Pre-stress tensioning and fastening device for through arch bridge

Abstract

The utility model provides a through arch bridge prestress tension fastening device, which belongs to the field of prestress tension equipment and comprises a bridge floor device, a cable rod, a permanent cable head, a jack device, a detachable clamping piece device and a cable head device, the cable rod penetrates through the bridge floor device, the permanent cable head is fixedly connected with the cable rod, and the detachable clamping piece, the bridge floor device and the cable rod are concentrically arranged in parallel. A jack device is arranged between the bridge deck device and the detachable clamping piece device, the cable rod penetrates through the detachable clamping piece device and is connected and fastened with the fastening cable head, and the cable rod, the bridge deck device and the permanent cable head act together to provide bearing reaction force for jack tensioning. The device is light in weight, can be carried and constructed without assistance of hoisting equipment, is portable, is simple to operate, can achieve the effect without a complicated structural form, is convenient for workers to construct, can be recycled and reused, reduces the use of materials, and can temporarily lock the cable force value during the prestress tension construction of the cable rod.

Description

Technical Field

[0001] The utility model relates to the field of prestressed tensioning equipment, in particular to a prestressed tensioning and fastening device for a through arch bridge. Background Art

[0002] The through arch bridge has good mechanical properties, aesthetics and reliability, and can better bear the load of long-span bridges. In the actual construction process, in order to improve the stability of the arch rib and the overall bridge body, cable struts are usually used to connect the arch rib and the deck system.

[0003] However, during the long-term use, the cable struts may have insufficient tension, which affects the safety of the bridge. Therefore, prestress control technology is needed to control the prestress of the cable struts to ensure that they reach the control value required by the design, ensure the bearing capacity and control accuracy of the cable strut tensioning, and ensure the safety and long-term service performance of the bridge. Therefore, it is necessary to design a simple, portable and mechanically detachable prestressed fastening device, which can save costs, time and effort. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a prestressed tensioning and fastening device for a through arch bridge, so as to solve the technical problem that the cable force value cannot be temporarily locked during the prestressed tensioning construction of the existing bridge cable struts.

[0005] In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0006] The prestressed tensioning and fastening device for a through arch bridge includes a deck device, a cable strut, a permanent cable head, a jack device, a detachable clamping device and a cable head device. The cable strut passes through the deck device, the permanent cable head is connected to the cable strut, the detachable clamping device is arranged parallel to the deck device, a jack device is arranged between the deck device and the detachable clamping device, and the cable head device passes through the detachable clamping device and is connected to the permanent cable head. The detachable clamping device is arranged concentrically and parallel to the cable strut and the deck device.

[0007] Further, the deck device includes a deck component and a bridge body reinforcement plate. The cable strut passes through the deck component, and several bridge body reinforcement plates are arranged at intervals on the outer side of the deck component.

[0008] Further, the jack device includes two jacks. The two jacks are respectively arranged on both sides of the permanent cable head. One end of each of the two jacks is in contact connection with the deck component, and the other end of each of the two jacks is connected to the detachable clamping device.

[0009] Further, jack limit heads are arranged at the joints of the jacks and the deck component and the detachable clamping device respectively, and the jack limit heads limit and fix the jacks.

[0010] Further, the detachable clip device includes two detachable clips. The two detachable clips are tightened and fixed by setting fastening bolts. A cable rod hole is provided at the connection of the two detachable clips, and the cable head device is arranged through the cable rod hole.

[0011] Further, the detachable clip is arranged in an I-shaped structure, and clip reinforcing ribs are arranged on the I-shaped structure.

[0012] Further, the cable head device includes a cable head and a threaded cable rod. The cable head is connected to the permanent cable head. The threaded cable rod is sleeved inside the cable head, and the end of the threaded cable rod is provided with a cable rod head with a threaded structure. The fastening cable head and the permanent cable head are connected to the threaded cable rod, and are respectively sleeved on the lower side of the bridge deck structure and the device, and jointly provide the prestress tension reaction force with the bridge deck device and the fastening device. The threaded cable rod passes through the detachable clip device and is connected to the fastening cable head.

[0013] By observing the elongation of the jack and the gap between the fastening cable head and the clip device, the elongation data can be quickly read out for detection.

[0014] The threaded cable rod passes through the bridge deck device and is connected to the permanent cable head and the cable rod. The detachable clip device is arranged concentrically and parallel to the threaded cable rod of the bridge deck device. A jack device is symmetrically arranged between the bridge deck device and the detachable clip device. The threaded cable rod passes through the detachable clip device and is connected to the fastening cable head.

[0015] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0016] The utility model is light in weight, does not require auxiliary lifting equipment for handling and construction, is relatively portable, has simple operation, can achieve the effect without complex structural forms, is convenient for workers to construct, can be recycled repeatedly, reduces material use, and can temporarily lock the cable force value during the prestress tension construction of the cable rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the prestress tension fastening device of the utility model;

[0018] Figure 2 is Figure 1 the A-A structural schematic diagram of;

[0019] Figure 3 is Figure 1 the B-B structural schematic diagram of.

[0020] In the drawings, 1 - detachable clip, 2 - fastening bolt, 3 - fastening cable head, 4 - jack limit head, 5 - cable rod, 6 - bridge deck component, 7 - bridge body reinforcing plate, 8 - jack, 9 - permanent cable head, 10 - clip reinforcing rib, 11 - threaded cable rod, 12 - cable rod hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the following provides preferred embodiments with reference to the accompanying drawings to further elaborate on the present utility model in detail. However, it should be noted that many details listed in the specification are only for enabling the reader to have a thorough understanding of one or more aspects of the present utility model, and these aspects of the present utility model can be implemented even without these specific details.

[0022] As Figures 1-3 shown, the prestressed tensioning and fastening device for a through arch bridge includes a bridge deck device, a cable rod 5, a permanent cable head 9, a jack device, a detachable clamping device and a cable head device. The cable rod 5 passes through the bridge deck device, the permanent cable head 9 is connected to the cable rod 5, the detachable clamping device is arranged parallel to the bridge deck device, a jack device is arranged between the bridge deck device and the detachable clamping device, and the cable head device passes through the detachable clamping device and is connected to the permanent cable head 9. There are two detachable clamping pieces 1, which are fastened by fastening bolts. The fastening cable head 3 is located at the lower flange of the detachable clamping piece 1 for locking the cable head, and the upper flange has limit heads 4 of prestressed jacks symmetrically arranged on both left and right sides.

[0023] In the embodiment of the present invention, the bridge deck device includes a bridge deck member 6 and a bridge body reinforcement plate 7. The cable rod 5 passes through the bridge deck member 6, and several bridge body reinforcement plates 7 are arranged at intervals outside the bridge deck member 6.

[0024] In the embodiment of the present invention, the jack device includes two jacks 8. The two jacks 8 are respectively arranged on both sides of the permanent cable head 9. One end of each of the two jacks 8 is in contact connection with the bridge deck member 6, and the other end of each of the two jacks 8 is connected to the detachable clamping device.

[0025] In the embodiment of the present invention, jack limit heads 4 are arranged at the connection positions of the jacks 8 with the bridge deck member 6 and the detachable clamping device respectively, and the jack limit heads 4 limit and fix the jacks 8.

[0026] In the embodiment of the present invention, the detachable clamping device includes two detachable clamping pieces 1. The two detachable clamping pieces 1 are tightened and fixed by arranging fastening bolts 2. A cable rod hole 12 is arranged at the connection position of the two detachable clamping pieces 1, and the cable head device passes through the cable rod hole 12. The detachable clamping piece 1 is arranged in an I-shaped structure, and clamping piece reinforcing ribs 10 are arranged on the I-shaped structure. The threaded cable rod passes through the cable rod hole and is connected to the fastening cable head.

[0027] In the embodiment of the present invention, as Figure 1As shown in the figure, the cable head device includes a fastening cable head 3 and a threaded cable rod 11. The fastening cable head 3 is connected to the permanent cable head 9. The threaded cable rod 11 is sleeved inside the fastening cable head 3. The end of the threaded cable rod 11 is provided with a cable rod head with a threaded structure, which is respectively sleeved on the lower side of the bridge deck structure and the device, and jointly provides a prestressed tension reaction force with the bridge deck device and the fastening device.

[0028] The device respectively has two detachable clamping pieces on the left and right. Cable rod holes for the cable rod to pass through are respectively provided on the upper and lower flange plates of the clamping pieces. Before the prestress tension of the cable rod, the left and right clamping pieces are used to clamp the cable head, and it is fixed with fastening bolts. The threaded cable head is screwed into the thread of the cable rod head to perform initial locking. The prestressing jack is placed in the jack cable head between the clamping piece and the bridge deck system. The cable rod and the bridge deck component are fastened with a permanent cable head. The jack applies prestress, the cable rod is pulled up, the cable force value is locked with the permanent cable head, the jack is unloaded and returned to the initial jacking stroke position. The cable head on the lower flange of the device is tightened to make it fit closely with the jack. One cycle of prestress construction is completed, and it is repeated until the prestress reaches the design value, and the construction is completed.

[0029] The advantages of this device are light weight, no need for lifting equipment assistance during handling and construction, relatively portable, simple operation, and the effect can be achieved without complex structural forms, which is convenient for workers to construct, can be used repeatedly, and reduces material use.

[0030] This device can also be used on a half-through steel arch bridge, and the usage process is the same.

[0031] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A prestressed tensioning and fastening device for a through arch bridge, characterized in that: The invention comprises a bridge deck device, a cable rod (5), a permanent cable head (9), a jack device, a detachable clip device and a cable head device, wherein the cable rod (5) passes through the bridge deck device, the permanent cable head (9) is connected to the cable rod (5), the detachable clip device is arranged in parallel with the bridge deck device, a jack device is arranged between the bridge deck device and the detachable clip device, and the cable head device passes through the detachable clip device and is connected to the permanent cable head (9).

2. The prestressed tensioning and fastening device for a through arch bridge according to claim 1 is characterized in that: The bridge deck device comprises a bridge deck component (6) and a bridge body reinforcement plate (7), the cable rod (5) is arranged through the bridge deck component (6), and a plurality of bridge body reinforcement plates (7) are arranged at intervals on the outer side of the bridge deck component (6).

3. The prestressed tensioning and fastening device for a through arch bridge according to claim 2 is characterized in that: The jack device comprises two jacks (8), which are symmetrically arranged on both sides of the permanent cable head (9), one end of the two jacks (8) is in contact with the bridge deck component (6), and the other end of the two jacks (8) is connected to the detachable clip device.

4. The prestressed tensioning and fastening device for a through arch bridge according to claim 3 is characterized in that: A jack limit head (4) is provided at the connection points between the jack (8) and the bridge deck component (6) and the detachable clip device, and the jack limit head (4) limits and fixes the jack (8).

5. The prestressed tensioning and fastening device for a through arch bridge according to claim 1 is characterized in that: The detachable clip device comprises two detachable clips (1), the two detachable clips (1) are tightened and fixed by means of fastening bolts (2), a cable rod hole (12) is provided at the connection between the two detachable clips (1), and the cable head device is arranged through the cable rod hole (12).

6. The prestressed tensioning and fastening device for a through arch bridge according to claim 5, characterized in that: The detachable clip (1) is arranged as an I-shaped structure, and a clip reinforcement rib (10) is arranged on the I-shaped structure.

7. The prestressed tensioning and fastening device for a through arch bridge according to claim 6 is characterized in that: The cable head device comprises a fastening cable head (3) and a threaded cable rod (11). The fastening cable head (3) is connected to the permanent cable head (9). The threaded cable rod (11) is sleeved inside the fastening cable head (3). The end of the threaded cable rod (11) is arranged as a cable rod head with a threaded structure.

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