JP2010053643A - Abutment and method for reinforcing fill provided on backside of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an abutment capable of sufficiently increasing the proof strength of an abutment without requiring a large construction and a method for reinforcing a bank provided on the back thereof.
A bank 3 is formed on the back side of an abutment 2 in a bridge 1. A fixing plate 5 is provided on the slope of the bank 3. The cable 7 enters the embankment 3 from the surface side of the abutment 2, and the cable 7 advances from the slope of the embankment 3. Thereafter, the end of the cable 7 advanced from the slope of the embankment 3 is fixed to the fixing plate 5. Thus, the bridge 1 is reinforced by integrating the abutment 2 and the fixing plate 5.
[Selection] Figure 1

Description

  The present invention relates to an abutment and a method for reinforcing embankments provided on the back of the abutment.

  As a method of reinforcing an abutment with embankment on the back, conventionally, for the purpose of seismic reinforcement of the pier, the cable is anchored from the pier to the abutment at both ends of the bridge, and the abutment is restrained via the cable. (See, for example, Patent Documents 1 and 2). Moreover, there exists a thing which installs apparatuses, such as a damper, between a bridge girder and an abutment, and reduces the seismic force transmitted from a bridge girder (for example, refer patent documents 3 and 4).

When reinforcing a bridge, there is a method of reconstructing an abutment (for example, see Patent Document 5). In this technology, a retaining wall is placed on the back of the existing abutment, the space between the existing abutment and the retaining wall is excavated, and the ground where the tensile reinforcement material with a tensile core material inserted is reinforced is added to the retaining wall. To do. Thereafter, a foundation is constructed in the excavated space, and then a new abutment is constructed so as to be integrated with the tensile reinforcement and the retaining wall.
JP 2004-19327 A JP 2006-307444 A JP 2007-16500 A JP 2007-40097 A JP 2005-68816 A

  However, all of the reinforcing methods disclosed in Patent Documents 1 to 4 are performed on a multi-span bridge, and the reinforcement for a single-span bridge is originally high in earthquake resistance. However, the seismic reinforcement for single-span bridges is not well developed. When reinforcing a bridge provided with an abutment with embankment on the back side, in general, with respect to an increase in the earth pressure on the back side of the abutment, methods such as improving the proof stress of the foundation and improving the proof stress of the frame can be considered. However, these methods have a problem that the abutment strength cannot be sufficiently increased.

  Moreover, when newly installing an abutment by the technique disclosed in Patent Document 5, high yield strength can be obtained. However, in the construction method disclosed in Patent Document 5, it is necessary to newly install an abutment, and there is a problem that the construction is inevitably large.

  Then, the subject of this invention is providing the reinforcement method of the embankment provided in the abutment and its back which can fully raise the yield strength of an abutment, without requiring large construction.

  The abutment according to the present invention that has solved the above problems and the embankment reinforcement method provided on the back surface of the abutment in a bridge comprising an abutment provided with embankment on the back surface, and a bridge girder whose end is supported by the abutment, and its A method for reinforcing embankment provided on a back surface, wherein a embankment reinforcement member that reinforces the embankment is provided on the embankment, and the abutment and the embankment reinforcement member are integrated.

  In the abutment according to the present invention and the embankment reinforcement method provided on the back thereof, the abutment and the embankment reinforcement member are integrated. For this reason, the proof stress of an abutment can fully be raised. Further, the integration of the abutment and the embankment reinforcing member is realized by connecting the abutment and the embankment reinforcing member with a cable or the like, for example, and the construction becomes easy. As a result, the proof strength of the abutment can be sufficiently increased without requiring extensive construction.

  Here, the embankment reinforcement member is provided on the slope of the embankment, and the abutment and the embankment reinforcement member can be integrated by connecting the abutment and the embankment reinforcement member with a cable.

  In this way, by connecting the abutment and the embankment reinforcing member with a cable, a triangle or a trapezoid is formed by the cable. By integrating the abutment and the embankment reinforcing member with the cable arranged in such a shape, the abutment and the embankment reinforcing member can be firmly integrated.

  Moreover, after letting a cable penetrate from the surface side of an abutment to the back side of an abutment, it can be penetrated in embankment and it can be set as the aspect which connects the other end part of a cable, and embankment reinforcement member.

  In this way, the cable located on the surface side of the abutment by passing the cable from the surface side of the abutment to the back side of the abutment and then penetrating it into the embankment and connecting the other end of the cable and the embankment reinforcing member The distance between the one end side of the cable and the other end side of the cable attached to the embankment reinforcing member can be shortened. For this reason, the length of the cable can be shortened. Further, when the cable is loosened or damaged, re-tensioning or replacement can be easily performed.

  Furthermore, the cable is wound around the abutment side from the surface side of the abutment and arranged along the slope of the embankment to connect the other end of the cable and the embankment reinforcing member. .

  In this way, by winding the cable from the surface side of the abutment to the side surface side of the abutment and connecting the other end of the cable and the embankment reinforcing member, a through-hole through which the cable passes through the abutment is formed. The abutment and the embankment reinforcing member can be integrated without any problem. Furthermore, when the cable is loosened or damaged, the cable can be easily re-tensioned or replaced.

  Moreover, it can be set as the aspect which attaches the one end part of a cable to the one end part of a bridge girder.

  Thus, by attaching one end of the cable to one end of the bridge girder, the cable can be fixed more easily than when the cable is attached to the abutment. For this reason, reinforcement of an abutment and embankment can be performed easily.

  Furthermore, abutments are provided at both ends of the bridge girder as a first abutment and a second abutment, respectively, a cable is arranged along the bridge girder, one end of the cable is passed through the first abutment, The first abutment is connected to the embankment reinforcement member in the embankment provided on the back surface, the other end of the cable is passed through the second abutment, and is connected to the embankment reinforcement member in the embankment provided on the back surface of the second abutment. And the embankment provided on the back surface of the first abutment, and the embankment provided on the back surface of the second abutment and the second abutment can be integrated.

  In this way, the first abutment and the embankment provided on the back of the first abutment are integrated, and the second abutment and the embankment provided on the back of the second abutment are integrated, so that both ends of the bridge The abutment and embankment provided on the side can be integrated together. Therefore, construction can be easily performed correspondingly.

  And it can be set as the aspect which provides a stopper with a play in at least one of the penetration part of the cable in a 1st abutment, and the penetration part of the cable in a 2nd abutment.

  In this way, the provision of a stopper with a gap allows the cable girder to expand and contract due to a constant temperature change, so that the cable tension does not fluctuate. it can.

  According to the abutment according to the present invention and the embankment reinforcement method provided on the back surface of the abutment, the proof strength of the abutment can be sufficiently increased without requiring extensive construction.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In each embodiment, portions having the same function are denoted by the same reference numerals, and redundant description may be omitted. First, the first embodiment will be described. 1 is a plan view of an essential part of a bridge including an abutment to be reinforced according to the first embodiment, FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIG. 3 is a sectional view taken along line III-III in FIG. is there.

  As shown in FIGS. 1 and 2, the bridge 1 on which the reinforcing method according to the present embodiment is performed is a so-called single-diameter bridge, and includes an abutment 2 but does not include a pier. The abutment 2 includes an abutment housing 11. Wing walls 12 are respectively provided on both sides of the rear surface of the abutment housing 11. Further, an abutment foundation 13 is provided below the abutment housing 11. The abutment housing 11, the wing wall 12, and the abutment foundation 13 are integrally formed.

  An embankment 3 is provided on the back of the abutment 2. This embankment 3 has a substantially trapezoidal cross section and a side surface as a slope. The abutment 2 supports one end of a steel main girder 4 serving as a bridge girder. The other end of the main girder 4 is also attached to an abutment (not shown), and the main girder 4 is supported by the abutment 2. The bridge 1 according to the present embodiment is a railway bridge, and a track (not shown) is laid on the upper surface side of the embankment 3 and the main girder 4 so that a train can run on the track. If the bridge is a road bridge, a road is formed on the upper surface side of the embankment 3.

  Furthermore, as shown in FIGS. 4 (a) and 4 (b), fixing plates 5 serving as embankment reinforcing members of the present invention are attached to the slopes facing each other in the embankment 3. The fixing plate 5 is made of, for example, a precast plate or a cast-in-place RC plate at the site, and is fixed to the embankment 3 by a stopper 6.

  A first cable 7 </ b> A made of an anchor cable is driven into the abutment 2 from the surface side of the abutment 2 toward the back side of the abutment 2. One end side of the first cable 7 </ b> A is fixed and fixed to the abutment 2 by the fixing member 8 on the surface side of the abutment 2. The first cable 7A penetrates the abutment 2 and the embankment 3 and is fixed and fixed to the fixing plate 5 on the other end side. The abutment 2 and the fixing plate 5 are integrated by the first cable 7A. In addition, as shown in FIG. 4B, two first cables 7 </ b> A may be attached to one fixing plate 5.

  Furthermore, as shown in FIG. 3, the fixing plates 5 provided on the slopes facing each other in the embankment 3 are connected by a second cable 7B. By the second cable 7B, the embankment 3 between the fixing plates 5 is further reinforced. As shown in FIG. 1, the abutment 2 and the fixing plate 5 are connected by a first cable 7A and a second cable 7B arranged in a substantially triangular or trapezoidal shape.

  Further, a reinforcing third cable 7 </ b> C facing the outside direction of the embankment 3 is attached to the fixing plate 5. Since the third cable 7C is constructed on a slope, there is no influence on the track and the like formed on the embankment 3, and the third cable 7C can be constructed even when the train is running on the track. Here, as shown in FIG. 4B, the fixing plate 5 is provided with two reinforcing cables. Further, the first cable 7A to the third cable 7C are attached to the fixing plate 5 by an attachment member 9 including an angle adjustment base 9A and a pressure bearing plate 9B.

  Next, the construction procedure of the abutment according to the present embodiment and the embankment reinforcement method provided on the back thereof will be described. The reinforcing method according to the present embodiment can be performed on either an existing bridge or a new bridge. Here, the reinforcement method with respect to the existing bridge is demonstrated. For this reason, the bridge 1 is already provided in the embankment 3.

  When reinforcing the bridge 1, first, fixing plates 5 are set on the facing slopes. Next, the second cable 7B is spanned between the fixing plates 5 installed. Subsequently, a through hole for allowing the first cable 7 </ b> A to pass through is formed in the abutment housing 11 of the abutment 2. If a through-hole is formed in the abutment housing 11, the 1st cable 7A will be inserted in a through-hole, and it will approach to the inner side of the embankment 3. FIG. Subsequently, the first cable 7 </ b> A that has penetrated to the inside of the embankment 3 is entered in the direction of the slope of the embankment 3 as it is.

  Then, the other end of the first cable 7 </ b> A is advanced from the slope of the embankment 3 and fixed to the fixing plate 5. Subsequently, the fixing member 8 is attached to one end portion of the first cable 7A. These steps are performed between the fixing plate 5 and the abutment 2 provided on the slopes of the embankment 3 facing each other. Then, by fixing one end portion of the first cable 7A to the surface side of the abutment 2, the abutment 2, the fixing plate 5, and the embankment 3 between them are integrated by the first cable 7A. Thereafter, a third cable 7 </ b> C is provided for the fixing plate 5 provided on the slope of the bank 3. Depending on the ground conditions, the third cable 7 </ b> C may be provided on the fixing plate 5 provided on the slope of the first embankment 3. In this way, the reinforcement of the bridge 1 is completed. In addition to the reinforcement of the bridge 1, the embankment 3 is also reinforced.

  Thus, in the reinforcement method of the embankment concerning this embodiment and the embankment provided in the back, the abutment 2 and the fixing board 5 are integrated via the cables 7A and 7B. For this reason, the yield strength of the abutment 2 can be sufficiently increased. Further, in order to increase the proof strength of the abutment 2, only the cables 7A and 7B are provided on the abutment 2 and the fixing plate 5. For this reason, even if it compares with the case where an anchor is hit from the surface side of the abutment 2 and the proof stress of the abutment 2 is raised, the proof stress of the abutment 2 can be improved, without performing a large-scale construction. In addition, since only the first cable 7A is inserted from the surface side of the abutment 2, the construction can be performed even when the train is running on the track laid on the embankment 3 and the main girder 4. Therefore, the construction period can be shortened.

  Next, a second embodiment of the present invention will be described. The abutment according to the present embodiment and the embankment reinforcement method provided on the back thereof are mainly different in the installation mode of the first cable 7A compared to the first embodiment. FIG. 5 is a plan view of a principal part of a bridge including an abutment on which reinforcement according to the second embodiment is performed. In the first embodiment, the first cable 7A is made to enter inside the embankment 3, whereas in the present embodiment, the first cable 7A is wound from the outside of the embankment 3 as shown in FIG. Rotating, arranged along the slope of Embankment 3.

  Further, a planar protection saddle 31 is provided at the center of the abutment 2 on the surface side, and corner protection saddles 32 are provided at both ends of the surface side. The planar protective saddle 31 and the corner protective saddle 32 are both disposed between the abutment 2 and the first cable 7A, and the first cable 7A is cut while avoiding contact between the abutment 2 and the first cable 7A. Is preventing. Further, there are three saddles of protective saddles 31 and 32, and the first cable 7A is deflected at the position of each saddle. For this reason, the horizontal component force of the back direction acts on the frame of the abutment 2 at three points to prevent excessive force from being concentrated on the frame of the abutment 2.

  Next, the construction procedure of the reinforcing method according to this embodiment will be described. Also in the present embodiment, a method for reinforcing an existing bridge will be described as in the case described in the first embodiment.

  In the reinforcing method according to the present embodiment, when the bridge 1 is reinforced, the fixing plates 5 are first installed on the facing slopes, and the second cable 7B is spanned between the installed fixing plates 5. Next, one end of the first cable 7A is attached and fixed to the fixing plate 5 on one side of the facing frame. In addition, a planar protection saddle 31 and a corner protection saddle 32 are attached to the center and both ends of the abutment 2 where the first cable 7A is wound on the surface side of the abutment 2, respectively.

  Subsequently, the first cable 7 </ b> A is wound around the surface side of the abutment 2. At this time, the first cable 7A is pressed against the planar protection saddle 31 and the corner protection saddle 32 provided on the surface side of the abutment 2 by pulling the other end of the first cable 7A. Then, the other end portion of the first cable 7A is attached and fixed to the fixing plate 5 on the other side of the facing frame. Thereafter, a third cable 7 </ b> C is provided for the fixing plate 5 provided on the slope of the bank 3. Depending on the ground conditions, the third cable 7 </ b> C may be provided on the fixing plate 5 provided on the slope of the first embankment 3. In this way, the reinforcement of the bridge 1 is completed. In addition to the reinforcement of the bridge 1, the embankment 3 is also reinforced.

  As described above, in the reinforcing method according to the present embodiment, the first cable 7A is wound around the abutment 2, thereby integrating the abutment 2, the fixing plate 5, and the embankment 3 between them. For this reason, since it is not necessary to form a through hole for allowing the first cable 7A to pass through the abutment 2, it is possible to easily reinforce the abutment 2 and the embankment 3 accordingly. In particular, aging concrete bridge girders can minimize damage to the frame. Furthermore, when the cable is loosened or damaged, the cable can be easily re-tensioned or replaced.

  In the present embodiment, the first cable 7A is wound from the outside of the embankment 3 and arranged along the slope of the embankment, but after the first cable 7A is wound, the surface of the embankment is expanded. The first cable 7A may be covered with the expanded embankment.

  Subsequently, a third embodiment of the present invention will be described. The abutment according to the present embodiment and the embankment reinforcement method provided on the back of the abutment are mainly different from the first embodiment in the manner of attaching the tip of the first cable 7A. FIG. 6 is a sectional side view of a main part of a bridge including an abutment on which reinforcement according to the third embodiment is performed.

  In the first embodiment, one end of the first cable 7A is fixed to the abutment 2, whereas in this embodiment, one end of the first cable 7A is the main girder as shown in FIG. 4 is fixed. The first cable 7 </ b> A fixed to the main girder 4 enters the embankment 3 through a through hole formed in the vicinity of the upper end of the abutment 2.

  Next, the construction procedure of the reinforcing method according to this embodiment will be described. Also in the present embodiment, a method for reinforcing an existing bridge will be described as in the case described in the first embodiment.

  In the reinforcing method according to the present embodiment, when the bridge 1 is reinforced, first, the fixing plates 5 are set on the facing slopes, and the second cable 7B is bridged between the installed fixing plates 5. Next, a through hole is formed in the abutment 2 at a position through which the first cable 7A passes. Subsequently, one end of the first cable 7 </ b> A is fixed to the fixing portion Y installed at the end of the main beam 4. The fixing portion Y is fixed to the girders by welding or bolts. Thus, one end of the first cable 7A is rigidly connected.

  Then, the first cable 7 </ b> A is passed through the through hole formed in the abutment 2 and the first cable 7 </ b> A enters the embankment 3. Thereafter, the other end of the first cable 7A is advanced from the slope of the embankment 3 and fixed and fixed to the fixing plate 5. Thereafter, a third cable 7 </ b> C is provided for the fixing plate 5 provided on the slope of the bank 3. Depending on the ground conditions, the third cable 7 </ b> C may be provided on the fixing plate 5 provided on the slope of the first embankment 3. In this way, the reinforcement of the bridge 1 is completed. In addition to the reinforcement of the bridge 1, the embankment 3 is also reinforced.

  As described above, in the reinforcing method according to the present embodiment, the first cable 7A is fixed to the main beam 4. For this reason, reinforcement of the fixing member 8 when fixing the first cable 7A to the abutment housing 11 or the abutment housing 11 can be made unnecessary. Further, since the main girder 4 is made of steel, the fixing portion of the first cable 7A can be installed by welding or bolt joining, so that the fixing operation of the first cable 7A can be simplified. Here, since a temperature expansion / contraction displacement occurs in the main beam 4, the distance from the fixing portion to the main beam 4 and the fixing plate 5 in the first cable 7A also expands and contracts. In this respect, since the free length of the first cable 7A becomes longer, the temperature expansion / contraction displacement of the main beam 4 can be absorbed.

  Furthermore, a fourth embodiment of the present invention will be described. The abutment according to the present embodiment and the embankment reinforcement method provided on the back of the abutment are mainly different from the first embodiment in the manner of attaching the tip of the first cable 7A. FIG. 7 is a sectional side view of a main part of a bridge including an abutment in which reinforcement according to the fourth embodiment is performed, and FIG. 8 is an enlarged side view of a position where a stopper is provided in the cable.

  As shown in FIG. 7, in the present embodiment, both ends of the bridge 1 are supported by the first abutment 2A and the second abutment 2B, respectively, and the back surfaces of the first abutment 2A and the second abutment 2B are respectively 1 embankment 3A and 2nd embankment 3B are formed. Here, one end of the first cable 7A is fixed to a frame provided on the first embankment 3A, and the other end of the first cable 7A is located on the opposite side of the first embankment 3A with the bridge 1 in between. To be fixed to the frame provided in the second embankment 3B.

  The first cable 7A is disposed along the main beam 4 between the first bank 3A and the second bank 3B. Here, the first cable 7 </ b> A is fixed to the main beam 4 by the fixing member 41 at approximately the center in the longitudinal direction of the main beam 4. The fixing member 41 prevents the first cable 7A from separating from the main beam 4.

  Further, at both ends of the main beam 4, saddles 44 and 44 are interposed between the first cable 7A and the main beam 4, respectively. Since the saddles 44 and 44 are interposed between the first cable 7A and the main beam 4, the first cable 7A is prevented from being cut by friction caused by contact with the main beam 4.

  Furthermore, the first abutment 2A and the second abutment 2B are formed with through holes through which the first cable 7A penetrates, as in the third embodiment, and the through holes shown in FIG. A stopper 40 is provided. The idler stopper 40 includes fixing members 45 and 45 that are fixed to the first cable 7 </ b> A, and a stopper main body 42 is interposed between the fixing members 45 and 45. The first cable 7 </ b> A is attached through the fixing members 45, 45 and the stopper main body 42. The clearance in the stopper 40 with clearance here is assumed to be the displacement when an L2 earthquake (level 2 earthquake) occurs.

  The fixing members 45, 45 and the stopper main body 42 are accommodated in stopper accommodating portions 43 formed on the first abutment 2A and the second abutment 2B, respectively. When the stopper main body 42 moves in the length direction by the expansion and contraction of the first cable 7A, the stopper main body 42 comes into contact with the stopper accommodating portion 43 to prevent the stopper main body 42 from moving. ing.

  Next, the construction procedure of the reinforcing method according to this embodiment will be described. Also in the present embodiment, a method for reinforcing an existing bridge will be described as in the case described in the first embodiment.

  In the reinforcing method according to the present embodiment, first, the fixing plates 5 are set on the facing slopes of the first embankment 3A and the second embankment 3B, respectively, and the second cable 7B is connected between the installed fixing plates 5. Hang over. Next, a through hole is formed at a position where the first cable 7A passes through the first abutment 2A and the second abutment 2B. At this time, a stopper accommodating portion 43 is formed in the through hole, and the fixing member 45 and the stopper main body 42 are accommodated in the stopper accommodating portion 43.

  Next, the first cable 7A is passed through the through holes of the first abutment 2A and the second abutment 2B from the main beam 4 side. At this time, in the stopper accommodating portion 43, the stopper main body 42 is fixed to the first cable 7A by the fixing members 45 and 45 by allowing the first cable 7A to pass through the fixing members 45 and 45 and the stopper main body 42.

  Then, one end of the first cable 7A is passed through the second bank 3B formed on the back surface of the second abutment 2B, and fixed to the fixing plate 5 provided on the slope of the second bank 3B. Subsequently, the other end side of the first cable 7A is passed through the first embankment 3A formed on the back surface of the first abutment 2A.

  Thereafter, the first cable 7A is pulled and then fixed on the fixing plate 5 provided on the slope of the first bank 3A. The first cable 7 </ b> A is fixed to the main beam 4 by the fixing member 8 at a substantially central position in the longitudinal direction of the main beam 4. Then, the 3rd cable 7C is provided with respect to the fixing board 5 provided in the slope of the 1st embankment 3A and the 2nd embankment 3B. Depending on the ground conditions, the third cable 7 </ b> C may be provided on the fixing plate 5 provided on the slope of the first embankment 3. In this way, the reinforcement of the bridge 1 is completed. In addition to the reinforcement of the bridge 1, the embankment 3 is also reinforced.

  Thus, in the reinforcing method according to the present embodiment, the first embankment 3A and the second embankment on the back surfaces of the first abutment 2A and the second abutment 2B provided via the main girder 4 when the first cable 7A is attached. It is fixed on the fixing plate 5 provided on the embankment 3B. For this reason, since it is not necessary to fix the first cable 7A to the abutment 2, the fixing work of the first cable 7A can be simplified. Moreover, it is possible to prevent the anchor tension from being applied to the abutment housing 11 in the first abutment 2A and the second abutment 2B during normal times.

  Moreover, in the reinforcing method according to the present embodiment, a play-off stopper 40 is provided. For this reason, with respect to the expansion and contraction of the bridge girder due to the constant temperature change, the deformation of the first abutment 2A and the second abutment 2B can be easily suppressed in a large deformation at the time of an earthquake without causing fluctuations in the cable tension.

  Here, as in the third embodiment, the main girder 4 undergoes temperature expansion / contraction displacement, so the distance from the fixing portion to the main girder 4 and the fixing plate 5 in the first cable 7A also expands and contracts. . In this respect, since the free length of the first cable 7A becomes longer, the temperature expansion / contraction displacement of the main beam 4 can be absorbed.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment. For example, in each of the above-described embodiments, a so-called method frame method using a frame is used as a method for protecting the slope of the embankment 3, but other surface protection methods can also be used.

  Moreover, in the said embodiment, although the fixing plates 5 provided in each of the facing slopes in the embankment 3 are connected by the 2nd cable 7B, it is set as the aspect which does not provide this 2nd cable 7B. You can also. Furthermore, it can be set as the aspect which is not attached also about the 3rd cable 7C which faced the outer direction of the embankment 3. FIG. Moreover, in the said embodiment, although applied to the reinforcement about the bridge between single diameters, it is also applicable to the reinforcement about the bridge between many diameters.

It is a principal part top view of a bridge provided with the abutment in which reinforcement which concerns on 1st Embodiment is performed. It is the II-II sectional view taken on the line of FIG. It is the III-III sectional view taken on the line of FIG. (A) is a sectional side view of a slope provided with a frame, and (b) is a plan view thereof. It is a principal part top view of a bridge provided with the abutment in which reinforcement which concerns on 2nd Embodiment is performed. It is a principal part top view of a bridge provided with the abutment in which reinforcement which concerns on 3rd Embodiment is performed. It is a principal part top view of a bridge provided with the abutment in which reinforcement which concerns on 4th Embodiment is performed. It is an enlarged side view of the position where the stopper in the cable is provided.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Bridge 2 ... Abutment 3 ... Embankment 4 ... Main girder 5 ... Fixing board 6 ... Shifting 7A ... 1st cable 7B ... 2nd cable 7C ... 3rd cable 8 ... Fixing member 9 ... Mounting member 9A ... Angle adjustment base 9A
9B ... Supporting plate 9B
DESCRIPTION OF SYMBOLS 11 ... Abutment frame 12 ... Wing wall 13 ... Abutment foundation 31 ... Planar protection saddle 32 ... Corner protection saddle 34 ... Saddle 40 ... Spare stopper 41 ... Fixing member 42 ... Stopper main body 43 ... Stopper accommodating part 44 ... Saddle 45 ... Fixing member Y ... Fixing part

Claims (8)

A method of reinforcing the abutment in a bridge provided with an abutment provided with embankment on the back surface and a bridge girder whose end is supported by the abutment and the embankment provided on the back surface,
The bank is provided with a bank reinforcement member that reinforces the bank,
The abutment and the embankment reinforcing member are integrated, and the abutment and a method of reinforcing the embankment provided on the back surface thereof. The embankment reinforcing member is provided on the slope of the embankment;
The abutment according to claim 1, wherein the abutment and the embankment reinforcing member are integrated by connecting the abutment and the embankment reinforcing member with a cable. Through the cable after penetrating the cable from the surface side of the abutment to the back side of the abutment,
The abutment of Claim 2 which connects the other end part of the said cable, and the said embankment reinforcement member, and the reinforcement method of the embankment provided in the back surface. The cable is wound from the surface side of the abutment to the side surface of the abutment, and is arranged along the slope of the embankment,
The reinforcement method of the embankment provided in the abutment of Claim 2 or Claim 3 and the back surface which connects the other end part of the said cable, and the said embankment reinforcement member.   The abutment according to claim 2 or 3, wherein one end of the cable is attached to one end of the bridge girder, and a method for reinforcing a bank provided on the back surface thereof. The abutments are provided as first and second abutments at both ends of the bridge beam,
Arranging the cable along the bridge girder,
One end of the cable is passed through the first abutment and connected to the embankment reinforcing member in the embankment provided on the back surface of the first abutment,
The other end of the cable is passed through the second abutment and connected to the embankment reinforcing member in the embankment provided on the back surface of the second abutment, provided on the back surface of the first abutment and the first abutment. The abutment according to claim 2 or 3, wherein the embankment is integrated with the embankment provided on the back surface of the second abutment and the embankment provided on the back surface thereof. Reinforcement method.   The abutment according to claim 5 or 6, wherein the cable abutment is provided on at least one of the cable penetration portion of the first abutment and the cable penetration portion of the second abutment, and the embankment provided on the back thereof. Reinforcement method.   The abutment according to any one of claims 1 to 7, wherein a reinforcing cable is provided to couple the embankment reinforcing member and the ground located below or on the side of the embankment. Reinforcement method of embankment provided in the.

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