Quick positioning device for cable guide pipe of cable-stayed bridge

Abstract

The utility model discloses a quick positioning device for a cable conduit of a cable-stayed bridge. The lower portion of the front end of the cable guide pipe and the lower portion of the rear end of the cable guide pipe are each provided with a cable guide pipe positioning mechanism, each cable guide pipe positioning mechanism comprises a vertical adjusting device and a horizontal adjusting device, and each vertical adjusting device comprises a vertical steel pipe and an adjustable support arranged at the upper end of the vertical steel pipe. The adjustable support comprises a screw, an adjusting nut in threaded connection with the screw and a U-shaped supporting plate fixed to the top end of the screw, a bottom plate is fixed to the bottom end of the vertical steel pipe, the lower end of the screw is inserted into the vertical steel pipe, and channel steel supports are fixed to the lower portion of the front end and the lower portion of the rear end of the cable guide pipe correspondingly. The lower end of the channel steel support is hinged to a U-shaped supporting plate of the adjustable support through a steel shaft, the horizontal adjusting device comprises two horizontal adjusting screw rods, the two horizontal adjusting screw rods are in threaded connection to two limb plates of the U-shaped supporting plate of the adjustable support respectively, and the horizontal adjusting screw rods are located below the steel shaft. The two horizontal adjusting screw rods make contact with the two sides of the channel steel support respectively.

Description

Technical Field

[0001] This utility model relates to a cable-stayed bridge cable guide positioning device, which is mainly used for the placement and positioning of cable guides in the cable-stayed bridge body and tower column. Background Technology

[0002] Cable-stayed bridges are a widely used type of bridge structure. The cable guides are responsible for transferring the bridge deck load to the bridge towers from the stay cables. Their positioning accuracy and construction quality are directly related to the safety of the entire cable-stayed bridge.

[0003] Currently, the positioning methods for cable-stayed bridge cable guides mainly include two stages: rough layout and fine adjustment. During construction, it is necessary to erect steel structure supports and use cranes or hand-operated hoists to adjust the spatial position of the cable guides. This adjustment method is not easy to quickly and accurately position, requires repeated adjustments, has a long adjustment time, and low construction efficiency. Utility Model Content

[0004] In view of the above-mentioned defects in the existing technology, the present invention provides a cable-stayed bridge cable duct positioning device with simple structure and capable of quickly and efficiently positioning the cable duct.

[0005] This utility model is achieved through the following technical solution: a rapid positioning device for cable-stayed bridge cable guide tubes, characterized in that: a cable guide tube positioning mechanism is respectively provided at the lower front end and lower rear end of the cable guide tube, the cable guide tube positioning mechanism includes a vertical adjustment device and a horizontal adjustment device, the vertical adjustment device includes a vertical steel pipe and an adjustable support set at the upper end of the vertical steel pipe, the adjustable support includes a screw, an adjusting nut threadedly connected to the screw, and a U-shaped support plate fixedly set at the top of the screw, the bottom end of the vertical steel pipe is fixed with a base plate, the lower end of the screw is inserted into the vertical steel pipe, and a channel steel bracket is fixed at the lower front end and lower rear end of the cable guide tube, the lower end of the channel steel bracket is hinged to the U-shaped support plate of the adjustable support through a steel shaft, the horizontal adjustment device includes two horizontal adjusting screw rods, the two horizontal adjusting screw rods are respectively threadedly connected to the two limbs of the U-shaped support plate of the adjustable support, and the horizontal adjusting screw rods are located below the steel shaft, the two horizontal adjusting screw rods are respectively in contact with the two sides of the channel steel bracket.

[0006] In this invention, the vertical adjustment device of the cable guide positioning mechanism can raise and lower the adjustable support screw by rotating its adjusting nut, thus achieving vertical adjustment and allowing for vertical adjustment of the front or rear end of the cable guide. The horizontal adjustment device of the cable guide positioning mechanism can push the channel steel bracket along the steel shaft by rotating the horizontal adjusting screws on both sides of the U-shaped support plate, thus achieving horizontal adjustment of the front or rear end of the cable guide. The two sets of cable guide positioning mechanisms located at the lower front and rear ends of the cable guide allow for precise adjustment of the spatial position of the cable guide.

[0007] Furthermore, the vertical steel pipe is a φ60 steel pipe; the channel steel support is made of 5# channel steel; and the steel shaft is made of φ20 round steel.

[0008] Furthermore, the bottom end of the vertical steel pipe in the cable guide positioning mechanism at the main tower cable guide is welded and fixed to the stiffening frame of the main tower.

[0009] Furthermore, the bottom end of the vertical steel pipe in the cable guide positioning mechanism at the beam is supported on the bottom formwork of the beam.

[0010] The beneficial effects of this utility model are: This utility model has a simple structure. By setting two sets of cable guide positioning mechanisms at the lower front end and lower rear end of the cable guide, the spatial position of both ends of the cable guide can be arbitrarily adjusted. The vertical position adjustment and the horizontal position adjustment are both convenient and fast, which can realize the rapid positioning of the cable guide and the high construction efficiency. Moreover, since the vertical adjustment device and the horizontal adjustment device of the cable guide positioning mechanism are both threaded, the adjustment is accurate and can realize the rapid and precise positioning of the cable guide. Attached Figure Description

[0011] Figure 1 This is a schematic diagram showing the location of the cable guide pipes for a cable-stayed bridge;

[0012] Figure 2 This is a schematic diagram of the positioning device for the main tower cable guide tube in a specific implementation method;

[0013] Figure 3 yes Figure 2 AA direction diagram in the middle;

[0014] Figure 4 yes Figure 2 BB-direction diagram in the middle;

[0015] Figure 5 This is a schematic diagram of the positioning device for the beam cable guide tube in a specific implementation method;

[0016] Figure 6 yes Figure 5 A schematic diagram of the CC direction in the diagram;

[0017] Figure 7 yes Figure 5 DD direction diagram in the middle;

[0018] In the diagram, 1. Main tower cable guide pipe, 2. Stay cable, 3. Beam cable guide pipe, 4. Stiffened frame, 5. Vertical steel pipe, 6. Adjustable support, 7. Base plate, 8. Channel steel support, 9. Steel shaft, 10. Horizontal adjusting screw rod, 11. Concrete pad, 12. Beam bottom formwork;

[0019] 6.1 Adjusting nut, 6.2 Screw, 6.3 U-shaped support plate. Detailed Implementation

[0020] The present invention will be further described below through non-limiting embodiments and in conjunction with the accompanying drawings:

[0021] As attached Figure 1 The diagram shown is a schematic representation of the location of the cable ducts in a cable-stayed bridge. The cable ducts in a cable-stayed bridge include the main tower cable duct 1 and the beam cable duct 3.

[0022] As attached Figures 2-4 The diagram shows a positioning device for the main tower cable guide duct. A cable guide positioning mechanism is installed at the lower front end and lower rear end of the main tower cable guide duct 1. The positioning mechanism includes a vertical adjustment device and a horizontal adjustment device. The vertical adjustment device includes a vertical steel pipe 5 and an adjustable support 6 located at the upper end of the vertical steel pipe 5. The adjustable support 6 includes a screw 6.2, an adjusting nut 6.1 threaded onto the screw 6.2, and a U-shaped support plate 6.3 fixedly welded to the top of the screw 6.2, with the opening of the U-shaped support plate 6.3 facing upwards. A base plate 7 is welded to the bottom end of the vertical steel pipe 5. In this embodiment, the vertical steel pipe 5 is a φ60 steel pipe, and the base plate 7 is a 100×100mm steel plate. The lower end of the screw 6.2 is inserted into the upper end of the vertical steel pipe 5. The lower front and lower rear ends of the main tower cable guide 1 are both fixedly connected to channel steel supports 8. The channel steel supports 8 are made of #5 channel steel. The upper end of the channel steel supports 8 is fixedly connected to the main tower cable guide 1. Shaft holes are provided on the two lower limb plates of the channel steel supports 8. A horizontal steel shaft 9 is fixedly installed between the two limb plates of the U-shaped support plate 6.3 of the adjustable support 6. The steel shaft 9 is made of φ20 round steel. The lower end of the channel steel supports 8 passes through its shaft holes onto the steel shaft 9 and is hinged to the U-shaped support plate 6.3 of the adjustable support. The horizontal adjustment device includes two horizontal adjusting screw rods 10, which are threadedly connected to the two limb plates of the U-shaped support plate 6.3 of the adjustable support 6, and are located below the steel shaft 9. The two horizontal adjusting screw rods 10 are in contact with the two limb plates of the channel steel supports 8. The bottom end of the vertical steel pipe 5 is welded and fixed to the stiffening frame 4 of the main tower.

[0023] The vertical adjustment device of the cable guide positioning mechanism is used for vertical adjustment. By rotating the adjusting nut 6.1, the screw 6.2 of the adjustable support 6 can be raised or lowered, thereby achieving vertical adjustment. This allows for vertical adjustment of the front or rear end of the cable guide. The horizontal adjustment device of the cable guide positioning mechanism is used for horizontal adjustment. By rotating the horizontal adjusting screws 10 on both sides of the U-shaped support plate 6.3, the channel steel bracket 8 can be pushed horizontally along the steel shaft 9, thereby achieving horizontal adjustment of the front or rear end of the cable guide. The two sets of cable guide positioning mechanisms at the front and rear ends of the cable guide allow for precise adjustment of the spatial position of the cable guide.

[0024] The main tower cable guide pipe positioning construction includes the following steps:

[0025] Step 1: Roughly locate the position of the main tower cable guide tube. On the stiffening frame 4, roughly locate the position of the main tower cable guide tube 1, with the vertical error controlled within 30cm and the horizontal error controlled within 10cm.

[0026] Step 2: Weld vertical steel pipes 5 and bottom plates 7 to the front and rear ends of the main tower cable guide tubes on the stiffening frame 4 respectively, and insert adjustable supports 6 inside the vertical steel pipes 5.

[0027] Step 3: Weld channel steel supports 8 at the lower front end and lower rear end of the main tower cable guide 1, corresponding to the vertical steel pipe 5, and connect them to the U-shaped support plate 6.3 at the top of the adjustable support 6 via steel shaft 9.

[0028] Step 4: Screw the horizontal adjustment screw rods 10 into both sides of the U-shaped support plate 6.3 at the top of the adjustable support 6.

[0029] Step 5: Accurately lay out the coordinates of the cable guide tube using a total station. According to the laying out adjustment requirements, adjust the cable guide tube to the design position using the vertical and horizontal adjustment devices.

[0030] Step 6: Tie the tower reinforcement bars and erect the formwork, then pour concrete.

[0031] As attached Figures 5-7 The diagram shows the positioning device of the beam cable guide 3. The positioning device used is the same as that used in the main tower cable guide 1. The difference is that the bottom end of the vertical steel pipe 5 in the positioning device of the beam cable guide is supported on the bottom formwork 12 of the beam by a concrete pad 11.

[0032] The following steps are included in the positioning and construction of the beam cable guide pipes:

[0033] Step 1: Roughly locate the position of the cable guide pipe. On the bottom formwork of the beam, roughly locate the position of the cable guide pipe 3. The vertical error should be controlled within 30cm and the horizontal error should be controlled within 10cm.

[0034] Step 2: On the bottom formwork 12 of the beam, concrete pads 11 are set at the front and rear ends of the beam cable guide 3, respectively. Vertical steel pipes 5 and bottom plates 7 are set on the concrete pads 11, and adjustable supports 6 are placed inside the vertical steel pipes 5.

[0035] Step 3: Weld channel steel supports 8 to the lower front and lower rear ends of the beam cable guide 3, corresponding to the vertical steel pipe 5, and connect them to the U-shaped support plate 6.3 at the top of the adjustable support 6 via steel shaft 9.

[0036] Step 4: Screw the horizontal adjustment screw rods 10 into both sides of the U-shaped support plate 6.3 at the top of the adjustable support 6.

[0037] Step 5: Accurately lay out the coordinates of the cable guide tube using a total station. According to the laying out adjustment requirements, adjust the cable guide tube to the design position using the vertical and horizontal adjustment devices.

[0038] Step 6: Tie the beam reinforcement and pour concrete.

[0039] The other parts in this embodiment are all existing technologies and will not be described in detail here.

Claims

1. A rapid positioning device for cable-stayed bridge cable guide tubes, characterized in that: in A cable guide positioning mechanism is provided at the lower front end and lower rear end of the cable guide. The positioning mechanism includes a vertical adjustment device and a horizontal adjustment device. The vertical adjustment device includes a vertical steel pipe and an adjustable support at the upper end of the vertical steel pipe. The adjustable support includes a screw, an adjusting nut threaded onto the screw, and a U-shaped support plate fixed at the top of the screw. A base plate is fixed at the bottom end of the vertical steel pipe. The lower end of the screw is inserted into the vertical steel pipe. Channel steel supports are fixed at the lower front end and lower rear end of the cable guide. The lower end of the channel steel support is hinged to the U-shaped support plate of the adjustable support via a steel shaft. The horizontal adjustment device includes two horizontal adjusting screws, which are threaded onto the two limbs of the U-shaped support plate of the adjustable support, and the horizontal adjusting screws are located below the steel shaft. The two horizontal adjusting screws are in contact with the two sides of the channel steel support.

2. The rapid positioning device for cable-stayed bridge ducts according to claim 1, characterized in that: The vertical steel pipe is a φ60 steel pipe; the channel steel support is made of 5# channel steel; and the steel shaft is made of φ20 round steel.

3. The rapid positioning device for cable-stayed bridge cable guides according to claim 1 or 2, characterized in that: The bottom end of the vertical steel pipe in the cable guide positioning mechanism at the main tower cable guide is welded and fixed to the stiffening frame of the main tower.

4. The rapid positioning device for cable-stayed bridge ducts according to claim 1 or 2, characterized in that: The bottom end of the vertical steel pipe in the cable guide positioning mechanism at the beam is supported on the bottom formwork of the beam.

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