JPH0689528B2 - Girder construction method and its equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a girder construction method and an apparatus therefor in a construction work such as an iron bridge, an expressway or an overpass, and the purpose thereof is adjacent to each other. The girder erection work in a narrow space between obstacles can be performed safely and reliably.

[Conventional technology]

For example, in the case of performing the replacement work of the elevated rail on the existing railway, the applicant previously described in Japanese Patent Publication No. 57-32162
An invention of a girder erection device has been provided.

In the above invention, the front tower is integrally attached to one end of the hand laying machine installed on the piers at intervals, and the front tower and the rear tower that is erected at a distance behind the tower are crossed. The girder is erected vertically using a hydraulic system, and the girder is equipped with a traveling machine that rolls along with it, and the traveling equipment is hung below the girder with hanging equipment that suspends the bridge girder located between the pillars. It will be.

With this, the bridge girder between the left and right pedestals can be sequentially drawn out forward by the traveling machine and the suspension along the girder that is laid across the front tower and the rear tower. Therefore, the process of drawing out the bridge girder can be performed smoothly, and the connecting structure for fixing the bridge girder to the hand extender is not required, which is particularly effective for drawing out the PC girder and has the effect that the work can be performed easily. .

[Problems to be Solved by the Invention]

Since the girder erection device has a structure in which the girder moves inside the pedestals on the left and right sides forming the gate type of the rear tower, it is suitable for use when the installation place is relatively wide. In the case of rail replacement work on
In order to lay a rail in a narrow space between adjacent rails on an up line and a down line, the girder erection device is dangerous because the lateral width between the left and right pedestals is too overhang and it may contact a train running. May not be used for construction at location.

[Means for solving the problem]

Therefore, in order to solve the above-mentioned problems of the prior art and to achieve the object of the invention, there is provided a girder erection method and an apparatus thereof that can be installed and constructed even in a narrow place where only the girder can be moved and installed. is there.

A first aspect of the present invention is, in a girder erection method, passing a hanging girder that can be lifted and lowered between a gate-structured front tower and a rear tower that is set to a width that does not project outside the lateral width of the girder. A girder was installed on the front tower, and a front and rear towers were installed, and the front and rear towers were placed on the pier, and the girder, which was placed on the trolley and moved forward just under the suspension girder, approached the rear tower. Sometimes after stopping once, the rear tower was lifted slightly above the girder height, and then the girder was moved through the space formed on the leg ends of the rear tower and the traveling girders placed on the bridge piers, and the girder moved up the rear tower. After passing, lower the rear tower to the original position and ground it, then suspend and support the girder with a long threaded rod-shaped suspender and separate it from the traveling girder, then move the traveling girder. After moving forward through the hand lathe By 扛下 with hanging digit girders placed on piers, it is made by removing the load block.

A second aspect of the present invention is, in a girder erection device, a gate-structured front tower is integrally connected to a base end of a hand laying machine erected on bridge piers at predetermined intervals, and the front tower and a predetermined tower are connected to each other. A suspension girder that can be lifted and lowered can be installed horizontally across a gate-structured rear tower that is installed upright with a certain distance, and the width of the front and rear towers is set so that it does not project outside the width of the girder. The suspension girder is provided with a long-threaded rod-shaped suspension for suspending and supporting the girder, and when the girder that is placed on the trolley and moves past the rear tower, the leg ends of the rear tower are raised. The jack that lifts up a little higher than that is built into the rear tower, and it is configured to be lowered to the original position after passing the girder to be grounded.

[Action]

The operation based on the above means is as follows. First, the traveling girder is moved and bridged between the piers where the girders are to be erected in advance and between the piers ahead of the piers.

Then, the front tower and the rear tower on which the hanging girder is placed horizontally move forward to the space between the piers on which the girder is going to be mounted and stop as the handrailer moves forward. At this time, the rear part of the hanging girder moves while being supported by the carriage.

Then, lift the hanging girder, put the girder on the trolley that runs along the existing girder installed in advance on the pier,
Move it forward and stop the girder when the rear tower approaches. Next, after the rear part of the hanging girder is supported by the temporary carrier mounted on the girder, the lifting girder is used as a scaffold by the jack built into the rear tower, and the leg end of the rear tower is raised to the highest part of the girder on the bogie. After launching a little above, the jack support member and the pedestal of the rear tower are connected by a shaft and positioned, and in this state, the carriage between the existing girder or traveling girder and the leg end of the rear tower. The upper girder moves forward to the desired position between the piers, and then stops.

After the above-mentioned girder has completely passed through the rear tower, the rear tower is hung with its built-in jack using the hanging girder as a scaffold, and the leg ends are grounded to the original position for installation.

At this time, after lifting the suspension girder a little and positioning it to remove the temporary carrier, suspend the long threaded rod-shaped suspension on the suspension girder and attach the lower end part to the girder to suspend it. The girder is supported and lifted up a little to separate the girder from the running girder.

Then, the traveling girder was moved further forward along the handcuff and through the roller mechanism, and the tip of the traveling girder was placed on the front pier. The running girder that had been used is removed. Then, when the suspension girder is lowered, the girders are installed on the adjacent piers, and one step is completed by removing the suspension.

〔Example〕

 An embodiment based on the above means will be described with reference to the drawings.

FIG. 1 is a schematic front view of a girder erection device according to the present invention, FIG. 2 is a side view taken along the line 1-1 of FIG. 1 in which the front tower is omitted and the inside is shown, and FIG. 3 is FIG. Side view along line 3-3 of
Fig. 4 is a front view showing a state where the rear tower is raised and the PC girder is passed just below the lower end of the tower, and Fig. 5 is a front view.
5 is a side view taken along line 5-5 in FIG. 6, FIG. 6 is a side view taken along line 6-6 in FIG. 4, FIG. 7 is a side view taken along line 7-7 in FIG. 4, and FIG. 4 is a side view taken along line 8-8 of FIG. 4, FIG.
FIG. 16 is a schematic side view showing a girder erection process, FIG. 17 is a side view taken along line 17-17 of FIG. 13, FIG. 18 is a side view taken along line 18-18 of FIG. 13, and FIG. FIG. 19 is a side view taken along the line 19-19 in FIG.

In the figure, 1 is a front tower, 2 is a rear tower, and 3 is a hand laying machine, the base end of which is integrally connected to the front tower 1. 4 is a hanging girder that is horizontally extended across the front tower 1 and the rear tower 2, 5 is a traveling girder that moves forward or backward on the pier via a hand-drawing machine 3, and 6 is on a rail laid on the traveling girder. A traveling bogie, 7 is a laying PC girder that is moved by placing it on a dolly 6 arranged at appropriate intervals in the front and rear, and 8 is for suspending and supporting the PC girder at a position directly below the hanging girder 4. This is a long-threaded rod-shaped hanger, which is suspended from the hanging girder 4.

9 is a temporary trolley which runs on the PC girder 7 and supports the hanging girder 4, 10 is a bridge pier, and the adjacent up train T on the railway
And a standing train at a relatively narrow distance W ″ between the down train T ′. Reference numeral 11 denotes a roller mechanism provided on the hand stretcher 3, which stably supports and guides when the traveling girder 5 moves forward. 12 is a jack that allows a center hole jack built in each tower to lift or lower the front and rear towers 1 and 2, and leg end 1 ₁ and 2
₁ is enabled to jack up until a little above the level of the highest portion of the PC digits placed on carriage 6.

Reference numerals 13 and 14 denote horizontal beam members arranged at a predetermined interval between the left and right pedestals. The left and right ends of the horizontal beam members are slidably aligned with the abdominal plates 15 and 16 of the pedestal, and the upper horizontal beam member 13 is provided. Is fixed to the pedestal, the lower cross beam member 14 is allowed to slide up and down with respect to the pedestal, holes 17 are formed in the left and right end portions of the lower cross beam member 14, and holes 18 are also formed in the side surfaces of the pedestal. The lower horizontal beam member 14 can be positioned on the pedestal with the connecting shaft 19 open.

The front tower 1 and the rear tower 2 form a gate structure using an H-shaped steel material for the pedestal, and the width W is the width W of the PC girder 7.
It is set so that it does not stick out further.

In this case, the rear tower 2 is shown in FIGS.
As shown in the figure, the PC girder 7 and the temporary carrier 9 positioned above it
The hanging girder 4 supported via the above is used as a scaffold for the jack 12 to lift or lower.

The hand stretcher 3 is a steel frame shape framed to a length that allows it to be bridged over the interval S between the adjacent piers 10, and is set to a length corresponding to the interval S between the piers and has a traveling girder inside. A roller mechanism 11 for stably guiding 5 is provided.

The hanging girders 4 are arranged inside the front and rear gate-structured towers 1 and 2 and are laterally suspended, and are set so that vertical movement can be adjusted in the height direction of each tower. In addition, insertion holes 41 are provided at both end portions in the length direction of the hanging girder so as to suspend and suspend the hanging tool.

The traveling girder 5 has a structure in which the total length L is set to be twice as long as the interval S between adjacent piers and can be smoothly moved forward or backward by the roller mechanism 11 of the hand-drawing machine 3.

The trolley 6 travels on a rail laid on a plane in the lengthwise direction of the traveling girder 5, and supports the front and rear parts of the PC girder 7 to move it between the desired piers.

The PC girder 7 has the hanging girder 4 at both end portions in its length direction.
There are holes 71, 71 for the hanging tool facing the holes 41, 41 of the.

The suspending tool 8 uses what is called a Gevin disturb, and the upper end part of the long screw rod is hooked on the hanging girder 4 via the length adjusting mechanism 81, and the lower end part is passed through the hole 71 of the PC girder. It is designed to be suspended and supported by an appropriate stopper.

The temporary carrier 9 is of substantially the same shape and size as the above-mentioned carrier 6, and is placed on the PC girder 7, and the hanging girder 4 is supported on the temporary carrier.

[Specific process example]

Next, a concrete example of the erection process of the girder based on the above embodiment is as follows.

First, the traveling girder 5 is installed in advance on the space S between the piers 10 and 10 on which the PC girder 7 is to be erected and the pier 10 'in front of the pier, and then the width W of the PC girder 7 should not be overhanged. The suspension girder 4 is passed over the front tower 1 and the rear tower 2 of the gate structure set in the above so that the suspension girder can be raised and lowered horizontally, and the rear part of the suspension girder is supported by the carriage 6. After that, when the hand stretcher 3 is moved forward along the traveling girder 5, the front and rear towers 1 and 2 and the hanging girder 4 also move forward.

Then, the front and rear towers 1 and 2 were stopped at a position located between the desired piers 10 and 10, and then the suspension girder 4 was lifted up, and then laid on the plane of the existing PC girder installed on the pier in advance. When the PC girder 7 on the carriage 6 traveling along the rail is moved forward and approaches the rear tower 2, the
Temporary trolley 9 with the PC girder 7 stopped and placed on the PC girder
After the suspension girder 4 is supported by the above, the jack 12 of the rear tower 2 is lifted. As a result, when the lower cross beam member 14 sliding on the rear tower 2 lifts the rear tower 2 using the hanging girder 4 as a scaffold, its leg ends
Raise 2 _{1 a} little above the height of the PC girder 7 on the dolly. At this time, it is assumed that the lower cross beam member 13 and the holes 17 and 18 formed in the pedestal of the rear tower are passed through the connecting shaft 19 to be positioned.

In this state, the PC girder 7 on the bogie is moved further forward and stopped at the desired position between the piers 10 and 10.

In this state, the rear tower 2, to ground the foot end 2 ₁ and扛下to the girder 4 hanging by its internal jack 12 to the scaffold to the original position. Then, after lifting the hanging girder 4 a little and removing the temporary carrier 9, the long-threaded rod-shaped hanger 8 is inserted into the hole 41 of the hanger girder 4 and hooked, and the lower end part of the girder 4 is fixed. Through the hole 71, attach with an appropriate stopper, and adjust the length appropriately.
The suspension girder 4 is adjusted while being adjusted by 81, and the suspension girder 4 is lifted to some extent, then fixed and separated from the traveling girder 5.

Next, the traveling girder 5 was moved forward along the handcuffing machine 3 through the roller mechanism 11 thereof, and the tip end thereof was further bridged to the front pier 10 ″, and was suspended and supported by the suspension girder 4. The rear half of the traveling girder 5 located directly below the PC girder 7 is moved and removed to form a space between the piers 10 and 10. Therefore, the suspension girder 4 is lowered to adjoin the PC girder 7 to the adjacent pier. It is installed on top of 10 and adjacent to the existing girder 7 ', and one step is completed by removing the hanger 8.

〔The invention's effect〕

INDUSTRIAL APPLICABILITY Since the present invention has the above-described configuration, particularly in the work of replacing an elevated rail in a railway, it is necessary to construct a girder in a narrow space where adjacent up trains and down trains pass each other at a space without a space, and a rear portion is provided as in the conventional case. Instead of passing inside the gate structure of the tower, it has a width that is approximately the same as the left and right pedestal parts of the rear tower, so that the leg ends are lifted to form a space and the girder passes through that space part. By doing so, the width of the tower can be greatly reduced, so that the gate-structured tower can be used even in a considerably narrow place, the work is efficient and safe, and Can be shortened and cost can be reduced.

[Brief description of drawings]

The drawings show an embodiment of the girder erection device according to the present invention. FIG. 1 is a schematic front view of the girder erection device according to the present invention, and FIG. 1-1 of the figure
Fig. 3 is a side view taken along the line, Fig. 3 is a side view taken along the line 3-3 in Fig. 1, and Fig. 4 is a front view showing a state in which the rear tower is raised and the PC girder is passed directly under the lower end of the tower. 5 is a side view taken along line 5-5 in FIG. 4, and FIG. 6 is 6- in FIG.
6 is a side view taken along line 6, FIG. 7 is a side view taken along line 7-7 of FIG. 4, FIG. 8 is a side view taken along line 8-8 of FIG. 4, and FIGS. Figure 17 is a schematic side view showing the installation process.
FIG. 17 is a side view taken along the line 17-17, FIG. 18 is a side view taken along the line 18-18 in FIG. 13, and FIG. 19 is a side view taken along the line 19-19 in FIG. 1 …… Front tower 2 …… Rear tower 3 …… Hand spreading machine 4 …… Suspending girder 5 …… Running girder 6 …… Bogie 7 …… PC girder 8 …… Suspension tool 9 …… Temporary receiving cart 10 …… Bridge pier 11 …… Roller mechanism of hand-rolling machine 12 …… Jack

Claims (2)

[Claims] 1. A suspension girder is passed between a gate-structured front tower and a rear tower, which is set to a width that does not extend beyond the lateral width of the girder, and is suspended horizontally, and a handcuffer is provided in the front tower. The front and rear towers are placed on the pier, and immediately below the suspension girder, the girder placed on the trolley and moved forward stops when the girder approaches the position of the rear tower, and the rear tower is slightly above the girder height. After raising it to the upper part, move the girder on the trolley between the leg end of the rear tower and the traveling girder placed on the bridge pier, and after passing the rear tower part, return the rear tower to its original position. After suspending the girder, and then suspending the girder by suspending it from the traveling girder with a long threaded rod-shaped suspension hung on the suspension girder, and then moving the traveling girder forward through the hand extender. , Hang the girder together with the hanging girder on the pier Digit erection construction method installed, characterized in that the removal of the load block. 2. A gate-structured front tower is integrally connected to a base end of a hand laying machine erected on a bridge pier at a predetermined distance, and is erected while maintaining a predetermined distance from the front tower. A hanging girder that can be lifted and lowered is horizontally installed on the gate type rear tower, and the width of the front and rear towers is set so that it does not project outside the width of the girder. A long threaded rod-shaped hanger for suspending and supporting the tower is provided, and when the girder that moves on the trolley passes through the rear tower, the leg ends of the rear tower are lifted slightly above the girder height. A girder erection device, characterized in that a jack is built in the rear tower, and the girder is constructed so that it is grounded after passing through the girder.