JP2006299650A - Launching method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a launching method without requiring an installation girder. <P>SOLUTION: A method crosses a girder 11 supported by a plurality of piers 12 in grade separation above a straddling object 10. In the sending out method, among the piers 12 for supporting the girder 11, the mutual optional piers 12 except for the mutual piers 12 for sandwiching the straddling object 10 are set as a first section; the mutual piers 12 adjacent to the opposite side of the straddling object 10 side of the first section is set as a second section; a first girder is assembled in the first section; a second girder is assembled in the second section; the first girder is lifted by a lifting means, and is placed on the pier 12 by sending out to the straddling object 10 side; the second girder is lifted by the lifting means, and is placed on the pier 12 by sending out to the straddling object 10 side, and is formed as the launching girder 11 by contacting and joining an end part of the second girder and an end of the first girder, and is sent out to the straddling object 10 side by a launching means while supporting a load by a support means. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a feeding method for a bridge girder or the like.

  Conventionally, a feeding method is known as a method of laying girders on straddling objects such as railways, roads, rivers, and canyons. As shown in FIG. 18, the feeding method is such that a vent 51 is installed between the piers 12 including the pier 12 in the case of the straddling object 10, and a construction girder 52 is provided on the vent 51, and the girder 11 and the spreader 20. Assemble (hereinafter referred to as ground assembly). After the assembly, the beam 11 is sent out by the carriage 53. An example of this delivery method is disclosed in Patent Document 1 and Patent Document 2 below.

JP-A-9-31915 JP-A-8-60620

  However, in the feeding method disclosed in Patent Document 1 and Patent Document 2, the installation girder 52 needs to be installed over the entire length including the girder 11 and the hand extender 20. In these cases, when the spanning object 10 is wide or the height of the pier 12 is high, the equipment weight of the vent 51 and the erection girder 52 is increased, and accordingly, the construction period is prolonged and the construction cost is increased. Resulting in.

  Accordingly, an object of the present invention is to provide a delivery method that does not require a construction beam.

  A sending-out method according to a first invention (corresponding to claim 1) that solves the above-mentioned problem is a method in which a girder supported by a plurality of bridge piers is three-dimensionally crossed above a straddling object, and supports the girder. Among the piers, between the piers other than between the piers sandwiching the straddling object is a first section, and between the piers adjacent to the straddling object side of the first section is a second section. Assembling the first girder in the first section, assembling the second girder in the second section, ascending the first girder by the lifting means, sending it to the straddling object side and placing it on the pier, The second girder is raised by the ascending means, sent to the straddling object side, placed on the pier, and further fed out the second girder, the end of the second girder and the end of the first girder The parts are brought into contact with each other to form a feeding girder, and the supporting girder is loaded by the supporting means. While supporting the, characterized in that sending the object side straddle said feeding digits by delivery means.

  A delivery method according to a second invention (corresponding to claim 2) that solves the above-mentioned problems is the delivery method according to the first invention, wherein the lift means is a large lift raising device that can be expanded and contracted vertically as the raising means. And a device vent that supports the large lifting device and a support vent that supports the first and second girders.

  A delivery method according to a third invention (corresponding to claim 3) that solves the above-mentioned problem is the delivery method according to the first invention or the second invention, wherein the wire and the wire are pulled as the delivery means. A wire clamp jack is used.

  A delivery method according to a fourth invention (corresponding to claim 4) that solves the above-described problem is the delivery method according to any one of the first to third inventions, wherein the support means includes the delivery girder. It is characterized by using an extendable extender that can be installed at the end.

  According to the delivery method according to the first aspect of the present invention, since the girder is assembled on the ground, the assembling accuracy of the girder can be improved. In addition, because the installation girders and vents used in the conventional delivery method are not required, equipment can be omitted and work efficiency can be improved even when the spanning object is wide or the height of the pier is high. As a result, construction costs can be reduced.

  According to the delivery method according to the second aspect of the present invention, as the lifting means, a large lifting device capable of stretching and contracting, a device vent that supports the large lifting device, and a support vent that supports the first and second girders. Because no heavy machinery such as crane trucks are required to ascend the bridge girder, work can be performed even when the work space is small or where there is already a structure above the girder. Can do.

  According to the delivery method according to the third aspect of the invention, by using a wire and a wire clamp jack that pulls the wire as the delivery means, the wire is flexible even if the coupling position is slightly different. Even if there is a slight angle, it is easy to handle by guiding the wire, and the tension of the wire itself is easily expanded and contracted by the tension, making it easy to manage the tension. is there.

  According to the delivery method according to the fourth aspect of the invention, it is possible to prevent the delivery girder from being cantilevered by using an extendable telescopic stretcher that can be installed at the end of the delivery girder as the support means. Therefore, even when the interval between the first section and the second section is wide and the lengths of the first and second digits are long, the sending digit can be prevented from collapsing with its own weight.

  An embodiment of a delivery method according to the present invention will be described with reference to FIGS. FIG. 1 is a side view showing an outline of the delivery method according to the first embodiment, FIG. 2 is a side view when the first stage of the delivery method according to the first embodiment is completed, and FIG. 3 is a second view of the delivery method according to the first embodiment. FIG. 4 is a side view when the third stage of the delivery method according to the first embodiment is completed, FIG. 5 is a side view when the fourth stage of the delivery method according to the first embodiment is completed, and FIG. 7 is a side view when the fifth stage of the delivery method according to the first embodiment is completed, FIG. 7 is a side view when the sixth stage of the delivery method according to the first embodiment is completed, and FIG. 8 is a seventh view of the delivery method according to the first embodiment. 9 is a side view when the eighth stage of the delivery method according to the first embodiment is completed, FIG. 10 is a side view when the ninth stage of the delivery method according to the first embodiment is completed, and FIG. FIG. 12 is a side view when the tenth stage of the delivery method according to the first embodiment is completed, and FIG. 12 shows the delivery according to the first embodiment. FIG. 13 is a side view when the twelfth stage of the delivery method according to the first embodiment is completed, and FIG. 14 is a side view when the thirteenth stage of the delivery method according to the first embodiment is completed. 15 is a side view of the delivery method according to the first embodiment at the completion of the fourteenth stage, FIG. 16 is a side view of the delivery method according to the first embodiment at the fifteenth stage, and FIG. 17 is a delivery of the first embodiment. And FIG. 17 is a side view upon completion of the sixteenth stage of the method.

  Hereinafter, an outline of an apparatus used in the delivery method according to the present embodiment will be described. As shown in FIG. 1, a pier 12 provided on an upper portion of a foundation 28 is provided on a ground 27 on a side of a straddling object 10 such as an expressway. The bridge pier 12 is used for three-dimensionally crossing the girder 11 above the straddling object 10.

  A feeding device 13 necessary for feeding the girder 11 in the direction of the straddling object 10 is installed on the upper part of the pier 12. The feeding device 13 can be extended and contracted in the vertical direction, and can be fed by the force of the feeding device 13 itself by providing a driving force.

  At the lower part of the girder 11, a large lift raising device 16 for raising the girder 11 and a support vent 17 for temporarily supporting the girder 11 are installed. Further, a vertical feeding device 18 for sending the beam 11 in the direction of the object 10 is installed at the upper part of the large lift device 16, and a device vent 19 is installed at the lower part.

  In order to prevent the girder 11 from being in a cantilever state when the girder 11 is sent to the straddling object 10 side, the handbill 20 is installed at the end of the straddle object 10 side of the girder 11 and the end on the opposite side The telescopic hand-roller 21 is installed in the door. The hand roll 20 is made of a steel structure. The telescopic handroller 21 is made by nesting a plurality of steel prisms, and this structure enables expansion and contraction.

  In the present embodiment, the four-stage telescopic handrail 21 is formed by using four steel prisms, but the other number of telescopic handrails 21 may be used. Further, the telescopic handrail 21 is coupled to the end portion of the girder 11 through the connecting structure 22. For this reason, by exchanging the connecting structure 22, the telescopic handrail 21 can be attached to the girders 11 at any construction site.

Hereinafter, the work procedure of the delivery method according to the present embodiment will be described for each stage.
[First stage]
A length within a range in which the girder 11 divided for each block 15 is placed in the upper part of the gantry 14 after the gantry 14 (see FIG. 2) is installed on the ground between the piers 12. Just assemble the ground. In this embodiment, the section between the second pier 12 and the third pier 12 from the straddling object 10 shown by A in FIG. 1 is a first section, and the third and fourth piers shown by B are shown. A section between 12 is defined as a second section. FIG. 2 shows a state in which the first stage work has been completed.

[Second stage]
After the work of the first stage is completed, a large lift raising device 16 (see FIG. 3) for raising the girder 11a and a support vent 17 (see FIG. 3) are arranged below the girders 11a (first girder, see FIG. 3). Install). In addition, a vertical feed device 18 (see FIG. 3) is installed on the upper portion of the large lift device 16. Then, the upper portion of the support vent 17 and the upper portion of the vertical feeding device 18 are joined to the lower surface of the beam 11a by bolting or the like. FIG. 3 shows a state where the second stage work is completed.

[Stage 3]
After the work of the second stage is completed, the large lift raising device 16 is extended, the support vent 17 is lifted together with the girders 11a, and the support vent 17 is added to the gap formed thereby. Thereafter, the large lift raising device 16 is contracted, and the device vent 19 is added to the gap formed in the lower part of the large lift raising device 16 that is suspended from the beam 11a, and the large lift raising device 16 is extended again. By repeating these operations, the girder 11a is raised to a height convenient for placing it on the feeder 13a. In the present embodiment, the large lift raising device 16, the support vent 17 and the device vent 19 are raising means. FIG. 4 shows a state where the third stage work is completed.

[Fourth stage]
After the work of the third stage is completed, after the coupling between the beam 11a and the support vent 17 is released, the beam 11a is moved by using the vertical feed device 18 above the large lifting device 16 and the feed device 13a above the pier 12a. It sends out to the straddling target object 10 side, and it is made to mount and support the edge part by the side of the straddling target object 10a on the feeder 13a. In this way, the feeding is performed first from the digit 11a closer to the straddling object 10. FIG. 5 shows a state where the fourth stage work is completed.

[Fifth stage]
After the work of the fourth stage is completed, the upper part of the support vent 17a (see FIG. 6) far from the bridge pier 12a supporting the end of the crossing object 10 side of the girder 11a is joined to the lower part of the girder 11a. Then, leaving the support vent 17a, the large lift raising device 16, the support vent 17 and the device vent 19 are disassembled and removed. FIG. 6 shows a state where the fifth stage work has been completed.

[6th stage]
After the fifth stage work is completed, the second to fifth stage work is also performed on the second section B (see FIG. 2), and the girder 11b (see FIG. 7) is placed on the feeder 13b. Raise it to a convenient height for placement. The girder 11b is fed in the direction of the straddling object 10 by using the vertical feeding device 18 above the large lifting device 16 and the feeding device 13b above the pier 12b. And the sent-out girder 11b and the adjacent girder 11a are joined, and these are couple | bonded by bolting etc. FIG. 7 shows a state where the sixth stage work is completed.

[Step 7]
After the work of the sixth stage is completed, the large lift raising device 16, the support vent 17 and the device are left leaving the support vent 17b farther from the pier 12 supporting the end of the beam 11b on the straddling object 10 side. The vent 19 is dismantled and removed. FIG. 8 shows a state where the seventh stage work has been completed.

[Stage 8]
After the work of the seventh stage is completed, the hand extender 20 (see FIG. 9) is installed by the crane vehicle 23 (see FIG. 9) at the end on the straddling object 10 side of the girder 11 (feeding girder), and the straddling target A telescopic handrail 21 (see FIG. 9) is installed by a crane car 23 at the end opposite to the object 10. In the present embodiment, the telescopic handrail 21 is a support means. In addition, the crane 20 and the extendable crane 21 are installed by a crane car 23. In this case, since the crane car 23 works on the inner side of the width of the girder 11, the construction area is narrow. Work can be done. FIG. 9 shows a state where the eighth stage work has been completed.

[9th stage]
After the work of the eighth stage is completed, a wire 24a (see FIG. 10) is coupled to an end portion (hereinafter, rear end portion 21a) on the straddling target object 10 side of the telescopic handbill 21, and the wire 24a is connected to the telescopic hand. By pulling with a wire clamp jack 25a (see FIG. 10) installed on the bridge pier 12b on the straddling object 10 side relative to the stretcher 21, the girder 11 is sent out to the straddling object 10 side. In this embodiment, the wire 24a and the wire clamp jack 25a are the delivery means.

  An end portion (hereinafter referred to as a distal end portion 21b) opposite to the straddling object 10 side of the telescopic handrail 21 is an upper portion of the bridge pier 12c and is coupled to the connecting member 26c (see FIG. 10) by bolting or the like. By operating the wire clamp jack 25a after the coupling, the girder 11 and the telescopic handbill 21 extend with the tip 21b fixed. FIG. 10 shows a state where the ninth stage work has been completed.

[10th stage]
After the ninth stage work is completed, the girders 11 are further sent out. Along with this, the telescopic hand-roller 21 also expands. FIG. 11 shows a state where the work of the tenth stage is completed.

[Stage 11]
After the work of the tenth stage is completed, when the rear end portion 21a of the telescopic handrail 21 reaches the upper part of the pier 12b, the connection between the front end portion 21b of the telescopic handwheel 21 and the connecting member 26c is released. The wire 24b (see FIG. 12) is coupled to the distal end portion 21b of the telescopic handbill 21, and the wire 24b is installed by the wire clamp jack 25a installed on the bridge pier 12b on the straddling object 10 side with respect to the telescopic handwheel 21. By pulling, the extender 21 is reduced. FIG. 12 shows a state where the work of the eleventh stage is completed.

[Stage 12]
After the work in the eleventh stage is completed, the telescopic handrail 21 is contracted to the minimum state. FIG. 13 shows a state where the work of the twelfth stage is completed.

[Stage 13]
After the work of the twelfth stage is completed, a wire 24c (see FIG. 14) is coupled to the rear end portion 21a of the telescopic handbill 21, and the wire 24c is closer to the straddling object 10 side than the telescopic handcuff 21. By pulling with the wire clamp jack 25b (refer FIG. 14) installed in the pier 12a, the girder 11 is sent out to the straddling target object 10 side. FIG. 14 shows a state where the 13th stage work is completed.

[Stage 14]
After the work of the 13th stage is completed, when the distal end portion 21b of the telescopic handrail 21 reaches the upper portion of the pier 12b, the connecting member 26b in which the distal end portion 21b of the telescopic handrail 21 is installed on the upper portion of the pier 12b. (Refer to FIG. 15). FIG. 15 shows a state where the 14th stage work has been completed.

[15th stage]
After the work of the 14th stage is completed, the work of the 14th stage is repeated from the 9th stage, so that the girder 11 straddles the upper side of the straddling object 10. FIG. 16 shows a state where the work of the fifteenth stage is completed.

[Stage 16]
After the work of the fifteenth stage is completed, the hand-roller 20 and the telescopic hand-roller 21 are disassembled and removed to complete the feeding of the girder 11. FIG. 17 shows a state where the 16th stage work is completed.

  According to the delivery method according to the present embodiment, since the girder 11 is assembled on the ground, the assembly accuracy of the girder 11 can be improved. Moreover, since the installation girder 52 and the vent 51 used in the conventional delivery method (see FIG. 18) are not required, even when the spanning object 10 is wide or the pier 12 is high. Equipment can be omitted and work efficiency can be improved, thereby reducing costs.

  In addition, a crane for ascending the girder 11 by using a large lifting device 16 that can be extended and contracted, a device vent 19 that supports the large lifting device 16, and a support vent 17 that supports the beams 11a and 11b. Since a heavy machine such as the car 23 is not required, the work can be performed even when the work space is small or the place where the structure already exists above the beam 11.

  In addition, by using the wires 24a, 24b, and 24c and the wire clamp jacks 25a and 25b that pull the wires 24a, 24b, and 24c, the wires 24a, 24b, and 24c are flexible even if the coupling positions are slightly different. Can be easily handled by guiding the wires 24a, 24b, and 24c, and the tension of the wires 24a, 24b, and 24c can be easily controlled because the wires 24 themselves are appropriately expanded and contracted by tension. It is easy to process by winding.

  The delivery method according to the present invention is effective when the width of the straddling object is wide and when the height of the pier is high.

It is a side view which shows the outline | summary of the delivery method which concerns on Example 1. FIG. It is a side view at the time of completion of the first stage of the delivery method according to the first embodiment. It is a side view at the time of the 2nd step completion of the delivery method concerning Example 1. FIG. It is a side view at the time of the completion | finish of the 3rd step of the delivery method concerning Example 1. FIG. It is a side view at the time of the completion | finish of the 4th step of the delivery method which concerns on Example 1. FIG. It is a side view at the time of completion of the fifth stage of the delivery method according to Embodiment 1. It is a side view at the time of completion of the 6th stage of the delivery method concerning Example 1. It is a side view at the time of the completion | finish of the 7th step of the delivery method which concerns on Example 1. FIG. It is a side view at the time of completion | finish of the 8th step of the delivery method which concerns on Example 1. FIG. It is a side view at the time of completion | finish of the 9th step of the delivery method concerning Example 1. FIG. It is a side view at the time of completion | finish of the 10th step of the delivery method which concerns on Example 1. FIG. It is a side view at the time of the 11th step completion of the delivery method concerning Example 1. It is a side view at the time of completion of the twelfth stage of the delivery method according to the first embodiment. It is a side view at the time of completion | finish of the 13th step of the delivery method which concerns on Example 1. FIG. It is a side view at the time of the 14th step completion of the sending-out method concerning Example 1. It is a side view at the time of completion | finish of the 15th step of the delivery method concerning Example 1. FIG. It is a side view at the time of the 16th step completion of the delivery method concerning Example 1. It is a side view of the conventional sending-out method.

Explanation of symbols

10 straddling object 11, 11a, 11b girder 12, 12a, 12b, 12c pier 13 feeding device 14 gantry 15 block 16 large lifting device 17, 17a, 17b support vent 18 vertical feeding device 19 device vent 20 extender 21 telescopic Hand extender 22 Connecting structure 23 Crane vehicles 24a, 24b, 24c Wires 25a, 25b Wire clamp jacks 26b, 26c Connecting material 27 Ground 28 Foundation 51 Vent 52 Installation girder 53 Dolly

Claims (4)

A method of three-dimensionally crossing a girder supported by a plurality of bridge piers above a straddling object,
Between the bridge piers that support the girder, between the bridge piers other than between the bridge piers sandwiching the straddling object is a first section, and between the piers adjacent to the opposite side of the straddling object side of the first section As the second section, the first section is assembled in the first section, the second section is assembled in the second section,
The first digit is raised by the raising means, sent to the straddling object side and placed on the pier,
The second girder is raised by the raising means, sent out to the straddling object side and placed on the pier,
Furthermore, the second girder is sent out, and the end of the second girder and the end of the first girder are brought into contact with each other to form a sending girder,
A delivery method characterized by feeding the delivery girder to the straddling object side by delivery means while supporting the load of the delivery girder by support means. The delivery method according to claim 1,
As the raising means, a large lifting device capable of extending and contracting in the vertical direction, a device vent for supporting the large lifting device, and a support vent for supporting the first and second girders are used. How to send out. In the delivery method according to claim 1 or 2,
As the delivery means, a wire and a wire clamp jack that pulls the wire are used. The delivery method according to any one of claims 1 to 3,
A feeding method characterized by using an extendable hand extender that can be installed at the end of the sending beam as the supporting means.

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