear plate 1201 is provided with a rotating shaft hole 1203, and the rotating shaft 1202 is fixed in the rotating shaft hole 1203 through a fixing nut 13; the profiled steel plate 11 rotating support 12 rotating shaft 1202 is respectively connected with the fixed inclined rod 5 arc-shaped end 503 and the cable 7 hook 15, wherein the profiled steel plate 11 rotating support 12 at the side edge position corresponding to the steel bar truss 1 is connected with the cable 7, and the profiled steel plate 11 rotating support 12 at the remaining positions is connected with the fixed inclined rod 5.

[0072] In combination with the accompanying drawings Figure 19 As shown, the basket bolt 10 includes a screw rod 1001, a buckle 1002 and a basket 1003.

[0073] In combination with the accompanying drawings Figure 31 As shown, the large-span adjustable lower cable support steel bar truss floor plate construction method comprises the following steps:

[0074] S1, bottom plate 2 manufacturing: manufacturing a metal bottom plate 2, treating the lap joint edge 201, laying out the steel bar truss 1 position, and drilling a lifting rod hole 4 at the specified position on both sides of the steel bar truss 1.

[0075] S2, steel bar truss 1 welding into a whole: in combination with the accompanying drawings Figure 7 As shown, the steel bar truss 1 is welded, first, the upper chord 101 and the lower chord 102 are connected into a whole through the side edge vertical reinforcement 103 and the side edge horizontal reinforcement 104, and the inclined web reinforcement 105 is welded between the upper chord 101 and the lower chord 102.

[0076] S3, steel bar truss floor plate assembly: in combination with the accompanying drawings Figure 3 , accompanying drawings Figure 21 , accompanying drawings Figure 22 As shown, S3.1, the steel bar truss 1 is placed on the bottom plate 2; S3.2, the cushion block 14 is placed at the position of the lifting rod hole 4 on the bottom plate 2, and the lifting rod hole 4 of the cushion block 14 corresponds to the lifting rod hole 4 of the bottom plate 2; S3.3, the hook lifting rod 3 is installed one by one, the threaded rod 302 passes through the cushion block 14 and the lifting rod hole 4 on the bottom plate 2 in turn, so that the hook 301 is completely fixed to the lower chord 102.

[0077] S4, fixed inclined rod 5 and adjustable support rod 6 installation: in combination with the accompanying drawings Figure 23 , accompanying drawings Figure 26As shown, S4.1, welding rotating support 12 on steel plate 11, installing fixed diagonal 5 on part of steel plate 11 with rotating support 12; S4.2, fixing steel plate 11 under base plate 2 through threaded rod 302 and fixed nut 13, installing steel plate 11 without fixed diagonal 5 to both sides of base plate 2, and installing steel plate 11 with fixed diagonal 5 to the rest; S4.3, installing adjustable support 6 on fixed hole 901 on top of connecting head 9; S4.4, installing connecting head 9 between two corresponding fixed diagonals 5, adjusting the length of adjustable support 6 and clamping, so that the end of adjustable support 6 is close to base plate 2, and a stable triangular support shape is formed; S4.5, installing longitudinal connecting rod 8 between adjacent connecting heads 9 on the same base plate 2.

[0078] S5, adjusting cable 7: as shown in the accompanying drawings Figure 1 , the accompanying drawings Figure 2 As shown, S5.1, fixing one end of cable 7 on rotating shaft 1202 of side steel plate 11 through hook 15, and fixing the other end on one side buckle 1002 of basket bolt 10 through arc-shaped channel 902 of connecting head 9; S5.2, symmetrically installing two cables 7 on both sides of basket bolt 10; S5.3, adjusting screw rod 1001 of basket bolt 10, so that cables 7 on both sides of basket bolt 10 are in a tight and stressed state, and base plate 2 is in an upward pre-arch state.

[0079] S6, steel bar truss floor formwork hoisting: as shown in the accompanying drawings Figure 29 Hoist the steel bar truss floor formwork supported by adjustable lower cable 7 above beam body 16, and overlap the overlapping edges 201 of adjacent steel bar truss floor formworks.

[0080] S7, steel bar processing of floor formwork: as shown in the accompanying drawings Figure 27 , the accompanying drawings Figure 28 As shown, the top chord 101 of the steel bar truss floor formwork on both sides of beam body 16 is bound as a whole by connecting steel bar 17, and the beam body steel bar 1601 is bent to both sides of the steel bar truss floor formwork.

[0081] S8, concrete pouring: cast-in-place concrete 18 construction is carried out on the steel bar truss floor formwork, and maintenance is carried out.

[0082] S9, removal of adjustable lower cable 7 support structure: as shown in the accompanying drawings Figure 30 After the concrete of the floor reaches the strength, the adjustable lower cable 7 support is removed, and the removal sequence is cable 7 first, adjustable support 6 and fixed diagonal 5 second, and steel plate 11 last.

[0083] The above examples are only used to explain the technical concept of the present application, and are not limited to the protection of the present application. Any non-essential modification of the present application shall fall within the scope of protection of the present application.

Claims

1. A large span adjustable down-draw rod support structure, characterized by, Located below the steel truss floor slab, it consists of eight parts: hook rod (3), steel plate (11), fixed diagonal rod (5), connector (9), adjustable support rod (6), longitudinal connecting rod (8), cable (7) and turnbuckle (10); The steel truss floor deck is composed of a steel truss (1) and a base plate (2); the steel truss (1) is located above the base plate (2) and is composed of an upper chord bar (101), a lower chord bar (102), side vertical bars (103), side transverse bars (104) and diagonal web bars (105); the base plate (2) has matching lap edges (201) on both sides along its length, and hanger holes (4) are provided at intervals on the base plate (2); the side transverse bars (104) at both ends of the steel truss (1) are located at the bottom of the lower chord bar (102) and are close to the base plate (2); the lower chord bar (102) and the base plate (2) are provided with spacers (14) and hook hangers (3) at intervals. The hook rod (3) consists of a top hook (301) and a bottom threaded rod (302). The hook (301) is tightly fastened to the lower chord (102), and the threaded rod (302) passes through the pad (14) and the rod hole (4) on the bottom plate (2). The steel plate (11) is perpendicular to the length of the steel truss (1), and is fixed to the bottom plate (2) by threaded rod (302) and fixing nut (13), and a rotating support (12) is provided at the center of the vertical projection of each steel truss (1). The fixed diagonal bar (5) is provided with a U-shaped bayonet (501) and an arc-shaped end (503) at both ends, and both are provided with diagonal bar mounting holes (502). The U-shaped bayonet (501) end is connected to the connector (9) through a rotating shaft (1202), and the arc-shaped end (503) is connected to the rotating support (12) through a rotating shaft (1202). The connector (9) is provided with four fixing holes (901) and an arc-shaped channel (902), which are located at the intersection of two fixed diagonal rods (5) and form a stable triangular support with the two fixed diagonal rods (5) and a vertical adjustable support rod (6) on the same connector (9); The adjustable support rod (6) is located directly above the connector (9) and is pressed against the base plate (2); The longitudinal connecting rod (8) is located between adjacent connectors (9) along the short side of the base plate (2), connecting the adjustable cable (7) support structure under adjacent steel trusses (1) on the same base plate (2) into a whole; The cable (7) has a fastening section (702) and a ring (703) at both ends, and a hook (15) is set through the ring (703). The hook (15) is connected to the side rotating support (12) and the turnbuckle (10) buckle (1002). The turnbuckle (10) is located between the two side cables (7).

2. The large span adjustable down cable support structure according to claim 1, wherein, The bottom plate (2) has a rod hole (4) on both sides of the lower chord bar (102) of the steel truss (1). The positions of the rod hole (4) on the hook rod (3), the pad block (14) and the bottom plate (2) are in one-to-one correspondence and are vertically connected.

3. The large span adjustable down cable support structure according to claim 1, wherein, The hooking hanger rods (3) are symmetrically arranged on both sides of the lower chord (102).

4. The large span adjustable down cable support structure according to claim 1, wherein, The rotating support (12) comprises two side ear plates (1201) and a rotating shaft (1202), wherein the side ear plate (1201) is provided with a rotating shaft hole (1203), and the rotating shaft (1202) is fixed in the rotating shaft hole (1203) through a fixing nut (13); the steel plate (11) rotating support (12) rotating shaft (1202) is respectively connected with the arc-shaped end (503) of the fixed inclined rod (5) and the hook (15) of the cable (7), wherein the steel reinforced truss (1) side position corresponding steel plate (11) rotating support (12) is connected with the cable (7), and the remaining parts rotating support (12) is connected with the fixed inclined rod (5).

5. The large span adjustable down cable support structure according to claim 1, wherein, The number of the fixed inclined rods (5) is twice the number of the adjustable supporting rods (6).

6. The large span adjustable down cable support structure according to claim 1, wherein, The fixed holes (901) are respectively connected with the left and right fixed inclined rods (5), the top adjustable supporting rod (6) and the adjacent connecting heads (9) in the short edge direction of the same bottom plate (2); the arc-shaped channel (902) is a symmetrical U-shaped channel below the fixed hole (901) and penetrates through both sides of the connecting head (9).

7. The large span adjustable down cable support structure according to claim 1, wherein, One end of the adjustable supporting rod (6) is provided with a U-shaped socket (501) and is fixed in the connecting head (9) through the rotating shaft (1202), and the other end is provided with an enlarged end bottom plate and is used for tightly pressing the bottom plate (2) by adjusting the length.

8. The large span adjustable down cable support structure according to claim 1, wherein, The flower basket bolt (10) comprises a screw rod (1001), a buckle (1002) and a flower basket (1003); the hook (15) is provided with an anti-dropping rod (1501).

9. A construction method of a large-span adjustable down-drawing cable supported steel bar truss floor panel according to any one of claims 1-8, characterized in that, The method comprises the following steps: S1, bottom plate (2) manufacturing: manufacturing a metal bottom plate (2), treating the lap joint edge (201), laying out the position of the steel reinforced truss (1), and drilling the hanger rod holes (4) at the specified positions on both sides of the steel reinforced truss (1) at intervals; S2, welding the steel reinforced truss (1) into a whole: welding the steel reinforced truss (1), first connecting the upper chord (101) and the lower chord (102) into a whole through the side vertical bars (103) and the side horizontal bars (104), and welding the inclined web bars (105) at intervals between the upper chord (101) and the lower chord (102); S3, steel reinforced truss floor slab assembly: S3.1, placing the steel reinforced truss (1) on the bottom plate (2); S3.2, placing the cushion block (14) at the position of the hanger rod hole (4) on the bottom plate (2), and the hanger rod hole (4) of the cushion block (14) corresponds to the hanger rod hole (4) of the bottom plate (2); S3.3, installing the hooking hanger rods (3) one by one, the threaded rods (302) pass through the cushion block (14) and the bottom plate (2) hanger rod hole (4) in sequence, so that the hook (301) is completely fixed on the lower chord (102); S4, installing the fixed inclined rod (5) and the adjustable supporting rod (6): S4.1, welding the rotating support (12) on the steel plate (11), and installing the fixed inclined rod (5) on part of the steel plate (11) with the rotating support (12). S4.

2. The steel plate (11) is fixed below the base plate (2) by threaded rod (302) and fixing nut (13). The steel plate (11) without fixing diagonal bar (5) is installed on both sides of the base plate (2), and the remaining parts are installed with steel plate (11) with fixing diagonal bar (5). S4.3 Install the adjustable support rod (6) in the fixing hole (901) at the top of the connector (9); S4.4 Install connectors (9) between the two corresponding fixed diagonal bars (5), adjust the length of the adjustable support rod (6) and clamp it so that its end is close to the bottom plate (2) and forms a stable triangular support shape; S4.

5. Install longitudinal connecting rods (8) between adjacent connectors (9) on the same base plate (2); S5. Cable (7) installation and adjustment: S5.

1. Fix one end of the cable (7) to the rotating shaft (1202) of the side steel plate (11) through the hook (15), and the other end passes through the arc-shaped channel (902) of the connector (9) and is fixed to the buckle (1002) on one side of the turnbuckle (10). S5.2, Two cables (7) are symmetrically installed on both sides of the turnbuckle (10); S5.3 Adjust the screw (1001) of the turnbuckle (10) so that the cables (7) on both sides of the turnbuckle (10) are under tension and the base plate (2) is in an upward pre-arched state; S6, hoisting of steel truss floor deck: hoist the steel truss floor deck with adjustable cable (7) support to the top of the beam (16), with the overlapping edges (201) of adjacent steel truss floor decks overlapping; S7, Treatment of floor deck reinforcement: The chord reinforcement (101) on both sides of the steel truss floor deck of the beam (16) is tied into a whole by connecting reinforcement (17), and the beam reinforcement (1601) is bent to both sides of the steel truss floor deck; S8. Concrete pouring: Cast-in-place concrete (18) is poured on the steel truss floor slab and cured. S9. Removal of adjustable cable (7) support structure: After the floor slab concrete reaches the required strength, the adjustable cable (7) support is removed. The removal sequence is: first the cable (7), then the adjustable support rod (6) and the fixed diagonal rod (5), and finally the steel plate (11).

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