Construction method of prestressed prefabricated T beam

Abstract

The invention relates to a construction method of a prestressed prefabricated T-beam, which adopts a bottom pull rod and a top pull rod to fix and tie full-automatic movable hydraulic formworks on two sides, so that a steel formwork of the T-beam is fixed, and the concrete pouring quality and safety of the prefabricated T-beam are improved; the embedded steel plate gradient bidirectional adjusting device is adopted, the position and angle of the upper steel plate are adjusted through the adjusting screw rod, the installation position of the beam bottom steel plate is accurately adjusted, and the installation and positioning accuracy of the beam bottom steel plate is improved; the position of the tensioning jack is adjusted through the prestress tensioning support, the lifting support and the limiting wooden wedge are arranged in the middle of the prestress tensioning support to support the tensioning jack, the lifting cross beam is provided with the winch and the steel wire rope to adjust the position of the lifting support, and the T-beam prestress tensioning construction efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the field of civil engineering, and in particular relates to a construction method of a prestressed prefabricated T-beam. Background Art

[0002] At present, due to the needs of energy conservation, environmental protection and green development, bridge prefabrication and assembly technology has been widely promoted. As a common bridge type in bridge construction, in-depth research on its corresponding prefabrication and assembly technology has important theoretical and practical value. Prefabricated segmental T-beams can be produced in a large-scale, industrialized, streamlined and standardized manner. At the same time, transportation, matching installation and construction have become more convenient, making them more suitable for the rapid construction of urban bridges.

[0003] However, the conventional T-beam prefabrication construction method has the disadvantages of low efficiency of formwork installation construction, poor safety of concrete pouring and prestressing. Summary of the invention

[0004] The purpose of the invention is to overcome the deficiencies in the prior art and provide a construction method for a prestressed prefabricated T-beam.

[0005] The construction method of the prestressed prefabricated T-beam comprises the following steps:

[0006] Step 1: T-beam reinforcement binding: The reinforcement skeleton is bound on the T-beam pedestal. The upper part of the T-beam pedestal is used to adjust the installation position of the beam bottom steel plate through the pre-buried steel plate slope two-way adjustment device;

[0007] Step 2: T-beam formwork installation: Install the fully automatic mobile hydraulic formwork on the outside of the steel frame. The fully automatic mobile hydraulic formwork adjusts the position of the steel formwork through the jack, adjustment wedge and fixed support block;

[0008] Step 3: T-beam concrete pouring: pour concrete on the inside of the fully automatic mobile hydraulic formwork through the concrete pouring platform to form a T-beam;

[0009] Step 4: Prestressed tensioning construction: T-beams are prestressed using prestressed tensioning brackets.

[0010] Preferably, in step one, a steel frame is installed on the T-beam pedestal, a fully automatic mobile hydraulic formwork is installed on the outside of the steel frame, walking wheels are arranged at the bottom of the fully automatic mobile hydraulic formwork, and the fully automatic mobile hydraulic formwork is provided with outer columns, middle columns and inner columns from the outside to the inside, jacks, adjustment wedges and fixed support blocks are horizontally arranged on the inner columns to position and adjust the position of the steel formwork, and a concrete pouring platform is arranged on the top of the fully automatic mobile hydraulic formwork.

[0011] Preferably, in step one, the fully automatic movable hydraulic formwork is symmetrically arranged on the left and right sides of the T-beam, and a reserved steel casing is horizontally arranged on the T-beam base. A bottom pull rod is penetrated through the reserved steel casing to fix the fully automatic movable hydraulic formwork on the left and right sides of the T-beam; a top pull rod is arranged on the upper part of the outer columns on both sides of the fully automatic movable hydraulic formwork.

[0012] Preferably, in step one, a pre-buried steel plate slope bidirectional adjustment device is provided in the upper groove of the T-beam pedestal, a lower steel plate and a lower sleeve are provided at the lower part of the pre-buried steel plate slope bidirectional adjustment device, an upper steel plate and an upper sleeve are provided at the upper part of the pre-buried steel plate slope bidirectional adjustment device, and an adjusting screw is provided in the middle of the pre-buried steel plate slope bidirectional adjustment device to adjust the position and angle of the upper steel plate.

[0013] Preferably, in step four, the prestressed tensioning support includes a bottom beam, walking wheels, external columns and a lifting beam. A lifting support and a limiting wooden wedge are arranged in the middle of the prestressed tensioning support to support the tensioning jack. A winch and a wire rope are arranged on the lifting beam to adjust the position of the lifting support.

[0014] Preferably, in step two, edge channel steel and foam stop-grouting strips are provided on the outer side of the upper portion of the T-beam pedestal to seal the steel formwork.

[0015] A prestressed prefabricated T-beam is obtained by any of the above methods.

[0016] The beneficial effects of the present invention are:

[0017] 1) The present invention adopts a bottom tie rod and a top tie rod to fix the fully automatic movable hydraulic formwork on both sides of the tie rod, thereby fixing the steel formwork of the T-beam, thereby improving the quality and safety of the prefabricated T-beam concrete pouring.

[0018] 2) The present invention adopts a bidirectional adjustment device for the slope of the embedded steel plate, which adjusts the position and angle of the upper steel plate by adjusting the screw rod, and accurately adjusts the installation position of the bottom steel plate of the beam, thereby improving the installation positioning accuracy of the bottom steel plate of the beam.

[0019] 3) The present invention adopts a prestressed tensioning bracket to adjust the position of the tensioning jack, a lifting bracket and a limiting wooden wedge are arranged in the middle of the prestressed tensioning bracket to support the tensioning jack, a winch and a wire rope are arranged on the lifting beam to adjust the position of the lifting bracket, thereby improving the construction efficiency of the prestressed tensioning of the T-beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the construction structure diagram of prestressed prefabricated T beam;

[0021] Figure 2 It is the structural diagram of the T-beam pedestal;

[0022] Figure 3This is the structural diagram of the bidirectional slope adjustment device for the embedded steel plate;

[0023] Figure 4 This is the structural diagram of the prestressed tension support.

[0024] Explanation of reference numerals: 1, fully automatic mobile hydraulic formwork; 2, outer column; 3, attached vibrator; 4, distribution beam; 5, bottom beam; 6, walking wheel; 7, bottom tie rod; 8, reserved steel casing; 9, T-beam pedestal; 10, middle column; 11, adjustment wedge block; 12, fixed support block; 13, jack; 14, top beam; 15, fixing bolt; 16, gasket; 17, T-beam; 18, inner column; 19, top tie rod; 20, steel formwork; 21, edge channel steel; 22. Foam stop strip; 23. Bidirectional adjustment device for the slope of the embedded steel plate; 24. Lower steel plate; 25. Lower sleeve; 26. Adjusting screw; 27. Upper steel plate; 28. Upper sleeve; 29. ​​Prestressed tensioning bracket; 30. Steel wire rope; 31. Lifting bracket; 32. Limiting wooden wedge; 33. Tensioning jack; 34. Steel hinge wire; 35. Prestressed pipe; 36. Winch; 37. Lifting beam; 38. Steel reinforcement skeleton; 39. Concrete; 40. Concrete pouring platform. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with embodiments. The description of the following embodiments is only used to help understand the present invention. It should be noted that for ordinary persons in the art, without departing from the principle of the present invention, the present invention can also be modified in some ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0026] Embodiment 1

[0027] As an embodiment, the construction method of the prestressed prefabricated T-beam comprises the following steps:

[0028] Step 1: T-beam reinforcement binding: The reinforcement skeleton 38 is bound on the T-beam pedestal 9, and the upper part of the T-beam pedestal 9 is used to adjust the installation position of the beam bottom steel plate through the pre-buried steel plate slope bidirectional adjustment device 23;

[0029] Step 2, T-beam formwork installation: for the construction of prestressed prefabricated T-beam 17, a fully automatic mobile hydraulic formwork 1 is installed on the outside of the steel skeleton 38. The fully automatic mobile hydraulic formwork 1 is used to position and adjust the position of the steel formwork 20 through the jack 13, the adjustment wedge 11 and the fixed support block 12. A reserved steel casing 8 and a bottom tie rod 7 are set on the T-beam pedestal 9 to fix the lower part of the fully automatic mobile hydraulic formwork 1. The upper part of the fully automatic mobile hydraulic formwork 1 is fixed to the outer column 2 through the top tie rod 19, the fixing bolt 15 and the gasket 16. The steel formwork 20 is sealed on the outer side of the upper part of the T-beam pedestal 9 through the edge channel steel 21 and the foam stop slurry strip 22;

[0030] Step 3: T-beam concrete pouring: pouring concrete 39 on the inner side of the fully automatic movable hydraulic formwork 1 through the concrete pouring platform 40 to form a T-beam 17;

[0031] Step 4: T-beam maintenance construction: After the T-beam 17 concrete 39 is poured, the concrete 39 maintenance construction is carried out in time;

[0032] Step 5, prestressed tensioning construction: T-beam 17 is prestressed by using prestressed tensioning bracket 29, lifting beam 37 is provided with winch 36 and wire rope 30 to adjust the position of lifting bracket 31, and the middle part of prestressed tensioning bracket 29 supports tensioning jack 33 through lifting bracket 31 and limiting wooden wedge 32.

[0033] Embodiment 2

[0034] As another embodiment, this embodiment 2 proposes, based on the embodiment 1, a construction device for the construction method of the prestressed prefabricated T-beam, such as Figures 1 to 4 As shown, it mainly includes a fully automatic mobile hydraulic formwork 1, an attached vibrator 3, a walking wheel 6, a bottom tie rod 7, a reserved steel casing 8, a T-beam base 9, an adjustment wedge 11, a fixed support block 12, a jack 13, a T-beam 17, a top tie rod 19, a steel formwork 20, a steel skeleton 38, and concrete 39.

[0035] like Figure 1 As shown, the fully automatic mobile hydraulic formwork 1 is symmetrically fixed on both sides of the T-beam pedestal 9, and the steel formwork 20 is arranged inside the fully automatic mobile hydraulic formwork 1. The fully automatic mobile hydraulic formwork 1 is symmetrically arranged on the left and right sides of the T-beam 17, and a reserved steel casing 8 is horizontally arranged on the T-beam pedestal 9. A bottom tie rod 7 is penetrated in the reserved steel casing 8 to fix the fully automatic mobile hydraulic formwork 1 on the left and right sides of the T-beam 17; a top tie rod 19 is arranged on the upper part of the outer column 2 on both sides of the fully automatic mobile hydraulic formwork 1 for pulling.

[0036] For the construction of prestressed prefabricated T-beam 17, a steel frame 38 is installed on the T-beam pedestal 9, and a fully automatic mobile hydraulic formwork 1 is installed on the outside of the steel frame 38. A bottom crossbeam 5 and a walking wheel 6 are arranged at the lower part of the fully automatic mobile hydraulic formwork 1. An outer column 2, a middle column 10, an inner column 18, a distribution crossbeam 4 and a top crossbeam 14 are arranged in the middle of the fully automatic mobile hydraulic formwork 1. A reserved steel casing 8 is arranged on the T-beam pedestal 9. A bottom pull rod 7 is arranged in the middle of the fully automatic mobile hydraulic formwork 1 for fixing. A jack 13, an adjusting wedge block 11 and a fixed support block 12 are arranged on the fully automatic mobile hydraulic formwork 1 to position and adjust the position of the steel formwork 20. A top pull rod 19, a fixing bolt 15 and a gasket 16 are arranged on the upper part of the fully automatic mobile hydraulic formwork 1 to fix the outer column 2. A concrete pouring platform 40 is arranged on the upper part of the fully automatic mobile hydraulic formwork 1. Concrete 39 is poured on the inner side of the fully automatic mobile hydraulic formwork 1 to form a T-beam 17.

[0037] like Figure 2 As shown, an edge channel steel 21 and a foam stop grout strip 22 are arranged on the outer side of the upper portion of the T-beam pedestal 9 to seal the steel formwork 20 .

[0038] like Figure 3 As shown, a pre-embedded steel plate slope bidirectional adjustment device 23 is arranged on the upper part of the T-beam pedestal 9, a lower steel plate 24 and a lower sleeve 25 are arranged at the lower part of the pre-embedded steel plate slope bidirectional adjustment device 23, an upper steel plate 27 and an upper sleeve 28 are arranged at the upper part of the pre-embedded steel plate slope bidirectional adjustment device 23, and an adjusting screw 26 is arranged in the middle of the pre-embedded steel plate slope bidirectional adjustment device 23 to adjust the position and angle of the upper steel plate 27.

[0039] like Figure 4 As shown, the T-beam 17 is prestressed by a prestressed tensioning bracket 29. The prestressed tensioning bracket 29 is provided with a bottom cross beam 5, a walking wheel 6, an outer column 2 and a lifting cross beam 37. A lifting bracket 31 and a limiting wooden wedge 32 are provided in the middle of the prestressed tensioning bracket 29 to support the tensioning jack 33. The lifting cross beam 37 is provided with a winch 36 and a wire rope 30 to adjust the position of the lifting bracket 31.

[0040] It should be noted that the parts in this embodiment that are the same or similar to those in the first embodiment can be referenced to each other and will not be described in detail in this application.

[0041] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

Claims

1. A construction method for prestressed prefabricated T-beams, characterized in that: The following steps are involved: Step 1: T-beam reinforcement binding: The reinforcement skeleton is bound on the T-beam pedestal. The upper part of the T-beam pedestal is used to adjust the installation position of the beam bottom steel plate through the pre-buried steel plate slope two-way adjustment device; Step 2: T-beam formwork installation: Install the fully automatic mobile hydraulic formwork on the outside of the steel frame. The fully automatic mobile hydraulic formwork adjusts the position of the steel formwork through the jack, adjustment wedge and fixed support block; Step 3: T-beam concrete pouring: pour concrete on the inside of the fully automatic mobile hydraulic formwork through the concrete pouring platform to form a T-beam; Step 4: Prestressed tensioning construction: T-beams are prestressed using prestressed tensioning brackets.

2. The construction method of prestressed prefabricated T-beam according to claim 1, characterized in that: In step one, a steel frame is installed on the T-beam pedestal, a fully automatic mobile hydraulic formwork is installed on the outside of the steel frame, walking wheels are arranged at the bottom of the fully automatic mobile hydraulic formwork, and the fully automatic mobile hydraulic formwork is provided with outer columns, middle columns and inner columns from the outside to the inside, jacks, adjustment wedges and fixed support blocks are horizontally arranged on the inner columns to position and adjust the position of the steel formwork, and a concrete pouring platform is arranged on the top of the fully automatic mobile hydraulic formwork.

3. The construction method of prestressed prefabricated T-beam according to claim 1, characterized in that: In step one, the fully automatic movable hydraulic formwork is symmetrically arranged on the left and right sides of the T-beam, and a reserved steel casing is horizontally arranged on the T-beam base. A bottom pull rod is penetrated through the reserved steel casing to fix the fully automatic movable hydraulic formwork on the left and right sides of the T-beam; a top pull rod is arranged on the upper part of the outer columns on both sides of the fully automatic movable hydraulic formwork.

4. The construction method of prestressed prefabricated T-beam according to claim 1, characterized in that: In step one, a pre-buried steel plate slope bidirectional adjustment device is provided in a groove on the upper part of the T-beam pedestal, a lower steel plate and a lower sleeve are provided at the lower part of the pre-buried steel plate slope bidirectional adjustment device, an upper steel plate and an upper sleeve are provided at the upper part of the pre-buried steel plate slope bidirectional adjustment device, and an adjusting screw is provided in the middle of the pre-buried steel plate slope bidirectional adjustment device to adjust the position and angle of the upper steel plate.

5. The construction method of prestressed prefabricated T-beam according to claim 1, characterized in that: In step four, the prestressed tensioning support includes a bottom beam, walking wheels, outer columns and a lifting beam. A lifting support and a limiting wooden wedge are set in the middle of the prestressed tensioning support to support the tensioning jack. A winch and a wire rope are set on the lifting beam to adjust the position of the lifting support.

6. The construction method of prestressed prefabricated T-beam according to claim 1, characterized in that: In step two, edge channel steel and foam stop strips are set on the outer side of the upper part of the T-beam base to seal the steel formwork.

7. Prestressed prefabricated T-beam, characterized in that: Obtained by the method according to any one of claims 1 to 6.

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