JPH0841828A - Bridge girder erection equipment - Google Patents

Abstract

PURPOSE:To provide erection equipment for bridge girders which is relatively a small scale device and does not require support ropes and which can be traversed to the installation position of a bridge girder and also constructs a curved bridge having different girder lengths. CONSTITUTION:Conveyance trucks 50, 60 suspending bridge girders on a girder 10 are placed by use of the steel girder 10. A front side support device 20 and a rear side traversing device 70 are provided so as to traverse the girder 10 as the bridge girder remains suspended. When the girder 10 is transferred to the next span, the girder 10 can be made low.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bridge girder erection device used for erection of a precast concrete bridge girder.

[0002]

2. Description of the Related Art There is a technology for constructing a bridge by straddling a plurality of precast concrete bridge girders, especially prestressed concrete bridge girders (PC girders) on a pier in a span. Using a steel girder for erection of this PC girder is performed as a general method. There are two main types of conventional bridge girder erection methods. (A) Upper path type The outline is illustrated in FIGS. 15 is a side view,
FIG. 16 is a front view thereof.

A steel girder 202 is installed on the bridge piers (or abutments) 201, 201, which are led by the hand-held girder 203.
And the gate cranes 204, 204 are installed on the bridge piers (or abutments) 201, 201, respectively, and the PC girder 2
05 is pulled out on the steel girder 202 with a trolley 206,
The two ends of the PC girder 205 are hoisted by two gate-type cranes 204, 204, and the traversing dolly 207 of the gate-type crane laterally moves to a predetermined installation position and hangs it down and installs it on the bearing (pier pier 201). This system is a gate crane 20
It is necessary to install 4 independently, and this gate type crane 2
A large number of support lines 208 for stopping the trains 04 are required, and there is a limitation particularly on the work such as on the railway. Also pier 20
When there is no room in the bridge width direction of No. 1, there is no installation space for the legs 209 of the gate crane 204, and the gate crane 2
It is necessary to separately provide a temporary support member 210 (bridge bracket or support) that supports 04.
There was a problem with the stability of 4.

When the girder length is different inside and outside the curve like a curved bridge and the girder length changes within the span, the gate-shaped cranes 204, 204 are installed in a non-parallel manner to make the girder length slightly longer. Although it is possible to cope with the change, if the change becomes large, it will be very troublesome to move the suspension point position. (B) Suspension type FIGS. 17 and 18 schematically show the suspension system. FIG. 17 is a side view, FIG. 18 is a front view thereof, and the left half is a forward bridge pier,
The right half shows the rear abutment (or pier).

A steel girder 223 is installed on a front pedestal 224 provided on the pier 222 and a rear pedestal 225 provided on the abutment (or pier) 221. The height of the steel girder 223 is set to a height at which the PC girder 226 between the installation spans can be suspended and moved below the steel girder. The leading end of the PC girder 226 is suspended by a girder suspension trolley 227 placed on the steel girder 223, and the rear end is supported by a trolley 228 traveling on the ground or an existing girder to be pulled out and moved forward. When the dolly 228 on which the rear end of the PC girder 226 is placed reaches the position of the rear pedestal 225, the rear end of the girder is hung on the rear girder trolley 2.
When the leading end of the PC girder 226 reaches the pier 222 after being suspended at 29, it is hung down and replaced by another means, for example, a lateral movement device, and laterally moved to a predetermined installation position for installation.

Also in this method, it is necessary to install the steel girder 223 at a position higher than the total of the girder height of the PC girder 226, the carriage 228 and other heights, and especially the steel girder on the erection front pier 222. The pedestal 224 was required to be higher, and the supporting line 230 was required, and the same problems as those of the above-mentioned upper road type remained. Also, since it is not easy to move the girder in the width direction of the bridge and the girder pull-out position is fixed, the girder can be laterally moved to the girder installation position with a lateral movement device using steel balls or steel rollers under the girder. , It was set on the bearing (pier 222) using a jack. This work was very unstable and required skilled workers.

For the construction of a curved bridge having different girder lengths within the span, the suspension method requires steel girder supports 224, 225.
Since it was fixed, it was almost impossible to deal with the lateral movement of the girder on the curved bridge.

[0008]

In order to solve these problems, the present inventors have proposed in JP-A-5-79018 a erection device using two steel girders as a bridge girder erection device. The technology is most suitable for erection of long and heavy bridge girders, but the construction of a relatively small bridge girder with a girder length of about 35 m and a girder weight of about 100 tons requires too much equipment, which is uneconomical. It came out.

Therefore, the present invention uses a single steel girder to have the same function as the technique of the above-mentioned Japanese Patent Laid-Open No. 5-79018 and to pursue economical efficiency. It is an object of the present invention to propose an erection device that solves the problems peculiar to the girder made by the manufacturer. The problems of the present invention are as follows. (A) Correspond to changes in girder length of curved bridges. (B) Equipment of a relatively small scale. (C) There is no need for ropes. (D) It is possible to move laterally to the mounting support position and does not require a skilled worker.

[0010]

The present invention is characterized by taking the following technical means in order to solve the above problems. That is, according to the present invention, one steel girder having a front support device and a rear support device capable of laterally moving the girder, on which a carrier truck for suspending and advancing the bridge girder is mounted, and a girder lifting mechanism is provided. A bridge girder erection device is provided.

In this device, the rear supporting device has a wheel supporting part movable between the steel girder and the steel girder in the longitudinal direction of the steel girder, and a roller supporting part movable in the longitudinal direction of the steel girder on the bottom of the leg. And a fixed leg having a. In the present invention, the erection device itself is movable in the longitudinal direction and the lateral direction, is composed of one steel girder, and has mechanical stability.
The structure does not require any external supporting means. Furthermore, the steel girder itself can be raised and lowered, and when moving to the front span, the steel girder is lowered to lower the center of gravity, so that the girder can be moved in a stable posture.

The device of the present invention basically uses an electric motor and is controlled by a push button so that even an unskilled operator can easily operate the device.

[0013]

The bridge girder erection device of the present invention has the following functions due to the above configuration. a) Only one steel girder can be used for erection of a relatively small bridge girder without excessive equipment. b) Since the steel girder itself is configured to be movable in the lateral direction, the girder can be laterally moved while the bridge girder is suspended and the bridge girder can be lowered to any position in the width direction of the bridge.

C) The lateral moving device laterally moves the girder on the rail provided along the pier. Since the girder support position of the rear support device moves in the girder length direction, bridge girders of different lengths can be installed in the same span between spans in which the bridge piers are non-parallel. In other words, it is possible to construct a curved bridge girder. d) The height of the steel girder was lowered when the steel girder was moved to the forward radius. Therefore, stable radial movement is possible.

E) Since it is not necessary to separately prepare a gate crane or use a rope, stable work can be performed.
It requires less man-hours.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A bridge girder erection device 1 according to an embodiment will be described in detail below with reference to the drawings. FIG. 1 is a side view showing an entire bridge girder erection device 1 according to an embodiment of the present invention. Bridge girder erection device 1
Is a steel girder 10, a front support device 20, transport carriages 50, 60, a rear traverse device 70, and a rear gate type vent 80.
And a hand girder 120.

FIG. 2 shows a side view of the front support device 20, and FIG. 3 shows a front view thereof. The front supporting device 20 is a pier 201.
The steel girder 10 is mounted on the top and supports the leading end of the steel girder 10, and the hand girder 120 is attached thereto. The hand girder 120 allows the steel girder 1 to move when the steel girder 10 is advanced to the next span.
Support the leading edge of 0 on the next pier. Front support device 20
The traverse rail 24 provided on the pier 201 is provided at the lower end of the
It includes a traverse device 25 having a drive device 25a traversing above, and double-legged outriggers 21, 21 having wheel devices 22 that roll. The wheel device 22 is provided with four wheels, that is, four wheels running vertically from above and below the rail, sandwiching the rail, a total of eight wheels, and supports the front support device 20 so as not to fall sideways.

The front end of the steel girder 10 is attached to the front supporting device 20 by the upper and lower pins 11 and 12. And the pin 11 for lowering and mounting the steel girder
a, 12a, 11b, 12b. FIG. 2 shows a state where the carrier truck 50 having the PC girder 100 hung is moving to the leading end of the steel girder 10. The carrier 50 includes suspension beams 51 that extend to both sides of the steel girder 10, suspends a chain block 52 at both ends thereof, and suspends a beam 53 at a suspension tool 53 at the lower end of the suspension rope of the chain block 52. Is installed. The suspension beam 54 is shown in FIG.
As shown in FIG. 3, the hanging fixture 55 of the PC girder 100 fixes the girder to the girder. The front support device 20 is traversed to move the position of the steel girder 10 to the girder lowering position, and the chain block 52 is operated to lower the PC girder 100 to a predetermined position.

FIG. 5 shows a state in which the front supporting device 20 lowers the PC girder 100 at the outermost end on the pier 201. The outriggers 21 on the side edges must traverse beyond the stoppers on the rails 24. At this time the outrigger 21 on the side edge
Are retracted to the retracted position 21a (see FIGS. 2 and 5), and the wheels 22 of the inner outrigger 21 support the wheels 22 below the rails 24 against a fall.

The operation of lowering the position of the steel girder 10 by changing the mounting positions of the steel girder 10 and the front supporting device 20 is as follows.
This is performed by using the chain block 52 of the carriage 50.
The carrier truck 50 is advanced to the front end of the steel girder 10, and the hanging beam 51 is attached to the frame 30 at the upper end of the front supporting device 20.
To the girder suspension beam 5 (locking position 51a in FIG. 2).
4 is locked to the bottom side of the steel girder 10 (locking position 54a in FIG. 2), the pins 11 and 12 are pulled out, and the chain block 5
2 is operated to lower the steel girder 10. Then, the pins are attached to the positions of the pins 11a and 12a or the pins 11b and 12b. When raising the steel girder 10, the procedure is reversed.

FIG. 6 is a side view of the rear traverse device 70, and FIG. 7 is a front view thereof. The rear traverse device 70 includes the existing girder 101.
It is mounted on and supports the steel girder 10. The rear traverse device 70 includes two front and rear wheels 7 mounted on a support portion 72.
1 supports the lower bottom surface of the steel girder 10 so as to respond to changes in the supporting position of the steel girder.

The lower end of the rear traverse device 70 is supported by a traverse device 73 having four traverse wheels 74 on the left and right. This traverse wheel 74 travels on a support rail 75 laid in the traverse direction of the steel girder by a drive device 74a. Traverse rail 24 of front support device 20
And the support rails 75 of the rear traverse device 70 are not parallel, for example, in the case of a curved bridge, the support position changes when the steel girder 10 moves laterally. The wheel 71 is adapted to follow the change in the supporting position.

In FIGS. 6 and 7, the rear carrier 60 is a PC.
The state in which the girder 100 is suspended is also shown. The structure and operation are the same as those of the front transport carriage 50. FIG. 8 shows the position of the rear traverse device when the girder at the outermost end is installed. FIG. 9 is a front view of the rear gate type vent 80, and FIG.
Fig. 0 shows a detailed side view of the legs. Rear gate type vent 8
0 is composed of two legs 81 and a coupling frame 82 that integrally couples the legs 81 and the steel girder 10. The leg 81 has a lower leg 83 having a hydraulic jack 88 built therein and is extendable and contractible. The joint 89 is adapted to be pin-coupled at the same height as the joint between the steel girder 10 and the front supporting device 20. On the bottom surface of the lower leg of the rear gate type vent 80, a rolling device 84 including a base plate 87 and a receiving plate 85 having a roller 86 rollable in the longitudinal direction of the steel girder 10 is attached. The rolling device 84 absorbs the horizontal force generated by the bending deformation of the girder when the steel girder suspends the girder.

Next, specific examples of the present invention will be described. The equipment configuration is as follows. Length of steel girder body: L = 45m Length of hand girder: L = 39.6m Rear gate vent: (legs, hydraulic jacks, horizontal force absorbing device (transfer device)) Rear traverse device: (Truck carriage , Intermediate vent, roller) Front support device: Outrigger type auxiliary wheel, front traverse trolley, hydraulic jack, girder suspension during movement) Front transport trolley (chain block suspension) Rear transport trolley (chain block suspension) Front delivery roller Hand Self-propelled bogie with extended tip temporary leg (used to pull in PC girder and move erection equipment) Construction procedure (1) Assemble the bridge girder erection equipment in the rear yard of the first span, and pull out and install on the span. At this time, the steel girder 10 includes the front supporting device 20 and the rear gate type vent 80.
The backward traverse device 70 is laterally retracted from a position directly below the steel girder 10. (See FIG. 1). (2) As shown in FIG. 1, the PC girder 100a is retracted from the rear yard by mounting it on a carriage. The rear end of the PC girder 100a is placed on the self-propelled carriage 90. (3) Pull the PC girder 100a under the steel girder 10,
The tip of the PC girder 100a is suspended by a chain block on the front carrier 50a on the steel girder 10. (4) When the front end of the PC girder 100a is received by the front carrier truck 50a and the rear end is received by the self-propelled carriage 90 and is pulled out to the erection radius, and when the rear end of the PC girder 100a passes through the rear gate type vent 80, P
The rear end of the C girder 100a is transferred to the rear transport carriage 60 on the steel girder 10 by a chain block, and the front and rear transport carriages 50 and 60 move to the erected regular position (see FIG. 1 so far). (5) After pulling out the PC girder 100a to the erected position, retract the jack 23 built in the lower part of the front support device 20,
The load of the front support device 20 is transferred to the traverse device 25 (see FIG. 3). At the same time, the rear traversing device 70 retracted on the rear traverse rail 75 is drawn directly under the steel girder 10 (see FIG. 7), and the jack 88 incorporated in the rear gate-shaped vent lower leg 83 is contracted (see FIG. 9). The load is transferred to the rearward traverse device 70 (see FIG. 6). (6) Move the traversing device 25 of the front supporting device 20 and the entire erection device including the PC girder supported by the rear traversing device 70 to the bridge width direction PC girder installation bearing position, and set P on the bearing.
Set C digit 100. (7) After installing the PC girder 100, return the entire bridge girder erection device to the PC girder pull-out rail position from the yard, set the jack 23 at the lower part of the front support device 20, and set the rear gate type vent 80 built-in jack 88, The rear traverse device 70 is retracted, the front and rear carriages 50, 60 are pulled back to the rear end of the steel girder 10, and the next PC girder 100 is returned.
Prepare to pull in. (8) The above steps (2) to (7) are repeated a predetermined number of PC girders between the spans. (9) After the installation of the predetermined number of PC girders is completed, the bridge girder installation device is moved to the next installation span. (10) Repeat the above work for the required span.

Next, the procedure for moving the bridge girder erection device to the next erection radius will be described with reference to FIGS. (A) Extend the rail for pulling out the girder to the front of the span where the construction was completed. (A) The tip temporary support device 121 of the hand extending girder 120 is fixed. (C) Remove the intermediate vent 70a of the rear traverse device 70 (arrow 151 in FIG. 11). (D) The rear traverse device 70 and the traverse rail 75 are moved to the installed span front position 152 and installed (arrow 153 in FIG. 11). (E) The feeding roller 154 under the front supporting device 20 is moved onto the front-to-front pier 201b (arrow 15 in FIG. 11).
5). (F) The front support device 20 is supported by the built-in jack 23. (G) The front carrier 50 is replaced with the upper frame 30 of the front supporting device 20. (H) The front portion of the steel girder 10 is suspended and supported by the chain block 52 of the front carrier truck 50. (X) The entire steel girder 10 is lowered by the chain block 52 supporting the front part of the steel girder 10 and the hydraulic jack 88 built in the rear gate type vent 80 supporting the rear part of the steel girder 10. FIG. 12 shows this step, and the arrow 161 indicates the operation direction. The steel girder 10 has descended to the position 10a. (U) The front end of the hand-rolled girder 120 has a front feed roller 15
4. The front part of the steel girder 10 is supported by the roller 71 on the backward traverse device 70, and the rear end of the steel girder 10 is supported by the temporary receiving stand set on the self-propelled carriage 156, and is driven by the self-propelled carriage 156. Move forward. FIG. 13 shows this moving step, in which the entire apparatus is moving in the direction of arrow 171. At this time, the bridge girder erection device includes the front feed roller 154, the rear traverse device 152,
It is supported by three points of the self-propelled carriage 156. (S) As shown in FIG. 14, when moving to a predetermined position, the lower jack 23 of the front supporting device 20 receives the load,
The front feed roller 154 is retracted, the chain block 52 supporting the front part of the steel girder 10 is rolled up, and at the same time, the steel girder 10 is moved to the arrow shown in FIG. 14 by the hydraulic jack 88 built in the rear gate type vent 80. It rises like 181, adjusts the front and back, and fixes. (Vi) The front traverse rail 24 and the rail 75 of the rear traverse device 70 are installed, and the PC girder 100 is prepared for retraction.

According to the apparatus of this embodiment, since the steel girder is roller-supported on the upper part of the rear traverse device 70 supporting the rear portion of the PC girder, when the PC girder is laterally moved and installed, The steel girder support position of the traverse device 70 can be moved back and forth in the bridge axis direction. Therefore, even when girders having different girder lengths are installed over the same diameter, it is possible to smoothly cope with them.

Further, when the PC girder is pulled in, the horizontal force generated by the load deflection of the steel girder can be absorbed by the rolling device under the rear gate type vent, and the generation of extra stress can be prevented.

[0028]

Since the bridge girder erection device of the present invention is constructed as described above, the bridge girder can be easily erected with a simple device using one steel girder. Also, the construction of curved bridges has become extremely easy. In addition, brackets, temporary columns, and tie wires such as trawlers are no longer required, and it is possible to safely erect the railway line.

[Brief description of drawings]

FIG. 1 is a side view showing an entire bridge girder erection device of an embodiment.

FIG. 2 is a side view of a front support device of the bridge girder erection device of the embodiment.

FIG. 3 is a front view of a front support device of the bridge girder erection device of the embodiment.

FIG. 4 is a front view of the girder suspension device of the embodiment.

FIG. 5 is a front view of a front support device of the bridge girder erection device of the embodiment.

FIG. 6 is a side view of a rear traverse device of the bridge girder erection device of the embodiment.

FIG. 7 is a front view of a rear traverse device of the bridge girder erection device of the embodiment.

FIG. 8 is a front view of a rear traverse device of the bridge girder erection device of the embodiment.

FIG. 9 is a front view of a rear gate type vent of the bridge girder erection device of the embodiment.

FIG. 10 is a partial side view of the rear gate type vent of the bridge girder erection device of the embodiment.

FIG. 11 is an explanatory diagram of forward movement of the bridge girder erection device of the embodiment.

FIG. 12 is an explanatory diagram of forward movement of the bridge girder erection device of the embodiment.

FIG. 13 is an explanatory diagram of forward movement of the bridge girder erection device of the embodiment.

FIG. 14 is an explanatory diagram of forward movement of the bridge girder erection device of the embodiment.

FIG. 15 is an explanatory diagram of a conventional bridge girder erection device.

FIG. 16 is an explanatory diagram of a conventional bridge girder erection device.

FIG. 17 is an explanatory diagram of a conventional bridge girder erection device.

FIG. 18 is an explanatory diagram of a conventional bridge girder erection device.

[Explanation of symbols]

1 bridge girder erection device 10 steel girder 11 pin 12 pin 20 front support device 21 outrigger 22 wheel device 23 jack 24 rail 25 traverse device 25a drive device 30 frame 50 carrier truck 51 hanging beam 52 chain block 53 lifting device 54 girder hanging beam 55 Hanging Hardware 60 Transport Cart 70 Rear Traverse Device 70a Intermediate Vent 71 Wheel 72 Support Part 73 Traverse Device 74 Traverse Wheel 74a Drive Device 75 Rail 80 Rear Gate Vent 81 Leg 82 Frame 83 Lower Leg 84 Rolling Device 85 Support Plate 86 Roller 87 base 88 hydraulic jack 89 coupling 90 self-propelled carriage 100 PC girder 101 existing girder 120 hand girder 121 front temporary support device 201 bridge pier (or abutment) 202 steel girder 203 hand girder 204 gate crane 205 PC girder 206 Trolley 207 Traverse trolley 208 Support 209 Legs 210 Supports 221 Abutments (or piers) 222 Abutments 223 Steel girder 224 Cradles 225 Cradles 226 PC girders 227 Cradles 228 Cradles 230

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yutaka Kato 3-4-1, Marunouchi, Chiyoda-ku, Tokyo P-S Co., Ltd. (72) Masahisa Ueno 2-21-19 Shinmei, Urawa-shi

Claims (2)

[Claims] 1. A bridge girder erection apparatus, comprising a front support device and a rear support device capable of laterally moving a girder, on which a carrier truck for suspending and advancing the bridge girder is mounted, and a girder elevating mechanism. Bridge girder erection device characterized by consisting of the steel girder of. 2. The rear supporting device includes a supporting device having a wheel supporting portion movable between the steel girder and the steel girder in a longitudinal direction of the steel girder, and a roller movable in a longitudinal direction of the steel girder on a bottom of a leg. The bridge girder erection device according to claim 1, comprising a gate-shaped vent having a support portion.