JP2006016795A - Heavy load set-off technique - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide set-off technique for ensuring grabbing movement in spite of non-parallel installation of grabbing rails. <P>SOLUTION: In the grabbing technique for grabbing a heavy load such as a bridge girder, the plurality of rails are installed in non-parallel for lateral delivery while avoiding obstacles existing between an assembly yard and a target installation site. A clamp device to be selectively fixed/released to/from the rails and a sliding device for sliding along the rails are provided therein, and a feeding device to be turned in the direction of intersecting the moving direction of the sliding device and consisting of an endless circle belt is arranged on the sliding device in a horizontally turnable manner. The clamp device and the sliding device are connected to each other via a horizontal jack device. The heavy load is laterally mounted and supported on the sliding device on the plurality of rails over the feeding device. The clamp device is fixed to the rails and the horizontal jack device is elongated. After the horizontal jack device is elongated, the clamp device is released and the horizontal jack device is contracted. These actions are taken for synchronously and individually operating the horizontal jack device on the grabbing rails to grab the heavy load to the target installation site while avoiding the obstacles. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a horizontal cutting method in which a heavy object such as a bridge girder is extruded and moved in a direction (width direction) intersecting with the length direction of the heavy object. More specifically, there is an obstacle or the like in front of the extrusion direction. The present invention relates to a side-cutting method that is effective at a site where a rail cannot be installed in parallel in the extrusion direction.

Conventionally, as a method of extruding a bridge girder on a pier, (1) a method of extruding a girder in the direction of the bridge axis and (2) a method of extruding a girder in a direction perpendicular to the bridge axis are employed. The method (1) is a method in which a production yard is installed at a position in front of the extrusion direction, and a bridge girder assembled in the production yard is pushed and moved on a rail laid in the production yard by an extrusion facility, and is laid on a pier. .
The method (2) is a so-called side-cutting method, which is a method of pushing and erection from the horizontal position of the place where the erection is installed to the main erection position.
The construction methods (1) and (2) are selected according to the situation at the construction site.

  By the way, as described above, the pre-construction method (2) pushes and moves from the lateral position to the main installation position with respect to the main installation position. They are laid at right angles (see, for example, Patent Document 1).

JP 2000-234111 A

Therefore, the horizontal construction method implemented today requires crossing the horizontal rails at a right angle with respect to the final installation position and arranging the rails in parallel.
Therefore, depending on the construction site of the bridge, a large-scale civil engineering work is required to install the horizontal rails in parallel, and there are cases where the restriction of the fork site is greatly affected.
For example, if there are obstacles such as steel towers or buildings at the place where the horizontal rails are to be installed in parallel, the horizontal construction method cannot be used if the obstacles cannot be removed. Will do. When the obstacle can be removed, it is necessary to perform civil engineering work such as removing the obstacle and leveling the place where the horizontal rail is to be installed, resulting in a problem that the cost for erection increases.

  The present invention has been made in view of the above-described problems of the prior art, and the object of the present invention is a side-cutting method that can reliably perform a side-to-side movement even when a side-to-side rail is installed non-parallel. Is to provide.

  The technical means taken by the present invention in order to achieve the above-mentioned object is a pre-emption method for pretending to move heavy objects such as bridge girders, avoiding obstacles existing between the assembly yard and the target installation location. A plurality of transverse rails for lateral feed are installed non-parallel, and a clamp device that can switch between fixing / opening to each rail, a slide device that slides on the rail along the rail, and A feeding device composed of an endless track that rotates in a direction crossing the moving direction of the sliding device is arranged on the sliding device so as to be able to turn horizontally, and the clamp device and the sliding device are connected by a horizontal jack device. A heavy load is horizontally mounted across the feeding device on the slide device on the rail, the horizontal clamping device is extended by fixing the clamping device to the rail, and the clamping device is extended after the horizontal jacking device is extended. Open and contract the horizontal jack device, and synchronize this operation with the horizontal jack device of the feeding device that loads heavy objects, or operate it individually, avoiding the obstacles and installing the target installation place (Claim 1).

The non-parallel installation of the horizontal rails means that at least one of the two rails is arranged at a right angle to the installation position, and the other rails are substantially square in shape to avoid obstacles, Alternatively, there are a plurality of transverse rails that slide-guide the feeding device that loads heavy objects, such as an installation configuration that crosses at an angle other than a right angle with respect to the installation position, and a configuration in which two rails are arranged in a substantially plane shape. A state that is not parallel.
In addition, as the horizontal rail, H-section steel is generally used.

The clamping device installed on the horizontal rail only needs to be able to switch between fixing and opening with respect to the rail. When an H-shaped steel is used as the rail, the flange of the H-shaped steel is fixed with a wedge. A wedge-type clamping device is effective.
The slide device placed on the rail slides on the upper surface of the rail (for example, the upper flange upper surface of the H-shaped steel), and the slide surface (sliding surface) of the slide device has a small friction coefficient, for example, An apparatus to which a Teflon (registered trademark) member is attached may be mentioned. As the apparatus, for example, a slide jack (hydraulic jack for moving heavy objects) proposed in Japanese Utility Model Publication No. 1-20323 can be used.

The feeding device mounted on the slide device so as to be able to turn horizontally includes an endless track that freely rotates, and a heavy object is placed on the endless track that rotates. When the feeding device is arranged orthogonal to the slide device, the weight on the feeding device does not change even if the slide device slides. However, when the feeding device intersects with the slide device at an angle other than a right angle, the endless track of the feeding device is rotated by the sliding of the sliding device, and the position of the feeding device that supports the heavy object is along the heavy object. Moving.
In addition, although the endless track band in the feeder is rotatable, the endless track band may be mechanically made to be able to rotate / stop switching (claim 2).

According to the above means, the slide device on which the feeding device for supporting a heavy object is slid and moved on the rail by the fixing of the clamp device and the extension operation of the horizontal jack device. At this time, if the rotation direction of the endless track in the feeding device that loads heavy objects and the moving direction of the slide device (that is, the rail direction) on which the feeding device is mounted are substantially perpendicular, the movement of the sliding device On the other hand, the feeder moves in parallel without changing the posture while maintaining the posture at the start of movement. However, when the rails are installed non-parallel, the rotation direction of the endless track band of the feeding device that loads heavy objects with respect to the slide device that moves the rails crosses at an angle other than a right angle. When the slide device is moved by the extension of the device, a force is applied to the feed device mounted on the slide device, whereby the endless track band of the feed device is rotated, and the feed device is loaded with respect to the heavy object to be loaded. Moves in the direction crossing the transverse feed direction (in the case of a bridge girder, the direction of the bridge axis). That is, the heavy object is laterally fed without moving in the bridge axis direction.
However, when the rotation of the endless track of the feeder installed on the non-parallel rail is stopped, the endless track of the feeder is stopped even if the slide device slides. Move in parallel along the rail while being supported.
Therefore, by extending / shrinking the horizontal jack device while controlling the rotation / stop of the endless track zone in the feeder of each rail that loads heavy objects, the heavy objects can be tilted with respect to the installation position or the bridge shaft It can be moved in the direction, and can be preemptively moved to a predetermined installation position while avoiding obstacles.

According to the present invention, the heavy load horizontal construction method is mounted on the slide device that slides on the rail so as to be horizontally pivotable even if the rail for laterally moving and guiding the heavy load is installed non-parallel. Due to the action of the feeding device, the heavy object can be pretensioned and moved in a state of being securely mounted on the feeding device.
In addition, when the feeding device is configured as described in claim 2, the slide device is moved while controlling the rotation / stop of the endless track in the feeding device, so that the heavy object is crossed in the direction of crossing the preloading direction. It can be turned around the support of the feeding device for one rail or the other rail.
Therefore, even if the horizontal rail is installed non-parallel while avoiding the obstacle, the horizontal movement can be executed accurately. Therefore, the pre-construction method can be applied even at the site where the pre-construction method could not be constructed due to the presence of obstacles. In addition, it eliminates the need for large-scale civil engineering work such as removing obstacles or cutting rocks in order to construct a pre-construction method. A construction method can be provided.

In the following, an example of the preparatory method according to the present invention will be described with reference to the drawings.
FIGS. 1 and 2 show the side-cutting equipment used for the side-cutting method of the present invention. In the figure, A is a horizontal rail, B is a clamping device that can switch between fixing and opening with respect to the horizontal rail A, C Is a slide device that slides on the horizontal rail A, D is a feed device mounted on the slide device C, E is a horizontal jack device that takes the reaction force by the clamp device B and pushes the slide device C, F is a clamping device for wiping.

  The horizontal rail A for horizontal movement of the heavy object W generally uses H-shaped steel, and the connecting portion of the rail is installed so that there is no step. When the horizontal rail A is connected and installed, both end portions are chamfered with a sander or the like.

  The clamping device B attached to the horizontal rail A clamps the front and rear sides of the upper flange 1 of the H-shaped steel of the horizontal rail A with wedge chucks 2 and 2 ', and the wedge chucks 2 and 2' are hydraulic. The opening / closing jacks 3 and 3 'that are operated in the above-described manner are configured so that the fixing / opening can be switched. Further, the clamp device B is provided with connecting portions 4 and 4 ′ for connecting the horizontal jack device E and the like to pins.

The slide device C slides on the upper surface of the upper flange 1 of the horizontal rail A by the extension of the horizontal jack device E. The slide device C includes two slide jacks 6 and 6 ′ built in the body 5. Yes. The two slide jacks 6 and 6 'are formed by placing a synthetic resin sliding member protruding from the lower end of the cylinder under the action of the hydraulic pressure at the bottom of the cylinder having a piston that moves up and down by hydraulic pressure. As a sliding member, a thick disk made of Teflon (registered trademark) resin with a low coefficient of friction and excellent wear resistance (for example, about 5 cm) is used. It protrudes and comes into contact with the upper flange 1 surface of the horizontal rail A.
(For the detailed structure of the slide jacks 6, 6 ', refer to Japanese Utility Model Publication No. 1-20323.)
In addition, the slide device C is equipped with a lateral direction correcting hydraulic jack 7 so that the position in the traveling direction of the heavy load W can be adjusted. This lateral correction hydraulic jack 7 uses the reaction force at the front and rear edges of the H-section steel of the horizontal rail A, so that the installation error of the H-section steel can be absorbed if the jack is in a free state. Can do.

The feeding device D mounted on the slide device C is a device in which an endless track band (crawler) 9 is rotatably wound around the outer periphery of the machine body 8, and a surface for supporting a heavy object W by the endless track band 9. Can be widened, and can be fed endlessly by the rotation of the endless track 9.
In order to reduce the rotational resistance of the endless track 9 that rotates around the outer periphery of the airframe 8 and to enable smooth feeding, a friction coefficient is provided at a position facing the inner surface of the endless track 9 on the upper surface of the airframe 8. A small plastic plate made of synthetic resin with excellent wear resistance (for example, a Teflon (registered trademark) plate is built in, and the plate plate is configured to be pushed up by a hydraulically operated vertical jack placed in the machine body. is there.

In addition, the machine body 8 that winds the endless track band 9 in the feeding device D is supported on the substrate 10 so as to be horizontally rotatable, and is horizontally swung in the left-right direction orthogonal to the rotation direction of the endless track band 9. Correction hydraulic jacks 11 and 11 'are arranged at the front and rear.
The feeding device D configured as described above is arranged so that the rotational direction of the endless track 9 is substantially perpendicular to the sliding direction of the sliding device C, and is horizontal at a substantially central position in plan view of the feeding device D. It is supported so that it can turn. (For the basic configuration of the feeding device D, refer to Japanese Patent No. 3119303).

  The horizontal jack device E is a well-known hydraulic cylinder composed of a cylinder and a rod, and the tip of a rod that is expanded / contracted by hydraulic pressure is connected to a connecting arm of a slide device C arranged near the horizontal jack device E by a pin, The base of the cylinder is connected to a connecting arm of a clamp device A that supports the reaction force of the horizontal jack device E with a pin. In addition, the slide device C on which the feeding device D is mounted supports the number of web cores on both sides in the width direction of the heavy load W to be laterally fed. A squeezing clamp device F is connected to the tip of the slide device C positioned at the head in the feed direction. The clamping device F for wiping is the same as the clamping device A that supports the reaction force of the horizontal jack device E described above.

The above-described pre-equipment equipment (clamp device B, slide device C, feed device D, horizontal jack device E, and squeeze clamp device F) is installed for each horizontal rail A and is connected to a hydraulic pump unit and a hydraulic hose. .
Hereinafter, the process of erection of the bridge girder W ′ using the above-described pre-installation equipment by the pre-construction method will be described with reference to FIGS.
First, the bridge girder erection site shown in FIG. 3 has a rocky mountain (obstacle) X protruding in front of it, and a transverse rail can be installed at a right angle to the construction site so that the conventional lateral construction method is constructed. Can not. For this purpose, this side-by-side construction method places one of the side rails (the right side rail in the drawing) A1 at a substantially right angle to the installation location, and the other side rail A2 avoids the rocks (obstacles) X. And tilt it at an angle. Then, the above-described horizontal equipment is installed on both horizontal rails A1 and A2, and the bridge girder W ′ is mounted on the feeding device D mounted on the slide device C installed on both horizontal rails A1 and A2. The position of the virtual line in FIG. 3). In addition, the location shown with the continuous line in FIG. 3 is a construction location of bridge girder W '. The transverse rails A1 and A2 are laid on the support 13 and installed over the bridge pier 14 at the installation location.

When the bridge girder W ′ mounted and supported in the state indicated by the phantom line in FIG. 3 is laterally fed toward the installation location without moving in the bridge axis direction, the left end of the bridge girder W ′ hits the rocky mountain X. Therefore, it is necessary to move the left end of the bridge girder W ′ to the vicinity of the tip of the rocky mountain X in parallel with the lateral rail A2. Therefore, as shown in FIG. 4 (a), the endless track band 9 of the feeding device D for mounting the bridge girder W 'on the side rail A1 side is set to be rotatable, and the bridge girder W' on the side rail A2 side is set to be rotatable. The endless track 9 of the feeding device D to be mounted is set so as not to rotate, the horizontal jack device E of both rails A1, A2 is extended, and the slide device C is slid. At this time, since the endless track 9 of the feeding device D mounted on the slide device C of the horizontal rail A2 is fixed, the feeding device D on the horizontal rail A2 side does not change the support position of the bridge girder W ′. It moves along the horizontal rail A2. On the other hand, since the endless track 9 of the feeding device D on the side rail A1 side is rotatable, it slides and moves with respect to the feeding device D on the bridge beam W ′ side rail A1 side. Thereby, the bridge girder W ′ is laterally fed to the position indicated by the phantom line in FIG.
In the sliding operation of the sliding device C, first, the horizontal jack device E is brought into a contracted state, and the clamping device B and the clamping device F for wiping are fixed (tightened) to complete preparations for starting. Next, the clamp device B is fixed, the squeeze clamp device F is opened, the horizontal jack device E is extended, and the slide device C is moved. After extension of the horizontal jack device E, the clamping device F for wiping is fixed and the clamping device B is opened. Then, the horizontal jack device E is contracted and the clamping device B is moved. This process is repeated and moved to a predetermined position.

  In the state of FIG. 4A, the endless track band 9 of the feeding device D on the side rail A2 side is fixed, the endless track zone 9 of the feeding device D on the side rail A1 side can be rotated, and the side rail A1. The horizontal jack device E on the side is extended and the slide device C is slid. At this time, the horizontal jack device E on the side of the horizontal rail A2 is not extended. As a result, as shown in FIG. 4B, the bridge girder W ′ is rotated around the support point by the feeding device D on the side rail A2 side, and the right end of the bridge girder W ′ is rotated on the construction position line. To do.

  Next, the endless track 9 of the feeding device D on the side rail A1 side is fixed, the endless track 9 of the feeding device D on the side rail A2 side can be rotated, and the horizontal jack device E on the side rail A2 side is rotated. Is extended to slide the slide device C. At this time, the horizontal jack device E on the side rail A1 side is not extended. As a result, as shown in FIG. 5A, the bridge girder W 'is rotated around the support point by the feeding device D on the side rail A1 side, and the bridge girder W' is in a state parallel to the installation position.

The bridge girder W ′ that has moved to a state parallel to the erection position completes its movement to the erection position if it is translated in that position. This parallel movement fixes the endless track band 9 of the feeding device D on the side rail A1 side, makes the endless track zone 9 of the feeding device D on the side rail A2 side rotatable, and the horizontal jacks of both rails A1 and A2. Elongate device E. Thereby, the slide device C equipped with the feeding device D on the side rail A2 side slides while the endless track 9 rotates and changes the support position with respect to the bridge girder W ′, and as shown in FIG. Translate 'to the erection position and complete the horizontal movement.
Note that the above-described preparatory movement is an example of movement, and is not limited to this work procedure.

FIG. 6 shows another example of the non-parallel installation form of the horizontal rail, one of which is arranged at a substantially right angle with respect to the construction plan and the other of which has two rails to avoid a rocky mountain (obstacle) X ′. The plane is arranged in a generally rectangular shape. In this case, the support on the left side of the bridge girder W is exchanged between the rails arranged in a square shape, and the crossing is performed. It should be noted that during the period from the start to the completion of the pre-sampling, as shown in the previous embodiment, the endless track zone rotation / stop of the feeding device and the extension / stop of the horizontal jack device are appropriately combined.
In addition to the method described above, the heavy object supported on the feeding device is moved in the direction of rotation of the endless track zone by using traction means (eg, hydraulic cylinder, chill hole, lever block, etc.). Also good.

  The seizing method of the present invention is very effective not only for the construction of bridges in mountainous areas, but also for the construction of viaducts such as highways passing between buildings in urban areas.

The side view which shows an example of the equipment used for the horizontal construction method of this invention. FIG. Explanatory drawing which shows the horizontal construction method of a bridge girder. (A), (b) is explanatory drawing which shows the halfway state of the bridge girder's interception. (A), (b) is explanatory drawing which shows the last stage of pre-emption. The figure which shows the other installation form of a horizontal rail.

Explanation of symbols

A, A1, A2 ... Horizontal rail B ... Clamping device
C ... Slide device D ... Feeder
E ... Horizontal jack device W, W '... Heavy load (bridge girder)
9 ... Endless orbit zone

Claims (2)

It is a pre-emption method for pre-moving heavy objects such as bridge girders, and installs multiple horizontal rails for non-parallel feeding for avoiding obstacles between the assembly yard and the target installation location. A clamping device that can switch between fixing and opening with respect to each lateral rail, a slide device that slides on the rail along the rail, and a direction that intersects the moving direction of the slide device on the slide device A feed device composed of a rotating endless track belt is arranged so as to be able to turn horizontally, the clamp device and the slide device are connected by a horizontal jack device, and a heavy object is placed across the feed devices on the slide device on a plurality of rails. The horizontal jack device is extended by fixing the clamp device to the rail, and after the horizontal jack device is extended, the clamp device is opened and the horizontal jack device is contracted. Synchronize horizontal jack device Yokoto rail, or separately by operating, intercept method of heavy for causing intercepted moved to the installation site of interest while the heavy avoiding the obstacle. 2. The method of pre-loading a heavy load according to claim 1, wherein the feeding device is capable of switching rotation / stop of the endless track zone, and moves sideways while switching the rotation / stop of the endless track zone.

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