JP2000355908A - Installing method for weighty structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the installing method for a weighty structure in which the weighty structure such as a pedestrian bridge, a bridge or the like is mounted accurately and an installation time can be shortened. SOLUTION: The installing method for the weighty structure has the first process in which utilities 14-18 are installed at fixed positions, the second process in which main body sections 11-13 are placed on heavy-article transport cars and transported up to positions in front of installation places, the third process in which the main body sections 11-13 conveyed up to the positions in front of the installation places are charged up to fixed installation places under the state in which the main body sections are placed on the heavy-article transport cars, and the fourth process in which the main body sections 11-13 and the utilities 14-18 are connected. When the moving operation of the heavy-article transport cars is changed in the third process, the steering handling angles of the heavy-article transport cars are changed into target angles without returning to initial angles from current angles once.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of installing a heavy structure, for example, a method of installing a pedestrian bridge or a bridge at an installation position such as an intersection.

[0002]

2. Description of the Related Art Conventionally, when a heavy load transporting vehicle, such as a dolly, having a large number of wheels and capable of mounting and transporting a heavy structure, has not been used, the material is transported to the site and the site is transported. In many cases, construction was performed. However, recently, a heavy structure manufactured in a manufacturing yard is divided into large blocks, and the heavy structures are transported to the site using a heavy load transport vehicle.
Prefabricated methods are increasingly used. With this method, the installation time on site is greatly reduced,
In addition, since the heavy structures are manufactured in the manufacturing yard, a certain level of quality of the manufactured products is secured. In recent years, pedestrian bridges at intersections and bridges in the city center are designed and manufactured with emphasis on cityscapes, and many deformed bridges have been constructed. It has come to be. When a heavy structure transported to the site is installed at the installation position, if the direction of movement of the dolly shifts due to the inclination of the road and fine adjustment of the direction of movement is required, the steering program operation mode of the dolly is changed to the site. The operation was switched according to the situation.
The steering program operation mode is a type of moving operation of a dolly having a large number of wheels, and by switching the operation mode, the direction of each wheel can be independently adjusted according to the rotation center position and the rotation angle. , Which can be changed to an optimal orientation.

As shown in FIGS. 4 and 5, the dolly 50 is
It has a number of wheels 51. The wheels 51 are rotatably mounted on the axle 61 as a set of four wheels. Axle 6
1 is connected to one end of a turning arm 52, and the other end of the turning arm 52 is connected to one end of a fixed arm 53 by a connecting shaft 5.
4 so as to be rotatable. Fixed arm 53
Is fixed to the vertical rotation shaft 55, and the other end of the vertical rotation shaft 55
Is rotatably attached to the mounting table 56. A hydraulic jack 57 is attached to the fixed arm 53 and the rotating arm 52. The hydraulic jack 57 can change the height of the mounting table 56 by extending and retracting the rod 58, and thereby can lift and lower the heavy structure. The hydraulic jack 57 also plays a role of a suspension when moving. A steering pinion 59 is attached to the vertical rotation shaft 55, and the steering pinion 59 meshes with a rack (not shown) provided in a cylinder tube 60 provided below the mounting table 56. The direction of the dolly 50 can be changed for each wheel group 62 in which the wheels 51 are formed as a set of four wheels by a rack that moves in the cylinder tube 60 by hydraulic pressure. In addition,
The axle 61 is provided with a drive unit and a brake system by a hydraulic motor (not shown), and enables the dolly 50 to move and stop.

FIGS. 6A to 6C show a dolly 65 in which the direction of wheels is changed for each operation mode. As shown in (A), when the front wheel group 63 of the dolly 65 is turned to the right and the rear wheel group 64 is turned to the left, the dolly 65 moves forward while turning slightly and turns to the right. Also, as shown in (B),
When all the wheel groups 67 of the dolly 65 are directed in the same direction, the dolly 65 moves in accordance with the direction of the wheel group 67 without changing the direction of the vehicle body. And, as shown in (C),
When the directions of all the wheel groups 70 of the dolly 65 are oriented in a direction orthogonal to the direction of the center position 69, the dolly 65 can rotate around the center position 69. The dolly 65 has several other operation modes, and can change its direction while moving around an arbitrary position. As shown in FIG. 7, when carrying a large-sized heavy structure, a plurality of dolly 50 are used. In this case, when performing the rotational movement while the heavy structure is placed, the center of rotation is set to, for example, the origin O, and the coordinates (x, y) of the center position 71 of each dolly 50 are input and set in advance. One of the selected modes. Then, each dolly 50 returns the direction of the wheel group to the traveling direction (the direction of arrow A in FIG. 5) once, and sets the direction of each wheel group for each dolly 50 based on the traveling direction of the dolly 50. The moving direction of the dolly 50 is changed by changing the angle by a predetermined angle. When the dolly 50 is driven, the heavy structure can be rotated and moved around the point O in the direction of the arrow B while the heavy structure is mounted. As described above, all the operation modes are set based on the traveling direction of the dolly (or the direction orthogonal thereto), and the modes can be switched and moved by a simple operation.

[0005]

However, in the conventional method of mounting a heavy-weight structure, since the reference of the operation mode is all the traveling direction or the direction perpendicular to the traveling direction, fine adjustment of the moving direction is necessary. However, when the mode is changed, it is necessary to return all the wheels to the traveling direction once and then perform the operation of the selected mode. When returning to the reference direction and when moving to the selection mode, a large error may occur between the planned position and the actual movement position due to friction between the road surface and the tire or inclination of the road surface, and as required in recent years. Could not cope with strict accuracy. For this reason, the operator has to reciprocate and make fine adjustments many times with the heavy structure placed on the dolly in order to perform positioning, and the time required for installation tends to be longer. The present invention has been made in view of such circumstances, and an object of the present invention is to provide a method of installing a heavy structure capable of accurately installing a heavy structure such as a pedestrian bridge or a bridge and shortening the installation time.

[0006]

According to the present invention, there is provided a method for installing a heavy structure, comprising the steps of:
A heavy structure which is divided into a plurality of segments including a main body portion and at least two auxiliary equipments disposed opposite to each other with the main body portion at the center, manufactured at a factory, and transported to a predetermined place on the site for installation. In the installation method, each of the incidental facilities has a connecting portion to be coupled to a joint end of the main body, and in the division of the segment, the opposing incidental facilities installed in a predetermined place are installed. A first step of installing the auxiliary equipment at a predetermined location, and a step of mounting the main body on a heavy load transporting vehicle before the installation location; A second step of transporting the main body to a position before the installation location, and a third step of loading the main body portion transported to a position before the installation location to a predetermined installation location while being mounted on the heavy load transporting vehicle; And the above-mentioned auxiliary equipment A fourth step of performing the operation, and when the moving operation of the heavy load transporting vehicle is changed in the third step, the steering angle of the heavy load transporting vehicle is set to the target angle without returning to the initial angle once from the current angle. Change to an angle. Here, the charging direction refers to the direction in which the joining end of the main body portion enters the connecting portion of the auxiliary equipment when the main body portion is brought into contact with the auxiliary equipment, and may be upward, downward, or lateral. is there. When the main body is transferred and joined to the auxiliary equipment, if the clearance at the joint is small, it is necessary to prevent positional displacement due to a change in the steering angle and improve the alignment accuracy. Therefore, when the heavy transport vehicle approaches the joint and it is necessary to correct the approach angle, if the current angle of the wheels is shifted from the initial angle of the transport vehicle (the front direction of the vehicle), By inputting the approach angle of the vehicle as 0 degree and inputting the target angle as an angle compared with the current angle, the angle of the heavy load transporting vehicle can be changed only once at a small angle to reduce the error.

[0007] Here, the loading direction of the main body is set downward, the connecting portion is a mounting portion on which a joint end of the main body is mounted, and the contact with the main body in the third step is performed by It is also possible to carry out by lowering the joint end of the main body portion on the mounting portion and mounting it. The loading direction of the main body is set to the upper side, and the contact and connection with the main body in the third and fourth steps are performed by raising the joining end of the main body to the connecting portion. It can also be performed by fixing using a plate. Here, the contact direction and the connection with the main body in the third and fourth steps are performed by inserting the joint end of the main body into the connecting portion, with the charging direction of the main body being the side. It is also possible to carry out by making contact with each other and fixing them using a blind board. In this way, the mounting direction of the main body can be changed according to the situation of obstacles and the like at the installation location. Further, the heavy structure may be a footbridge or a bridge. With such a configuration, the heavy load transport vehicle can be inserted into the lower portion of the main body and can be moved up and down, so that the work can be performed in a short time.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. As shown in FIG. 1, a pedestrian bridge 10, which is an example of a large-sized heavy structure used in the method of installing a heavy structure according to one embodiment of the present invention, has three divided main bodies 11 to 13, 5. It has two auxiliary facilities 14-18. The details will be described below. The pedestrian bridge 10 is provided at a five-way intersection and is an intersection 1 connected to the road 21 and the road 22.
Ancillary facilities 14 are provided on the sidewalk at the corner 9.
The ancillary equipment 14 includes a staircase 23, a landing 24, and a support 2
The landing portion 24 includes a mounting portion 27 at the joint portion with the main body portion 11, which is an example of a connecting portion on which the joint end portion 26 of the main body portion 11 is mounted.

The ancillary equipment 15 is arranged at a position facing the ancillary equipment 14 with the road 22 interposed therebetween with the main body 11 as a center. Joint end portions 32 of the main body 11 facing each other
The mounting part 28 of the auxiliary equipment 15 to which the
The spacing between the mounting portions 27 is a wedge shape that gradually narrows in the direction in which the main body 11 is inserted (the direction in which the road 22 is viewed from the intersection 19, and downwards). It serves as a guide when entering the portions 27 and 28 from the side. In addition, the auxiliary equipment 16 is also similar to the main body 11.
Are disposed at positions opposing the incidental facilities 15 with the road 29 interposed therebetween, with the incidental facilities 15 and 16 facing each other.
The spacing between the mounting portions 28 and 34 has a wedge shape that gradually narrows in the direction in which the main body portion 11 is inserted (in the direction in which the road 29 is viewed from the intersection 19 and below). The main body 11
Since the vehicle enters while adjusting the charging direction, the charging direction does not become constant. However, the shape of the incidental facilities 14 to 16 is the reference angle of entry if the main body 11 enters from the intersection 19 side. It has a shape that can cope with any deviation from it. Ancillary facilities 17 and 18 are provided on both sides of the road 31 with the main body 13 at the center, respectively, and have the same configuration as the ancillary facilities 14 and 15. In addition, the main bodies 11, 1 facing each other with the roads 21, 30 interposed therebetween.
Each of the end portions 35, 36 has a wedge shape that gradually narrows in the loading direction of the main body portion 12 similarly to the mounting portions 27, 28, guides the main body portion 12, and then hooks. It can be joined. The dolly, which is an example of the heavy-duty transportation vehicle used in the method of installing a heavy-weight structure according to the present invention, has the same structure as the dolly 50 described in the conventional example, and a description thereof will be omitted.

Next, a method for installing a heavy structure according to the present invention will be described. First, the pedestrian bridge 10 is
13 and ancillary facilities 14 to 18 are divided into a plurality of segments and manufactured in a factory. When dividing into each segment, the mounting portions 27, 28, 34, 37, 38 of the opposing auxiliary facilities 14 to 18 installed in a predetermined place.
The corresponding intervals are designed in advance so as to reduce the width in the direction in which the main body portions 11 and 13 are inserted. Next, the auxiliary facilities 14 to 18 are transported and installed to an intersection 19 which is a predetermined place on the site (first step). Then, the main bodies 11 to 13 are placed on a plurality of dollies and transported to a position before the installation location in the intersection 19 (second step). Subsequently, the main bodies 11 to 1 conveyed to a position in front of the installation location
3 is transported to a predetermined installation place while being placed on a dolly. The main body 11 is transported, for example, along a road 21. At the time of transport, a positioning tape is stuck to the road 21 and a dolly is attached to the dolly. Thereby, the transport direction can be confirmed. Then, the vehicle curves in the direction of the road 22 in the intersection 19 and approaches the incidental facilities 14 and 15, and switches the operation mode in the middle of the curve. At this time, Dori's wheels are not facing the front of Dori because he is in the middle of a curve. Conventionally, when the operation mode is changed from this state, the wheel of the dolly once faces the front of the dolly, and then faces the target direction.

However, in the method of installing a heavy-weight structure according to the present invention, when the movement of the main bodies 11 to 13 is changed, the steering angle of the dolly on which the main bodies 11 to 13 are mounted is temporarily changed from the current angle. Change to the target angle without returning to the initial angle. That is, before the mode is changed, the setting is performed based on the current wheel direction, so that it is possible to change from the current wheel direction to the target direction in one movement. For example, if the current position (current angle) is 30 degrees to the right from the front of the dolly, and the target angle is 35 degrees to the right from the front of the dolly, if it is conventional, 30+
Although a rotation angle of 35 = 75 degrees was required, in the present invention, since it is sufficient to rotate only 35-30 = 5 degrees, the error is naturally reduced. As described above, this method is particularly effective when a small angle is corrected, such as when fine adjustment is performed at the time of installation, or when the road surface is inclined.

After the fine adjustment (positioning) of the mounting position of the main body 11 in the horizontal direction is completed, the main body 11 is lowered to connect the joint ends 26, 32, 33 to the corresponding auxiliary equipment 14.
16 are mounted (contacted) on the corresponding mounting portions 27, 28, 34 (third step). Then, the main body 11
And the auxiliary equipment 14 to 16 are connected (fourth step). Then, the main unit 13 is attached to the auxiliary equipments 17 and 18 in the same procedure.
The main body 12 is joined to the ends 35 and 36 of the main bodies 11 and 13. Main unit 1
2 is a structure in which the weight is dispersed and supported on the incidental facilities 14 to 18 via the main body parts 11 and 13, so that it can be easily constructed. Although the embodiment according to the present invention has been described above, the present invention is not limited to the embodiment. For example, in the embodiment, the case where the heavy structure is a pedestrian bridge has been described. The present invention is also applicable to a case where a large factory facility such as a blast furnace is transferred and installed. Also, the main body 11
Sensors are provided at the joining ends 26, 32, 33 of
The mounting portions 2 corresponding to the joint ends 26, 32, and 33, respectively.
It is also possible to measure the distance between 7, 28, and 34 in real time, and to operate the heavy load transporting vehicle while correcting the operation mode as needed based on this data. Further, in the present embodiment, the main body portion insertion direction is downward and sideward, and the shape of the connecting portion is gradually reduced downward and sideward. It is also possible to fix it only on the side or only on the side and use the eye panel.
As shown in FIG. 2, when the main body loading direction is only upward, the joining end 37 b of the main body 37 a is
, And can be fastened and fixed by the bolt 40 using the eye plate 39. If there is an obstacle above the pedestrian bridge, this can be avoided, and when the heavy goods transport vehicle 41 moves, its height can be reduced, so that it can move stably. FIG.
As shown in (A) and (B), when the main body portion is inserted only in the side direction, the joining end 41b of the main body portion 41a is inserted into the connecting portion 42 from the side, and It is also possible to use the bolt 43 to fasten and fix it. By adjusting the height of the main body portion 41a in advance to the height at the time of installation, the movement is completed only by the lateral charging, so that the movement time can be shortened. In addition, the eye plates 39 and 43 are
Instead of using the bolts 40 and 44, the bolts 40 and 44 can be fixed by welding, and can be attached to the side surface and / or the lower surface other than the upper surface of the main body portions 37a and 41a. Further, it is also possible to form the joint end and the connecting portion in a step shape, and to perform positioning when the joint end and the connecting portion come into contact with each other by using the step.

[0013]

EXAMPLE A condition that the clearance between the main bodies 11 to 13 to be installed and the ancillary facilities 14 to 18 is 35 mm, and the required installation accuracy is ± 10 mm using the method for installing a heavy structure described in the above embodiment. Was installed. As a result, the required accuracy of the installation was cleared and the construction was completed smoothly.

[0014]

According to the method for installing a heavy-weight structure according to the first aspect, the steering angle is changed from the current angle to the target angle without returning to the initial angle, so that the heavy-weight structure can be accurately installed. Is possible. In particular, in the method for installing a heavy structure according to claim 2, since the heavy structure is a pedestrian bridge or a bridge, a heavy load transport vehicle can be inserted into a lower portion of the main body to ascend and descend, thereby shortening the work. Can be done on time.

[Brief description of the drawings]

FIG. 1 is a plan view of a pedestrian bridge installed by a method of installing a heavy structure according to an embodiment of the present invention.

FIG. 2 is an explanatory view of a joint portion of a pedestrian bridge installed by a method of installing a heavy structure according to a modification.

FIGS. 3A and 3B are explanatory views of a joint portion of a pedestrian bridge installed by a method of installing a heavy structure according to another modification.

FIG. 4 is an explanatory view of a dolly used in a method of installing a heavy-weight structure according to a conventional example.

FIG. 5 is a partially enlarged view of the dolly.

FIGS. 6A to 6C are explanatory diagrams of operation modes of the dolly.

FIG. 7 is an explanatory diagram when a plurality of the dollies are used simultaneously.

[Explanation of symbols]

10: Pedestrian bridge (heavy structure), 11 to 13: Main body, 1
4 to 18: incidental facilities, 19: intersection, 21, 22: road, 23: stairs, 24: landing, 25: strut, 26:
Joint end, 27: mounting part, 28: mounting part, 29-31:
Road, 32, 33: junction end, 34: mounting part, 35, 3
6: end portion, 37: mounting portion, 37a: main body portion, 37b: joining end portion, 38: mounting portion, 38a: connecting portion, 39: eye plate,
40: bolt, 41: heavy load transportation vehicle, 41a: main body, 41b: joint end, 42: connecting part, 43: eye plate, 4
4: bolt

Claims (2)

[Claims] 1. A large-sized heavy structure is manufactured at a factory by dividing it into a plurality of segments including a main body portion and at least two auxiliary facilities arranged opposite to each other with the main body portion at the center, and manufactured at a predetermined location on the site. In the method of installing a heavy structure for carrying and installing them, each of the incidental facilities has a connecting portion to be connected to a joining end of the main body, and in the division of the segment, a predetermined location is provided. The distance between the connecting portions of the ancillary facilities facing each other in a state where the ancillary facilities are installed is set to be narrower in the charging direction of the main body, a first step of installing the ancillary facilities at a predetermined location, and A second step of mounting the article on a load transport vehicle and transferring it to a position immediately before the installation location; and A third step of charging until A fourth step of connecting the main body and the auxiliary equipment is provided, and when changing the movement operation of the heavy load transport vehicle in the third step, a steering angle of the heavy load transport vehicle is changed by: A method for installing a heavy-weight structure, comprising changing a current angle to a target angle without returning to an initial angle. 2. The method according to claim 1, wherein the heavy structure is a footbridge or a bridge.