JP4190334B2 - Repair structure and repair method to repair a function-separated type support device using the base plate of the existing elastic support device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an existing elastic bearing device for an elevated bridge or bridge, a load support portion that supports the vertical load of the upper structure, and a horizontal buffer that does not support the vertical load of the upper structure. The present invention relates to a repair structure and a repair method for an existing elastic bearing device that uses a base plate of an existing elastic bearing device that is remodeled to be a horizontal force buffer device. In particular, the present invention relates to a repair structure and a repair method for an existing elastic bearing device in which a base plate of an existing elastic bearing device of type B is used and changed to a function-separated elastic bearing device.
[0002]
[Prior art]
In general, as shown in FIGS. 19 and 20, when an upper structure 53 in an elevated road bridge or bridge is supported by a type B elastic bearing device designed by the holding strength method, a main girder 47 made of H-section steel is used. It is supported by an elastic bearing device 57 having an elastic layer such as rubber disposed in the lower part of the rubber.
[0003]
For example, as shown in FIG. 20, the existing elastic support device 57 includes an elastic layer 59 such as rubber that is integrally fixed between the base plate 1 and the sole plate 58, and is elastic. An upper steel plate 60 and a lower steel plate 61 are embedded and fixed in the layer 59, and a plurality of steel plates 62 are disposed in the elastic layer 59 in parallel with a space in the vertical direction between the steel plates 60, 61. A cylindrical lead member 63 is disposed so as to penetrate through each of the pressure proof steel plates 62 and the elastic layer 59 so as to be embedded and arranged to be pressure reinforced and to be locked in the recesses of the upper steel plate 60 and the lower steel plate 61. .
[0004]
A mounting steel plate 64 attached to the lower steel plate 61 with a bolt is fixed to a female screw sleeve 67 fixed to the lower portion of the base plate 1 by welding with a bolt 65, and the upper steel plate 60 or The steel plate for attachment is interposed, and it is fixed to the lower flange 50 of the main girder 47 by a bolt 66 and integrated.
[0005]
The upper part of the anchor bolt 68 embedded and fixed in the lower structure 48 is screwed into the female screw sleeve 67 at the lower part of the base plate 1 and fixed by welding. The bolt 65 is inserted into the through hole of the base plate 1 and The lower structure 1 is fixed by being screwed into the female screw sleeve 67.
As described above, when the upper structure 53 is supported by the elastic bearing device 57 having the elastic layer 59 such as rubber disposed under the steel main girder 47 (see, for example, Patent Document 1), The elastic bearing device 57 is a rubber bearing that responds to large earthquakes up to its holding strength, so the rubber bearing thickness is thick and the rigidity in the horizontal direction is relatively small. There is a problem that the horizontal displacement becomes relatively large, and the upper structure 53 is shaken.
[0006]
[Patent Document 1]
JP-A-8-21484
[0007]
[Problems to be solved by the invention]
In order to prevent the upper structure from being constantly shaken by the live load such as the wheel load, the present invention leaves the base plate of the existing elastic support device, and always applies the vertical load of the upper structure to the sliding elastic. A horizontal buffer (horizontal force buffering support device) that supports the horizontal structure and the lifting force of the upper structure during an earthquake to the lower structure is provided, and has two functions on the existing base plate. By carrying out repairs that change to a function-separated type support device, the sliding (elastic) support device can prevent the swing of the superstructure due to traffic vibration caused by the wheel load of the truck, etc. The entire reaction force of the superstructure can be supported by the device, and the horizontal force and the lifting force can be supported by the horizontal buffer (horizontal force buffer support device) to share the functions of each support device. And to provide a repair structure and repair method of the existing elastic bearing device for changing repairing function separation type elastic bearing device that.
[0008]
[Means for Solving the Problems]
In order to solve the above problem, in the repair structure of the existing elastic bearing device using the base plate of the existing elastic bearing device according to claim 1, the existing elasticity arranged between the lower structure and the upper structure. Using a part of the support device, the function is separated into a load support part that supports the vertical load of the upper structure and a buffer part that transmits the lifting force and horizontal force of the upper structure to the lower structure. In the repair structure of an existing elastic bearing device that is repaired to a separate function-equipped bearing device, the existing base plate fixed to the lower structure in the existing elastic bearing device is left, and the sliding upper plate is placed on the existing base plate. A steel lower support member having a pair of side support members for restricting the movement in the direction perpendicular to the bridge axis of the steel is placed and fixed. A shear deformation restraining member having a hole penetrating in the vertical direction for receiving the support is fixed, and a sliding load supporting elastic support body for supporting the vertical load of the upper structure is installed in the shear deformation restraining member. The elastic layer for the sliding load bearing is configured so that the elastic layer does not undergo shear deformation, and a horizontal buffer is disposed on the upper surface of the side of the lower steel support member, one end of which is fixed, and the horizontal The other end side of the buffer is fixed to the main beam side.
[0009]
Further, in the invention of claim 2, in the repair structure of the existing elastic support device using the base plate of the existing elastic support device according to claim 1, the steel lower support member is fixed to the existing base plate by welding, A shear deformation restraining member is detachably fixed to the steel lower support member with a bolt, and an upper portion of the sliding load bearing elastic support body is placed in a space formed by the steel lower support member and the shear deformation restraint and support member. It is arranged to be detachable so as to protrude.
[0010]
Furthermore, in the invention of claim 3, in the repair structure of the existing elastic bearing device using the base plate of the existing elastic bearing device according to claim 1 or 2, the upper structure of the horizontal buffer is connected to the main girder. A sole plate that extends in a direction perpendicular to the bridge axis is fixed, an upper portion of a horizontal buffer is attached to the sole plate, and an upper lift stop member is disposed and integrated over the main beam and the sole plate. Features.
[0011]
In the repair method for an existing elastic bearing device using the base plate of the existing elastic bearing device according to claim 4, a part of the existing elastic bearing device arranged between the lower structure and the upper structure is used. Then, a repair method for repairing to a function-separated type support device comprising a load support portion for supporting the vertical load of the upper structure and a buffer portion for transmitting the lifting force and horizontal force of the upper structure to the lower structure. In step (1), after removing the upper part of the support device on the existing base plate without removing the base plate in the existing elastic support device installed in the lower structure in a state where the upper structure is jacked up by the jack, A steel lower support member having a pair of side support members for restricting the movement of the sliding upper bridge in the direction perpendicular to the bridge axis is fixed on the base plate of the A shear deformation restraining member is detachably fixed to the steel lower support member, a sliding load supporting elastic support body for supporting the vertical load of the upper structure is installed in the shear deformation restraining member, and the steel A horizontal buffer that does not support the vertical load of the upper structure is disposed on the upper surface of the side portion of the lower support member, one end side thereof is fixed, and the other end side of the horizontal buffer is fixed to the main girder side. .
[0012]
According to the present invention, by using a base plate of an existing elastic bearing device, a sliding-type elastic bearing can be installed on the base plate, and the upper structure can be prevented from constantly shaking due to a live load such as a wheel load. At the same time, it is repaired by separating and changing the function into two functions: a horizontal buffer (horizontal force and lifting force buffer bearing device) that transmits the horizontal force and lifting force during an earthquake without bearing the vertical load of the superstructure. Can be performed.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Next, the present invention will be described in detail with reference to the illustrated embodiments.
First, components used in the function-separated elastic bearing device of the present invention will be described. FIG. 9 shows a steel lower support member 2 installed on an existing base plate 1, wherein (a) is a plan view of the steel lower support member, and (b) is a partially longitudinal front view of (a). It is.
[0014]
The steel lower support member 2 is a member that becomes a new bed plate whose peripheral portion is fixed to the existing base plate 1 by welding, and is perpendicular to the bridge axis direction at the center of the bridge axis direction on the steel plate base plate 3. Are provided with locking recesses 4 for fitting and locking the lower locking projections of the horizontal buffer, which will be described later, at both ends (positions away from both end surfaces), and the direction perpendicular to the bridge axis From the center, the side support member 5 is erected so as to extend in the direction perpendicular to the bridge axis in parallel and at an interval in the direction of the bridge axis, and its lower part is fixed by welding. The side support member 5 is a member for restricting the movement of the upper rod 18 in the direction perpendicular to the bridge axis, and is configured to allow the upper rod 18 to move in the bridge axis direction.
[0015]
Further, a plurality of female screw holes 6 for attaching horizontal buffers are provided on the upper surfaces of both ends in the bridge axis direction of the steel plate base plate 3 on both ends in the direction perpendicular to the bridge axis and spaced in the direction perpendicular to the bridge axis. A plurality of female screw holes 7 are provided between the female screw holes 6 at both ends in the direction perpendicular to the bridge axis at intervals in the direction perpendicular to the bridge axis. The female screw hole 7 is a female screw hole 7 for attaching a shear deformation restraining member 8 described later.
[0016]
FIG. 10 shows a shear deformation restraining member 8 mounted on the central portion of the lower steel support member 2 and fixed to the female screw hole 7 with a bolt, wherein (a) is a plan view, (b) ) Is a longitudinal front view of (a).
[0017]
The shear deformation restraining member 8 is made of, for example, a steel material, and mounting flanges 9 projecting in the bridge axis direction are provided at lower portions of both ends of the shear deformation restraining member main body in the bridge axis direction. A plurality of bolt insertion holes 10 are provided at intervals in the direction perpendicular to the bridge axis. Further, a circular hole 11 penetrating in the vertical direction is provided at the center of the shear deformation restraining member 8. The circular hole 11 passing therethrough is a relatively large-diameter circular hole 11 for accommodating a load-supporting elastic support body 12 described later for supporting the vertical load of the superstructure in the inside thereof. The height in the vertical direction of the deformation restraining member 8 is set slightly lower than the height of the load supporting elastic support 12, and the shear deformation restraining member 8 does not support the vertical load of the upper structure. .
[0018]
A vertical wall 13 in the inner circumferential direction of the circular hole 11 passing through the central portion of the shear deformation restraining member 12 is a high bearing elastic bearing 12 as a load supporting elastic bearing 12 shown in FIG. In this case, the elastic deformation of the elastic layer 15 is restricted by restraining the shear deformation of the male layer 15 such as rubber in the high bearing elastic support body 12 indirectly. Is configured to bear only the load in the vertical direction.
[0019]
The inner circumferential vertical wall surface 13 having a circular cross section of the shear deformation restraining member 8 is set to have a similar shape slightly larger than the upper steel member 14 in the load supporting elastic support 12 and is formed in a circular shape. . On the inner peripheral vertical wall surface 13 of the shear deformation restraining member 12, a low-friction sliding bearing surface made of a Teflon (registered trademark) layer (ethylene tetrafluoride layer), a tetrafluoroethylene plate or a layer is appropriately formed. .
[0020]
Further, the height dimension of the shear deformation restraining member 8 is located at an intermediate portion (substantially central portion) of the thickness of the upper steel member 14 in the high support pressure elastic support body 12 as the load supporting elastic support body 12. The height dimension is configured as described above, and the upper steel member 14 is allowed to move in the vertical direction in the high bearing elastic bearing 12 and the lateral movement of the upper steel member 14 is restricted. ing.
[0021]
The lower surface of the shear deformation restraining member 8 around the circular hole 11 is provided with a continuous draining groove 16 at the center in the bridge axis direction and having a downward opening extending in a direction perpendicular to the bridge axis. Water such as rainwater that has entered the circular hole 11 by the draft groove 16 is discharged out of the shear deformation restraining member 8.
[0022]
FIG. 11 shows the load-supporting elastic support body 12, wherein (a) is a plan view and (b) is a front view. The configuration of the high bearing elastic bearing body 12 will be described. The high bearing elastic bearing body 12 prevents the elastic layer 15 from undergoing shear deformation and causes the elastic layer 15 to bear only a vertical load. By doing so, the thickness of the elastic layer can be reduced, whereby the height dimension of the entire elastic support can be kept low, and the elastic layer 15 can be used with a high bearing pressure. A lower steel member 17 having a circular bottom shape and a substantially concave shape in cross section, an upper steel member 14 having a substantially circular shape and a substantially reverse concave cross section, and the steel members 17 and 14. And a removable high exchange pressure bearing having a rubber-like elastic body (layer) 15 which is fitted between these recesses and is integrally fixed by bonding or baking or integral molding. Body 12 and this high bearing pressure A sexual support body 12 is detachably fitted into the circular hole 11 of the shear deformation restraining and supporting member 8, and the lower steel member 17 and the upper steel member 14 are relative to each other by the inner peripheral vertical wall surface of the vertical wall surface 13. The elastic body (layer) 15 is subjected to shear deformation due to the relative lateral displacement of the upper and lower end portions of the elastic body (layer) 15 such as rubber in the high bearing elastic support body 12 while restraining the horizontal movement. It is indirectly restrained. Therefore, the high bearing elastic support 12 is prevented from laterally moving in the direction perpendicular to the bridge axis, the direction of the bridge axis, and the like, and the upper steel member 14 is viewed from above with respect to the shear deformation restraining and supporting member 8. It is provided so as to be slidable in the vertical direction by changing the compression force.
[0023]
A circular fitting recess is provided on the upper surface of the upper steel member 14, and a sliding member 40 such as an ethylene tetrafluoride plate or an ethylene tetrafluoride layer is fitted and locked in the fitting recess. At the same time, it is fixed by an adhesive or the like, or a sliding member 40 such as a stainless steel plate is fixed to the upper surface of the upper steel member 14 by screws or the like. Since an inward annular recess is formed on the outer peripheral surface of the intermediate portion of the elastic layer (body) 15, a deformation-allowing space 19 of the elastic layer 15 can be formed, and stress is concentrated on the outer peripheral edge of the rubber layer. It is configured to be relaxed.
[0024]
Further, the load bearing elastic bearing body 12 is arranged so that an intermediate portion of the outer surface of the upper steel member 14 is brought close to or in contact with an upper portion of the circular hole 11 of the shear restraining member 12, and the steel The upper surface level around the circular hole 11 passing through the shear restraining member 8 is set so as to be located at the middle part of the plate thickness of the upper steel member 14 (in the illustrated case, the level at the central part of the plate thickness). ing. With such a configuration, even if the upper steel member 14 tilts (rotates) to some extent due to the deflection of the upper structure including the main girder, it can be supported while absorbing it.
[0025]
FIG. 12 shows a horizontal buffer 19 connected to the steel lower support member 2 and the upper structure side, where (a) is a side view, (b) is a plan view, and (c) is a front view. (D) is a longitudinal front view showing a part of (a) in an enlarged manner.
[0026]
The horizontal buffer 19 includes a rectangular upper steel plate 20 that is long in the bridge axis direction, a rectangular lower steel plate 21 that is long in the bridge axis direction, and an intermediate molding that is interposed therebetween. It is fixed and has a rectangular parallelepiped rubber-like elastic layer 22 so as to extend in the bridge axis direction except for the mounting flanges 23 and 24 at the ends in the bridge axis direction of the upper and lower steel plates 20 and 21. . As shown in FIG. 12 (d), a reinforcing plate 27 such as a steel plate is embedded in the elastic layer 26 at an interval in the vertical direction in parallel with the upper steel plate 20 and the lower steel plate 21. In addition, a cylindrical convex portion 22 that protrudes upward is integrally provided at the center of the upper surface of the upper steel plate 20, and the mounting flange 23 at the end of the upper steel plate 20 is spaced apart in the direction perpendicular to the bridge axis. A plurality of female screw holes 23a are provided.
[0027]
A columnar convex portion 25 that protrudes downward is integrally provided at the center of the lower surface of the lower steel plate 21, and the mounting flange 24 at the end of the lower steel plate 21 is spaced apart in the direction perpendicular to the bridge axis. A plurality of bolt insertion holes 24a are provided.
[0028]
The horizontal buffer 19 is placed at both ends of the steel lower support member 2 in the direction perpendicular to the bridge axis, and the mounting flange 24 at the end of the lower steel plate 21 is inserted into the bolt insertion hole 24a and the steel. The convex portion 25 integrated with the lower steel plate 21 is fitted and locked to the locking concave portion 4 in the lower steel support member 2 and fixed to the female screw hole 6 of the lower support member 2 by a bolt. The shearing force is transmitted so that the lower steel plate 21 and the steel lower support member 2 are integrated vertically and laterally.
[0029]
The mounting flange 23 at the end of the upper steel plate 20 is screwed into the female screw hole 23a, and is disposed on the upper surface of the lower flange of the main girder described later and fixed below the upper lifting force stop member and the main girder. A steel sole plate disposed on the lower surface of the flange and fixed thereto, and a bolt inserted into a steel adjustment plate disposed therebetween, are fixed by bolts, and the convex portion 22 of the upper steel plate 20 is engaged with the steel sole plate. The upper and lower steel plates 20 and the sole plate are integrated in the vertical and horizontal directions by being fitted and locked in the stopper recesses to transmit a shearing force.
[0030]
FIG. 13 shows an example of the steel sole plate 28 used in the present invention, where (a) is a plan view and (b) is a side view. On the lower surface side of the flat rectangular steel sole plate 28, the convex portion 22 of the upper steel plate 20 in the horizontal buffer 19 is fitted and locked to the end portion side in the bridge axis direction at the center portion in the direction perpendicular to the bridge axis. A concave recess 29 for downward opening is provided, and a relatively large-diameter through-hole 30 for fitting and arranging a steel cylindrical shear key is provided in the central portion in the bridge axis direction. A plurality of (8 in the illustrated example) penetrating bolt insertion holes 31 that are spaced apart in the direction of the bridge axis and spaced in the direction perpendicular to the bridge axis are provided on the center side in the bridge axis direction around the through hole 30. Is provided. Also, a plurality of bolt insertion holes 32 are provided at both ends in the direction perpendicular to the bridge axis at both ends in the bridge axis direction with a gap in the bridge axis direction.
[0031]
FIGS. 14A and 14B show the upper lifting force stopping member 33 arranged and fixed on the upper surface of the lower flange of the main girder. FIG. 14A is a plan view and FIG. 14B is a front view. This upper lift stop member 33 has reinforcing vertical ribs 35 on the upper surface of a flat L-shaped steel plate 34 composed of a base end side mounting portion extending in the bridge axis direction and an upper lift stop portion extending in the direction perpendicular to the bridge axis. A plurality of bolt insertion holes 36 are provided on the base end side of the L-shaped steel plate 34 at intervals in the bridge axis direction, and are spaced apart in the direction perpendicular to the bridge axis at the distal end side. A plurality of bolt insertion holes 37 are provided. As shown in FIG. 3, the upper lift stop member 33 is an L-shaped steel plate 34 so as to avoid the flange portion of the intermediate cross girder attached to the main girder. A pair of upper lifting force stop members 34 symmetrically configured with respect to the center line in the direction perpendicular to the bridge axis are disposed on both sides of the steel main girder in the direction perpendicular to the bridge axis.
[0032]
15A and 15B show the adjustment plate 38, where FIG. 15A is a plan view and FIG. 15B is a front view. The adjustment plate 38 is constituted by a rectangular steel plate having a thickness approximately equal to the thickness of the lower flange of the steel main girder, and is superposed on the tip side of the steel L-shaped steel plate 34. A plurality of bolt insertion holes 39 are provided at the distal end portion on one long side of the adjustment plate 38 at intervals in the longitudinal direction of the member. The bolt hole 39 is provided at a position where it is overlapped with a plurality of bolt insertion holes 37 provided at the tip of the L-shaped steel plate 34.
[0033]
FIGS. 16A and 16B show a sliding upper rod 18 mounted on the load bearing elastic bearing body 12 and capable of sliding in the bridge axis direction, wherein FIG. 16A is a plan view and FIG. 16B is a front view. FIG. 3C is a side view. The sliding upper bar 18 is integrally provided with a columnar convex portion 41 at the center of a steel rectangular steel plate so as to protrude upward. The convex portion 41 is fitted into the through hole 30 of the steel sole plate 38 and is fitted into a through hole of the position adjusting plate 43 to be described later, so that the slide type upper rod 18, the sole plate 38, and the position adjustment are fitted. This is a shear key for integration with the plate in the lateral direction. Further, a plurality of (eight in the illustrated example) female screw holes 42 are provided at intervals in the member longitudinal direction (bridge axis direction) of the sliding upper collar 18 and at intervals in the direction perpendicular to the bridge axis. .
[0034]
The female screw hole 42 is provided at a position that matches the bolt insertion hole 31 provided in the steel sole plate 28 and at a position that also matches a bolt insertion hole provided in a position adjusting plate described later. . In addition, a rectangular stainless steel plate 46 is fixed to the lower surface of the sliding type upper rod 18 and both ends in the bridge axis direction with an adhesive or a screw to form a sliding surface.
[0035]
FIG. 17 shows a position adjusting plate 43 for adjusting the position of the sole plate 28 when it is attached to a steel main girder, wherein (a) is a plan view and (b) is a front view. . The position adjusting plate 43 is formed of a rectangular steel plate, and a through hole 44 for fitting the convex portion 41 of the sliding upper rod 18 is provided in the center portion thereof, and the longitudinal direction of the member (bridge) A plurality of bolt insertion holes 45 are provided at intervals in the axial direction) and at intervals in the direction perpendicular to the bridge axis. The position where the bolt insertion hole 45 is provided is provided at a position matching the bolt insertion hole 31 in the sole plate 28 and the female screw hole 42 of the sliding type upper collar 18.
[0036]
Next, a procedure for repairing the existing elastic bearing device shown in FIG. 19 to the function-separated elastic bearing device shown in FIGS. 1 to 3 using the above-described members will be described.
[0037]
From the state of FIG. 19, the set bolt on the side of the main girder 47 to which the existing elastic support body is attached is removed, and the main girder 47 is jacked up by the jack 49 installed on the lower structure 48, and the existing elastic support body and upper The upper collar etc. which are attached to the collar removably are removed, and it is set as the transverse plane state shown in FIG. 18, and the longitudinal front state in this state becomes the state shown in FIG. Hereinafter, description will be made in order from the state of FIG.
[0038]
Next, the steel lower support member 2 shown in FIG. 9 is carried in from the bridge axis direction or the direction perpendicular to the bridge axis, and is placed on the existing base plate 1, and the side peripheral edge of the steel lower support member 2 is steel on request. It fixes to the manufacturing lower support member 2, and makes it the state shown in FIG.
[0039]
Next, as shown in FIG. 7, the shear deformation restraining member 8 shown in FIG. 10 is installed in the center of the steel lower support member 2 from the bridge axis direction or the like, and is inserted into the bolt insertion hole 10 of the shear deformation restraining member 8. At the same time, the shear deformation restraining member 8 is fixed to the steel lower support member 2 by a bolt 69 screwed into the female screw hole 7 of the steel lower support member 2.
[0040]
Next, the elastic support 12 shown in FIG. 11 is fitted and disposed in the shear deformation restraining member 8, and the horizontal buffers 19 shown in FIG. 12 are carried on both sides of the steel lower support member 2 in the direction perpendicular to the bridge axis. The convex portion 25 of the horizontal buffer 19 is fitted and locked to the locking concave portion 4 of the steel lower support member 2 and is inserted into the bolt insertion hole 24a of the horizontal buffer 19 and the female screw of the lower support member 2 The lower part of the horizontal buffer 19 is fixed to the lower support member 2 by bolts 70 screwed into the holes 6.
[0041]
Next, the member attached to the main girder 47 side will be described with reference to FIG. 8. The lower flange 50 of the main girder 47 is provided with a bolt insertion hole for fixing the existing elastic bearing device in advance. When these can be used, they are used, and when they are insufficient, bolt holes are appropriately provided.
[0042]
Next, in order to dispose the sole plate 28 shown in FIG. 13, the position adjusting plate 43 shown in FIG. 17, and the sliding upper rod 18 shown in FIG. The base is arranged on the load bearing elastic bearing body 12, the sliding upper rod 18, the position adjusting plate 43 and the sole plate 28 are sequentially arranged at predetermined positions, and the convex portion 41 of the sliding upper rod 18 is positioned. The adjustment plate 43 is fitted into the through hole 44 and the through hole 30 of the sole plate 28, and the female screw hole 42 and the bolt insertion holes 45 and 31 of these members are matched with the bolt insertion holes of the lower flange 51. As described above, the telescopic temporary support base is extended to raise these members, and the sole plate 28 is brought into contact with the lower surface of the lower flange 50.
[0043]
Further, the adjustment plates 38 shown in FIG. 15 are placed on both sides of the sole plate 28 so that these bolt insertion holes coincide with each other, and the upper lifting force shown in FIG. The stop members 33 and the four upper lift stop members 33 symmetrical to the stop members 33 are arranged, and the bolt insertion holes 36 of the upper lift stop members 33, the bolt insertion holes of the lower flange 50, and the bolt insertion holes 31 of the sole plate 28, The bolts 51 are inserted through the bolt insertion holes 45 of the position adjusting plate 43 and screwed into the female screw holes 42 of the sliding upper rod 18, and these members are attached to the main girder 47. And the said telescopic temporary support stand is removed and it is set as the state of FIG. In addition, the dimension of the sliding upper bar 18 and the position adjusting plate 43 in the direction perpendicular to the bridge axis is set slightly smaller than the dimension between the side support members 5 in the steel lower support member 2.
[0044]
Thereafter, the jack 48 supporting the main girder 47 is shortened so that the locking concave portion 29 in the steel sole plate 28 is fitted into the convex portion 22 in the horizontal buffer 19, and the bolt of the upper lift stop member 33 is inserted. The bolts 52 of the bolt insertion holes 39 of the adjustment plate 38 and the holes 37 are inserted, and the horizontal buffer 19 and the sole plate are screwed and tightened into the female screw holes 23a of the mounting flange 23 of the upper steel plate 20 in the horizontal buffer 19. 28, the adjustment plate 38, and the upper lift stop member 33 are integrated, and the state shown in FIGS.
[0045]
In the state shown in FIG. 1 to FIG. 3, the sliding upper bar 18 fixed to the main girder 47 side is provided with the upper surface of the load bearing elastic bearing body 12 arranged in the steel lower support member 2 as a sliding bearing surface. It is configured to be movable in the bridge axis direction, and is configured such that the lower side surface in the direction perpendicular to the bridge axis of the sliding upper rod 18 faces the upper surface of the opposing side support member 5 of the lower support member 2. Therefore, the movement of the main girder 47 in the direction perpendicular to the bridge axis is restrained by the side support members 5. Further, this restrains the movement of the upper structure 53 such as the road bridge deck including the main girder 47 in the direction perpendicular to the bridge axis.
[0046]
In this way, the existing elastic bearing is formed by the sliding-type elastic bearing device (load-supporting portion) by the load-type elastic bearing body 12 having the sliding-type upper rod 18 on the lower side of the main girder 47 and the sliding surface for supporting it. And a horizontal buffer portion for transmitting shear deformation type horizontal force and lifting force to the lower structure on both sides of the sliding elastic bearing device in the direction perpendicular to the bridge axis. It is a function-separated type support device in which the functions of the load support portion and the horizontal buffer portion are separated.
[0047]
In FIG. 3, reference numeral 54 denotes a cross beam made of H-shaped steel that connects the main beams 47 adjacent to each other in the direction perpendicular to the bridge axis, and is attached to the mounting vertical rib 55 fixed to the main beam 47 side by welding. A web 56 of the cross beam 54 is fixed by bolts and nuts. Further, the lower support member 2 is arranged so that the center of the load bearing elastic bearing 12 is located at the center of the intersection of the main girder 47 and the horizontal girder 54 so that the fulcrum supporting the main girder 47 does not change. It is configured.
[0048]
Further, the horizontal buffer 19 is used as a buffer bearing device that supports the horizontal force and the lifting force during an earthquake or the like while buffering and transmitting them to the lower structure 48.
[0049]
In the above-described embodiment, the new sole plate 28 and the position adjustment plate 43 are attached to the main girder 47. However, when the position adjustment plate 43 is attached to the existing elastic support device, and in the existing elastic support device. When the sole plate is a sole plate that is wide in the direction perpendicular to the bridge axis, bolt insertion holes may be appropriately provided by using these.
[0050]
Moreover, in the case of the said embodiment, although the case of the main girder 47 of H-section steel was demonstrated, when implementing this invention, as main girder 47, in addition to shape steels, such as H-section steel, a box cross-section box You may make it apply also to a digit etc.
[0051]
In the case of the above-described embodiment, the steel lower support member 2 is fixed to the steel lower support member 2 with bolts, and the steel load support elastic support 12 is accommodated in the shear deformation restraint member 8. The member 2 may be fixed to the existing base plate 1. Since the steel lower support member 2 is fixed to the existing base plate 1 by welding, processing is not required as compared to the case where the steel lower support member 2 is fixed to the existing base plate 1 with bolts.
[0052]
In the case of the above-described embodiment, since the shear deformation restraining member 8 is fixed by bolts, the main girder 47 is leveled up by a jack or the like, and the shear deformation restraining member 8 and the sliding load supporting elastic support 12 are provided. It can be replaced and further repairs are easy.
[0053]
In the above-described embodiment, the existing base plate 1 is fixed to the lower structure 48 by the internally threaded sleeve 67 and the anchor bolt 68. However, the base plate is fixed by the anchor bolt 68 or the anchor bolt 68. The present invention can also be applied to an existing elastic bearing device that is fixed by a nut and a nut.
[0054]
In the above-described embodiment, the horizontal buffer is fixed by a bolt. Therefore, when replacing, it is easy to replace the horizontal buffer by jacking up the upper structure.
[0055]
【The invention's effect】
According to the present invention, an existing elastic bearing device is repaired by providing a sliding elastic bearing device that always bears the vertical load of the superstructure and a horizontal buffer portion that bears the horizontal force and the lifting force during an earthquake. Therefore, it is possible to prevent normal vibration of the upper structure due to traffic vibration caused by the wheel load of trucks, etc., with the sliding (elastic) bearing device, and to support the total reaction force of the upper structure with the bearing device, The horizontal force buffering support device supports the horizontal force and the lifting force, and the functions of each support device can be shared. The function is simplified and the design is easy.
[0056]
In addition, if the steel lower support member is fixed to the existing base plate with bolts, the steel lower support member and the sliding elastic support can be replaced, and if there is a need for repair, the repair is easy. It is.
[0057]
In addition, since the elastic support body for sliding load support and the horizontal buffer can be placed on the steel lower support member placed within the range of the existing base plate, the function-separated support device can be made compact. Since the upper lift stop member is placed and integrated across the main girder and the sole plate, the upper lift force of the upper structure at the time of earthquake is transmitted to the lower structure without fail, and the upper structure Lifting can be prevented.
[0058]
Further, in the repair method for repairing the function-separated type support device of the present invention, the existing base plate can be used effectively, and there is no need to hang the substructure and the construction can be carried out economically. In addition, since the steel lower support member, the sliding load bearing elastic bearing body and the horizontal buffer can be arranged in the existing base plate, a compact function separation type bearing device can be easily constructed.
[Brief description of the drawings]
FIG. 1 is a longitudinal front view showing a state in which an existing elastic bearing device is repaired to a function separation type bearing device by implementing the present invention.
2 is a longitudinal side view of FIG. 1. FIG.
FIG. 3 is a cross-sectional plan view cut in the vicinity of the middle part of the beam in FIG. 1;
4 is a cross-sectional view taken along line AA in FIG.
FIG. 5 shows a construction procedure for making the function-separated elastic bearing device of the present invention, in which parts other than the base plate in the existing elastic bearing device are removed and the upper structure (girder) is jacked up. It is a partially vertical front view which shows a state.
6 shows a construction procedure for the function-separated elastic support device of the present invention, and shows a state in which a newly installed lower support member is arranged and fixed on an existing base plate from the state of FIG. FIG.
FIG. 7 shows a construction procedure for making the function-separated elastic bearing device of the present invention, and, from the state of FIG. 6, fixing a shear deformation restraining and supporting member to the central portion of the lower support member; It is a partially longitudinal front view which shows the state which has arrange | positioned the high bearing elastic body in the shear deformation restraint and support member.
FIG. 8 shows a construction procedure for the function-separated elastic bearing device of the present invention, in which a buffer is arranged at the end of the lower support member in the direction perpendicular to the bridge axis from the state of FIG. FIG. 5 is a partially longitudinal front view showing a state in which the sliding support member is attached to the lower surface of the lower flange of the girder via the sole plate and the adjustment plate, and the upper lift stop member is disposed and fixed to the upper surface of the lower flange while fixing.
FIGS. 9A and 9B show parts used in the function-separated elastic bearing device of the present invention, wherein FIG. 9A is a plan view of a lower support member installed and fixed on an existing base plate, and FIG. FIG.
10A and 10B show parts used in the function-separated elastic support device of the present invention, and FIG. 10A shows a shear deformation restraint and support member arranged and fixed on the lower support member shown in FIG. 9; A top view and (b) are longitudinal sectional front views of (a).
11A and 11B show parts used in the function-separated elastic bearing device of the present invention, and FIG. 11A is arranged in the central circular hole of the shear deformation restraining and supporting member shown in FIG. It is a top view which shows a high bearing elastic support body.
FIGS. 12A and 12B show components used in the function-separated elastic bearing device of the present invention, wherein FIG. 12A is a side view showing a buffer installed on the lower support member, and FIG. (C) is a front view, (d) is a longitudinal front view showing a part of (a) in an enlarged manner.
13A and 13B show parts used in the function-separated elastic bearing device of the present invention, in which FIG. 13A is a plan view showing a sole plate, and FIG. 13B is a side view.
14A and 14B show parts used in the function-separated elastic bearing device of the present invention, in which FIG. 14A is a plan view showing an upper lift stop member, and FIG. 14B is a front view.
FIGS. 15A and 15B show parts used in the function-separated elastic bearing device of the present invention, in which FIG. 15A is a plan view of a filler plate, and FIG. 15B is a front view.
FIGS. 16A and 16B show parts used in the function-separated elastic bearing device of the present invention, wherein FIG. 16A is a plan view showing a sliding upper collar, FIG. 16B is a front view, and FIG. It is a side view.
17A and 17B show parts used in the function-separated elastic bearing device of the present invention, in which FIG. 17A is a plan view showing an adjustment plate, and FIG. 17B is a front view.
FIG. 18 is a cross-sectional view showing the relationship between the remaining base plate and the upper structure side girders after the upper portion of the existing elastic bearing device is removed before making the function-separated type bearing device of the present invention; It is the cross-sectional top view cut | disconnected by the part vicinity.
FIG. 19 is a schematic side view showing a state in which an upper structure is supported by a conventional elastic bearing device.
FIG. 20 is an enlarged front view showing a part of a conventional elastic bearing device.
[Explanation of symbols]
1 Existing base plate
2 Steel lower support member
3 Base plate
4 Recessed recess
5 Side support members
6 Female screw holes
7 Female thread hole
8 Shear deformation restraint member
9 Mounting flange
10 Bolt insertion hole
11 Circular holes that pass through
12 Elastic bearing body for load bearing
13 Vertical wall
14 Upper steel parts
15 Elastic layer
16 Drainage groove
17 Lower steel parts
18 Slide type upper arm
19 Horizontal buffer
20 Upper steel plate
21 Lower steel plate
22 Convex
23 Mounting flange
24 Mounting flange
25 Convex
26 Elastic layer
27 Reinforcing plate
28 Steel sole plate
29 Locking recess
30 Through hole
31 Bolt insertion hole
32 Bolt insertion hole
33 Upper lift stop member
34 Planar L-shaped steel plate
35 Reinforced vertical rib
36 Bolt insertion hole
37 Bolt insertion hole
38 Adjustment plate
39 Bolt hole
40 Sliding material
41 Convex
42 Female thread hole
43 Position adjustment plate
44 Through hole
45 Bolt insertion hole
46 Stainless steel plate
47 Main girder
48 Substructure
49 Jack
50 Lower flange
51 volts
52 volts
53 Superstructure
54 Horizontal Girder
55 Vertical rib for mounting part
56 web
57 Existing elastic bearing device
58 Sole plate
59 Elastic layer
60 Upper steel plate
61 Lower steel plate
62 Steel plate
63 Cylindrical lead member
64 Steel plate for mounting
65 volts
66 volts
67 Female thread sleeve
68 Anchor bolt
69 volts
70 volts

Claims (4)

Using a part of the existing elastic bearing device arranged between the lower structure and the upper structure, a load support unit that supports the vertical load of the upper structure, and the uplift force and horizontal force of the upper structure In the repair structure of an existing elastic bearing device that repairs a function-separated type bearing device whose function is separated into a buffer part for transmitting the structure to the lower structure, the existing structure fixed to the lower structure in the existing elastic bearing device The steel lower support member having a pair of side support members for restricting the movement of the sliding upper arm in the direction perpendicular to the bridge axis is placed and fixed on the existing base plate, leaving the base plate of A shear deformation restraining member having a hole penetrating in the vertical direction for accommodating the sliding load supporting elastic support is fixed to the upper portion of the steel lower support member, and the upper structure is formed in the shear deformation restraining member. A sliding load supporting elastic support body for supporting the vertical load of the sliding load supporting elastic support body is configured so that the elastic layer in the sliding load supporting elastic support body does not undergo shear deformation, and the side portion of the steel lower support member Repair of an existing elastic bearing device using a base plate of an existing elastic bearing device, characterized in that a horizontal buffer is arranged on the upper surface, one end side thereof is fixed, and the other end side of the horizontal buffer is fixed to the main girder side. Construction. The steel lower support member is fixed to an existing base plate by welding, and a shear deformation restraining member is detachably fixed to the steel lower support member by a bolt, and is formed by the steel lower support member and the shear deformation restraining and supporting member. 2. An existing elastic bearing using a base plate of an existing elastic bearing device according to claim 1, wherein the upper part of the elastic bearing body for sliding type load bearing protrudes in the formed space so as to be detachable. Equipment repair structure. A sole plate extending in a direction perpendicular to the bridge axis for connecting the upper portion of the horizontal buffer is fixed to the main girder, and the upper portion of the horizontal buffer is attached to the sole plate, and the upper lift force over the main girder and the sole plate 3. A repair structure for an existing elastic bearing device using a base plate of the existing elastic bearing device according to claim 1 or 2, wherein a stop member is arranged and integrated. Using a part of the existing elastic bearing device arranged between the lower structure and the upper structure, a load support unit that supports the vertical load of the upper structure, and the uplift force and horizontal force of the upper structure The existing elastic bearing device installed in the lower structure while the upper structure is jacked up with a jack in the repair method of repairing the function-separated type support device with the buffer part for transmitting the water to the lower structure After removing the upper part of the support device on the existing base plate without removing the base plate at the base, a pair of side supports for restricting the movement of the sliding upper arm in the direction perpendicular to the bridge axis on the existing base plate A steel lower support member having a member is fixed, and a shear deformation restraining member is detachably fixed to the steel lower support member, and the upper structure is placed in the shear deformation restraining member. A sliding load supporting elastic support for supporting a direct load is installed, and a horizontal buffer that does not support the vertical load of the upper structure is arranged on the side upper surface of the steel lower support member, and one end side thereof is fixed. And the other end side of the horizontal buffer is being fixed to the main girder side, The repair method of the existing elastic bearing apparatus using the base plate of the existing elastic bearing apparatus characterized by the above-mentioned.

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