JP4477534B2 - Bridge extrusion erection equipment - Google Patents

Bridge extrusion erection equipment Download PDF

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Publication number
JP4477534B2
JP4477534B2 JP2005102261A JP2005102261A JP4477534B2 JP 4477534 B2 JP4477534 B2 JP 4477534B2 JP 2005102261 A JP2005102261 A JP 2005102261A JP 2005102261 A JP2005102261 A JP 2005102261A JP 4477534 B2 JP4477534 B2 JP 4477534B2
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Prior art keywords
extrusion
control
jack
main girder
vibration
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JP2006283323A (en
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清義 市川
俊夫 横山
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オリエンタル白石株式会社
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Description

  The present invention relates to a bridge extrusion installation device for installing a main girder of a bridge by an extrusion method.

  When constructing the main girder of the bridge, the extrusion method has been frequently used conventionally. This extrusion method is a method of erection of a bridge by sequentially extruding a main girder divided into blocks having a length of 10 to 20 m on a main girder production yard installed on land or the like behind a pier. Conventionally, many extrusion apparatuses for constructing a bridge based on such an extrusion method have been proposed (for example, Patent Documents 1 and 2). This extrusion method is advantageous in terms of quality control and process control, and can significantly reduce the cost of the entire construction work.

  FIG. 4 shows an example of an extrusion apparatus disclosed in the prior art. As shown in FIG. 4, the main girder 23 is installed on the upper end surface of the support member 22 that slides on the sliding plate 21 by the expansion and contraction operation of the horizontal jack 20 and the vertical jack 24. Then, the main girder 23 is pushed out by pulling the support member 22 with the horizontal jack 20.

In this extruding method, an extruding device having an overrun prevention function for removing so-called “smudge” has also been proposed so that the main girder does not slide out unreasonably when pushing out the main girder on a downward slope (for example, , See Patent Document 3).
JP-A-57-193605 JP-A-6-212607 JP-A-9-125320

  Further, the above-mentioned patent document discloses a technique for more safely erection while controlling the extrusion of the main girder even in a downward slope, while laying a bridge with a steeper slope, or No technology has been disclosed that makes it possible to push out the main girder reliably while making such safety stronger in the event of an unexpected earthquake or the like.

  In particular, when a main girder with a greater weight is installed in a steep part, the main girder cannot be controlled efficiently due to the inertial force due to the weight, and an earthquake or the like occurred during the extrusion operation. In such a case, the main girder itself slides out, which increases the risk.

  Therefore, the present invention has been devised in view of the above-described problems, and the object of the present invention is to be expected in the case where the main girder of a bridge having a greater weight is bridged based on the extrusion method. It is an object of the present invention to provide a bridge extrusion installation device that can prevent overrunning due to the start of an earthquake even when an earthquake does not occur and can improve the safety of the entire construction.

  In order to solve the above-described problem, an extrusion erection device according to the present invention is an extrusion erection device for piercing a main girder of a bridge by an extrusion method. A bracket attached to the bottom surface of the main girder, a hydraulic jack that expands and contracts a tensile steel member whose one end is coupled to the bracket according to a hydraulic state, a control means for controlling the hydraulic state in the hydraulic jack, and an external And a vibration detection means for notifying the control means of information relating to the detected vibration, and the control means performs the control based on the information notified from the vibration detection means. .

  In addition to the above-described configuration, the extrusion erection apparatus according to the present invention further includes an extrusion control means for controlling the pushing operation of the main beam in the extrusion mechanism, and the extrusion control means is notified from the vibration detection means. Based on the information, the extrusion operation by the extrusion mechanism is stopped, and the control means performs the control after a lapse of a certain time from the stop of the extrusion operation by the extrusion mechanism.

  When the main girder is pushed out, a load in the direction opposite to the girder pushing direction is applied by the hydraulic jack. At this time, the expansion / contraction amount of the tensile steel material by the hydraulic jack is controlled by the control means. Therefore, even when a main girder having a large weight is installed at a steep portion, it is possible to prevent the main girder from overrunning. Further, even when an earthquake occurs during the extrusion erection, it is possible to prevent the main girder from overrunning.

  Hereinafter, as a best mode for carrying out the present invention, an extrusion construction apparatus for a bridge that is bridged based on an extrusion method will be described in detail with reference to the drawings.

  FIG. 1 is a diagram showing a configuration of an extrusion erection apparatus 1 for erection of a main girder 2 of this bridge by extruding it in the direction of girder extrusion in the figure. The extrusion erection device 1 includes a slide gantry 5 and a vertical jack 6 that are respectively placed on the pier 3, and an overrun prevention jack 7 that is placed on the pier 4, and the overrun prevention jack 7. A tension steel member 9 which is arranged so as to be stretchable, a bracket 8 coupled to one end of the tension steel member 9, a hydraulic pump 10 for supplying hydraulic pressure to the overrun prevention jack 7, and a hydraulic pump 10 A control unit 11 to be connected and a vibration detection unit 12 connected to the control unit 11 are provided.

  The slide frame 5 is fixed to a sliding plate 51, a slide jack 52 provided on the sliding plate 51 so as to be slidable in the direction of pushing out the girder in the figure, and an end of the sliding plate 51 in the direction of pushing out the girder. And a horizontal jack 53 that slides the slide jack 52 by an expansion and contraction action.

  The vertical jack 6 has a contact surface 6a that can temporarily support the bottom surface of the main girder 2, and is configured to be extendable in the vertical direction in accordance with a hydraulic state controlled by a control unit (not shown).

  The bracket 8 causes the tensile steel material 9 to protrude in the girder pushing direction through a hole (not shown) formed in the plate 81 at one end, and the end of the protruding tensile steel material 9 is fixed with a nut 82. Since the tension steel material 9 has a screw portion (not shown) that can be screwed onto the nut 82 on the surface thereof, the nut 82 is firmly fixed to the bracket 8 by tightening the nut 82 into the tension steel material 9. It is possible to As shown in FIG. 2, the bracket 8 is firmly fixed to the bottom surface of the main girder 2 via bolts 83 and nuts 84. Therefore, since the tensile steel material 9 extending from the bracket 8 is indirectly and firmly fixed to the main girder 2, the tensile steel material 9 is directed to the tensile steel material 9 in a direction opposite to the direction in which the girder is pushed out as described later. By applying a tensile load, it is possible to suppress the slip of the main beam 2.

  The overrun prevention jack 7 incorporates a piston in a cylinder, and the internal hydraulic state is controlled via a hose 71 connected to the hydraulic pump 10. The overrun prevention jack 7 is capable of expanding and contracting the inserted tensile steel material 9 in the girder pushing direction by controlling the internal hydraulic state.

  The hydraulic pump 10 increases or decreases the hydraulic pressure in the overrun prevention jack 7 through the hose 71 under the control of the control unit 11.

  The vibration detection unit 12 detects vibration transmitted to the extrusion erection device 1. Any known technique may be applied to the vibration detection unit 12 as long as it is a means for detecting vibration. For example, a pendulum or the like may be used. The vibration detection unit 12 notifies the control unit 11 of information regarding the detected vibration. As a result, the control unit 11 can also control the hydraulic pump 10 based on the information notified from the vibration detection unit 12.

  Next, operation | movement of the extrusion erection apparatus 1 to which this invention is applied is demonstrated using FIG. First, as shown in FIG. 3A, the vertical jack 6 is pushed down, and the slide jack 52 in the slide frame 5 is pushed up and brought into contact with the bottom surface of the main girder 2. Then, the slide jack 52 abutted against the bottom surface of the main girder 2 is slid in the girder pushing direction in the figure by the horizontal jack 53. Thereby, it becomes possible to extrude the main girder 2 in the girder pushing direction.

  After sliding the slide jack 52 over a certain distance, the vertical jack 6 is pushed up in the vertical direction as shown in FIG. As a result, the contact surface 6 a of the vertical jack 6 can temporarily support the bottom surface of the main girder 2. Accordingly, the upper surface of the slide jack 52 is gradually separated from the bottom surface of the main girder 2.

  Next, as shown in FIG. 3 (c), the horizontal jack 53 slides the slide jack 52 in contact with the bottom surface of the main girder 2 in the direction opposite to the pushing direction of the girder in the figure. As a result, the slide jack 52 returns to the right end portion of the sliding plate 51. Next, the vertical jack 6 is pushed down, and the above-described operations shown in FIG.

  As a result, the main girder 2 is sequentially pushed out in the girder pushing direction, and the bridge erection can be completed. Incidentally, when the main girder 2 is pushed out, a load in the direction opposite to the direction of pushing out the girder is applied to the main girder 2 by the overrun prevention jack 7. At this time, the extension / contraction amount of the tensile steel material 9 by the overrun prevention jack 7 is actually controlled by the control unit 11 via the hydraulic pump 10. Therefore, even when the main girder 2 having a large weight is erected at a steep location, it is possible to prevent the main girder 2 from overrunning.

  Moreover, the extrusion installation apparatus 1 to which the present invention is applied can prevent the main girder 2 from overrunning even when an earthquake occurs during the extrusion installation.

  When the vibration detection unit 12 detects a vibration due to an earthquake, the vibration detection unit 12 notifies the control unit 11 of information based on the detection. The control unit 11 identifies the magnitude of the detected vibration based on the information notified from the vibration detection unit 12. Further, the control unit 11 determines whether or not an earthquake has occurred based on the identified magnitude of vibration. When actually making this determination, the magnitude of the vibration based on the vibration caused by the earthquake is set in advance as a threshold, and if the detected magnitude of vibration exceeds the threshold, it is determined that an earthquake has occurred. It may be. Since the magnitude of the vibration caused by the earthquake changes depending on the seismic intensity, the threshold value to be set may be set according to each seismic intensity.

  When it is determined that an earthquake has occurred, the control unit 11 controls the hydraulic state of the overrun prevention jack 7 via the hydraulic pump 10. At this time, a load may be applied to the main girder 2 in the direction opposite to the direction of pushing out the girder by pulling the tensile steel material 9 in the direction opposite to the direction of pushing out the girder. As a result, it is possible to prevent the main girder 2 having a large weight from slipping out in the direction of pushing out the girder due to the earthquake.

  Incidentally, you may make it the control part 11 adjust the tension amount of this tension steel material 9 according to the magnitude | size of the identified vibration. Thereby, according to the seismic intensity of the earthquake which occurred, it becomes possible to control the load of the opposite direction to the pushing direction of the girder loaded on the main girder 2 and to further improve the safety of the whole construction.

  The present invention is not limited to the embodiment described above. For example, as shown in FIG. 5, the extrusion erection apparatus 101 that can output information related to vibration detected by the vibration detection unit 12 not only to the control unit 11 described above but also to the control unit 31 that controls the slide frame 5. It is applicable to. In this extrusion erection apparatus 101, the same components and members as those of the extrusion erection apparatus 1 described above are denoted by the same reference numerals, and description thereof is omitted here.

  The hydraulic pump 30 raises or lowers the hydraulic pressure in the slide jack 52 via the hose 32 under the control of the control unit 31.

  When the vibration detection unit 12 detects vibration due to an earthquake, the vibration detection unit 12 notifies the control unit 11 and the control unit 31 of information based on the detection. The control unit 31 identifies the magnitude of the detected vibration based on the information notified from the vibration detection unit 12. Further, the control unit 31 determines whether or not an earthquake has occurred based on the identified magnitude of vibration.

  When it is determined that an earthquake has occurred, the control unit 31 controls the hydraulic state of the slide jack 52 via the hydraulic pump 30 to stop the pushing operation of the main girder 2 by the slide jack 52. In addition, the control unit 11 may be configured to load the main girder 2 by pulling the tensile steel material 9 in a direction opposite to the direction of pushing out the girder 2 after a lapse of several seconds from the stop of the slide jack 52 by the control unit 31. Good.

  That is, when vibration is detected by the vibration detection unit 12, overrun prevention is performed when the operation of the overrun prevention jack 7 based on the control unit 11 and the stop of the slide jack 52 based on the control unit 31 are executed simultaneously. When a large load is applied to the jack 7, the main girder 2 is damaged. On the other hand, in the present invention, the slide jack 52 is first stopped and the overrun prevention jack 7 is controlled after a few seconds (for example, after 2 seconds), so that the load applied to the overrun prevention jack is reduced. As a result, it is possible to suppress damage to the main beam 2.

It is a figure shown about the structure of the extrusion erection apparatus to which this invention is applied. It is a perspective view of a bracket. It is a figure for demonstrating about operation | movement of the extrusion erection apparatus to which this invention is applied. It is a figure for demonstrating per prior art. It is a figure shown about another structure of the extrusion erection apparatus to which this invention is applied.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Extrusion installation apparatus 2 Main girder 3 Bridge pier 5 Slide mount frame 6 Jack 7 Overrun prevention jack 8 Bracket 9 Tensile steel 10 Hydraulic pump 11 Control part 12 Vibration detection part 30 Hydraulic pump 31 Control part 51 Sliding plate 52 Slide jack 71 Hose

Claims (2)

  1. In the bridge erection device for erection of the main girder of the bridge by the extrusion method,
    An extrusion mechanism for extruding the main beam toward the extrusion direction;
    A bracket attached to the bottom of the main girder,
    A hydraulic jack that expands and contracts a tensile steel material having one end coupled to the bracket according to a hydraulic state;
    Control means for controlling the hydraulic state in the hydraulic jack;
    A vibration detecting means for detecting vibration transmitted from the outside and notifying the control means of information relating to the detected vibration;
    The above-mentioned control means performs the above-mentioned control based on the information notified from the above-mentioned vibration detection means.
  2. Further comprising extrusion control means for controlling the extrusion operation of the main beam in the extrusion mechanism,
    The extrusion control unit stops the extrusion operation by the extrusion mechanism based on the information notified from the vibration detection unit,
    The bridge erection apparatus according to claim 1, wherein the control means performs the control after a lapse of a certain time from the stop of the extrusion operation by the extrusion mechanism.
JP2005102261A 2005-03-31 2005-03-31 Bridge extrusion erection equipment Expired - Fee Related JP4477534B2 (en)

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JP2005102261A JP4477534B2 (en) 2005-03-31 2005-03-31 Bridge extrusion erection equipment

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JP2005102261A JP4477534B2 (en) 2005-03-31 2005-03-31 Bridge extrusion erection equipment

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JP4477534B2 true JP4477534B2 (en) 2010-06-09

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101929129A (en) * 2010-09-06 2010-12-29 中铁大桥局集团有限公司 Novel slipway beam for incremental launching construction
CN101935987A (en) * 2010-08-27 2011-01-05 中交一公局桥隧工程有限公司 Construction method for integrally sliding large-span steel pipe arch of curved bridge

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100819432B1 (en) 2007-10-09 2008-04-04 조재성 The hydraulic jack appartus for launching og bridge construction
KR100986478B1 (en) 2008-05-21 2010-10-08 박윤수 Self-launching apparatus for moving girders forwardly for incremental launching method
KR101114022B1 (en) * 2009-08-19 2012-02-27 박정일 equipment for transporting massive body
CN102720143B (en) * 2012-06-30 2014-07-30 中铁二十三局集团有限公司 Guide beam and installation and disassembly method thereof
CN103541308B (en) * 2013-11-01 2015-04-15 鞍山东方钢构桥梁有限公司 Variable cross-section cantilever bridge box girder self-locking synchronization pushing system and construction method
CN103911955B (en) * 2014-04-14 2016-01-13 上海市机械施工集团有限公司 For hydraulic support device and the using method thereof of large-span steel construction
CN105369742B (en) * 2015-10-14 2016-11-30 天津城建大学 It is applicable to the rolling bearing unified with permanent bearing of incremental launching method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101935987A (en) * 2010-08-27 2011-01-05 中交一公局桥隧工程有限公司 Construction method for integrally sliding large-span steel pipe arch of curved bridge
CN101935987B (en) * 2010-08-27 2012-07-25 中交第一公路工程局有限公司 Construction method for integrally sliding large-span steel pipe arch of curved bridge
CN101929129A (en) * 2010-09-06 2010-12-29 中铁大桥局集团有限公司 Novel slipway beam for incremental launching construction

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