UHPC composite beam structure and construction method thereof

Abstract

The invention discloses a UHPC composite beam structure, and belongs to the technical field of building structures, the UHPC composite beam structure comprises a bottom plate and side plates arranged on the two sides, the two ends of the bottom plate are provided with end plates connected with the side plates, the opposite faces of the side plates are each provided with a plurality of rib plates, and the bottom, the side plates, the end plates and the rib plates are all made of UHPC materials; the truss structure comprises four steel beams distributed in a rectangular mode, the ends of the steel beams are connected with the corresponding end plates, a plurality of cross beams are arranged between the transversely adjacent steel beams, a plurality of longitudinal beams are arranged between the vertically adjacent steel beams, the longitudinal beams correspond to the rib plates one to one, and a plurality of inclined supporting rods are obliquely arranged between the adjacent longitudinal beams; a plurality of connecting seats are arranged on the rib plates, and connecting rods are arranged between the connecting seats and the corresponding longitudinal beams; a temporary supporting structure does not need to be erected, dismounting is not needed after pouring forming, and the construction time is saved.

Description

Technical Field

[0001] The invention belongs to the technical field of building structures, and particularly relates to a UHPC composite beam structure and a construction method thereof. Background Art

[0002] The beams in traditional buildings are cast in one piece. During the construction process, formwork and temporary support structures need to be set up on site. After the casting, the formwork needs to be removed. The construction efficiency is low. In addition, the formwork used in the construction has the disadvantages of low turnover rate, high loss and fast depreciation. It consumes a lot of resources every year and has a great impact on the green ecological environment. Therefore, there is a need for a formwork structure that does not require the erection of temporary support structures and does not need to be disassembled after casting, so as to save construction time. Summary of the invention

[0003] In view of this, the present invention discloses a UHPC composite beam structure and a construction method thereof, the purpose of which is to eliminate the need to set up a temporary support structure and to avoid disassembly after casting, thereby saving construction time.

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

[0005] A UHPC composite beam structure comprises a bottom plate and side plates arranged on both sides, end plates connected to the side plates are arranged at both ends of the bottom plate, a plurality of rib plates are arranged on the facing surfaces of the side plates, and the bottom, side plates, end plates and rib plates are all made of UHPC material; and a truss structure is also included, the truss structure comprises four rectangularly distributed steel beams, the ends of the steel beams are connected to the corresponding end plates, a plurality of transverse beams are arranged between the laterally adjacent steel beams, a plurality of longitudinal beams are arranged between the vertically adjacent steel beams, the longitudinal beams correspond to the rib plates one by one, and a plurality of diagonal braces are obliquely arranged between adjacent longitudinal beams; a plurality of connecting seats are arranged on the rib plates, and connecting rods are arranged between the connecting seats and the corresponding longitudinal beams.

[0006] This solution combines the advantages of integral cast-in-place and fully prefabricated construction methods. The prefabricated shell and truss structure significantly reduces the dead weight. Traditional machinery can be used for hoisting, which is easy to transport and can solve the problem of difficult hoisting due to the heavy dead weight of the composite beam. After the hoisting is completed, ordinary concrete is poured, which can avoid on-site formwork, erection of temporary support structures, and dismantling of formwork, thereby improving on-site construction efficiency.

[0007] The top end of the rib plate is longitudinally provided with an adjustment slot connected to the side plate, and the side wall of the adjustment slot is penetrated by a plurality of through slots facing the truss structure, and the connecting seat comprises a seat body arranged in the through slot, and a gap is reserved between the seat body and the side wall of the through slot, and the seat body is provided with a spherical cavity with two ends exposed from the seat body, and a mounting ball is rotatably arranged in the spherical cavity, and a connecting hole is provided on the mounting ball; the connecting rod is a telescopic structure, one end of the connecting rod passes through the corresponding connecting hole and is connected to the sliding seat by a ball joint, and the other end of the connecting rod is detachably connected to the corresponding side wall of the longitudinal beam by a ball joint; a plurality of guide rails slidably connected to the corresponding sliding seat are arranged in the adjusting slot, one end of the guide rail is rotatably connected to a rotating shaft connected to the side plate, and an annular groove coaxial with the rotating shaft is correspondingly opened on the side wall, and a limit block slidably connected to the annular groove is fixed on the other end of the guide rail; a closing plate for blocking the chamber is sleeved on the seat body, and the closing plate is in contact with the side wall of the adjusting slot, and a driving structure for driving the connecting rod to swing and telescope is detachably connected in the adjusting slot.

[0008] In this solution, after pouring concrete into the prefabricated shell, the side panels are deformed by the force of the concrete. At this time, the driving structure drives the connecting rod to swing around the longitudinal beam connection point as the center, and cooperates with the extension and contraction of the connecting rod to drive the slide seat to slide on the guide rail and drive the guide rail to deflect, so that the guide rail and the slide seat are in the deformation area or close to the deformation area, and the direction of the connecting rod remains unchanged. The driving structure drives the connecting rod to extend and contract, and the connecting rod drives the guide rail to move along the axis of the connecting rod through the slide seat. The guide rail pulls or pushes the deformation area of ​​the side panel through the rotating shaft and the limit block, so that the side panel recovers its deformation. In this solution, a closing plate is used to block the groove so that the concrete cannot flow into the adjustment groove during the pouring process, and cooperates with the seat body and the connecting ball so that the connecting rod can still deflect during the concrete solidification process, and then the guide rail and the slide seat are adjusted to be in the deformation area or close to the deformation area, and then the extension and contraction of the connecting rod is used to accurately control the side panel to recover its deformation, so as to improve the accuracy of the composite beam after forming.

[0009] Furthermore, four connecting shafts distributed in a rectangular shape are fixed on the end surface of the closing plate facing away from the truss structure, and the connecting shafts are rotatably connected to support rods perpendicular to them. The ends of the support rods are rotatably connected to support shafts parallel to the connecting shafts, and the support shafts are fixedly connected to the side walls of the adjustment groove.

[0010] Through the cooperation of the connecting shaft, the support rod and the supporting shaft, the closing plate can move in any direction on the plane while keeping close contact with the rib plate, avoiding the deflection of the limiting connecting rod.

[0011] Furthermore, the connecting rod includes a fixed rod, one end of which is connected to the longitudinal beam ball joint, the other end of the fixed rod passes through a connecting hole, extends into the adjusting slot and is sleeved with a moving rod, and the other end of the fixed rod is provided with a thread; the other end of the moving rod is coaxially rotatably provided with a rotating rod connected to the sliding seat ball joint, the end of the moving rod is hinged with a plurality of clamping plates for clamping the fixed rod, and a torsion spring is provided at the hinge, the contact end surface of the clamping plate and the fixed rod is provided with a thread matching the threaded rod, and a sleeve is slidably sleeved on the moving rod; the driving structure includes a support detachably connected to one side of the adjusting slot, and the support is provided with a plurality of A dry driving unit, the driving unit includes a vertically arranged slide rail, each of which is slidably connected to a guide seat, each of which is provided with a power structure for driving the guide seat to move, a telescopic rod facing the moving rod is fixed on the guide seat, an adjusting seat is connected to the end of the telescopic rod by a ball joint, and a reset elastic member is provided between the adjusting seat and the telescopic rod, an arc plate for clamping the moving rod is symmetrically hinged at the end of the adjusting seat, and a torsion motor is hingedly provided, mounting grooves are provided on the inner arc surface of the arc plate, a driving motor is provided in the mounting groove, and a driving gear meshing with the outer wall of the moving rod is provided on the output end of the driving motor.

[0012] In this solution, the detachable connection between the driving structure and the rib plate enables the driving structure to be recycled; in addition, through the driving unit of the driving structure, the deflection and extension of each connecting rod can be accurately controlled, and the side plate can be more accurately controlled to restore the deformation.

[0013] Furthermore, a push rod for pushing the sleeve to move is arranged on the side wall of the arc-shaped plate.

[0014] Furthermore, the bottom plate, side plates and end plates are all printed.

[0015] A construction invention of a UHPC composite beam structure includes the following steps:

[0016] 1) Prefabrication: In the factory, the bottom plate, side plate and end plate are integrally cast to form a shell; after curing, the guide rails and slide seats are installed on the side plates, and the moving rod, rotating rod and slide seats are connected; the rib plate is then cast, and after curing, the connecting seat and closing plate are installed, and then the threaded end of the fixed rod is passed through the connecting ball and inserted into the moving rod;

[0017] 2) Install the combined beam: After hoisting the shell to the installation position, hoist the truss structure, connect and fix the steel beam with the end plate, and connect the end of the fixed rod with the corresponding longitudinal beam with a detachable ball joint; insert the drive structure into the adjustment groove and fix it with the rib plate, and then drive the guide seat to slide through the power structure so that the guide seat is facing the corresponding moving rod, and then control the extension of the telescopic rod to move the arc plate at the end of the adjustment seat to the upper and lower parts of the moving rod, and then control the forward rotation of the torsion motor so that the arc plate is close to the moving rod but the drive gear is not engaged with the moving rod;

[0018] 3) Initial pouring: pour concrete into the shell and vibrate it;

[0019] 4) Adjustment: During the solidification of concrete, if the side plate is deformed, the power structure in the adjacent area is controlled to drive the guide seat to slide and the telescopic rod to extend and retract, and the arc plate clamps the moving rod, thereby driving the deflection of the connecting rod. The connecting rod slides through the slide and drives the guide rail to deflect, so that the slide is in the deformation area or close to the deformation area, and then the power structure and the telescopic rod are closed to limit the direction of the connecting rod; at this time, the torsion motor is controlled to continue to rotate forward, so that the arc plate fits on the moving rod, and the driving gear is engaged with the moving rod, and then the push rod is controlled to extend, and the push rod pushes the sleeve to the clamping plate, so that the thread on the clamping plate is matched with the thread at the end of the fixed rod, and then the drive motor is started. The drive motor drives the moving rod to rotate through the drive gear, and then controls the extension and retraction of the connecting rod, so as to pull or push the deformation area, and the drive motor is turned off after the side plate is restored to deformation;

[0020] 5) Secondary pouring: After the concrete solidifies, control the push rod to reset, then control the torsion motor to reverse, reset the arc plate, then control the telescopic rod to shorten, and then take out the support; then pour concrete in the rib plate and maintain it.

[0021] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0023] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0024] Figure 2 A longitudinal cross-sectional view of an embodiment of the present invention;

[0025] Figure 3 for Figure 2The enlarged schematic diagram of point A in the middle;

[0026] Figure 4 for Figure 3 The enlarged schematic diagram of point B in the middle;

[0027] Figure 5 Schematic diagram of the structure of the driving unit in an embodiment of the present invention.

[0028] The markings in the accompanying drawings are as follows: base plate 1, side plate 2, end plate 3, rib plate 4, steel beam 5, cross beam 6, longitudinal beam 7, diagonal brace 8, support 9, seat body 10, mounting ball 11, slide seat 12, guide rail 13, rotating shaft 14, limit block 15, closing plate 16, connecting shaft 17, supporting shaft 18, support rod 19, fixed rod 20, moving rod 21, rotating rod 22, clamping plate 23, sleeve 24, slide rail 25, guide seat 26, telescopic rod 27, adjusting seat 28, arc plate 29, drive motor 30, drive gear 31, push rod 32. DETAILED DESCRIPTION

[0029] like Figures 1 to 5 As shown:

[0030] A UHPC composite beam structure comprises a bottom plate 1 and side plates 2 arranged on both sides, end plates 3 connected to the side plates 2 are arranged at both ends of the bottom plate 1, and a plurality of ribs 4 are arranged on the facing surfaces of the side plates 2, and the bottom, side plates 2, end plates 3 and ribs 4 are all made of UHPC; it also comprises a truss structure, the truss structure comprises four rectangularly distributed steel beams 5, the ends of the steel beams 5 are connected to the corresponding end plates 3, and the end plates 3 are pre-embedded with embedded parts connected to the steel beams 5 (conventional technical means, so not drawn in the figure), a plurality of transverse beams 6 are welded and fixed between the transversely adjacent steel beams 5, and a plurality of longitudinal beams 7 are welded and fixed between the vertically adjacent steel beams 5, the longitudinal beams 7 correspond to the ribs 4 one by one, and a plurality of obliquely arranged diagonal braces 8 are welded and fixed between adjacent longitudinal beams 7; a plurality of connecting seats are arranged on the ribs 4, and connecting rods are arranged between the connecting seats and the corresponding longitudinal beams 7.

[0031] This solution combines the advantages of the integral cast-in-place and fully prefabricated construction methods. The prefabricated shell and truss structure significantly reduces the deadweight, can be hoisted by traditional machinery, is easy to transport, and can solve the problem of difficult hoisting due to the heavy deadweight of the composite beam. In the factory, the bottom plate 1, side plate 2, and end plate 3 are integrally cast into a shell, and the truss structure is prefabricated; after the shell is hoisted to the installation position, the truss structure is hoisted, and the steel beam 5 is welded to the embedded parts on the end plate 3, and then ordinary concrete is poured, which can avoid on-site formwork, erection of temporary support structures, and demoulding processes, thereby improving on-site construction efficiency.

[0032] In this embodiment, an adjustment groove connected to the side plate 2 is longitudinally opened at the top of the rib plate 4, and a plurality of through grooves facing the truss structure are opened through the side wall of the adjustment groove. The connecting seat includes a seat body 10 arranged in the through groove, and a gap is reserved between the seat body 10 and the side wall of the through groove. A spherical cavity with two ends exposed from the seat body 10 is provided on the seat body 10, and a mounting ball 11 is rotatably arranged in the spherical cavity, and a connecting hole is opened on the mounting ball 11; the connecting rod is a telescopic structure, and one end of the connecting rod passes through the corresponding connecting hole and is connected to the sliding seat 12 with a ball joint, and the other end of the connecting rod is One end is detachably connected to the side wall of the corresponding longitudinal beam 7 by a ball joint; a plurality of guide rails 13 slidably connected to the corresponding sliding seat 12 are arranged in the adjusting groove, one end of the guide rail 13 is rotatably connected to a rotating shaft 14 connected to the side plate 2, and an annular groove coaxial with the rotating shaft 14 is correspondingly opened on the side wall, and a limit block 15 slidably connected to the annular groove is fixed to the other end of the guide rail 13; a closing plate 16 for sealing the chamber is sleeved on the seat body 10, and the closing plate 16 is fitted with the side wall of the adjusting groove, and a driving structure for driving the connecting rod to swing and extend and retract is detachably connected in the adjusting groove.

[0033] In this solution, after pouring concrete into the prefabricated shell, the side panel 2 is deformed by the force of the concrete. At this time, the connecting rod is driven by the driving structure to swing around the connection point of the longitudinal beam 7, and the extension and contraction of the connecting rod is used to drive the slide 12 to slide on the guide rail 13 and drive the guide rail 13 to deflect, so that the guide rail 13 and the slide 12 are in the deformation area or close to the deformation area, and the direction of the connecting rod is kept unchanged. The driving structure is used to drive the connecting rod to extend and contract, and the connecting rod drives the guide rail 13 to move along the axis of the connecting rod through the slide 12. The guide rail 13 pulls or pushes the deformation area of ​​the side panel 2 through the rotating shaft 14 and the limit block 15, so that the side panel 2 recovers its deformation. In this solution, a closing plate 16 is used to block the groove so that concrete cannot flow into the adjustment groove during the pouring process. The seat body 10 and the connecting ball are used to allow the connecting rod to still deflect during the concrete solidification process, thereby adjusting the guide rail 13 and the slide seat 12 to be in the deformation area or close to the deformation area, and then the extension and contraction of the connecting rod is used to accurately control the side panel 2 to restore the deformation, thereby improving the accuracy of the composite beam after forming.

[0034] In this embodiment, four connecting shafts 17 distributed in a rectangular shape are welded and fixed on the end surface of the closing plate 16 facing away from the truss structure, and the connecting shafts 17 are rotatably connected to support rods 19 perpendicular to them. The ends of the support rods 19 are rotatably connected to support shafts 18 parallel to the connecting shafts 17, and the support shafts 18 are fixedly connected to the side walls of the adjustment groove.

[0035] Through the cooperation of the connecting shaft 17, the supporting rod 19 and the supporting shaft 18, the closing plate 16 can move in any direction on the plane while keeping close contact with the rib plate 4, avoiding the deflection of the limiting connecting rod.

[0036] In this embodiment, the connecting rod includes a fixed rod 20, one end of which is connected to the longitudinal beam 7 by a ball joint, and the other end of the fixed rod 20 passes through a connecting hole and extends into the adjusting groove and is sleeved with a moving rod 21, and the other end of the fixed rod 20 is provided with a thread; the other end of the moving rod 21 is coaxially rotatably provided with a rotating rod 22 connected to the sliding seat 12 by a ball joint, and the end of the moving rod 21 is hinged with a plurality of clamping plates 23 for clamping the fixed rod 20, and a torsion spring (which belongs to conventional technical means and is not drawn in the figure) is provided at the hinge, and the contact end surface of the clamping plate 23 and the fixed rod 20 is provided with a thread matching the threaded rod, and the moving rod 21 is slidably sleeved with a sleeve 24; the driving structure includes a support 9 detachably connected to one side of the adjusting groove, and the support 9 is provided with a plurality of driving units, and the driving unit includes a vertically arranged slide rail 25, and the slide rail 25 is slidably connected with a guide seat 26 The guide seat 26 is provided with a power structure for driving the movement thereof (in this embodiment, the power structure is driven by a motor, which is a conventional technical means, so it is not drawn in the figure). A telescopic rod 27 facing the moving rod 21 is welded and fixed on the guide seat 26. The end of the telescopic rod 27 is connected with an adjusting seat 28 by a ball joint, and a reset elastic member is provided between the adjusting seat 28 and the telescopic rod 27. The reset elastic member is used to keep the seat body 10 in a horizontal state without other external forces (which is a conventional technical means, so it is not drawn in the figure). The end of the adjusting seat 28 is symmetrically hinged with an arc plate 29 for clamping the moving rod 21, and a torsion motor is hingedly provided (which is a conventional technical means, so it is not drawn in the figure). The inner arc surface of the arc plate 29 is provided with an installation groove, and a driving motor 30 is provided in the installation groove. The output end of the driving motor 30 is provided with a driving gear 31 meshing with the outer wall of the moving rod 21.

[0037] In this solution, the detachable connection between the driving structure and the rib plate 4 enables the driving structure to be recycled; in addition, through the driving unit of the driving structure, the deflection and extension of each connecting rod can be accurately controlled, and the side plate 2 can be more accurately controlled to restore the deformation. Before pouring, the driving structure is inserted into the adjustment groove and fixed to the rib plate 4, and then the guide seat 26 is driven to slide by the power structure so that the guide seat 26 is directly opposite to the corresponding moving rod 21, and then the telescopic rod 27 is controlled to extend so that the arc plate 29 at the end of the adjustment seat 28 moves to the upper and lower sides of the moving rod 21, and then the torsion motor is controlled to rotate forward so that the arc plate 29 is close to the moving rod 21 but the driving gear 31 is not engaged with the moving rod 21; during the solidification process of concrete, if the side plate 2 is deformed, the guide seat 26 is driven to slide and the telescopic rod 27 is extended and retracted by controlling the power structure in the adjacent area, and the arc plate 29 clamps the moving rod 21, thereby driving the deflection of the connecting rod, and the connecting rod slides through the slide 12 and drives the guide rail 13 to deflect, so that the slide 12 is in the deformation area or close to the deformation area, and then the power structure is closed and The extension and retraction of the telescopic rod 27 limits the direction of the connecting rod; at this time, the control torsion motor continues to rotate forward so that the arc plate 29 fits on the moving rod 21, and the driving gear 31 engages with the moving rod 21, and then the control push rod 32 is extended, and the push rod 32 pushes the sleeve 24 to the clamping plate, so that the thread on the clamping plate cooperates with the thread at the end of the fixed rod 20, and then the drive motor 30 is started, and the drive motor 30 drives the moving rod 21 to rotate through the driving gear 31, and then controls the extension and retraction of the connecting rod to pull or push the deformation area, and turns off the drive motor 30 after the side plate 2 is restored to its deformation; after the concrete solidifies, the control push rod 32 is reset, and then the control torsion motor is reversed to reset the arc plate 29, and then the control telescopic rod 27 is shortened, and then the support 9 is taken out and recycled; then concrete is poured in the rib plate 4.

[0038] In this embodiment, a push rod 32 for pushing the sleeve 24 to move is disposed on the side wall of the arc-shaped plate 29 .

[0039] The push rod 32 is provided to push the sleeve 24 to move, so as to avoid the construction workers being unable to move the sleeve 24 due to the narrow space in the adjustment groove.

[0040] In this embodiment, the bottom plate 1, the side plate 2 and the end plate 3 are all printed.

[0041] Through the printing treatment, in combination with the ribs 4, the friction between the post-cast concrete and the shell is increased to avoid later delamination and cracking.

[0042] A construction invention of a UHPC composite beam structure includes the following steps:

[0043] 1) Prefabrication: In the factory, the bottom plate 1, the side plate 2 and the end plate 3 are integrally cast to form a shell; after curing, the guide rail 13 and the slide seat 12 are installed on the side plate 2, and the moving rod 21 and the rotating rod 22 are connected to the slide seat 12; then the rib plate 4 is cast, and after curing, the connecting seat and the closing plate 16 are installed, and then the threaded end of the fixing rod 20 is passed through the connecting ball and inserted into the moving rod 21;

[0044] 2) Install the combined beam: After hoisting the shell to the installation position, then hoist the truss structure, connect and fix the steel beam 5 with the end plate 3, and connect the end of the fixing rod 20 with the corresponding longitudinal beam 7 with a detachable ball joint; insert the driving structure into the adjustment groove and fix it to the rib plate 4, then drive the guide seat 26 to slide through the power structure, so that the guide seat 26 is facing the corresponding moving rod 21, and then control the telescopic rod 27 to extend, so that the arc plate 29 at the end of the adjustment seat 28 moves to the upper and lower sides of the moving rod 21, and then control the torsion motor to rotate forward, so that the arc plate 29 is close to the moving rod 21 but the driving gear 31 is not engaged with the moving rod 21;

[0045] 3) Initial pouring: pour concrete into the shell and vibrate it;

[0046] 4) Adjustment: During the solidification process of concrete, if the side plate 2 is deformed, the power structure in the adjacent area is controlled to drive the guide seat 26 to slide and the telescopic rod 27 to extend and retract, and the arc plate 29 clamps the moving rod 21, thereby driving the deflection of the connecting rod. The connecting rod slides through the slide 12 and drives the guide rail 13 to deflect, so that the slide 12 is in the deformation area or close to the deformation area, and then the power structure and the telescopic rod 27 are closed to limit the direction of the connecting rod; at this time, the torsion motor is controlled to continue to rotate forward, so that the arc plate 29 fits on the moving rod 21, and the driving gear 31 is engaged with the moving rod 21, and then the push rod 32 is controlled to extend, and the push rod 32 pushes the sleeve 24 to the clamping plate, so that the thread on the clamping plate is matched with the thread at the end of the fixed rod 20, and then the driving motor 30 is started, and the driving motor 30 drives the moving rod 21 to rotate through the driving gear 31, thereby controlling the extension and retraction of the connecting rod, so as to pull or push the deformation area, and the driving motor 30 is turned off after the side plate 2 is restored to its deformation;

[0047] 5) Secondary pouring: After the concrete solidifies, the push rod 32 is controlled to reset, and then the torsion motor is controlled to reverse to reset the arc plate 29, and then the telescopic rod 27 is controlled to shorten, and then the support 9 is taken out; then concrete is poured in the rib plate 4 and maintained.

[0048] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A UHPC composite beam structure, comprising a bottom plate and side plates arranged on both sides, wherein end plates connected to the side plates are arranged at both ends of the bottom plate, characterized in that: A plurality of ribs are arranged on the facing surfaces of the side plates, and the bottom, side plates, end plates and ribs are all made of UHPC. The truss structure also includes four rectangularly distributed steel beams, and the ends of the steel beams are connected to the corresponding end plates. A plurality of transverse beams are arranged between the laterally adjacent steel beams, and a plurality of longitudinal beams are arranged between the vertically adjacent steel beams. The longitudinal beams correspond to the ribs one by one, and a plurality of diagonal braces are obliquely arranged between adjacent longitudinal beams. A plurality of connecting seats are arranged on the ribs, and connecting rods are arranged between the connecting seats and the corresponding longitudinal beams.

2. A UHPC composite beam structure according to claim 1, characterized in that: The top of the rib plate is longitudinally provided with an adjustment slot connected to the side plate, and the side wall of the adjustment slot is penetrated by a plurality of through slots facing the truss structure. The connecting seat includes a seat body arranged in the through slot, and gaps are reserved between the seat body and the side wall of the through slot. The seat body is provided with a spherical cavity with two ends exposed from the seat body, and a mounting ball is rotatably arranged in the spherical cavity, and a connecting hole is provided on the mounting ball; the connecting rod is a telescopic structure, one end of the connecting rod passes through the corresponding connecting hole and is connected to the sliding seat by a ball joint, and the other end of the connecting rod is detachably connected to the corresponding side wall of the longitudinal beam by a ball joint; a plurality of guide rails slidably connected to the corresponding sliding seat are arranged in the adjusting slot, one end of the guide rail is rotatably connected to a rotating shaft connected to the side plate, an annular groove coaxial with the rotating shaft is correspondingly opened on the side wall, and a limit block slidably connected to the annular groove is fixed on the other end of the guide rail; a closing plate for blocking the chamber is sleeved on the seat body, and the closing plate is in contact with the side wall of the adjusting slot, and a driving structure for driving the connecting rod to swing and telescope is detachably connected in the adjusting slot.

3. A UHPC composite beam structure according to claim 2, characterized in that: Four connecting shafts distributed in a rectangular shape are fixed on the end surface of the closing plate facing away from the truss structure, and the connecting shafts are rotatably connected to support rods perpendicular to them. The ends of the support rods are rotatably connected to support shafts parallel to the connecting shafts, and the support shafts are fixedly connected to the side walls of the adjustment groove.

4. A UHPC composite beam structure according to claim 3, characterized in that: The connecting rod comprises a fixing rod, one end of which is connected to the longitudinal beam ball joint, the other end of which passes through a connecting hole and extends into an adjusting slot and is sleeved with a moving rod, and the other end of the fixing rod is provided with a thread; a rotating rod connected to the sliding seat ball joint is coaxially rotatably provided at the other end of the moving rod, a plurality of clamping plates for clamping the fixing rod are hinged at the end of the moving rod, and a torsion spring is provided at the hinge, and threads matching the threaded rod are provided on the contact end surface of the clamping plate and the fixing rod, and a sleeve is slidably sleeved on the moving rod; the driving structure comprises a support detachably connected to one side of the adjusting slot, and a plurality of driving The driving unit comprises a vertically arranged slide rail, each of which is slidably connected to a guide seat, each of which is provided with a power structure for driving the guide seat to move, a telescopic rod facing the moving rod is fixed on the guide seat, an adjusting seat is connected to the end of the telescopic rod by a ball joint, and a reset elastic member is provided between the adjusting seat and the telescopic rod, an arc plate for clamping the moving rod is symmetrically hinged at the end of the adjusting seat, and a torsion motor is hingedly provided, an installation groove is provided on the inner arc surface of the arc plate, a driving motor is provided in the installation groove, and a driving gear meshing with the outer wall of the moving rod is provided on the output end of the driving motor.

5. A UHPC composite beam structure according to claim 4, characterized in that: A push rod for pushing the sleeve to move is arranged on the side wall of the arc-shaped plate.

6. A UHPC composite beam structure according to claim 5, characterized in that: The bottom plate, side plates and end plates are all printed.

7. The construction invention of a UHPC composite beam structure according to claim 6 is characterized in that: The steps include: 1) Prefabrication: In the factory, the bottom plate, side plate and end plate are integrally cast to form a shell; after curing, the guide rails and slide seats are installed on the side plates, and the moving rod, rotating rod and slide seats are connected; the rib plate is then cast, and after curing, the connecting seat and closing plate are installed, and then the threaded end of the fixed rod is passed through the connecting ball and inserted into the moving rod; 2) Install the combined beam: After hoisting the shell to the installation position, hoist the truss structure, connect and fix the steel beam with the end plate, and connect the end of the fixed rod with the corresponding longitudinal beam with a detachable ball joint; insert the drive structure into the adjustment groove and fix it with the rib plate, and then drive the guide seat to slide through the power structure so that the guide seat is facing the corresponding moving rod, and then control the extension of the telescopic rod to move the arc plate at the end of the adjustment seat to the upper and lower parts of the moving rod, and then control the forward rotation of the torsion motor so that the arc plate is close to the moving rod but the drive gear is not engaged with the moving rod; 3) Initial pouring: pour concrete into the shell and vibrate it; 4) Adjustment: During the solidification of concrete, if the side plate is deformed, the power structure in the adjacent area is controlled to drive the guide seat to slide and the telescopic rod to extend and retract, and the arc plate clamps the moving rod, thereby driving the deflection of the connecting rod. The connecting rod slides through the slide and drives the guide rail to deflect, so that the slide is in the deformation area or close to the deformation area, and then the power structure and the telescopic rod are closed to limit the direction of the connecting rod; at this time, the torsion motor is controlled to continue to rotate forward, so that the arc plate fits on the moving rod, and the driving gear is engaged with the moving rod, and then the push rod is controlled to extend, and the push rod pushes the sleeve to the clamping plate, so that the thread on the clamping plate is matched with the thread at the end of the fixed rod, and then the drive motor is started. The drive motor drives the moving rod to rotate through the drive gear, and then controls the extension and retraction of the connecting rod, so as to pull or push the deformation area, and the drive motor is turned off after the side plate is restored to deformation; 5) Secondary pouring: After the concrete solidifies, control the push rod to reset, then control the torsion motor to reverse, reset the arc plate, then control the telescopic rod to shorten, and then take out the support; then pour concrete in the rib plate and maintain it.

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