JPH1018224A - Mounting device for protection pipe of cable stayed bridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mounting device which is capable of mechanically and independently fixing each position in a mounting plane, such as the horizontal level and vertical angle of a protection pipe and its directional property under control with the axis of a bridge and reducing labor and time required for mounting adjustment and enhancing mounting accuracy as well. SOLUTION: A second rack 15 is mounted on a first rack 12 which is fixed with a skeleton by way of an elevation adjusting device 6 so that it may move vertically freely while a third rack 16 is mounted on the second rack 15 at right angles with the axis of the bridge by way of a bride axis normal direction control device 7 and a horizontal angle adjusting device 8 slidingly and turnably in the horizontal direction. A protection pipe bearing base 21 is mounted on the third rack 16 by way of the vertical angle adjusting device 9 turnably in the vertical direction while it is mounted movably in the bridge axis direction by way of abridge direction adjusting device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective tube mounting device for fixing a diagonal member of a cable-stayed bridge, for example, a PC steel rod to a bridge body.

[0002]

2. Description of the Related Art For example, in a cable-stayed bridge, a plurality of diagonal members 3 are stretched between a main girder part 1 and a main tower part 2 of the bridge as shown in FIG. It supports, and the diagonal 3
A steel bar or the like is used.

[0003] The diagonal member 3 made of a PC steel rod or the like is stretched at a predetermined angle and position between the main girder 1 and the main tower 2 on the skeleton side. The part is inserted into a protection tube 4 as shown in FIG. 8 and fixed to the main girder 1 and the main tower 2 as shown in FIGS.

In this case, it is necessary to adjust the mounting angle and the position of the protective tube 4 to predetermined values. As a method for this, conventionally, the position where the protective tube 4 is to be installed is a portion of a portion which has already been constructed. The protective tube 4 is blacked out on the frame of the main girder 1 and the main tower 2, and the protective tube 4 is moved to the position of the black by hand or manually by using an instrument such as a lever block.

[0005] The protective tube 4 on the main girder portion 1 side includes:
The protective tube 4 on the main girder 1 side is collimated by a telescope or the like from the protective tube 4 on the main tower 2 side already fixed, and the relative position with respect to the protective tube 4 on the main tower 2 side calculated in advance. The protective tube 4 on the main girder side 1 is moved and installed manually or manually by using an instrument such as a lever block.

[0006]

With respect to the installation of the protection tube 4, the mounting position, such as the horizontal and vertical angles, the directionality with the bridge shaft, the mounting height, etc., must be fixed at a predetermined angle and position. . However, in the conventional method, since the attachment of the protection tube 4 to the predetermined value is manually adjusted, it is difficult to restrain each degree of freedom of the protection tube, and the angle,
A great deal of labor and time are required to keep the mounting position at a predetermined value, and sufficient mounting accuracy cannot be expected.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned disadvantages of the prior art, and to independently and mechanically adjust the positions in the mounting plane such as the horizontal and vertical angles of the protective tube, the directionality with the bridge shaft, and the mounting height. An object of the present invention is to provide a protection tube mounting device for a cable-stayed bridge which can be adjusted and fixed, can reduce labor and time required for mounting adjustment, and can improve mounting accuracy.

[0008]

According to the present invention, in order to achieve the above object, a second frame is vertically movably mounted on a first frame fixed to a skeleton side via a height adjusting device. A third mount is slidably mounted in the direction perpendicular to the bridge axis and rotatable in the horizontal direction via a bridge axis perpendicular direction adjuster and a horizontal angle adjuster on the mount of the above, and the protective tube support is mounted on the third mount. Is attached so as to be rotatable in the vertical direction via a vertical angle adjustment device and is attached movably in the bridge axis direction via a bridge axis direction adjustment device.

In the height adjusting device, an angle member for height adjustment is vertically attached to the first frame, and an elongated hole is provided in the angle member in a length direction, and the angle member is vertically movably inserted into the elongated hole. The second gantry is fixed to the angle member with bolts, and the bridge axis perpendicular direction adjusting device is a bolt movably inserted into a horizontally elongated hole in a direction perpendicular to the bridge axis provided on the second gantry. The third gantry was fixed to the second gantry, and the third gantry was fitted with a threaded rod to pull it in the direction perpendicular to the bridge axis, and the horizontal angle adjustment device changed the third gantry to the second gantry. On the other hand, the shaft is rotatably mounted in the horizontal direction, and the vertical angle adjusting device is such that the protective tube support is rotatably mounted in the vertical direction with respect to the third gantry, and the bridge shaft direction adjusting device is The gist is that it is a threaded rod that pulls the protective tube support in the bridge axis direction. It is.

[0010] Further, a vertical angle fine adjustment member is interposed between the third gantry and the protection tube support.

According to the first aspect of the present invention, the mounting height of the protective tube can be adjusted by the height adjusting device, and the protective tube is horizontally moved in the direction perpendicular to the bridge axis by the bridge axis perpendicular direction adjusting device.
In addition, the protection tube can be positioned in the bridge axis direction by rotating the protection tube in the horizontal direction by the horizontal angle adjusting device. Then, the installation angle in the vertical direction is adjusted by rotating the protection tube in the vertical plane by the vertical angle adjustment device, and the protection tube is installed in a predetermined position by moving the protection tube in the bridge axis direction by the bridge axis direction adjustment device.

According to the present invention as set forth in claims 2 to 6, in addition to the above-mentioned functions, a height adjusting device, a bridge axis perpendicular direction adjusting device, a horizontal angle adjusting device, a vertical angle adjusting device, a bridge axis direction adjusting. Since each device is composed of mechanical members such as angle members, bolts, and screw rods, it has a simple structure, can be easily assembled and removed on site, and can be easily handled by any worker.

According to the seventh aspect of the present invention, in addition to the above-described operation, by rotating the protective tube support by the vertical angle fine adjustment member, the accuracy is particularly improved in the cable stayed bridge in which the diagonal member is stretched. The required vertical angle can be precisely adjusted.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a front view showing an embodiment of a protection tube mounting device for a cable-stayed bridge according to the present invention, FIG. 2 is an upper side view thereof, and FIG. The protection pipe 4 which is connected to the end of a steel beam, for example, a PC steel rod, which is a diagonal member 3 for connecting the main girder part 1 and the main tower part 2 of the cable stayed bridge as shown, is connected to the main girder part 1 and the main tower part 2. At a predetermined angle at a predetermined position.

As shown in FIG. 8, the protective tube 4 has a thin tube 4a at one end into which a diagonal member 3 such as a PC steel bar is inserted one by one, and a flange 4b at the other end. A hole 4 in which a bridge axis direction adjusting device described later is attached to the flange 4b.
A plurality of “c” s are provided at appropriate intervals.

The protection tube mounting device 5 of the present invention includes a height adjustment device 6, a bridge axis perpendicular direction adjustment device 7, a horizontal angle adjustment device 8,
It is provided with a vertical angle adjusting device 9, a bridge axis direction adjusting device 10, and a vertical angle fine adjusting member 11, and 12 in the figure is a portion that has already been constructed, for example, a frame on the main girder portion 1 side. 1 shows a first frame fixed to an existing block 1a. The first frame 12 is fixed to an anchor previously set at an end of the existing block 1a with bolts.
It has two angle members 12a projecting in parallel and horizontally at an interval from the end a.

The height adjusting device 6 is attached to the tip of the first base 12.
Is provided. The height adjusting device 6 is for vertically fixing the angle member 6a to the two angle members 12a constituting the first gantry. The angle member 6a is provided with an elongated hole 13 in the length direction. The second pedestal 15 is combined with the angle member 6a so as to be able to move up and down with the bolts 14 inserted into the angle member 13 so as to move up and down.

The second base 15 is also made of an angle material, and is combined with the angle material 6a in a direction that is horizontal, that is, in a direction orthogonal to the angle material 6a.
a, and the elongated hole 15a is formed in the elongated hole 13 of the angle material 6a.
At this position, the second base 15 is fixed to the angle member 6a by the bolt 14.

The bridge axis perpendicular direction adjusting device 7 is provided with an elongated hole 15b in the horizontal direction perpendicular to the bridge axis in the horizontal plane of the second gantry 15, and the horizontal plate 16a forming a part of the third gantry 16 is The horizontal plate 16a is slidably mounted on the second gantry 15 in the horizontal direction orthogonal to the bridge axis, and the horizontal plate 16a is fixed to the second gantry 15 with bolts 17 inserted into the elongated holes 15b.

Then, the tip of the screw rod 19 to be combined with the horizontal plate 16 in the horizontal direction at right angles to the bridge axis is connected to the horizontal plate 16a.
, And screwed halfway into a nut 18 attached to the end of the second gantry 15.

The horizontal angle adjusting device 8 has a disk-shaped plate 16b mounted on a horizontal plate 16a as a member constituting another part of the third gantry 16 so as to be rotatable in the horizontal direction by bolts 20.

The vertical angle adjusting device 9 raises a pair of substantially semicircular vertical plates 16c facing each other from the disk-shaped plate 16b in the bridge axis direction, and projects downward from the lower portion of the protection tube support 21 to form a substantially semicircular shape. The rotating plate 21a is rotatably superimposed on the vertical plate 16c.

The bridge axis direction adjusting device 10 is configured such that a screw rod 22 having one end fixed to an end of a protective tube support 21 with a nut is formed in the hole 4 of the protective tube 4.
c and the other end was projected.

The vertical angle fine adjustment member 11 is constituted by a turnbuckle disposed between the lower part of the protection tube support 21 and the disk-shaped plate 16b of the third gantry 16.

Next, a method of fixing the protection tube 4 to the existing block 1a of the main girder 1 as shown in FIG. 6, for example, using the mounting device 5 configured as described above will be described. First, a projection line of the protection tube 4 to be mounted on the bridge surface of the existing block 1a is projected on the bridge surface.

The first base 12 is fixed to the anchor by bolts at the end of the existing block 1a in advance, and the mounting device 5 is protruded from the end of the existing block 1a in the direction of the assembly block to protect it. The protection tube 4 is placed on the pipe support 21.

A transit is installed in the blackout portion on the existing block 1a, and the projection line is collimated to fix the horizontal angle of the transit. Further, the outer diameter of the front and rear portions of the protection tube 4 is collimated. .

In this state, the direction perpendicular to the bridge axis of the mounting device 5 is adjusted so that the outer diameter of the front part and the rear part of the protection tube 4 coincide with the intersection of the cross line of the transit. The adjustment in the direction perpendicular to the bridge axis is performed by turning the screw rod 19 of the adjusting device 7 in the direction perpendicular to the bridge axis, and the horizontal plate 16a.
Is performed by moving the second mount 15 on the horizontal plane at right angles to the bridge axis along the elongated holes 15b, thereby adjusting the position of the protective tube 4 at right angles to the bridge axis.

When the position of the protection tube 4 in the direction perpendicular to the bridge axis is largely determined, the horizontal angle is adjusted next. This is a disk-shaped plate 16b
Is rotated horizontally on the horizontal plate 16a, and the protective tube 4 is rotated on a horizontal plane.

The adjustment of the position perpendicular to the bridge axis and the horizontal position is continued until the outer diameters of the front and rear portions of the protection tube 4 coincide with the crosshairs on the transit.
Tighten the bolt 17, fix the horizontal plate 16a to the second base 15,
Also, tighten the nut screwed on the bolt 20 to remove the disc
16b is fixed to the horizontal plate 16a.

After the position of the protection pipe 4 in the direction perpendicular to the bridge axis and the horizontal angle are determined as described above, the position in the direction of the bridge axis and the vertical angle are then determined.
Adjust the mounting height. To adjust the vertical angle, collimate the front and rear of the protection tube 4 at the level installed on the bridge surface, judge whether each height matches the design value calculated in advance, and If the difference between the height of the rear part and the height of the rear part is different from the design value, the rotating plate 21a as the vertical angle adjusting device 9 is connected to the vertical plate 16c.
The rotating plate 21a is fixed to the vertical plate 16c with bolts if the design value is met.

Next, the mounting height is adjusted. In this case, the second base 15 is moved vertically along the elongated hole 13 with respect to the angle member 6a so that the heights of the front part and the rear part of the protection tube 4 respectively match the design values. Bolt if it matches the design value
Tighten 14 to fix the second gantry 15 to the angle member 6a.

Finally, the position in the bridge axis direction is adjusted. This is done by measuring the distance from the black position in the direction perpendicular to the bridge axis, which has been previously blacked out on the existing block 1a, to the front of the protection tube 4 on a scale, and determining whether or not it is installed at a predetermined position. If it is not at the predetermined position, the screw rod 22 is pulled or pushed to adjust the installation position of the front part of the protection tube 4.

At this time, the mounting height is slightly changed due to the movement of the protection tube 4, so that the mounting height is adjusted again.

As described above, the protective tube 4 was set at a predetermined position by the height adjusting device 6, the bridge axis perpendicular direction adjusting device 7, the horizontal angle adjusting device 8, the vertical angle adjusting device 9, and the bridge axis direction adjusting device 10. If this is the case, the position in the direction perpendicular to the insertion axis and the horizontal angle are checked with a transit, and finally the vertical angle is finely adjusted by a vertical angle fine adjustment member 11 such as a turnbuckle if necessary.

When the adjustment is completed, the protection tube 4 is welded to a support material such as a reinforcing bar and fixed to the reinforcing bar of the assembly block 1b.

In the above-described embodiment, the protection tube 4 is fixed to the main girder 1 side. However, as shown in FIG. Is the same, but in this case, the mounting device 5 is fixed to the steel frame of the assembly block 2b rising from the existing block 2a of the main tower 2.

After the protection tube 4 is fixed, the mounting device 5 is removed and used for installing the next protection tube 4.

The bridge axis perpendicular direction adjusting device 7 and the bridge axis direction adjusting device 10 are provided with a scale, and the horizontal angle adjusting device 8 and the vertical angle adjusting device 9 are provided with a disk-shaped angle scale. Easy to see.

Furthermore, it is also possible to mount the bubble level in two orthogonal directions of the gantry.

[0041]

As described above, according to the present invention, the protection tube mounting device for a cable-stayed bridge is provided in the same direction as the horizontal and vertical angles of the protection tube, the bridge axis, or in the mounting plane such as the mounting height. Can be independently and sequentially mechanically adjusted and fixed, labor and time required for mounting adjustment can be reduced, and mounting accuracy can be improved.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a protection tube mounting device for a cable stayed bridge according to the present invention.

FIG. 2 is a side view showing an embodiment of a protection tube mounting device for a cable-stayed bridge according to the present invention.

FIG. 3 is a plan view showing an embodiment of a protection tube mounting device for a cable-stayed bridge according to the present invention.

FIG. 4 is a front view of a main part showing an embodiment of a protection tube mounting device for a cable-stayed bridge according to the present invention.

FIG. 5 is a front view of a cable stayed bridge in which the protective tube mounting device of the present invention is used.

FIG. 6 is a side view showing a state where the protective tube of the present invention is fixed to the main girder part side.

FIG. 7 is a side view showing a state in which the protection tube of the present invention is fixed to the main tower.

FIG. 8 is a side view of the protection tube.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Main girder part 1a ... Existing block 1b ... Assembly block 2 ... Main tower part 2a ... Existing block 2b ... Assembly block 3 ... Diagonal material 4 ... Protective tube 4a ... Narrow tube 4b ... Flange 4c ... Hole 5 ... Mounting device 6 ... Height Adjustment device 6a ... Angle material 7 ... Adjustment device for bridge axis perpendicular direction 8 ... Adjustment device for horizontal angle 9 ... Vertical angle adjustment device 10 ... Adjustment device for bridge axis direction 11 ... Fine adjustment member for vertical angle 12 ... First mount 12a ... Angle Material 13 ... Elongated hole 14 ... Bolt 15 ... Second mount 15a ... Elongated hole 15b ... Elongated hole 16 ... Third mount 16a ... Horizontal plate 16b ... Disc-shaped plate 16c ... Vertical plate 17 ... Bolt 18 ... Nut 19 ... Screw Rod 20… Bolt 21… Protective tube support 21a… Rotating plate

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor, Sanyo Yukimitsu 6-3-2, Toyo, Koto-ku, Tokyo Kashima Construction Co., Ltd.Kanto Branch (72) Inventor Eitaro Imai 3-27, Tadara, Nerima-ku, Tokyo No. 11 Inside Minakae Construction Industry Co., Ltd.

Claims (7)

[Claims] 1. A second gantry is vertically movably mounted on a first gantry fixed to a skeleton side via a height adjusting device, and a bridge axis right angle direction adjusting device and a horizontal angle adjustment are mounted on the second gantry. The third mount is slidable in the direction perpendicular to the bridge axis and rotatable in the horizontal direction via the device, and the protective tube support is rotatable in the vertical direction on the third mount via the vertical angle adjustment device. A protection tube mounting device for a cable-stayed bridge, wherein the protection tube mounting device is mounted on a bridge and is movably mounted in a bridge axis direction via a bridge axis direction adjusting device. 2. A height adjusting device, wherein an angle member for height adjustment is vertically attached to a first pedestal, an elongated hole is provided in the angle member in a length direction, and the angle member is vertically movably inserted into the elongated hole. The protection tube mounting device for a cable-stayed bridge according to claim 1, wherein the second base is fixed to the angle member with bolts. 3. The bridge axis perpendicular direction adjusting device fixes the third frame to the second frame with bolts movably inserted into a horizontally elongated hole in a direction perpendicular to the bridge axis provided on the second frame. The mounting device for a protection tube of a cable-stayed bridge according to any one of claims 1 to 2, wherein a screw rod for pulling the screw in a direction perpendicular to the bridge axis is mounted on the third mount. 4. The protection tube for a cable-stayed bridge according to claim 1, wherein the horizontal angle adjusting device axially mounts the third gantry to the second gantry so as to be rotatable in a horizontal direction. Mounting device. 5. The protection pipe for a cable-stayed bridge according to claim 1, wherein the vertical angle adjustment device pivotally mounts the protection pipe support on the third mount so as to be vertically rotatable. Mounting device. 6. The installation device for a protection tube of a cable-stayed bridge according to claim 1, wherein the bridge axis direction adjusting device is a screw rod for pulling the protection tube support in the bridge axis direction. 7. The installation device for a protection tube of a cable stayed bridge according to claim 1, wherein a vertical angle fine adjustment member is interposed between the third mount and the protection tube support.