Penetrating construction structure for unbonded prestressed tendons in slip-form construction

Abstract

The utility model relates to the technical field of strand pulling of unbonded prestressed tendons, in particular to a strand pulling construction structure of unbonded prestressed tendons in slip form construction. In order to solve the problem that follow-up operation is tedious in an existing strand pulling construction method for the unbonded prestressed tendons, the novel strand pulling construction structure for the unbonded prestressed tendons in slip-form construction is provided and comprises a C-shaped hard rubber strand pulling pipe which is fixed to a slip-form support through a plurality of fixing connecting frames, and the C-shaped hard rubber strand pulling pipe is connected with the C-shaped hard rubber strand pulling pipe. The inner wall of one end of a circumferential opening of the C-shaped hard rubber strand penetrating pipe extends to the other end of the circumferential opening in the circumferential direction to form an opening inner extending end, the outer wall of the other end of the opening of the C-shaped hard rubber strand penetrating pipe extends to one end of the circumferential opening in the circumferential direction to form an opening outer extending end, and a horizontal steel bar drag hook is arranged below each fixed connecting frame in a matched mode. When the construction structure is used for pulling the unbonded prestressed tendons, the pulling efficiency can be greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of non-bonded prestressed tendon bundle threading, in particular to a non-bonded prestressed tendon bundle threading construction structure in slipform construction. Background Art

[0002] The sliding membrane process is a construction technique currently used in concrete structure construction that boasts a high degree of mechanization, rapid construction, minimal site occupation, strong structural integrity, excellent seismic resistance, guaranteed safe operation, and significant environmental and economic benefits. The sliding membrane process includes not only tool-type formwork but also a hydraulic jack-powered lifting device and supporting construction structures. Concrete is poured in layers from the top of the formwork, with each layer generally no thicker than 30 cm. When the lowest layer of concrete in the formwork reaches a certain strength, the formwork slides upwards along the surface of the poured concrete, using the lifting device to continue pouring, in a continuous cycle until the silo wall reaches its designed height.

[0003] In the construction of silo wall sliding membrane, the construction of unbonded prestressed tendons is one of the main installation processes in the construction of silo wall sliding membrane. The traditional construction method of unbonded prestressed tendons is to manually lay unbonded prestressed tendons, which is labor-intensive for workers. There are also methods in the prior art that use a bundle threading machine and a bundle threading duct to achieve unbonded prestressed tendon bundle threading, such as the technical solution described in the patent with application number 202211136695.7, entitled "A Large Diameter Silo Unbonded Prestressed Steel for Sliding Membrane Construction". However, when the steel strand is passed through the end, the operator needs to use a hook to hook the steel strand out of the bundle threading duct and then pass it through the through hole corresponding to the anchor plate at the tensioning end, which makes the subsequent operation more cumbersome. Summary of the Invention

[0004] In order to solve the problem of complicated subsequent operations in the existing unbonded prestressed tendon bundle threading construction method, the utility model provides a new unbonded prestressed tendon bundle threading construction structure in slipform construction.

[0005] The utility model is realized by adopting the following technical solutions:

[0006] The construction structure for threading unbonded prestressed tendons in slipform construction includes multiple slipform gantries, tensioning end anchor pads, hydraulic jacks, horizontal steel bars, vertical steel bars, slipform climbing poles, and C-shaped hard rubber threading tubes for threading unbonded prestressed tendons through the gaps in the tensioning end anchor pads. A vertically arranged fixed connecting frame is fixed under the top arm of each slipform gantries. The C-shaped hard rubber threading tube is fixed to the slipform support through multiple fixed connecting frames. The circumferential opening of the C-shaped hard rubber threading tube is arranged downward. The inner wall of one end of the circumferential opening of the C-shaped hard rubber threading tube extends circumferentially to the other end to form an inner extension end of the opening. The outer wall of the other end of the opening of the C-shaped hard rubber threading tube extends circumferentially to one end to form an outer extension end of the opening. A horizontal steel bar hook is provided under each fixed connecting frame for supporting the unbonded prestressed tendons that have escaped from the circumferential opening of the C-shaped hard rubber threading tube.

[0007] During use, the unbonded prestressed tendons to be bundled are passed through the pores of the tensioning end anchor plate through the bundle threading machine, and the bundle threading is completed according to the trajectory of the C-type hard rubber bundle threading tube. Then, when the sliding formwork gantry slides, the fixed connecting frame and the C-type hard rubber bundle threading tube are lifted accordingly. Under the constraint of the tensioning end anchor plate, the unbonded prestressed tendons automatically escape from the circumferential opening of the C-type hard rubber bundle threading tube and fall on the horizontal steel bar hook. The horizontal steel bar hook itself is also a structural design required by the silo wall, and the structure of this application makes good use of it to support the unbonded prestressed tendons. The entire unbonded prestressed tendon bundle threading process only requires one person to assist in threading the unbonded prestressed tendons into the bundle threading machine at the beginning, and subsequently only needs to supervise its normal operation without the need for human cooperation in the bundle threading.

[0008] Furthermore, each horizontal steel bar hook is provided with a groove for receiving the unbonded prestressed tendons that have escaped from the circumferential opening of the C-shaped hard rubber bundle tube, thereby limiting the unbonded prestressed tendons. This structure also eliminates the need to tie the unbonded prestressed tendons after they have fallen off.

[0009] Furthermore, each fixed connecting frame includes a vertically arranged connecting rod and a C-shaped fixing frame fixedly connected to the bottom end of the connecting rod. The circumferential opening of the C-shaped fixing frame corresponds to the circumferential opening of the C-shaped hard rubber bundle tube, and the C-shaped hard rubber bundle tube is inserted into the C-shaped fixing frame. This makes the structure of the fixed connecting frame more specific and standardized.

[0010] Furthermore, the connecting rod and the C-shaped fixing frame are both made of steel bars.

[0011] Furthermore, the top end of the connecting rod is welded to the top arm of the sliding formwork portal, thereby ensuring the stability of the structure.

[0012] Furthermore, the distance between the C-type hard rubber bundle tube and the set outer wall of the silo is one-third of the thickness of the silo wall, and the distance between the groove on the horizontal steel bar hook and the set outer wall of the silo is one-third of the thickness of the silo wall, ensuring the installation requirements of non-bonded prestressed tendons.

[0013] The beneficial effects of the present invention are as follows: the use of the construction structure described in the present invention to thread unbonded prestressed tendons can greatly improve threading efficiency, reduce the labor intensity of construction workers, and reduce labor costs. In addition, the construction structure is simple and the manufacturing cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is an enlarged structural diagram of the fixed connecting frame and the C-shaped hard rubber bundle tube after assembly.

[0018] In the figure: 1-slipform gantry, 2-unbonded prestressed tendons, 3-silo wall, 4-hydraulic jack, 5-fixed connecting frame, 51-connecting rod, 52-C-type fixed frame, 6-slipform climbing pole, 7-horizontal steel bars, 8-vertical steel bars, 9-horizontal steel bar hooks, 10-groove, 11-C-type hard rubber bundle tube, 111-inner extension end of the opening, 112-outer extension end of the opening. DETAILED DESCRIPTION

[0019] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0020] In the description, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance. It should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, removable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms based on specific circumstances.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0023] like Figure 1 and Figure 2 As shown, the construction structure for threading unbonded prestressed tendons in slipform construction includes multiple slipform portal frames 1, tensioning end anchor pads, hydraulic jacks 4, horizontal steel bars 7, vertical steel bars 8, slipform climbing poles 6, and C-shaped hard rubber threading tubes 11 for threading unbonded prestressed tendons 2 through the pores of the tensioning end anchor pads. A vertically arranged fixed connecting frame 5 is fixed under the top arm of each slipform portal frame 1. The C-shaped hard rubber threading tube 11 is fixed to the slipform support 1 through multiple fixed connecting frames 5. The circumferential opening of the C-shaped hard rubber through-tube 11 is arranged downward, and the inner wall of one end of the circumferential opening of the C-shaped hard rubber through-tube 11 extends circumferentially to the other end to form an opening inner extension end 111, and the outer wall of the other end of the opening of the C-shaped hard rubber through-tube 11 extends circumferentially to one end to form an opening outer extension end 112. A horizontal steel bar hook 9 is provided under each fixed connecting frame 5 for supporting the unbonded prestressed tendons 2 that are detached from the circumferential opening of the C-shaped hard rubber through-tube 11.

[0024] During use, the unbonded prestressed tendons 2 to be bundled are passed through the pores of the tensioning end anchor plate through the bundle threading machine, and the bundle threading is completed according to the trajectory of the C-type hard rubber bundle threading tube 11. Then, when the sliding formwork gantry 1 slides, the fixed connecting frame 5 and the C-type hard rubber bundle threading tube 11 are lifted accordingly. Under the constraint of the tensioning end anchor plate, the unbonded prestressed tendons 2 automatically escape from the circumferential opening of the C-type hard rubber bundle threading tube 11 and fall on the horizontal steel bar hook 9 (the horizontal steel bar hook 9 itself is also a structural design required by the silo wall, and the structure of this application makes good use of it to support the unbonded prestressed tendons 2). The entire bundle threading process of the unbonded prestressed tendons 2 only requires one person to assist in threading the unbonded prestressed tendons 2 into the bundle threading machine at the beginning, and subsequently only needs to supervise its normal operation, and no human cooperation is required for the bundle threading.

[0025] In specific implementation, each horizontal steel bar hook 9 is provided with a groove 10 for receiving the unbonded prestressed tendons 2 that have escaped from the circumferential opening of the C-shaped hard rubber bundle tube 11, thereby limiting the position of the unbonded prestressed tendons 2. This structure also makes it unnecessary to tie the unbonded prestressed tendons 2 after they have fallen off.

[0026] In specific implementation, each fixed connecting frame 5 includes a vertically arranged connecting rod 51 and a C-shaped fixing frame 52 fixedly connected to the bottom end of the connecting rod. The circumferential opening of the C-shaped fixing frame 52 corresponds to the circumferential opening of the C-shaped hard rubber bundle tube 11, and the C-shaped hard rubber bundle tube 11 is inserted into the C-shaped fixing frame 52. The structure of the fixed connecting frame 5 is specific and standardized.

[0027] In a specific implementation, the connecting rod 51 and the C-shaped fixing frame 52 are both made of steel bars.

[0028] During specific implementation, the top end of the connecting rod 51 is welded to the top arm of the sliding formwork portal frame 1 to ensure the stability of the structure.

[0029] During specific implementation, the distance between the C-shaped hard rubber bundle tube 11 and the set outer wall of the silo is one-third of the thickness of the silo wall 3, and the distance between the groove 10 on the horizontal steel bar hook 9 and the set outer wall of the silo is one-third of the thickness of the silo wall 3, ensuring the installation requirements of the non-bonded prestressed tendons 2.

[0030] In this specific implementation, the circumferential opening width of the C-shaped hard rubber tube 11 is 70 mm, ensuring that the unbonded prestressed tendons 2 can smoothly fall off from the circumferential opening of the C-shaped hard rubber tube 11 after the sliding formwork gantry 1 slides up.

[0031] The above description is only a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Although detailed descriptions have been made with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents; and such modifications or replacements do not deviate from the essence of the corresponding technical solutions within the scope of the technical solutions of the embodiments, and they should all be covered by the scope of protection of the claims.

Claims

1. A construction structure for unbonded prestressed tendons in slipform construction, comprising a plurality of slipform gantries (1), tensioning end anchor pads, hydraulic jacks (4), horizontal reinforcements (7), vertical reinforcements (8), and slipform climbing rods (6), characterized in that: It also includes a C-shaped hard rubber bundle-penetrating tube (11) for passing the unbonded prestressed tendons (2) through the pores of the tensioning end anchor plate, a vertically arranged fixed connecting frame (5) is fixed below the top arm of each sliding door frame (1), the C-shaped hard rubber bundle-penetrating tube (11) is fixed to the sliding door frame (1) through multiple fixed connecting frames (5), the circumferential opening of the C-shaped hard rubber bundle-penetrating tube (11) is arranged downward, the inner wall of one end of the circumferential opening of the C-shaped hard rubber bundle-penetrating tube (11) extends circumferentially to the other end thereof to form an opening inner extension end (111), the outer wall of the other end of the opening of the C-shaped hard rubber bundle-penetrating tube (11) extends circumferentially to one end thereof to form an opening outer extension end (112), and a horizontal steel bar hook (9) is provided below each fixed connecting frame (5) for supporting the unbonded prestressed tendons (2) that are released from the circumferential opening of the C-shaped hard rubber bundle-penetrating tube (11).

2. The unbonded prestressed tendon bundle construction structure in slipform construction according to claim 1 is characterized in that: Each horizontal steel bar hook (9) is provided with a groove (10) for receiving the unbonded prestressed steel bar (2) that escapes from the circumferential opening of the C-shaped hard rubber bundle tube (11).

3. The unbonded prestressed tendon bundle construction structure in slipform construction according to claim 1 or 2, characterized in that: Each fixed connecting frame (5) includes a vertically arranged connecting rod (51) and a C-shaped fixing frame (52) fixedly connected to the bottom end of the connecting rod, the circumferential opening of the C-shaped fixing frame (52) corresponds to the circumferential opening of the C-shaped hard rubber through-beam tube (11), and the C-shaped hard rubber through-beam tube (11) is sleeved in the C-shaped fixing frame (52).

4. The structure for constructing unbonded prestressed tendons in slipform construction according to claim 3, characterized in that: The connecting rod (51) and the C-shaped fixing frame (52) are both made of steel bars.

5. The unbonded prestressed tendon bundle construction structure in slipform construction according to claim 4, characterized in that: The top end of the connecting rod (51) is welded to the top arm of the sliding door frame (1).

6. The unbonded prestressed tendon bundle construction structure in slipform construction according to claim 5, characterized in that: The distance between the C-shaped hard rubber bundle tube (11) and the set outer wall of the silo is one third of the thickness of the silo wall (3), and the distance between the groove (10) on the horizontal steel bar hook (9) and the set outer wall of the silo is one third of the thickness of the silo wall (3).

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