JP2015086562A - Abutment reinforcing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an abutment reinforcing structure for reinforcing an existing abutment, which hardly affects an under clearance, which can be inexpensively and rapidly constructed, and which facilitates inspection and maintenance.SOLUTION: The abutment reinforcing structure is used for a bridge 1 that includes a plurality of abutments 2, and a girder 3 laid across the plurality of opposed abutments 2. The abutment reinforcing structure comprises regulation members 11, 21 and 31 that face at least any one of wall surfaces 2b, 2c of at least one of the plurality of opposed abutments 2 and at least one end surface 3a of the girder 3 with a gap in between.

Description

  The present invention relates to an abutment reinforcing structure that reinforces an existing abutment.

  Conventionally, in order to seismically reinforce an existing abutment, a hole that penetrates the abutment and reaches the stable ground diagonally below is formed, and a reinforcing member made of steel is inserted into the hole from one end and then filled with a solidifying material. A technique of solidifying and fixing the other end of the reinforcing member to the ground portion of the abutment to integrate the abutment and the reinforcing member is disclosed (see Patent Document 1).

  FIG. 24 shows a plan view of a conventional abutment reinforcing structure. 25 shows a ZZ cross-sectional view of FIG.

  For example, when such a technique is used for the abutment 1 that uses the bottom of the girder 3 for a road or the like, the structure is as shown in FIGS. When the bottom of the girder 3 is used for a road or the like, the lower side of the girder 3 of the abutment 2 is a space, so the abutment 2 is pressed in the direction of the arrow A from the outside by earth pressure. Conventionally, in order to restrict the movement caused by the pressing, the ground anchor 100 that reaches the stable ground is driven from the underside of the abutment 2 through the abutment 2 toward the diagonally downward direction, and the inclination of the abutment 2 is pulled outward. Was.

JP 2002-167711 A

  However, construction work for driving the ground anchor 100 from a narrow space under the girder 3 is difficult. For example, even if it is attempted to drive the ground anchor 100 into the upper part of the abutment 2 so that the head 101 of the ground anchor 100 is disposed upward, the girder 3 becomes an obstacle. Further, when the fixing layer into which the ground anchor 100 is driven is deep, the construction period becomes long and the construction cost becomes high.

  After the construction, the head 101 of the ground anchor 100 that supports the abutment protrudes about 50 cm to 1 m into the space below the girder 3 and remains as an obstacle. Further, in order to make the remaining ground anchor 100 function effectively in a continuous manner and to prevent the head 101 from dropping or the like, regular maintenance management is required.

  An object of the present invention is to provide an abutment reinforcement structure that reinforces an existing abutment that has little influence on the under-sparing space, can be quickly constructed at low cost, and is easy to inspect and maintain.

An abutment reinforcing structure according to an embodiment of the present invention is:
Multiple abutments,
A girder spanned across the plurality of abutments facing each other;
Used for bridges with
It is characterized by comprising a regulating member that faces at least one of the wall surface of at least one abutment of the abutment or at least one end surface of the beam with a gap.

Moreover, the abutment reinforcement structure of one embodiment according to the present invention is:
The gap between the abutment and the regulating member is smaller than the gap between the abutment and the girder.

Moreover, the abutment reinforcement structure of one embodiment according to the present invention is:
The gap between the abutment and the restricting member is equal to or greater than the amount of expansion / contraction associated with the temperature change of the beam.

Moreover, the abutment reinforcement structure of one embodiment according to the present invention is:
The restriction member is a member different from the girder, and is spanned across the plurality of abutments facing each other.

Moreover, the abutment reinforcement structure of one embodiment according to the present invention is:
A base plate for installing the regulating member on the abutment;
The base plate is formed with a long hole extending in the longitudinal direction of the restricting member for inserting a bolt for connecting the restricting member to the abutment.

Moreover, the abutment reinforcement structure of one embodiment according to the present invention is:
The restriction member is attached to a lower surface of the beam.

Moreover, the abutment reinforcement structure of one embodiment according to the present invention is:
The girder is made of steel,
The restriction member is attached by a bolt inserted into an existing hole formed in the girder.

Moreover, the abutment reinforcement structure of one embodiment according to the present invention is:
The restriction member is attached between an end face of the beam and a wall surface of the abutment.

Moreover, the abutment reinforcement structure of one embodiment according to the present invention is:
The sum of the gap between the abutment and the regulating member and the gap between the beam and the regulating member is smaller than the gap between the abutment and the girder.

Moreover, the abutment reinforcement structure of one embodiment according to the present invention is:
The sum of the gap between the abutment and the regulating member and the gap between the beam and the regulating member is equal to or greater than the amount of expansion and contraction associated with the temperature change of the beam.

Moreover, the abutment reinforcement structure of one embodiment according to the present invention is:
It has a reinforcing member installed in at least one part of the parapet which the said abutment counters.

Moreover, the abutment reinforcement structure of one embodiment according to the present invention is:
It has a reinforcement member installed in at least one part of the front surface which a plurality of abutments oppose.

Moreover, the abutment reinforcement structure of one embodiment according to the present invention is:
It has a reinforcement member installed in the slit formed in the front surface which a plurality of abutments oppose.

Moreover, the abutment reinforcement structure of one embodiment according to the present invention is:
A first reinforcing member installed in a slit formed in a vertical direction on the front surface of the plurality of abutments facing each other;
A second reinforcing member coupled to a lower end of the first reinforcing member;
It is characterized by having.

  According to one embodiment of the present invention, there is provided an abutment reinforcement structure that reinforces an existing abutment that has less influence on the under-girder space, can be quickly constructed at low cost, and is easy to inspect and maintain. It becomes possible to do.

The top view of the bridge and abutment reinforcement structure of a 1st embodiment concerning the present invention is shown. AA sectional drawing of FIG. 1 is shown. The one part enlarged view of the abutment reinforcement structure of 1st Embodiment concerning this invention is shown. The BB sectional view of Drawing 3 is shown. FIG. 4 is a cross-sectional view taken along the line CC in FIG. 3. The top view of the bridge and abutment reinforcement structure of the 1st example of 2nd Embodiment concerning this invention is shown. The DD sectional drawing of FIG. 6 is shown. The one part enlarged view of the abutment reinforcement structure of 2nd Embodiment concerning this invention is shown. EE sectional drawing of FIG. 8 is shown. FF sectional drawing of FIG. 8 is shown. The one part enlarged view of the abutment reinforcement structure of the 2nd example of 2nd Embodiment concerning this invention is shown. GG sectional drawing of FIG. 11 is shown. The HH sectional view of Drawing 11 is shown. The top view of the bridge and abutment reinforcement structure of 3rd Embodiment concerning this invention is shown. The JJ sectional view of Drawing 14 is shown. The one part enlarged view of the abutment reinforcement structure of 3rd Embodiment concerning this invention is shown. FIG. 17 is a sectional view taken along the line KK in FIG. 16. The auxiliary reinforcement element of the 1st example added to the abutment reinforcement structure of a 3rd embodiment is shown. The auxiliary reinforcement element of the 2nd example added to the abutment reinforcement structure of 3rd Embodiment is shown. The auxiliary reinforcement element of the 3rd example added to the abutment reinforcement structure of a 3rd embodiment is shown. LL sectional drawing of FIG. 20 is shown. FIG. 22 is a sectional view taken along line MM in FIG. 21. The auxiliary reinforcement element of the 4th example added to the abutment reinforcement structure of a 3rd embodiment is shown. The top view of the conventional abutment reinforcement structure is shown. The ZZ sectional view of Drawing 24 is shown.

  Hereinafter, an abutment reinforcing structure according to an embodiment of the present invention will be described.

  FIG. 1 is a plan view of a bridge 1 and an abutment reinforcing structure 10 according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line AA in FIG.

  An existing bridge 1 using the abutment reinforcing structure 10 of the present embodiment includes an abutment 2 and a girder 3 that is hung on the abutment 2. The abutment 2 is formed with a support surface 2a that supports the beam 3, a first wall surface 2b that rises from the support surface 2a, and a second wall surface 2c that falls downward from the support surface 2a. The girder 3 is supported by a support member 4 placed on the support surface 2a. In the existing bridge 1, a first gap δ 1 having a predetermined dimension is formed between the first wall surface 2 b of the abutment 2 and the end surface 3 a of the beam 3. The first gap δ1 is equal to or greater than the amount of expansion / contraction associated with the temperature change of the girder 3 and is a predetermined ratio with respect to the length of the girder 3 although it varies depending on the material.

  The abutment reinforcing structure 10 of the present embodiment is used for a bridge 1 including a plurality of abutments 2 and girders 3 that span the abutments 2. In the abutment reinforcing structure 10, when a force to tilt the abutment 2 due to earth pressure or the like is applied, the regulating member 11 receives the force and can suppress the tilt.

  First, the abutment reinforcing structure 10 of the first embodiment will be described.

  FIG. 3: shows the one part enlarged view of the abutment reinforcement structure 10 of 1st Embodiment concerning this invention. FIG. 4 is a cross-sectional view taken along the line BB in FIG. FIG. 5 shows a cross-sectional view taken along the line CC of FIG.

  In the bridge 1 of the first embodiment, the girder 3 has an RC structure or a PC structure. As another embodiment, the girder 3 may be a steel structure.

  The abutment reinforcing structure 10 includes a regulation member 11, a filling member 12, a base plate 13, and anchor bolts 14.

  The regulating member 11 is a member different from the girder 3, and is spanned in parallel with the girder 3 on a planar support surface 2 a formed inside two opposing abutments 2. The regulating member 11 is bridged over the interposing member 12 placed on the support surface 2a via the base plate 13. A second gap δ <b> 2 is formed between at least one end surface 11 a of the regulating member 11 and the abutment 2. The second gap δ2 is preferably smaller than the first gap δ1 formed between the abutment 2 and the beam 3.

  The restricting member 11 is made of steel. The cross-sectional shape of the regulating member 11 in the direction perpendicular to the beam 3 is a rectangle.

  In the first embodiment, the material of the restricting member 11 is steel and the cross-sectional shape is rectangular. However, as another embodiment, the material and shape of the restricting member 11 may be other as long as they are appropriately determined according to design strength and the like. Material and shape may be sufficient. For example, the material of the regulating member 11 may be concrete or a material including both steel and concrete, and the cross-sectional shape may be any of a circle, an I type, an H type, and the like.

  The filling member 12 is placed on the support surface 2 a of the abutment 2. It is preferable that the filling member 12 is formed in a plate shape with concrete. The base plate 13 is installed between the regulating member 11 and the filling member 12. The base plate 13 is a steel plate and is fixed to the regulating member 11 by welding or the like.

  As shown in FIG. 5, a plurality of long holes 13 a extending in the longitudinal direction of the regulating member 11 are formed in the base plate 13. The anchor bolt 14 is inserted into the long hole 13 a formed in the base plate 13, passes through the interposing member 12, and is driven into the abutment 2, thereby attaching the regulating member 11 to the abutment 2. Both end portions 11a of the regulating member 11 supported by the support surface 2a face the first wall surface 2b of the abutment 2 respectively.

  In the abutment reinforcing structure 10 of the first embodiment installed in this way, there is little influence on the space under the girder 3, it can be quickly constructed at low cost, and it is easy to check and maintain. It is possible to provide the abutment reinforcing structure 10 that reinforces the abutment 2. Further, since the regulating member 11 is a member different from the girder 3 and is spanned across the plurality of abutment 2 facing each other, the influence on the space below the girder 3 is further reduced.

  Further, as shown in FIG. 5, even if the anchor member 14 is inserted into the long hole 13a formed in the base plate 13 and the regulating member 11 formed of steel or the like expands and contracts with temperature change, the anchor bolt Since 14 is arranged in the long hole 13a, the anchor bolt 14 is not subjected to stress due to expansion and contraction of the restricting member 11, and it is possible to allow expansion and contraction accompanying the temperature change of the restricting member 11.

  Further, when the abutment 2 starts to be inclined due to earth pressure or the like, the relative positions of the anchor bolt 14 and the long hole 13a of the base plate 13 change. When the inclination of the abutment 2 becomes a certain size, the anchor bolt 14 comes into contact with the end portion of the long hole 13 and the relative position cannot be changed any more. Since the opposite end of the regulating member 11 is fixed to the opposite abutment 2 and cannot move, it is possible to receive the force that the regulating member 11 pulls and tilts the abutment 2 and suppress the inclination after this stage. It becomes possible.

  Further, even when the earth pressure for inclining the abutment 2 is large, the anchor bolt 14 or the base plate 13 is damaged, and the inclination of the abutment 2 further proceeds, the abutment 2 contacts the restriction member 11 and the restriction member 11 is stretched. Thus, it is possible to receive the force for inclining the abutment 2 and suppress the inclination. Even in this case, since δ1> δ2, the girder 3 and the first wall surface 2b do not contact each other.

  Thus, in the abutment reinforcement structure 10 of the first embodiment, the inclination of the abutment 2 can be suppressed without damaging the beam 3.

  Further, since the gap between the abutment 2 and the regulating member 11 is equal to or greater than the amount of expansion and contraction associated with the temperature change of the girder 3, the abutment 2 and the regulating member 11 are in contact with each other in an environment where the abutment 2 is not inclined. It becomes possible to prevent.

  Next, the abutment reinforcing structure 20 of the second embodiment will be described. In the second embodiment, a regulating member is attached below the girder 3. A case where a steel girder 3 is used as a first example of the second embodiment and a case where a girder 3 including concrete is used as a second example will be described.

  FIG. 6: shows the top view of the bridge 1 and the abutment reinforcement structure 20 of the 1st example of 2nd Embodiment concerning this invention. FIG. 7 is a sectional view taken along the line DD of FIG. FIG. 8: shows the one part enlarged view of the abutment reinforcement structure 20 of the 1st example of 2nd Embodiment concerning this invention. FIG. 9 shows a cross-sectional view taken along line EE of FIG. FIG. 10 is a cross-sectional view taken along the line FF in FIG.

  The girder 3 of the bridge 1 of the first example of the second embodiment is an I-shaped steel as shown in FIG. The girder 3 includes a web 3b, an upper flange 3c formed at the upper end of the web 3b, and a lower flange 3d formed at the lower end of the web 3b.

  The abutment reinforcing structure 20 of the first example of the second embodiment includes a regulating member 21 and a high tension bolt 22.

  The regulating member 21 is made of steel having a base portion 21a, an upper flange 21b formed at the upper end of the base portion 21a, and a side flange 21c formed at the side end of the base portion 21a. Then, the upper flange 21 b of the regulating member 21 is attached to the lower flange 3 d of the girder 3 by the high tension bolt 22.

  The end surface 3a of the girder 3 supported by the support surface 2a is opposed to the first wall surface 2b with a first gap δ1 between them, and at least one side flange 21c of the regulating member 21 is second It faces the wall 2c with a third gap δ3. The third gap δ3 between the side flange 21c of the regulating member 21 and the second wall surface 2c of the abutment 2 is preferably smaller than the first gap δ1 between the abutment 2 and the beam 3.

  In the abutment reinforcing structure 20 of the first example of the second embodiment installed in this way, the position of the regulating member 21 can be higher than the head 101 of the ground anchor shown in FIG. It is possible to provide the abutment reinforcing structure 20 that reinforces the existing abutment 2 that has little influence on the space below the space 3, can be quickly constructed at low cost, and can be easily inspected and maintained.

  In addition, when the abutment 2 is actually inclined, the abutment 2 comes into contact with the regulating member 21, so that the inclination of the abutment 2 can be suppressed.

  Further, by appropriately adjusting the magnitude relationship of the proof stress of the high tension bolt 22, the steel material near the lower flange 3 d of the girder 3 to which the high tension bolt 22 is attached, and the regulating member 21, the three members can be relatively replaced. It is also possible to reduce the damage of the girder 3 by damaging only the easy high tension bolt 22 and the regulating member 21 and absorbing the tilt energy of the abutment 2, and to restore the bridge in a short time.

  Further, it is preferable that the high tension bolt 22 is inserted into a hole formed in advance after removing a rivet usually attached to the lower flange 3d of the existing girder 3. By utilizing the existing holes, the restricting member 21 can be easily attached to the girder 3, and quick construction can be performed at a lower cost.

  Moreover, since the clearance gap between the abutment 2 and the control member 21 is more than the expansion-contraction amount accompanying the temperature change of the girder 3, in a normal use environment where the abutment 2 is not inclined, the abutment 2 and the control member 21 are in contact. It becomes possible to prevent.

  FIG. 11: shows the one part enlarged view of the abutment reinforcement structure 30 of the 2nd example of 2nd Embodiment concerning this invention. FIG. 12 shows a GG cross-sectional view of FIG. FIG. 13 is a cross-sectional view taken along the line HH in FIG.

  The girder 3 of the bridge 1 of the second example of the second embodiment is a long rectangular parallelepiped as shown in FIG. 11 and includes RC or PC concrete.

  The abutment reinforcing structure 30 of the second example of the second embodiment includes a regulating member 31 and a post-construction anchor 32. The restriction member 31 may be made of steel or concrete. The upper surface 31 a of the restricting member 31 is attached to the lower surface 3 e of the beam 3 with a post-installed anchor 32.

  The end surface 3a of the girder 3 supported by the support surface 2a is opposed to the first wall surface 2b with a first gap δ1 therebetween, and at least one side surface 31b of the regulating member 31 is the second wall surface 2c. With a fourth gap δ4 therebetween. The fourth gap δ4 between the side surface 31b of the regulating member 31 and the second wall surface 2c of the abutment 2 is preferably smaller than the first gap δ1 between the abutment 2 and the girder 3.

  In the abutment reinforcing structure 30 of the second example of the second embodiment installed in this way, the position of the regulating member 31 can be higher than the head 101 of the ground anchor shown in FIG. Thus, it is possible to provide an abutment reinforcing structure 30 that reinforces the existing abutment 2 that has less influence on the space below 3, can be quickly constructed at low cost, and can be easily inspected and maintained.

  In addition, when the abutment 2 is actually inclined, the abutment 2 comes into contact with the restriction member 31 first, so that the inclination of the abutment 2 can be suppressed.

  In addition, since the gap between the abutment 2 and the regulating member 31 is equal to or greater than the amount of expansion and contraction accompanying the temperature change of the girder 3, the abutment 2 and the regulating member 31 are in contact with each other in an environment where the abutment 2 is not inclined. It becomes possible to prevent.

  Next, the abutment reinforcing structure 40 of the third embodiment will be described.

  FIG. 14: shows the top view of the bridge 1 and the abutment reinforcement structure 40 of 3rd Embodiment concerning this invention. FIG. 15 shows a JJ cross-sectional view of FIG. FIG. 16: shows the one part enlarged view of the abutment reinforcement structure 40 of 3rd Embodiment concerning this invention. FIG. 17 is a sectional view taken along the line KK of FIG.

  The abutment reinforcing structure 40 of the third embodiment includes a regulating member 41 attached to at least one first wall surface 2b of each abutment 2 facing each other. The material of the regulating member 41 may be rubber or the like. The restricting member 41 attached to the first wall surface 2 b faces the end surface 3 a of the girder 3.

  In the abutment reinforcement structure 40 of the third embodiment installed in this way, there is no influence on the space below the girder 3, it can be quickly constructed at low cost, and the inspection and maintenance management is easy. It is possible to provide the abutment reinforcing structure 40 that reinforces the abutment 2.

  Moreover, since the abutment 2 contacts the control member 41 when the abutment 2 is actually inclined, the inclination of the abutment 2 can be suppressed. Moreover, since the material of the regulating member 41 is rubber or the like, damage to the end portion of the girder 3 can be reduced.

  Further, since the gap between the girder 3 and the regulating member 41 is equal to or greater than the amount of expansion and contraction accompanying the temperature change of the girder 3, the abutment 2 and the regulating member 41 are in contact with each other in a normal use environment where the abutment 2 is not inclined. It becomes possible to prevent.

  In this embodiment, the regulating member 41 is in contact with the first wall surface 2b of the abutment 2. However, the embodiment is not limited to this, and the regulating member 41 is in contact with the end surface 3a of the beam 3. Or the form which does not contact | abut neither the 1st wall surface 2b nor the end surface 3a of the girder 3 may be sufficient.

  Next, auxiliary reinforcing elements used for the abutment reinforcing structures 10 to 40 will be described. An auxiliary reinforcement element can be used for each abutment reinforcement structure 10-40 of 1st Embodiment-3rd Embodiment.

  First, the auxiliary reinforcing element of the first example will be described.

  FIG. 18 shows a first example auxiliary reinforcing element 50 added to the abutment reinforcing structure 40 of the third embodiment.

  The auxiliary reinforcing element 50 of the first example has a reinforcing member 51 such as a reinforcing bar driven from the upper surface of the abutment 2. The reinforcing member 51 is inserted into a hole formed in the parapet portion 2e. The hole is preferably formed in the vertical direction. The depth of the hole is preferably deeper than the parapet portion 2e. The hole in which the reinforcing member 51 is inserted is filled with cement paste, mortar or the like.

  Thus, by using the auxiliary reinforcing element 50 of the first example for the abutment reinforcing structures 10 to 40 of the first to third embodiments, the abutment 2 contacting the girder 3 receives the force received from the girder 3. It is possible to further reinforce the abutment 2 by suppressing the force applied near the middle in the vertical direction by the force received from the outside by the earth pressure.

  Next, the auxiliary reinforcing element of the second example will be described.

  FIG. 19 shows a second example auxiliary reinforcing element 60 added to the abutment reinforcing structure 40 of the third embodiment.

  The auxiliary reinforcing element 60 of the second example includes a reinforcing member 61 installed on at least a part of the front surface below the second wall surface 2c including the second wall surface 2c. The reinforcing member 61 is made of a steel sheet or a fibrous sheet such as carbon or aramid. The reinforcing member 61 may be installed on the entire lower surface including the second wall surface 2c.

  Thus, by using the auxiliary reinforcing element 60 of the second example for the abutment reinforcing structures 10 to 40 of the first embodiment to the third embodiment, the abutment 2 that contacts the girder 3 receives the force received from the girder 3. It is possible to further reinforce the abutment 2 by suppressing the force applied near the middle in the vertical direction by the force received from the outside by the earth pressure.

  Next, the auxiliary reinforcing element of the third example will be described.

  FIG. 20 shows a third example auxiliary reinforcing element 70 added to the abutment reinforcing structure 40 of the third embodiment. FIG. 21 shows an LL cross-sectional view of FIG. 22 shows a MM cross-sectional view of FIG.

  As shown in FIG. 21, the auxiliary reinforcing element 70 of the third example includes a reinforcing member 71 installed in a slit formed on the front surface below the second wall surface 2 c. The reinforcing member 71 is made of a reinforcing bar or a fibrous member such as carbon or aramid.

  As shown in FIG. 22, the slit in which the reinforcing member 71 is installed is filled with cement paste, mortar, or the like. Therefore, the front surface of the abutment 2 is covered with cement paste, mortar, etc., and the reinforcing member 71 is not exposed.

  Thus, by using the auxiliary reinforcing element 70 of the third example for the abutment reinforcing structures 10 to 40 of the first to third embodiments, the abutment 2 that contacts the girder 3 receives the force received from the girder 3. It is possible to further reinforce the abutment 2 by suppressing the force applied near the middle in the vertical direction by the force received from the outside by earth pressure.

  FIG. 23 shows an auxiliary reinforcing element 80 of a fourth example added to the abutment reinforcing structure 40 of the third embodiment.

  Further, the auxiliary reinforcing element 80 of the fourth example includes a second reinforcing member 82 such as a reinforcing bar connected to the lower end of the first reinforcing member 81 in addition to the auxiliary reinforcing element 70 of the third example. The second reinforcing member 82 is inserted in the ground and the abutment 2 with an oblique hole. The hole in which the second reinforcing member 82 is inserted is filled with cement paste, mortar, or the like. Moreover, when the 1st reinforcement member 81 and the 2nd reinforcement member 82 are both reinforcing bars, it is preferable to connect the 1st reinforcement member 81 and the 2nd reinforcement member 82 by welding or a joint.

  Thus, by using the auxiliary reinforcing element 80 of the fourth example for the abutment reinforcing structures 10 to 40 of the first to third embodiments, the abutment 2 that contacts the girder 3 receives the force received from the girder 3. It is possible to further reinforce the abutment 2 by suppressing the force applied near the middle in the vertical direction by the force received from the outside by the earth pressure. In addition, the second reinforcing member 82 is inserted by making an oblique hole in the ground and the abutment 2, and the second reinforcing member 82 is connected to the lower end of the first reinforcing member 81, thereby reducing the amount of soil to be excavated. However, the abutment 2 can be further reinforced.

  Further, the auxiliary reinforcing elements 50 to 80 of the first example to the fourth example may be used in combination.

  As described above, according to the abutment reinforcing structures 10, 20, 30, and 40 of the present embodiment, the bridge 1 including the plurality of abutments 2 and the girders 3 spanned across the plurality of opposed abutments 2. A regulating member 11 that is opposed to at least one of the wall surfaces 2b, 2c of at least one abutment 2 of at least one abutment 2 of the abutment 2 and at least one end surface 3a of the girder 3, Since 21, 21, 41 are provided, the abutment reinforcement structure that reinforces the existing abutment 2 that has less influence on the space below the girder 3, can be quickly constructed at low cost, and is easy to inspect and maintain. 10, 20, 30, 40 can be provided.

  Further, in the abutment reinforcing structure 10 according to the present embodiment, the gap between the abutment 2 and the regulating members 11, 21, 31, 41 is smaller than the gap between the abutment 2 and the girder 3. In this case, the regulating members 11, 21, 31, 41 come into contact with the abutment 2, and the inclination of the abutment 2 can be suppressed.

  Further, in the abutment reinforcing structure 10 of the present embodiment, the gap between the abutment 2 and the regulating members 11, 21, 31, 41 is greater than or equal to the amount of expansion / contraction associated with the temperature change of the girder 3. In such an environment, it is possible to prevent the abutment 2 and the regulating members 11, 21, 31, 41 from coming into contact with each other.

  Further, in the abutment reinforcing structure 10 of the present embodiment, the restricting member 11 is a member different from the girder 3 and spans a plurality of the abutment 2 facing each other. Impact is reduced.

  In addition, the abutment reinforcing structure 10 of the present embodiment includes a base plate 13 that installs the regulating member 11 on the abutment 2, and a regulating member for inserting a bolt 14 that connects the regulating member 11 to the abutment 2 in the base plate 13. Since the elongated hole 13a extending in the longitudinal direction of 11 is formed, it becomes possible for the restricting member 11 to allow expansion and contraction accompanying a temperature change.

  Moreover, in the abutment reinforcement structures 20 and 30 of this embodiment, since the regulating members 21 and 31 are attached to the lower surface of the girder 3, it is possible to perform a quick construction at a low cost.

  Further, in the abutment reinforcing structure 20 of the present embodiment, the girder 3 is made of steel, and the restricting member 21 is attached by a high-tensile bolt 22 that is inserted into an existing hole formed in the girder 3. The hole can be used, so that a quick construction can be performed at a lower cost.

  In addition, in the abutment reinforcing structure 40 of the present embodiment, the regulating member 41 is attached between the end face of the beam 3 and the wall surface of the abutment 2, so there is no effect on the space below the beam 3 and the cost is low. It is possible to reinforce the existing abutment 2 that can be quickly constructed and easily inspected and maintained.

  Further, in the abutment reinforcing structure 40 of the present embodiment, the sum of the gap between the abutment 2 and the regulating member 41 and the gap between the girder 3 and the regulating member 41 is smaller than the gap between the abutment 2 and the girder 3. In this case, the regulating member 41 comes into contact with the abutment 2 first, so that the inclination of the abutment 2 can be suppressed and damage to the girder 3 can be reduced.

  Further, in the abutment reinforcing structure 40 of the present embodiment, the sum of the gap between the abutment 2 and the regulating member 41 and the gap between the girder 3 and the regulating member 41 is equal to or greater than the amount of expansion and contraction accompanying the temperature change of the girder 3. It is possible to prevent the abutment 2 and the regulating member 41 from coming into contact with each other in a normal use environment where the angle is not inclined.

  Moreover, in the abutment reinforcement structure 10, 20, 30, 40 of this embodiment, since it has the reinforcement member 51 installed in at least one part of the parapet 2e which the some abutment 2 opposes, the abutment 2 which contacted the girder 3 is provided. It is possible to further reinforce the abutment 2 by suppressing the force applied in the vicinity of the middle in the vertical direction by the force received from the girder 3 and the force received from outside by the earth pressure.

  Moreover, in the abutment reinforcement structure 10, 20, 30, 40 of this embodiment, since it has the reinforcement member 61 installed in at least one part of the front surface 2c which the some abutment 2 opposes, the abutment 2 which contacted the girder 3 is provided. It is possible to further reinforce the abutment 2 by suppressing the force applied in the vicinity of the middle in the vertical direction by the force received from the girder 3 and the force received from the outside by the earth pressure.

  Moreover, in the abutment reinforcement structure 10, 20, 30, 40 of this embodiment, since it has the reinforcement member 71 installed in the slit formed in the front surface 2c which the some abutment 2 opposes, the abutment 2 which contacted the girder 3 However, it is possible to further reinforce the abutment 2 by suppressing the force applied near the middle in the vertical direction by the force received from the girder 3 and the force received from the outside by earth pressure.

  Moreover, in the abutment reinforcement structure 10, 20, 30, 40 of this embodiment, the 1st reinforcement member 81 installed in the slit formed in the front surface 2c which the some abutment 2 opposes, and the lower end of the 1st reinforcement member 81 And the second reinforcing member 82 connected to the abutment, the abutment 2 in contact with the girder 3 suppresses the force applied to the vicinity of the middle in the vertical direction by the force received from the girder 3 and the force received from the outside by earth pressure, The abutment 2 can be further reinforced, and the abutment 2 can be further reinforced while reducing the amount of soil to be excavated.

  Although various embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various variations and modifications may be added to these detailed contents. In addition, embodiments configured by appropriately combining the configurations of the respective embodiments also fall within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Bridge 2 ... Abutment 3 ... Girder 4 ... Support member 10,20,30,40 ... Abutment reinforcement structure 11,21,31,41 ... Regulation member 12 ... Stamping member 13 ... Base plate 14 ... Anchor bolt 14
22 ... High tension bolt 32 ... Post-installed anchors 50, 60, 70, 80 ... Auxiliary reinforcement elements 51, 61, 71 ... Reinforcement member 81 ... First reinforcement member 82 ... Second reinforcement member

Claims (14)

Multiple abutments,
A girder spanned across the plurality of abutments facing each other;
Used for bridges with
An abutment reinforcing structure comprising a restricting member that faces at least one of the wall surface of at least one abutment of the abutment or at least one end surface of the beam. . The abutment reinforcing structure according to claim 1, wherein a gap between the abutment and the regulating member is smaller than a gap between the abutment and the girder. The abutment reinforcing structure according to claim 2, wherein a gap between the abutment and the regulating member is equal to or greater than an amount of expansion and contraction accompanying a temperature change of the girder. 4. The abutment reinforcing structure according to claim 1, wherein the restricting member is a member different from the girders and is spanned across the plurality of abutments facing each other. 5. A base plate for installing the regulating member on the abutment;
5. The abutment reinforcing structure according to claim 4, wherein a long hole extending in a longitudinal direction of the restricting member for inserting a bolt connecting the restricting member to the abutment is formed in the base plate. . The abutment reinforcing structure according to claim 1, wherein the restricting member is attached to a lower surface of the beam. The girder is made of steel,
The abutment reinforcing structure according to claim 6, wherein the restricting member is attached by a bolt inserted into an existing hole formed in the girder. The abutment reinforcing structure according to any one of claims 1 to 3, wherein the restricting member is attached between an end face of the beam and a wall surface of the abutment. The abutment reinforcing structure according to claim 8, wherein a total of a gap between the abutment and the regulating member and a gap between the girder and the regulating member is smaller than a gap between the abutment and the girder. 10. The abutment reinforcing structure according to claim 9, wherein a total of a gap between the abutment and the restriction member and a gap between the girder and the restriction member is equal to or more than an amount of expansion and contraction accompanying a temperature change of the girder. 11. The abutment reinforcing structure according to claim 1, further comprising a reinforcing member that is installed on at least a part of opposing parapets of the plurality of abutments. The abutment reinforcing structure according to any one of claims 1 to 11, further comprising a reinforcing member installed on at least a part of front surfaces of the plurality of abutments facing each other. The abutment reinforcing structure according to any one of claims 1 to 12, further comprising a reinforcing member installed in a slit formed in a vertical direction on a front surface of the plurality of abutments facing each other.
A first reinforcing member installed in a slit formed on the front surface of the plurality of abutments facing each other;
A second reinforcing member coupled to a lower end of the first reinforcing member;
The abutment reinforcing structure according to any one of claims 1 to 12, characterized by comprising:

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