JP2011074604A - Bridge movement restraining apparatus and movement restraining method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a movement restraining apparatus which is installed easily while preventing the lift of a bridge girder, and is applied not only to a new bridge but also to an existing bridge, and to provide a movement restraining method. <P>SOLUTION: The movement restraining apparatus applied to the bridge 1 with the bridge girder 2 placed on a support base 3, to prevent the deviation of the bridge girder 2, includes a cable 23 having one end 21 and the other end 22; a first anchor part 24 fixed to a surface 15a other than a facing surface, facing the bridge girder 2, of the support base 3 to anchor the one end 21 of the cable 23; and a second anchor part 25 fixed to the surface 15a other than the facing surface, facing the bridge girder 2, of the support base 3 to anchor the other end 22 of the cable 23. The cable 23 is inserted through a through-hole 14 formed in the bridge girder 2 in a position between the first anchor part 24 and second anchor part 25 and in a position higher than the first anchor part 24 and second anchor part 25. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a movement suppressing device and a movement suppressing method for preventing a bridge girder from deviating from a pier or an abutment.

  Conventionally, for example, a device shown in FIG. 8 is known as a movement restraining device that prevents a bridge girder from deviating from a pier or an abutment. The movement restraint device of FIG. 8 is fixed to the cable 100 and the bridge girder 200, and is fixed to the bridge girder side fixing unit 110 that fixes one end of the cable 100, and the pier side that is fixed to the bridge pier 300 and fixes the other end of the cable 100. A fixing unit 120. The movement restraining device fixes one end of the cable 100 to the bridge girder 200 side and fixes the other end to the bridge pier 300 side, thereby preventing the bridge girder from deviating from the lifting force that lifts the bridge girder 200 from the pier 300. It is preventing.

  Moreover, as a movement suppression apparatus, the thing of the patent document 1 and the patent document 2 is known in addition to what is shown in FIG. The movement suppressing device of Patent Document 1 includes a cable, a first fixing unit fixed to the bridge girder and fixing one end of the cable, a second fixing unit fixed to the bridge girder and fixing the other end of the cable, The saddle is fixed to the bridge pier between the first fixing portion and the second fixing portion, and includes a saddle on which the cable is hooked. According to this movement restraining device, the cable is hooked on the saddle, and one end and the other end of the cable are fixed to the bridge girder via the first fixing unit and the second fixing unit. Even when the lifting force is applied, the bridge girder is lifted with respect to the pier, and the bridge girder is prevented from escaping.

  The movement restraint device of Patent Document 2 has a curved through-hole formed in the end cross beam (bridge girder) so as to open to the ridge wall side of the abutment and to the chest wall side of the abutment, and to the through-hole. The inserted cable, the first fixing portion provided on the collar wall portion and fixing one end portion of the cable inserted through the through hole, and the other end portion of the cable provided on the chest wall portion and inserted through the through hole And a second fixing unit for fixing. According to this movement restraint device, since the eaves wall and the end cross beam are connected by the cable, even if the lifting force acts on the end cross beam, the reaction force of the eaves wall portion where the one end of the cable is fixed This prevents the end cross beam from being lifted from the wall. Thereby, the deviation of the end cross beam is prevented.

JP 2006-291536 A JP 2004-92269 A

  In the movement suppressing device shown in FIG. 8, it is necessary to fix the bridge girder fixing part 110 to the bridge girder in order to fix one end of the cable 100 to the bridge girder 200 side. The bridge girder fixing part 110 is fixed to the bridge girder 200 using, for example, a large number of anchor bolts 130. In that case, since it is necessary to drill a bolt hole of a predetermined length in the bridge girder, in particular, when the bridge 1A to which the movement suppressing device is applied is an existing one, a reinforcing bar extending inside the bridge girder 200, It is difficult to drill a plurality of bolt holes while avoiding PC steel. As described above, in the movement suppressing device shown in FIG. 8, it is difficult to install the bridge girder-side fixing unit 110.

  Since the movement suppression device of Patent Document 1 also needs to fix the first fixing portion to the bridge girder in order to fix one end of the cable to the bridge girder side, the first fixing is performed for the same reason as the movement suppression device shown in FIG. There are difficulties in installing the department.

  In the movement suppressing device of Patent Document 2, the first fixing unit and the second fixing unit are provided not on the end cross beam (bridge girder) but on the heel wall portion and the chest wall portion of the abutment. 2 Because of the installation of the fixing unit, unlike the movement suppression device shown in FIG. 8 or the movement suppression device of Patent Document 1, it is not necessary to drill bolt holes such as anchor bolts in the end cross beams. However, the application of the movement restraint device of Patent Document 2 is limited to a newly installed bridge.

  Specifically, the movement restraining device of Patent Document 2 is configured such that the first fixing unit is connected to the side wall part in order to prevent the end cross girder placed on the side wall part from being lifted from the side wall part. It is provided in the portion facing the end cross beam on the upper surface. Therefore, it is necessary to provide the first fixing unit on the upper surface before placing the end cross beam on the upper surface of the wall portion. In other words, since the first fixing unit cannot be provided on the upper surface of the wall portion on which the end cross beam is already placed, the movement suppressing device of Patent Document 2 cannot be applied to an existing bridge. Application is limited to new bridges.

  Therefore, in view of the above circumstances, the present invention provides a movement suppression device and a movement suppression method that are easy to install while preventing the bridge girder from rising, and that can be applied not only to a newly installed bridge but also to an existing bridge. For the purpose.

  In order to achieve the above object, a bridge movement suppressing device according to the present invention is a movement suppressing device that is applied to a bridge in which a bridge girder is placed on a support base to prevent the bridge girder from deviating. A cable having the other end portion, a first fixing portion fixed to a surface other than the facing surface facing the bridge girder in the support base, and facing the bridge girder in the support base, and a first fixing portion fixing the one end portion of the cable. A second fixing unit fixed to a surface other than the opposing surface and fixing the other end of the cable, wherein the cable is positioned between the first fixing unit and the second fixing unit, and The first fixing unit and the second fixing unit are inserted through a through hole formed in the bridge girder at a position higher than the first fixing unit and the second fixing unit.

  The bridge movement suppression method according to the present invention is a movement suppression method applied to a bridge in which a bridge girder is placed on a support stand to prevent the bridge girder from deviating, and includes a cable having one end and another end. A first fixing step for fixing the first fixing portion to a surface other than the facing surface facing the bridge beam in the support table; and a surface other than the facing surface facing the bridge beam in the support table. A second fixing step for fixing the second fixing unit; and the bridge beam at a position between the first fixing unit and the second fixing unit and at a position higher than the first fixing unit and the second fixing unit. A through hole forming step of forming a through hole in the cable, a cable insertion step of inserting a cable through the through hole, a first fixing step of fixing the one end of the cable to the first fixing unit, and the cable of the cable The other end The and a second fixing step of fixing the second fixing section.

  According to the bridge movement restraint device and the movement restraint method according to the present invention, the through hole through which the cable is inserted has a first fixing portion that fixes one end of the cable and a second fixing portion that fixes the other end of the cable. Therefore, each of the one end portion and the other end portion of the cable is fixed at a predetermined angle with respect to the horizontal direction. As a result, the bridge girder is prevented from being lifted from the support base even when an upward lifting force that causes the bridge girder to be lifted from the support base is restricted. As a result, deviation of the bridge girder from the support base is prevented.

  Further, according to the movement suppressing device and the movement suppressing method according to the present invention, the first fixing portion that fixes one end of the cable and the second fixing portion that fixes the other end of the cable are not on the bridge girder but on the support base. Since it is fixed, it is easier to install the first fixing unit and the second fixing unit than the conventional configuration in which the fixing unit is fixed to the bridge girder while avoiding the reinforcing bars and PC steel materials extending inside the bridge girder. . The process of forming a through hole in the bridge girder so that the cable can be inserted is easier than the process of fixing the fixing portion to the bridge girder.

  Furthermore, according to the movement suppressing device and the movement suppressing method according to the present invention, the first fixing unit and the second fixing unit are fixed to a surface other than the facing surface facing the bridge beam in the support base, so the first fixing unit. The second fixing unit can be fixed to the support table even before the bridge girder is placed on the support table or after the bridge girder is placed on the support table. Therefore, the movement suppressing device according to the present invention can be applied not only to a newly installed bridge but also to an existing bridge.

  As described above, the movement suppressing device and the movement suppressing method according to the present invention are easy to install the first fixing unit and the second fixing unit while preventing the bridge girder from being lifted, and are not limited to the newly installed bridges. It can also be applied to bridges.

  In a preferred embodiment of the present invention, the bridge girder has a plurality of adjacent bridge girder portions, and the through hole has a plurality of through hole portions formed in each of the plurality of bridge girder portions. The first fixing portion fixes the one end portion of the cable protruding from the through hole portion in one end of the plurality of bridge girders, and the second fixing portion is the other The other end portion of the cable protruding from the through hole in the bridge girder at the end of the cable is fixed.

  According to this configuration, even when the bridge girder has a plurality of adjacent bridge girder portions, the first fixing portion fixes one end portion of the cable protruding from the through hole portion in the bridge girder portion at one end. At the same time, since the second fixing portion fixes the other end portion of the cable protruding from the through hole portion in the bridge girder portion at the other end, the plurality of bridge girder portions are restricted from moving upward. This prevents the bridge girder portion from being lifted from the support base even when a lifting force is applied to lift the bridge girder portion from the support base. As a result, deviation of the bridge girder from the support base is prevented.

  In another preferred embodiment of the present invention, the plurality of bridge girders include a first bridge girder and a second bridge girder located next to the first bridge girder, and the support base is adjacent to the first bridge girder. A stopper member is provided so as to be positioned between the matching first bridge girder portion and the second bridge girder portion, and the stopper member regulates horizontal displacement of the first bridge girder portion and the second bridge girder portion. It is configured as follows.

  According to this configuration, the stopper member is provided between the first bridge girder portion and the second bridge girder portion even if an external force is applied to displace the first bridge girder portion and the second bridge girder portion in the horizontal direction. Therefore, the horizontal relative displacement of the first bridge girder and the second bridge girder is restricted. Thereby, the deviation from the support stand of a 1st bridge girder part and a 2nd bridge girder part is prevented.

  In still another preferred embodiment of the present invention, the stopper member has a first side wall and a second side wall facing each other between the first bridge girder part and the second bridge girder part, and the first side wall and the second side wall. Each of the side walls is provided with an impact mitigating member capable of mitigating an impact when colliding with the first bridge girder or the second bridge girder.

  According to this configuration, since the impact relaxation member is provided on each of the first side wall and the second side wall of the stopper member, the first bridge girder part or the second bridge girder part is first when it collides with the stopper member. Damage to the bridge girder part or the second bridge girder part can be suppressed.

  In still another preferred embodiment of the present invention, the plurality of bridge girders include a first bridge girder and a second bridge girder located next to the first bridge girder, and the support base includes An intermediate holding part is provided so as to be positioned between the adjacent first and second bridge girder parts, and the intermediate holding part may hold the cable at a position lower than the through-hole part. It is configured to be possible.

  According to this configuration, since the intermediate holding part holds the cable at a position lower than the through-hole parts on both sides thereof, the cable is in the horizontal direction between the adjacent first bridge girder part and second bridge girder part. It can extend at a predetermined angle. Therefore, the first bridge girder part and the second bridge girder part are restricted from being displaced upward by the intermediate holding part. Therefore, the bridge girder can be prevented from being lifted not only by the first fixing unit and the second fixing unit, but also by the intermediate holding unit. Therefore, the lifting force for lifting the bridge girder from the support base is increased by the first fixing unit, 2 The load can be distributed and fixed to the fixing unit and the intermediate holding unit. As a result, a large lifting force can be regulated even with a relatively small-capacity cable.

  In still another preferred embodiment of the present invention, the intermediate holding part is configured to restrict displacement of the first bridge girder part and the second bridge girder part in the horizontal direction.

  According to this configuration, even when an external force that attempts to displace the first bridge girder and the second bridge girder in the horizontal direction is applied, the relative displacement in the horizontal direction of the first bridge girder and the second bridge girder by the intermediate holding portion. Is regulated. Thereby, the deviation from the support stand of a 1st bridge girder part and a 2nd bridge girder part is prevented. As described above, in the movement suppressing device according to the present invention, the intermediate holding part regulates the lifting of the bridge girder part and regulates the displacement of the bridge girder part in the width direction.

  In still another preferred embodiment of the present invention, the intermediate holding part has a first side wall and a second side wall that face each other between the first bridge girder part and the second bridge girder part, and the first side wall and the first side wall Each of the two side walls is provided with an impact mitigating member capable of mitigating an impact when colliding with the first bridge girder or the second bridge girder.

  According to this configuration, since the impact relaxation member is provided on each of the first side wall and the second side wall of the intermediate holding part, when the first bridge girder part or the second bridge girder part collides with the intermediate holding part. Damage to the first bridge girder or the second bridge girder can be suppressed.

  In still another preferred embodiment of the present invention, the opening of the through hole is provided with a buffer member having an inner surface that curves downward.

  The opening of the through hole is a portion where the load from the cable is concentrated when the upward displacement of the bridge girder is restricted, but according to the above configuration, the opening has an inner surface that curves downward. Since the buffer member which has is provided, while relaxing the bending stress of a cable, the said load can be disperse | distributed. Thereby, the damage to the cable resulting from a contact with the opening part of a through-hole and the bending in an opening part is suppressed.

  In still another preferred embodiment of the present invention, the lower surface of the opening of the through hole is curved downward.

  The opening of the through hole is a portion where the load from the cable is concentrated when the upward displacement of the bridge girder is restricted, but according to the above configuration, the lower surface of the opening is curved downward. Therefore, the bending stress of the cable can be eased and the load can be dispersed. Thereby, the damage to the cable resulting from a contact with the opening part of a through-hole and the bending in an opening part is suppressed.

  In still another preferred embodiment of the present invention, when the bridge girder has an end cross girder extending in the width direction of the bridge girder, the through hole extends in the bridge axis direction orthogonal to the width direction. The first fixing unit is fixed to a surface other than the facing surface of the support base facing the end cross beam, and fixes one end of the cable. The second fixing unit Is fixed to a surface other than the facing surface that faces the end cross beam of the support base, and fixes the other end of the cable.

  According to this configuration, since the end cross girder is restricted from being displaced upward by the cable extending in the direction of the bridge axis of the bridge girder, an uplift force is applied to lift the end cross girder from the support base. However, it is possible to prevent the end cross beam from being lifted from the support base. As a result, deviation of the bridge girder from the support base is prevented.

  In still another preferred embodiment of the present invention, when the bridge girder has a plurality of adjacent bridge girder portions, in the through hole forming step, a plurality of through hole portions are formed in each of the plurality of bridge girder portions, In the cable insertion step, the cable is inserted into the plurality of through holes, and in the first fixing step, the cable protruding from the through hole in the bridge girder at one end of the plurality of bridge girders. The one end portion is fixed to the first fixing portion, and in the second fixing step, the other end portion of the cable protruding from the through hole portion in the bridge girder portion at the other end is fixed to the second fixing portion. .

  In still another preferred embodiment of the present invention, the plurality of bridge girders include a first bridge girder and a second bridge girder located next to the first bridge girder. A stopper member is provided on the support base so as to be positioned between the first bridge girder portion and the second bridge girder portion and to restrict displacement of the first bridge girder portion and the second bridge girder portion in the horizontal direction.

  In still another preferred embodiment of the present invention, the plurality of bridge girders include a first bridge girder and a second bridge girder located next to the first bridge girder. An intermediate holding part installation step is further provided in which an intermediate holding part is provided on the support base so as to be positioned between the first bridge girder part and the second bridge girder part and to hold the cable at a position lower than the through-hole part. Is called.

  In still another preferred embodiment of the present invention, when the bridge girder has an end cross girder extending in the width direction of the bridge girder, the through-hole forming step extends in a bridge axis direction orthogonal to the width direction of the bridge girder. In the first fixing step, the first fixing portion is fixed to a surface other than the facing surface facing the end cross beam in the support base, In the 2 fixing step, the second fixing unit is fixed to a surface other than the facing surface facing the end cross beam in the support base.

  According to the movement suppressing device and the movement suppressing method according to the present invention, the first fixing unit and the second fixing unit can be easily installed while preventing the bridge girder from being lifted. It can also be applied to bridges.

It is a figure which shows the state which applied the movement suppression apparatus which concerns on 1st Embodiment of this invention to a bridge. It is a figure which shows the state which applied the movement suppression apparatus which concerns on 1st Embodiment of this invention to a bridge. It is a figure which shows the state which applied the movement suppression apparatus which concerns on 2nd Embodiment of this invention to a bridge. FIG. 4 is a partially enlarged view of FIG. 3. When two cables are extended in the width direction of a bridge girder, it is a figure which shows the state which penetrated those cables together in the insertion hole of the intermediate | middle holding | maintenance part. It is a figure which shows the structure which fixed the 1st fixing | fixed part to the side surface of the pier. FIG. 10 is a diagram illustrating another configuration of the first fixing unit. It is a figure which shows the conventional movement suppression apparatus.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

(First embodiment)
First, the movement suppressing device according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2. 1 and 2 are views showing a state in which the movement suppressing device according to the first embodiment is applied to the bridge 1. A bridge 1 shown in FIG. 1 includes a bridge girder 2, a bridge pier (support base) 3 that supports one end of the bridge girder 2 in the bridge axis direction (longitudinal direction), and a bridge girder 2 spaced apart from the pier in the bridge axis direction of the bridge girder 2. And an abutment (support base) 4 that supports the other end of the main body.

  As shown in FIG. 2, the bridge girder 2 includes a first side portion 7 and a second side portion 8 that face each other in the width direction orthogonal to the bridge axis direction of the bridge girder 2, and the bridge side direction in the first side portion 7. An upper connecting portion 9 for connecting the extending upper edge and the upper edge extending in the bridge axis direction on the second side portion 8, the lower edge extending in the bridge axis direction on the first side portion 7 and the bridge axis direction on the second side portion 8 It is the box girder which has the lower side connection part 10 which connects with the lower edge extended in the. An internal space 11 defined by the first side portion 7, the second side portion 8, the upper connection portion 9, and the lower connection portion 10 is formed inside the bridge girder 2.

  Further, the first side portion 7 of the bridge girder 2 is formed with a first through portion 12 which is a hole extending in the horizontal direction and the width direction from the outer surface 7a to the inner surface 7b, and the second side portion 8 also has an inner surface from the outer surface 8a. A second penetrating portion 13 is formed as a hole extending in the horizontal direction and in the width direction over 8b. The first penetrating part 12 and the second penetrating part 13 are set at substantially the same height position, and the first penetrating part 12, the second penetrating part 13 and the internal space 11 constitute a through hole 14. Yes. When the bridge girder 2 is a solid structure having no internal space, the through-hole 14 extends from one hole extending in the horizontal direction from the outer surface 7a of the first side portion 7 to the outer surface 8a of the second side portion 8. Composed.

  The pier 3 includes an upper surface 15 that is a horizontal surface and faces upward, and a pair of side surfaces 16 that face each other in the width direction of the bridge girder 2. The upper surface 15 of the bridge pier 3 is a support surface that supports the bridge girder 2, and a plurality of support portions 17 are provided in the width direction of the bridge girder 2. One end of the bridge girder 2 is supported by the pier 3 by the lower connecting portion 10 being supported on the support surface 15 via the support portion 17. In a state where the lower connecting portion 10 is supported on the support surface 15 via the support portion 17, the lower surface 10 a of the lower connecting portion 10 has a slight gap formed between the lower surface 10 a and the supporting surface 15. Via the support surface 15. In FIG. 1, one end portion of another bridge girder 2 adjacent in the bridge axis direction is also supported by the pier 3 by the lower connecting portion 10 being supported on the support surface 15 via the support portion 17.

  The abutment 4 has a support surface 18 provided with a plurality of support portions 17 in the width direction of the bridge girder 2 and a vertical surface 19 extending from the support surface 18 in a substantially vertical direction. The other end portion of the bridge girder 2 is supported by the pier 3 by the lower connecting portion 10 being supported on the support surface 18 via the support portion 17. In a state where the lower connecting portion 10 is supported on the support surface 18 via the support portion 17, the lower surface 10 a of the lower connecting portion 10 has a slight gap formed between the lower surface 10 a and the support surface 15. It is opposed to the support surface 18. The end surface 20 in the bridge axis direction at the other end of the bridge girder 2 faces the vertical surface 19 of the abutment 4 with a slight gap.

  In the bridge 1 having the above structure, the movement suppressing device according to the first embodiment prevents one end of the bridge girder 2 from deviating from the pier 3 and prevents the other end of the bridge girder 2 from deviating from the abutment 4. Therefore, it is installed on both the pier 3 side and the abutment 4 side. In addition, since the movement suppression apparatus installed in the pier 3 side and the movement suppression apparatus installed in the abutment 4 side have the same structure, in this specification, the movement installed in the pier 3 side. Only the suppression device will be described.

  As shown in FIG. 2, the movement suppressing device is fixed to the cable 23 having one end 21 and the other end 22 and the support surface 15 of the bridge pier 3, and fixes the one end 21 of the cable 23. And a second fixing portion 25 that is fixed to the support surface 15 of the pier 3 and fixes the other end portion 22 of the cable 23.

  The cable 23 is inserted into the through hole 14 of the bridge girder 2. Specifically, the cable 23 has one end portion 21 projecting from the first through portion 12 toward the outer surface 7a of the first side portion 7 and the other end portion 22 extending from the second through portion 13 to the second side portion. 8 is inserted through the through hole 14 so as to protrude to the outer surface 8a side. Therefore, the cable 23 extends in the horizontal direction and in the width direction of the bridge girder 2 through the first penetration part 12, the internal space 11, and the second penetration part 13.

  Examples of the tension material constituting the cable 23 include steel wires such as PC steel wire, PC steel strand, galvanized steel wire, galvanized PC steel strand, and stainless steel wire. Moreover, you may manufacture a tension material from fiber reinforced plastics, such as an aramid fiber and carbon fiber. Examples of the type of the cable 23 include a multi-type cable and a parallel cable. In order to improve the anticorrosion and durability of the tendon, a tendon may be coated with a covering material made of polyethylene, fluororesin, epoxy resin, or the like.

  As shown in FIG. 2, the first fixing portion 24 is a facing portion (facing surface) facing the lower surface 10 a of the lower connecting portion 10 on the support surface 15 of the bridge pier 3 at a position on the first side portion 7 side of the bridge girder 2. ) Is fixed to a portion (hereinafter referred to as non-opposing surface 15a). That is, the support surface (upper surface) 15 of the pier 3 is wider than the lower connection portion 10 adjacent to the pier 3 and has a portion protruding in the width direction of the bridge girder from the lower connection portion 10. The first fixing unit 24 is fixed at that portion. The first fixing unit 24 has a flat plate-like first fixing bracket 26 fixed to the non-facing surface 15a with bolts 38 (FIG. 1) and the like, and a pin hole 27 extending along the bridge axis direction of the bridge girder 2, The first standing portion 28 erected on the first fixing bracket 26, the first pin 29 inserted in the pin hole 27 in a loosely fitted state, and the first pin 29 are coupled to the one end 21 of the cable 23. And the first terminal unit 30 to be fixed.

  The first terminal portion 30 has a female screw formed at the other end 30 b opposite to the one end 30 a coupled to the first pin 29, and a male screw formed at the tip 21 a of the one end 21 of the cable 23. Has been. The one end portion 21 of the cable 23 is fixed to the first fixing portion 24 by screwing the male screw of the tip end portion 21 a of the one end portion 21 with the female screw of the other end portion 30 b of the first terminal portion 30.

  As shown in FIG. 2, the second fixing unit 25 is located on the support surface 15 of the pier 3 at a position opposite to the first fixing unit 24 across the bridge girder 2, that is, at a position on the second side 8 side. It is fixed to a portion (non-facing surface 15a) other than the facing portion (facing surface) facing the lower surface of the lower connecting portion 10. The second fixing unit 25 has the same structure as the first fixing unit 24. That is, the second fixing unit 25 has a flat plate-like second fixing bracket 31 fixed to the non-facing surface 15a with a bolt or the like, and a pin hole 32 extending along the bridge axis direction of the bridge girder 2, and the second fixing portion 25 is provided. The second standing portion 33 erected on the bracket 31, the second pin 34 inserted in the pin hole 32 in a loosely fitted state, and the second pin 34 are coupled to fix the other end portion 22 of the cable 23. 2nd terminal part 35 is included.

  The second terminal portion 35 has a female screw formed at the other end portion 35 b opposite to the one end portion 35 a coupled to the second pin 34, and a male screw at the tip end portion 22 a of the other end portion 22 of the cable 23. Is formed. The other end portion 22 of the cable 23 is fixed to the second fixing portion 25 by screwing the male screw of the distal end portion 22 a of the other end portion 22 with the female screw of the second terminal portion 35.

  The first fixing unit 24 and the second fixing unit 25 configured as described above are set so as to be positioned on the same straight line in the width direction of the bridge beam 2 together with the through hole 14 of the bridge beam 2. Therefore, the cable 23 extends linearly in the width direction of the bridge beam 2 when viewed from above the bridge beam 2.

  Further, the position of the through hole 14 through which the cable 23 fixed to the first fixing unit 24 and the second fixing unit 25 is inserted as described above is the first fixing unit 24 and the first fixing unit 24 as viewed from the support surface 15 of the pier 3. 2 is set higher than the fixing unit 25. Accordingly, the one end portion 21 of the cable 23 protruding from the first through portion 12 is fixed to the first fixing portion 24 at a predetermined first angle α1 with respect to the horizontal direction, and from the second through portion 13. The other end portion 22 of the protruding cable 23 is fixed to the second fixing portion 25 at a predetermined second angle α2 with respect to the horizontal direction. The cable 23 fixed to the first fixing unit 24 and the second fixing unit 25 in this way is formed into an outward opening 36 in the first penetration part 12 and an outward opening 37 in the second penetration part 13. On the other hand, a downward force is applied. As a result, the bridge girder 2 is restricted from being displaced upwardly away from the support surface 15 of the pier 3.

  The first angle α1 and the second angle α2 are 30 ° or more, preferably about 45 °, and more preferably about 60 °. As the first angle α <b> 1 and the second angle α <b> 2 increase, the cable 23 can effectively bear the upward displacement in which the bridge girder 2 tends to move away from the support surface 15 of the pier 3. The first angle α1 and the second angle α2 appropriately adjust the height position of the through hole 14, the distance of the first fixing unit 24 to the first side 7 and the distance of the second fixing unit 25 to the second side 8. You can set it.

  Since the opening 36 of the first penetrating portion 12 and the opening 37 of the second penetrating portion 13 are portions where the load from the cable 23 concentrates, the inner surface 96a is provided below each of the opening 36 and the opening 37. A shock absorbing member 96 having an R surface curved toward the end is inserted. Since the load can be dispersed by the R surface 96a of the buffer member 96, the cable 23 is damaged due to the contact between the cable 23 and the openings 36 and 37 and the bending of the cable 23 at the openings 36 and 37. It is suppressed.

  The first fixing unit 24 and the second fixing unit 25 are not necessarily set on the same straight line as the through hole 14. For example, the first fixing unit 24 and the second fixing unit 25 are bridged with respect to the through hole 14. They may be shifted in the axial direction, and may be alternately arranged in the bridge axis direction with the through hole 14 interposed therebetween. Even when the first fixing unit 24 and the second fixing unit 25 are arranged so as to be shifted in the bridge axis direction, the upward displacement in which the bridge girder 2 is separated from the support surface 15 of the bridge pier 3 can be restricted.

  Hereinafter, a procedure for installing the movement suppressing device having the above-described configuration on the bridge 1 will be described. First, the cable 23 is prepared (preparation step). In the present embodiment, “preparing the cable 23” means that the cable 23 is transported to the construction site, and the installation work is waited for. Next, the first fixing portion 24 is fixed to the non-opposing surface 15a of the bridge pier 3 on the first side portion 7 side of the bridge girder 2 (first fixing step), and at the second side portion 8 side of the bridge girder 2. The second fixing unit 25 is fixed to the non-facing surface 15a of the bridge pier 3 (second fixing step).

  Next, at a position higher than the first fixing unit 24 and the second fixing unit 25, the first through portion 12 is formed in the first side portion 7 and the second through portion 13 is formed in the second side portion 8. By providing, the through hole 14 is formed (through hole forming step). In addition, you may perform a through-hole formation step before a preparation step, a 1st fixing step, and a 2nd fixing step.

  And the one end part 21 of the cable 23 protrudes from the first penetration part 12 to the outer surface 7a side of the first side part 7, and the other end part 22 extends from the second penetration part 13 to the outer surface 8a of the second side part 8. The cable 23 is inserted into the through hole 14 so as to protrude to the side (cable insertion step). The cable 23 may be inserted from the first penetration part 12 or may be inserted from the second penetration part 13.

  Next, the one end portion 21 of the cable 23 protruding from the first penetration portion 12 is fixed to the first fixing portion 24 (first fixing step), and the other end portion of the cable 23 protruding from the second penetration portion 13 is fixed. 22 is fixed to the second fixing unit 25 (second fixing step).

  When the above-described steps, that is, the preparation step, the first fixing step, the second fixing step, the through hole forming step, the cable insertion step, the first fixing step, and the second fixing step are completed, the one end 21 of the cable 23 becomes horizontal. The first fixing portion 24 is fixed at a first angle α1 with respect to the direction, and the other end portion 22 is fixed at the second fixing portion 25 at a second angle α2 with respect to the horizontal direction. The cable 23 can be extended in the width direction of the bridge girder 2. As a result, the bridge girder 2 is restricted from being displaced upward from the support surface 15 of the pier 3.

  According to the movement suppressing device according to the first embodiment having the above-described configuration, the through hole 14 through which the cable 23 is inserted fixes the first fixing portion 24 and the other end portion 22 that fix the one end portion 21 of the cable 23. Since it is set at a position higher than the second fixing unit 25, each of the one end 21 and the other end 22 of the cable 23 is fixed at a first angle α1 and a second angle α2 with respect to the horizontal direction. ing. As a result, the upward displacement of the bridge girder 2 is restricted, and even if an upward lifting force that attempts to lift the bridge girder 2 from the support surface 15 of the pier 3 due to an earthquake, storm surge or the like acts on the bridge girder 2, Is prevented from floating from the support surface 15 of the pier 3. As a result, the deviation of the bridge girder 2 from the pier 3 is prevented.

  Further, according to the movement suppressing device according to the first embodiment, the first fixing portion 24 that fixes the one end portion 21 of the cable 23 and the second fixing portion 25 that fixes the other end portion 22 of the cable 23 are the bridge girder 2. Since the first fixing portion 24 and the second fixing portion 24 are fixed to the bridge pier 3 as compared with the conventional configuration in which the fixing portion is fixed to the bridge girder 2 while avoiding the reinforcing bars and the PC steel material extending inside the bridge girder 2. Installation of the fixing unit 25 is easy. The process of forming the through hole 14 to the extent that the cable 23 can be inserted into the bridge girder 2 is easier than the process of fixing the fixing portion to the bridge girder 2.

  Furthermore, according to the movement suppressing device according to the first embodiment, the first fixing unit 24 and the second fixing unit 25 are fixed to the non-facing surface 15a of the bridge pier 3 that does not oppose the bridge girder 2, so the first fixing unit 24 and the second fixing portion 25 can be fixed to the pier 3 even before the bridge girder 2 is placed on the pier 3 or after the bridge girder 2 is placed on the pier 3. . Therefore, the movement suppressing device according to the first embodiment can be applied not only to the newly-installed bridge 1 but also to the existing bridge 1.

  As described above, the movement suppressing device according to the first embodiment is easy to install the first fixing unit 24 and the second fixing unit 25 while preventing the bridge girder 2 from being lifted from the pier 3, and the newly installed bridge 1. It can be applied not only to the existing bridge 1.

  In addition, although description of the movement suppression apparatus installed in the abutment 4 side is abbreviate | omitted, the said movement suppression apparatus also has the same effect | action as the movement suppression apparatus installed in the pier 3 side. In FIG. 1, two through holes 14 are formed in the bridge axis direction of the bridge girder 2, and two cables 23 inserted through the through holes 14 are fixed to the first fixing unit 24 and the second fixing unit 25. However, the number of cables 23 is not limited to two, and may be one or three or more according to design conditions.

(Second Embodiment)
Next, a movement suppressing device according to a second embodiment of the present invention will be described with reference to FIGS. The movement suppressing device according to the second embodiment is applied when the bridge girder 2 has a plurality of bridge girder portions in the bridge 1 shown in FIGS. 1 and 2. In FIG. 3, the bridge girder 2 has a plurality (seven in this embodiment) of bridge girder portions 41 to 47 that are adjacent to each other in the width direction of the bridge girder 2. Each of the bridge girder portions 41 to 47 has a T-shaped cross section, and has a flat plate portion 48 extending in the width direction of the bridge girder 2 and a leg portion 49 extending downward from the flat plate portion 48 in a substantially vertical direction. .

  The flat plate part 48 of each bridge girder part 41 to 47 has a first end face 51 and a second end face 52 that face each other in the width direction of the bridge girder 2. The leg portion 49 of each bridge girder includes a first side surface 53 and a second side surface 54 that face each other in the width direction of the bridge girder 2, and a lower surface 55 that is located on the opposite side of the flat plate portion 48.

  In the bridge girder portions 41 to 47, in the adjacent bridge girder portion, the first end surface 51 of the flat plate portion 48 of one bridge girder portion and the second end surface 52 of the flat plate portion 48 of the other bridge girder portion are in contact with each other. The 1st side surface 53 of the leg part 49 of the bridge girder 2 and the 2nd side surface 54 of the leg part 49 of the other bridge girder 2 are adjacent in the state which faced the said width direction.

  Each bridge girder portion 41 to 47 is supported by the pier 3 by the leg portion 49 being supported on the support surface 15 via the support portion 17 of the pier 3. In a state where the leg portion 49 is supported on the support surface 15 via the support portion 17, the lower surface 55 of the leg portion 49 supports the support surface via a slight gap formed between the lower surface 55 and the support surface 15. 15 is opposed. In other words, the support surface 15 includes a portion where the opposed lower surface 55 is close and a portion where the lower surface 55 is not opposed.

  The leg portions 49 of the bridge girders 41 to 47 are each formed with a through-hole portion 56 that is a hole extending in the horizontal direction from the first side surface 53 to the second side surface 54 and in the width direction of the bridge girder 2. The plurality of through-hole portions 56 constitute the through-hole 14 and are formed at a position higher than the first fixing portion 24 and the second fixing portion 25 in the movement suppressing device according to the second embodiment. Yes.

  In the movement suppressing device according to the second embodiment, as shown in FIG. 3, the cable 23 is inserted through the through-hole portions 56 of the bridge girders 41 to 47, and the one end 21 of the cable 23 is It projects from the through hole portion 56 of the bridge girder portion 41 at the end (left end in FIG. 3) to the first side surface 53 side, and the other end portion 22 of the bridge girder portion 47 at the other end (right end in FIG. 3) It protrudes from the through-hole part 56 to the second side face 54 side.

  The first fixing unit 24 is a portion (non-facing surface) other than the facing portion (facing surface) facing the lower surface 55 of the leg portion 49 on the support surface 15 of the pier 3 at the position on the first side surface 53 side of the left end bridge girder portion 41. 15a), the one end 21 of the cable 23 protruding from the through hole 56 of the left end bridge girder 41 is fixed. One end portion 21 of the cable 23 fixed to the first fixing portion 24 forms a predetermined angle with respect to the horizontal direction. As a result, the cable 23 applies a downward force to the opening 56 a on the first side surface 53 side in the through hole portion 56 of the left end bridge girder 41.

  The second fixing unit 25 is a portion (non-facing surface) other than the facing portion (facing surface) facing the lower surface 55 of the leg portion 49 on the support surface 15 of the pier 3 at the position on the second side surface 54 side of the right end bridge girder portion 47. 15a), and the other end portion 22 of the cable 23 protruding from the through hole portion 56 of the right end bridge girder portion 47 is fixed. The other end portion 22 of the cable 23 fixed to the second fixing portion 25 forms a predetermined angle with respect to the horizontal direction. As a result, the cable 23 applies a downward force to the opening 56 b on the second side surface 54 side in the through hole portion 56 of the right end bridge girder portion 47.

  The movement suppressing device according to the second embodiment further includes a stopper member and an intermediate holding portion provided on the support surface 15 of the bridge pier 3 in addition to the cable 23, the first fixing portion 24 and the second fixing portion 25. The stopper member and the intermediate holding part are provided between one bridge girder part and the adjacent bridge girder.

  In FIG. 3, the stopper member includes a first stopper member 61 provided between the second bridge girder portion 42 and the third bridge girder portion 43 from the left end, and the fifth bridge girder portion 45 and the sixth bridge girder from the left end. The second stopper member 62 is provided between the portion 46 and the second portion 46. Each of the first stopper member 61 and the second stopper member 62 is a member made of, for example, reinforced concrete, and has a first side wall 63 and a second side wall 64 that face each other in the width direction of the bridge girder 2.

  In the first stopper member 61, the first side wall 63 is opposed to the second side surface 54 of the bridge girder portion 42 with a predetermined gap, and the second side wall 64 is opposed to the first side surface 53 of the bridge girder portion 43. Facing each other through a predetermined gap. In the second stopper member 62, the first side wall 63 is opposed to the second side surface 54 of the bridge girder portion 45 with a predetermined gap, and the second side wall 64 is opposed to the first side surface 53 of the bridge girder portion 46. Facing each other through a predetermined gap.

  The first stopper member 61 and the second stopper member 62 regulate the displacement of the bridge girder portions 41 to 47 in the horizontal direction, in particular, the width direction of the bridge girder 2. Specifically, when an external force that attempts to displace the bridge girders 41 to 47 in the width direction, for example, an external force that attempts to displace the bridge girders 41 to 47 toward the first fixing unit 24 side, The first side surface 53 of the portion 43 abuts on the second side wall 64 of the first stopper member 61, and the first side surface 53 of the bridge girder portion 46 abuts on the second side wall 64 of the second stopper member 62. Therefore, the horizontal displacement of the bridge girders 41 to 47 is restricted by the first stopper member 61 and the second stopper member 62. As a result, the deviation of the bridge girder 41 to 47 from the pier 3 is prevented.

  An impact mitigating member 65 made of a rubber plate or the like can be provided on each of the first side wall 63 and the second side wall 64 of each stopper member 61, 62. Thereby, as described above, the first side surface 53 of the bridge girder 43 abuts on the second side wall 64 of the first stopper member 61, or the first side surface 53 of the bridge girder portion 46 is the second side wall of the second stopper member 62. Even if it comes into contact with the 64, the impact is mitigated by the impact mitigating member 65. As a result, damage to the bridge girder 43 and the bridge girder 46 is suppressed.

  The intermediate holding portion is configured to be able to hold the cable 23 between one bridge girder portion and a bridge girder portion adjacent thereto, and in FIG. 3, the second end girder portion 41 and the second end from the left end are arranged. A first intermediate holding part 71 provided between the bridge girder part 42, a second intermediate holding part 72 provided between the third bridge girder part 43 from the left end and the fourth bridge girder part 44 from the left end, A third intermediate holding portion 73 provided between the bridge girder portion 44 and the fifth bridge girder portion 45 from the left end, and a fourth intermediate portion provided between the sixth girder portion 46 and the right end bridge girder portion 47 from the left end. And holding unit 74.

  Since the first intermediate holding part 71 to the fourth intermediate holding part 74 have the same structure, the structure will be described with the first intermediate holding part 71 as a representative example with reference to FIG. The first intermediate holding part 71 includes a base 75 fixed to the support surface 15 of the pier 3 and a cable holding part 76 fixed to the base 75.

  The base 75 is opposed to the main body portion 88 longer in the width direction of the bridge girder than the cable holding portion 76, the plate-like flange portion 78 fixed to the support surface 15 of the bridge pier 3 by bolts 77 and the like, and the width direction of the bridge girder 2. The first side wall 79 and the second side wall 80 are provided. The cable holding portion 76 is fixed to the upper surface 81 of the main body portion 88.

  The cable holding portion 76 holds the cable 23 extending between the left end bridge girder portion 41 and the bridge girder portion 42 at a position lower than the through hole portion 56 of the left end bridge girder portion 41 and the through hole portion 56 of the bridge girder portion 42. It is configured to be possible. In the movement suppressing device according to the second embodiment, the cable holding portion 76 has an insertion hole 82 extending in the width direction of the bridge girder 2 at a position lower than the through hole portion 56 of the left end bridge girder portion 41 and the through hole portion 56 of the bridge girder portion 42. The cable 23 extending between the left end bridge girder portion 41 and the bridge girder portion 42 is inserted into the through hole portion 56 and the bridge girder portion of the left end bridge girder portion 41 by inserting the cable 23 through the insertion hole 82. It is held at a position lower than the through-hole portion 56 of 42.

  The cable holding portion 76 is a member composed of, for example, a pair of upper and lower holding portions divided into upper and lower portions, and either or both of the upper holding portion and the lower holding portion are provided with an insertion hole 82. The groove part which comprises is formed. The cable 23 is inserted into the insertion hole 82 by joining the upper holding portion and the lower holding portion with a bolt or the like while the cable is sandwiched between the groove portion of the upper holding portion and the groove portion of the lower holding portion. In this state, it is held by the cable holding portion 76. Instead of the configuration in which the cable holding portion 76 is formed from a pair of the upper holding portion and the lower holding portion, the cable holding portion 76 may be constituted by a block-shaped integral object. In that case, the insertion hole 82 is a single through hole formed in the cable holding portion 76 along the width direction of the bridge beam 2.

  Therefore, the cable 23 held by the cable holding portion 76 is horizontal between the opening portion 56 b on the second side surface 54 side in the through hole portion 56 of the left end bridge girder portion 41 and one opening portion 82 a in the insertion hole 82. And a horizontal angle between the opening 56a on the first side surface 53 side of the through hole portion 56 of the bridge girder portion 42 and the other opening portion 82b of the insertion hole 82. On the other hand, a predetermined angle γ is formed. Thus, the cable 23 held by the cable holding portion 76 includes the opening 56b on the second side surface 54 side in the through hole portion 56 of the left end bridge girder portion 41 and the first side surface 53 side in the through hole portion 56 of the bridge girder portion 42. A force acting downward is applied to the opening 56a.

  Similarly to the first intermediate holding part 71, the second intermediate holding part 72 to the fourth intermediate holding part 74 also hold the cable 23 at a position lower than the through hole part 56 between the corresponding bridge beams. That is, in the bridge girder 43 and the bridge girder 44, a downward force is applied to the bridge girder 45, the bridge girder 46, and the right end bridge girder 47 via the through hole 56 by the cable 23.

  As described above, in the movement suppressing device according to the second embodiment, in addition to the first fixing unit 24 and the second fixing unit 25, the bridge girders 41 to 47 are also formed by the first intermediate holding unit 71 to the fourth intermediate holding unit 74. The upward displacement away from the support surface 15 of the pier 3 is restricted.

  Also in the movement suppressing device according to the second embodiment, the predetermined angles β and γ of the cable 23 by the first fixing unit 24, the second fixing unit 25, and the first intermediate holding unit 71 to the fourth intermediate holding unit 74 are Similarly to the movement suppressing device according to the embodiment, the angle is set to 30 ° or more, preferably about 45 °, and more preferably about 60 °.

  Since the lower surfaces 83 and 84 of the openings 56a and 56b in the through hole portion 56 of the left end bridge girder 41 are portions where loads from the cable 23 are concentrated, as shown in FIG. R side By making each lower surface 83,84 into R surface, the said load can be disperse | distributed, the cable 23 resulting from the contact of the cable 23 and each lower surface 83,84, and the bending of the cable 23 in opening part 56a, 56b. Damage is suppressed. R surfaces 83 and 84 are also appropriately formed in each through-hole portion 56 of the bridge girder portion 42 to the bridge girder portion 47.

  In the movement suppressing device according to the second embodiment, the R surfaces are directly formed on the lower surfaces 83 and 84 of both the openings 56a and 56b of the through-hole portion 56. The buffer member 96 shown may be fitted into each of the openings 56a and 56b. Further, in the movement suppressing device according to the first embodiment, the buffer member 96 is fitted in each of the opening 36 and the opening 37, but instead of this configuration, as shown in FIG. Each lower surface of the opening 37 may be an R surface that curves downward. Further, as another means for suppressing damage to the cable 23, a mold having an R surface curved downward is fitted into the openings 36, 37, 56a, and 56b, and resin is inserted into the gap between the through hole 14 and the cable 23. R surfaces may be formed in the openings 36, 37, 56a, and 56b by injecting and the like.

  Further, since the upper surfaces 85 and 86 of the openings 82a and 82b in the insertion hole 82 of the first intermediate holding portion 71 are portions where loads from the cable 23 are concentrated, as shown in FIG. The curved R surface. By making each upper surface 85,86 into R surface, the said load can be disperse | distributed, the cable 23 resulting from the contact of the cable 23 and each upper surface 85,86, and the bending of the cable 23 in opening part 82a, 82b. Damage is suppressed. R surfaces 85 and 86 are also appropriately formed in the insertion holes 82 of the second intermediate holding portion 72 to the fourth intermediate holding portion 74.

  Each of the first intermediate holding part 71 to the fourth intermediate holding part 74 regulates the displacement of the bridge girder part 41 to the bridge girder part 47 in the width direction of the bridge girder 2 like the first stopper member 61 and the second stopper member 62. can do. Specifically, for example, when an external force is applied to displace the bridge girder portion 41 to the bridge girder portion 47 toward the first fixing portion 24, the first side surface 53 of the bridge girder portion 42 is formed by the first intermediate holding portion 71. The first side surface 53 of the bridge girder portion 44 abuts on the second side wall 80 of the base 75 of the second intermediate holding portion 72 and the first side surface 53 of the bridge girder portion 45. Is in contact with the second side wall 80 of the base 75 of the third intermediate holding part 73, and the first side surface 53 of the right end bridge girder part 47 is in contact with the second side wall 80 of the base 75 of the fourth intermediate holding part 74. . Therefore, the horizontal displacement of the bridge girders 41 to 47 is restricted by the first intermediate holding part 71 to the fourth intermediate holding part 74. As a result, the deviation of the bridge girder 41 to 47 from the pier 3 is prevented.

  An impact relaxation member 87 made of a rubber plate or the like can be provided on each of the first side wall 79 and the second side wall 80 of the base 75 of each intermediate holding portion 71 to 74. Thereby, the impact to the 1st intermediate holding part 71-the 4th intermediate holding part 74 of the bridge girder part 42, the bridge girder part 44, the bridge girder part 45, and the right end bridge girder part 47 and the nonuniformity of action force are relieved. Thereby, the damage of the bridge girder part 42, the bridge girder part 44, the bridge girder part 45, and the right end bridge girder part 47 is suppressed.

  Hereinafter, a procedure for installing the movement suppressing device according to the second embodiment on the bridge 1 will be described. First, the cable 23 is prepared (preparation step). Next, the first fixing portion 24 is fixed to the non-opposing surface 15a of the pier 3 on the first side surface 53 side of the left end bridge girder portion 41 (first fixing step), and the second side surface 54 side of the right end bridge girder portion 47 is also fixed. And the 2nd fixing | fixed part 25 is fixed to the non-facing surface 15a of the pier 3 (2nd fixing step).

  Next, between the left end bridge girder part 41 and the bridge girder part 42, between the bridge girder part 43 and the bridge girder part 44, between the bridge girder part 44 and the bridge girder part 45, and between the bridge girder part 46 and the right end bridge girder part 47. The corresponding first intermediate holding part 71 to fourth intermediate holding part 74 are installed on the support surface 15 of the pier 3 (intermediate holding part installation step).

  Next, the first girder part 24, the second fusing part 25, and the first intermediate holding part 71 to the fourth intermediate holding part 74 are penetrated into the bridge girder part 41 to the bridge girder part 47 at positions higher than the insertion holes 82, respectively. The through-hole 14 is formed by drilling the hole 56 (through-hole forming step). The one end portion 21 of the cable 23 protrudes from the through hole portion 56 of the left end bridge girder portion 41 toward the first side surface 53 side of the left end bridge girder portion 41, and the other end portion 22 is the through hole portion 56 of the right end bridge girder portion 47. The cable 23 is inserted through the through-hole portions 56 of the bridge girder portion 41 to the bridge girder portion 47 so as to protrude from the right end bridge girder portion 47 to the second side surface 54 side (cable insertion step) and the first intermediate holding portion 71. -The fourth intermediate holding part 74 is sandwiched between the upper holding part and the lower holding part and is inserted into the insertion hole 82. The cable 23 may be inserted from the left end bridge girder 41 side or may be inserted from the right end bridge girder 47 side.

  Next, the one end portion 21 of the cable 23 protruding from the left end bridge girder portion 41 is fixed to the first fixing portion 24 (first fixing step), and the other end portion 22 of the cable 23 protruding from the right end bridge girder portion 47 is fixed. Fixing is performed on the second fixing unit 25 (second fixing step).

  When the above-described steps, that is, the preparation step, the first fixing step, the second fixing step, the intermediate holding portion installation step, the through hole forming step, the cable insertion step, the first fixing step, and the second fixing step are completed, the cable 23 The bridge girder in a state in which the first fixing unit 24, the second fixing unit 25, and the first intermediate holding unit 71 to the fourth intermediate holding unit 74 form predetermined angles α1, α2, β, γ with respect to the horizontal direction. 41 to the bridge girder 47 can be extended. As a result, the bridge girders 41 to 47 are restricted from being displaced upwardly away from the support surface 15 of the pier 3.

  The first stopper member 61 is installed between the bridge girder portion 42 and the bridge girder portion 43, and the second stopper member 62 is installed between the bridge girder portion 45 and the bridge girder portion 46. The two stopper members 62 can be omitted.

  According to the movement suppressing device according to the second embodiment having the above configuration, the first fixing unit 24 and the second fixing unit 25 are fixed at a predetermined angle with respect to the horizontal direction. The cable girder 23 held by the first intermediate holding part 71 to the fourth intermediate holding part 74 restricts the upward displacement of the bridge girder part 41 to the bridge girder part 47. Thereby, even if the bridge girder 2 has a plurality of bridge girder parts (bridge girder part 41 to bridge girder part 47), the bridge girder part 41 to bridge girder part 47 is lifted from the support surface 15 of the pier 3 due to an earthquake, storm surge, or the like. When the lifting force to be applied acts, the bridge girder part 41 to the bridge girder part 47 are prevented from floating from the support surface 15 of the pier 3. As a result, the deviation of the bridge girder 2 from the pier 3 is prevented.

  Also in the movement suppressing device according to the second embodiment, the first fixing portion 24 that fixes the one end portion 21 of the cable 23 and the second fixing portion 25 that fixes the other end portion 22 of the cable 23 include the left end bridge girder portion 41. Since it is fixed to the bridge pier 3 instead of the right end bridge girder 47, the first portion is compared with the conventional configuration in which the fixing portion is fixed to the bridge girder 2 while avoiding the reinforcing bars and PC steel materials extending inside the bridge girder 2. The fixing unit 24 and the second fixing unit 25 can be easily installed. The process of forming the through-hole part 56 to the extent that the cable 23 can be inserted in each of the left end bridge girder part 41 and the right end bridge girder part 47 is easier than the process of fixing the fixing part to the bridge girder 2.

  Furthermore, also in the movement suppressing device according to the second embodiment, the first fixing unit 24 and the second fixing unit 25 are fixed to the non-facing surface 15a of the bridge pier 3 that does not oppose the bridge girder 2, and thus the first fixing unit 24. And the fixing to the bridge pier 3 of the 2nd fixing | fixed part 25 mounted the bridge girder part 41-bridge girder part 47 on the pier 3 even before mounting the bridge girder part 41-bridge girder part 47 on the pier 3 You can do it later. Therefore, the movement suppressing device according to the second embodiment can be applied not only to the newly-installed bridge 1 but also to the existing bridge 1.

  As described above, the movement restraint device according to the second embodiment, like the travel restraint device according to the first embodiment, prevents the bridge girder portion 41 to the bridge girder portion 47 from being lifted from the bridge pier 3 and the first fixing portion 24. In addition, the second fixing unit 25 can be easily installed, and can be applied not only to the new bridge 1 but also to the existing bridge 1.

  In addition, also in the movement suppression device according to the second embodiment, as shown in FIG. 1, two through-hole portions 56 arranged in the bridge axis direction of the bridge girder 2 are formed in each of the bridge girder portions 41 to 47, Two cables 23 may extend in the width direction of the bridge girder 2. In that case, the two cables 23 may be inserted through the insertion holes 82 of the first intermediate holding part 71 to the fourth intermediate holding part 74 as shown in FIG. In this way, by inserting the two cables 23 through the common insertion hole 82, it is not necessary to provide an intermediate holding portion for each cable 23. Further, all of the first intermediate holding unit 71 to the fourth intermediate holding unit 74 may be omitted, or only a part thereof may be omitted.

  In the movement suppressing device according to the first embodiment and the second embodiment described above, the upper surface 15 of the pier 3 in which the first fixing unit 24 and the second fixing unit 25 are configured as the support surface 15 that supports the bridge girder 2. However, the fixing portion of the first fixing unit 24 and the second fixing unit 25 is not limited to the upper surface 15 of the pier 3, and the first fixing unit 24 is connected to the pier 3 as shown in FIG. 6. The second fixing portion 25 may be fixed to the other side surface 16 of the pier 3 while being fixed to the one side surface 16 of the pier 3. Even in that case, the one end 21 and the other end 22 of the cable 23 can be fixed at a predetermined angle with respect to the horizontal direction.

  Further, in the movement suppressing devices according to the first and second embodiments described above, the first fixing unit 24 and the second fixing unit 25 are of a so-called pin fixing type in which the cable 23 is fixed using pins. As described above, the first fixing unit 24 and the second fixing unit 25 may be of a so-called nut fixing type in which the cable 23 is fixed using a fixing nut. Specifically, as shown in FIG. 7, the first fixing unit 24 includes a flat fixing plate 89 fixed to the non-facing surface 15 a of the pier 3 with a bolt or the like, and a pair of standing upright on the fixing plate 89. A standing nut 90, an insertion plate 91 fixed between the pair of standing portions 90, and a fixing nut 92 screwed into the tip 21 a of the one end 21 of the cable 23.

  The insertion plate 91 has a first surface 93 and a second surface 94 opposite to the first surface 93, and an insertion hole 95 is formed from the first surface 93 to the second surface 94. The distal end portion 21 a of the one end portion 21 of the cable 23 is inserted from the first surface 93 side to the second surface 94 side. Since the front end portion 21a is formed with a male screw, the fixing nut 92 is brought into contact with the second surface 94 by screwing the fixing nut 92 into the front end portion 21a protruding from the second surface 94 side. Thus, one end portion 21 of the cable 23 is fixed to the first fixing portion 24. The nut diameter of the fixing nut 92 is set larger than the hole diameter of the insertion hole 95, and the cable 23 is prevented from coming off. Since the second fixing unit 25 has the same configuration as the first fixing unit 24, the description thereof is omitted. Although not shown, the first fixing unit 24 and the second fixing unit 25 fix the cable by interposing a shim plate or the like between the insertion plate 91 and the distal end portion 21a of the one end portion 21 of the cable 23. Also, a so-called support pressure fixing type may be used.

  Further, in the movement suppressing device according to the first embodiment described above, the configuration in which the cable 23 is extended in the width direction of the bridge girder 2 has been described, but the cable 23 is in the direction of the bridge axis perpendicular to the width direction of the bridge girder 2. It can also be extended to. Specifically, when the bridge girder 2 has an end cross girder extending in the width direction of the bridge girder 2, the through hole 14 is formed in the end cross girder so as to extend in the bridge axis direction, and the first fixing portion 24 is The first fixing unit 24 is fixed to a surface of the bridge pier 3 other than the facing surface opposite to the end cross beam to fix the one end portion 21 of the cable 23 and the second fixing unit 25 sandwiches the end cross beam. The other end portion 22 of the cable 23 is fixed by being fixed to a surface other than the facing surface facing the end cross beam in the pier 3 at the opposite side position.

  Also in this configuration, the one end 21 and the other end 22 of the cable 23 are fixed to the first fixing unit 24 and the second fixing unit 25 at a predetermined angle with respect to the horizontal direction. The upward displacement is restricted by the cable 23 extending in the bridge axis direction of the bridge girder 2. Thereby, even if the lifting force which tries to lift the end cross girder from the pier 3 acts, the end cross girder is prevented from floating from the pier 3. As a result, the deviation of the bridge girder 2 from the pier 3 is prevented.

1 Bridge 2 Bridge girder 3 Bridge pier (support)
4 Abutment (support stand)
14 Through hole 21 One end 22 Other end 23 Cable 24 First fixing unit 25 Second fixing unit 41 to 47 Bridge girder 56 Through hole 61 First stopper member 62 Second stopper member 71 to 74 First to fourth intermediate Holding part 82 Insertion hole

Claims (15)

A movement restraint device that is applied to a bridge in which a bridge girder is placed on a support stand and prevents the deviation of the bridge girder,
A cable having one end and the other end;
A first fixing unit that is fixed to a surface of the support base other than the facing surface that faces the bridge beam, and fixes the one end of the cable;
A second fixing portion fixed to a surface other than the facing surface facing the bridge beam in the support base, and fixing the other end portion of the cable;
With
The cable is inserted into a through hole formed in the bridge girder at a position between the first fixing unit and the second fixing unit and at a position higher than the first fixing unit and the second fixing unit. Moving restraint device. The movement suppressing device according to claim 1,
The bridge girder has a plurality of adjacent bridge girder parts,
The through-hole has a plurality of through-hole portions formed in each of the plurality of bridge beams.
The first fixing portion fixes the one end portion of the cable protruding from the through hole portion in the bridge girder portion at one end of the plurality of bridge girder portions,
The second fixing unit is a movement suppressing device that fixes the other end of the cable protruding from the through hole in the bridge girder at the other end. The movement suppressing device according to claim 2,
The plurality of bridge girders include a first bridge girder and a second bridge girder located next to the first bridge girder,
The support base is provided with a stopper member so as to be positioned between the adjacent first and second bridge beams.
The said stopper member is a movement suppression apparatus comprised so that the displacement to the horizontal direction of the said 1st bridge beam part and a 2nd bridge beam part may be controlled. 4. The movement suppressing device according to claim 3, wherein the stopper member has a first side wall and a second side wall that face each other between the first bridge girder and the second bridge girder.
Each of the first side wall and the second side wall is provided with an impact mitigation member capable of mitigating an impact when colliding with the first bridge girder part or the second bridge girder part. The movement suppressing device according to claim 2,
The plurality of bridge girders include a first bridge girder and a second bridge girder located next to the first bridge girder,
The support base is provided with an intermediate holding portion so as to be positioned between the adjacent first and second bridge beams.
The intermediate holding unit is a movement suppressing device configured to be able to hold the cable at a position lower than the through hole.   The movement suppressing apparatus according to claim 5, wherein the intermediate holding part is configured to restrict a displacement in a horizontal direction of the first bridge girder part and the second bridge girder part. The movement suppressing device according to claim 6, wherein the intermediate holding portion has a first side wall and a second side wall that face each other between the first bridge girder portion and the second bridge girder portion,
Each of the first side wall and the second side wall is provided with an impact mitigation member capable of mitigating an impact when colliding with the first bridge girder part or the second bridge girder part.   The movement suppressing apparatus according to claim 1, wherein a buffer member having an inner surface that curves downward is provided at an opening of the through hole.   The movement suppressing apparatus according to claim 1, wherein a lower surface of the opening of the through hole is curved downward. 2. The movement suppressing device according to claim 1, wherein when the bridge girder has an end cross girder extending in a width direction of the bridge girder, the through hole extends in the bridge axis direction orthogonal to the width direction. Formed in the girder,
The first fixing unit is fixed to a surface other than the facing surface facing the end cross beam in the support base, and fixes one end of the cable.
The second fixing portion is fixed to a surface other than the facing surface facing the end cross beam in the support base, and fixes the other end portion of the cable. A movement restraining method applied to a bridge having a bridge girder placed on a support stand to prevent the bridge girder from deviating,
A preparation step of preparing a cable having one end and the other end;
A first fixing step of fixing the first fixing unit to a surface other than the facing surface facing the bridge beam in the support base;
A second fixing step of fixing the second fixing portion to a surface other than the facing surface facing the bridge beam in the support base;
A through hole forming step for forming a through hole in the bridge beam at a position between the first fixing unit and the second fixing unit and higher than the first fixing unit and the second fixing unit;
A cable insertion step of inserting a cable through the through hole;
A first fixing step of fixing the one end of the cable to the first fixing unit;
A second fixing step of fixing the other end of the cable to a second fixing unit;
A method for suppressing movement including: The movement restraining method according to claim 11,
The bridge girder has a plurality of adjacent bridge girder parts,
In the through hole forming step, a plurality of through hole portions are formed in each of the plurality of bridge beams.
In the cable insertion step, the cable is inserted through the plurality of through holes,
In the first fixing step, among the plurality of bridge girders, the one end of the cable protruding from the through hole in the bridge girder at one end is fixed to the first fixing unit,
In the second fixing step, the movement suppressing method of fixing the other end portion of the cable protruding from the through hole portion at the bridge girder portion at the other end to the second fixing portion. The movement suppression method according to claim 12,
The plurality of bridge girders include a first bridge girder and a second bridge girder located next to the first bridge girder,
A stopper member is provided on the support base so as to be positioned between the first bridge girder part and the second bridge girder part and to restrict horizontal displacement of the first bridge girder part and the second bridge girder part. The movement suppression method. The movement suppression method according to claim 12,
The plurality of bridge girders include a first bridge girder and a second bridge girder located next to the first bridge girder,
An intermediate holding part installation step of providing an intermediate holding part on the support base so as to be positioned between the first bridge girder part and the second bridge girder part and to hold the cable at a position lower than the through hole part; Furthermore, the movement suppression method containing. The movement restraining method according to claim 11,
The bridge girder has an end cross girder extending in the width direction of the bridge girder;
In the through hole forming step, the through hole is formed in the end cross beam so as to extend in a bridge axis direction orthogonal to the width direction of the bridge beam,
In the first fixing step, the first fixing unit is fixed to a surface other than the facing surface facing the end cross beam in the support base,
In the second fixing step, the second fixing unit fixes the second fixing unit to a surface other than the facing surface facing the end cross beam in the support base.

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