JP5944732B2 - Installation method of elastic bearing - Google Patents

Description

  The present invention relates to an installation method of an elastic bearing for isolating a structure.

  When installing a seismic isolation device for seismic isolation repair work, etc., the pillars and piles that support the structure are cut and removed, and the seismic isolation device is installed at the cut and removed locations. Often installed. For example, in patent document 1, the seismic isolation apparatus is installed between the pillar and the pile in the state which received the structure temporarily with the steel pipe type support.

  Here, when the seismic isolation device is an elastic bearing having a rubber support such as a laminated rubber bearing, when the seismic isolation device receives the load of the structure after removing the temporary support, the seismic isolation device contracts vertically. Then the structure will sink.

  To avoid this problem, install the seismic isolation device in a state where the seismic isolation device is compressed in the vertical direction by an amount that can be generated when the seismic isolation device receives the load of the structure. However, in order for the installed seismic isolation device to exhibit a predetermined seismic isolation function, it is necessary to apply a uniform compressive force to the seismic isolation device.

JP 2010-37837 A

  This invention considers the fact which concerns, and makes it a subject to give a compressive force uniformly with respect to a seismic isolation apparatus.

The invention of the first aspect includes a step of cutting and removing a part of the structural member in a state where the vertical load of the structure supported by the structural member is supported by a support, and dividing the structural member into an upper member and a lower member; After the upper surface or the lower surface of the elastic bearing is attached to the lower surface of the upper member or the upper surface of the lower member, a fixing member whose height can be adjusted is disposed in the center in the plan view of the lower surface or the upper surface of the elastic bearing. Or after arranging a height-adjustable fixing member at the center in a plan view of the lower surface or upper surface of the elastic bearing, the upper surface of the elastic bearing or the upper surface of the lower member or the upper surface of the lower member. Attaching a lower surface, and arranging a plurality of jacks around the fixing member, pressing the lower surface or the upper surface of the elastic bearing with the jack using the upper surface of the lower member or the lower surface of the upper member as a reaction force, Compressing the elastic bearing; Adjusting the height of the fixing member to fix the elastic bearing to the lower member or the upper member; transferring the vertical load supported by the jack to the fixing member; and removing the jack; And a step of removing the support work.

In the invention of the first aspect , the elastic bearing in a compressed state can be fixed to the lower member or the upper member in a state where the vertical load of the structure is supported by the support work. When the elastic bearing receives a vertical load, it can be prevented that the elastic bearing contracts in the vertical direction and the structure sinks or the structure sinks unevenly.

  In addition, since the outer peripheral portion of the lower surface or upper surface of the elastic bearing is pushed by a plurality of jacks arranged around the fixing member, the elastic bearing is compressed by moving the lower surface or upper surface of the elastic bearing in the vertical direction. Force can be applied. Thereby, a compressive force can be given uniformly with respect to an elastic bearing.

The invention of the second aspect is the setting method of the elastic bearing of the first aspect , wherein the elastic plate is attached to the lower surface or the upper surface of the elastic bearing, the jack is disposed below or above, and the support plate is provided on the support plate, And an engaging portion that engages the fixing member so as to be movable in the vertical direction.

In the second aspect of the invention, the height of the fixing member can be adjusted by the engaging portion that engages the fixing member so as to be movable in the vertical direction. Moreover, since the force generated at the joint between the fixing member and the support plate is dispersed throughout the support plate, it is possible to prevent an excessive force from being generated locally on the lower surface or the upper surface of the elastic bearing.

The invention of the third aspect is the installation method of the elastic bearing of the first or second aspect , wherein the hierarchy of the building where the seismic isolation work is performed is divided into a plurality of work spaces, and the elastic bearings are attached to the respective work spaces. Go.

In the invention of the third aspect , a place other than the work space where the elastic bearing is attached in the hierarchy of the building where the seismic isolation repair work is performed can be used without being affected by the seismic isolation repair work ( For example, a resident can live as usual in a place other than the work space where the elastic bearing is attached). That is, it is possible to perform the so-called construction while being.

  Since this invention was set as the said structure, it can give a compressive force uniformly with respect to a seismic isolation apparatus.

It is a front view which shows the procedure of the installation method of the elastic bearing which concerns on embodiment of this invention. It is a front view which shows the procedure of the installation method of the elastic bearing which concerns on embodiment of this invention. It is a front view which shows the procedure of the installation method of the elastic bearing which concerns on embodiment of this invention. It is a front view which shows the laminated rubber bearing which concerns on embodiment of this invention, and the mount for a bearing replacement. It is AA sectional drawing of FIG. It is sectional drawing which shows the modification of the fixing member which concerns on embodiment of this invention. It is a front view which shows the modification of the fixing member which concerns on embodiment of this invention. It is BB sectional drawing of FIG. It is a front view which shows the modification of the load transmission plate which concerns on embodiment of this invention. It is an elevation view which shows the condition of the seismic isolation repair work using the installation method of the elastic bearing which concerns on embodiment of this invention.

  Embodiments of the present invention will be described with reference to the drawings. Here, an example in which the floor 12 of the first floor portion of the existing building 10 shown in the front view of FIG. 1A is repaired to a seismic isolation layer using the elastic bearing installation method of the present invention will be described.

  As shown to Fig.1 (a), the structure 14 which comprises the upper part from the 2nd floor of the existing building 10 is supported by the pillar 16 of the 1st floor as a structural member. The column 16 supports a beam 18 on the second floor, and the beam 18 supports a floor slab 20 on the second floor.

  In the elastic bearing installation method of the present embodiment, the frame reinforcing process, the structure temporary receiving process, the structural member cutting / removing process, the elastic bearing mounting process, the bearing replacement installation process (the supporting support member A part of the column 16 by performing the mounting process, the mounting process of the load transmitting member), the jack placing process, the preloading process, the elastic bearing fixing process, the load transfer process to the fixing member, and the support removal process. Is cut and removed, and a laminated rubber bearing 22 as an elastic bearing, which will be described later, is installed at this cut and removed position.

  In the installation method of the elastic bearing, first, as shown in the front view of FIG. 1B, the periphery of the lower portion of the column 16 and the periphery of the column beam joint portion 24 joining the beam 18 and the column 16 In addition, the reinforced concrete V is increased in number (reinforcing step of the frame).

  Next, as shown in FIG. 1C, a structure in which the column 16 supports a temporary support column 26 as a support for transferring and supporting the vertical load of the structure 14 supported by the column 16. As many as the number that can bear the vertical load of the object 14 is installed around the pillar 16.

  The temporary support column 26 is placed on a hydraulic jack 32 installed just above the foundation beam 30 on the floor slab 28 on the first floor. Then, by jacking up the hydraulic jack 32 and applying an axial force to be borne to the temporary support post 26, the upper end portion of the temporary support post 26 is pressed against the beam 18 to fix the temporary support post 26 to the beam 18. In other words, the vertical load of the structure 14 supported by the pillar 16 is supported by the temporary support column 26 (temporary reception process of the structure).

  Next, as shown in the front view of FIG. 1D, a part of the column 16 is cut and removed while the vertical load of the structure 14 supported by the column 16 is supported by the temporary support column 26. The column 16 is divided into an upper column 34 as a member and a lower column 36 as a lower member (structural member cutting / removal step).

  Next, as shown in the front view of FIG. 2 (a), a block-shaped bearing mounting portion 38 is constructed of reinforced concrete on the lower surface of the column beam joint portion 24, and a bolt or the like is formed on the lower surface of the bearing mounting portion 38. The upper flange 40 of the laminated rubber bearing 22 as an elastic bearing is attached. That is, the upper surface of the laminated rubber bearing 22 is attached to the lower surface of the upper column 34 via the bearing attachment portion 38 (elastic bearing attachment process). The laminated rubber bearing 22 is a bearing provided with a cylindrical bearing body 88 in which rubber layers and steel plates are alternately laminated.

  Next, as shown in the front view of FIG. 2B, the support replacement stand 42 is installed directly below the laminated rubber support 22 (installation step of the support replacement stand). As shown in the front view of FIG. 4, the support receiving stand 42 includes a support support member 44, a fixing member 46, and a load transmission member 48.

  As shown in FIG. 5 which is an AA cross-sectional view of FIG. 4, the support member 44 has a support plate 50 made of a steel plate having a square planar shape, and an upper end surface at the center in the plan view of the support plate 50. A plurality of engaging portions 52 made of joined steel pipes and a plurality of ribs 54 made of steel plates joined radially to the support plate 50 from the outer peripheral surface of the engaging portion 52 are provided. A female screw 56 is formed on the inner peripheral surface of the engaging portion 52, and a space S is formed between the adjacent ribs 54 so that a hydraulic jack 58 described later can be disposed. Yes.

  The fixing member 46 is made of a steel pipe, and a male screw 60 is formed on the outer peripheral surface. The fixing member 46 is inserted into the hollow hole of the engaging portion 52 by screwing the male screw 60 of the fixing member 46 into the female screw 56 formed in the engaging portion 52, and the engaging portion 52 is movable in the vertical direction. Is engaged. Therefore, by rotating the fixing member 46 with respect to the engaging portion 52, the screwing amount of the male screw 60 of the fixing member 46 with respect to the female screw 56 of the engaging portion 52 is changed to adjust the height of the fixing member 46. be able to.

  The load transmission member 48 includes a load transmission plate 62 made of a steel plate having a square planar shape, and a steel cotter member 64 protruding from the center of the load transmission plate 62 in plan view. The cotter member 64 is formed in a columnar shape, and the outer diameter is slightly smaller than the inner diameter of the fixed member 46.

  A plurality of grout injection holes 66 for filling grout into the hollow holes of the fixing member 46 are formed at the lower part of the fixing member 46, and grout is inserted into the hollow holes of the fixing member 46 at the upper part of the engaging portion 52. A plurality of air vent holes 68 for filling are formed.

  In the installation process of the support replacement stand, the support plate 50 provided with the fixing member 46 is attached to the laminated rubber bearing 22 by fixing the support plate 50 to the lower flange 70 of the laminated rubber bearing 22 with a bolt or the like. A mounting process of the support member and a mounting process of the load transmission member for fixing the load transmission member 48 to the lower column 36 by fixing the load transmission plate 62 to the upper surface of the lower column 36 with a bolt or the like. By performing the mounting process of the support member, the fixing member 46 is disposed at the center portion in plan view of the lower surface of the laminated rubber support 22.

  Next, as shown in the front view of FIG. 2B, FIG. 4, and FIG. 5, a plurality of hydraulic jacks 58 are arranged on the load transmission plate 62 positioned around the fixing member 46 (jack arranging step). . As shown in FIG. 5, the hydraulic jack 58 includes an outer peripheral region 72 (region other than the central portion of the bearing surface 76) in the bearing surface 76 of the laminated rubber bearing 22 including the outer peripheral region 72 and the central region 74. It is arranged in a space S formed between the ribs 54 so as to be located immediately below the rib 54. In the example of FIG. 5, the hydraulic jacks 58 are disposed in all of the eight spaces S formed between the ribs 54 so as to be equally spaced with respect to the circumferential direction of the circular bearing surface 76. When pushing the support plate 50 with the hydraulic jack 58, it is preferable to arrange three or more hydraulic jacks 58 so that the surface of the support plate 50 is held horizontally (unique) and can be translated in the vertical direction. More preferably, a hydraulic jack 58 is arranged.

  Next, as shown in the front view of FIG. 2 (c), the upper surface of the lower pillar 36 (load transmission plate 62) is used as a reaction force receiver, and the lower surface (lower flange 70) of the laminated rubber support 22 through the support plate 50. ) Is pushed by the hydraulic jack 58 (in FIG. 2 (c), the hydraulic jack 58 is jacked up), and the laminated rubber support 22 is compressed (preloading step). The compression force at this time is set such that when the temporary support column 26 is removed, the laminated rubber support 22 contracts vertically and the structure 14 does not sink. As a result, the lower surface of the fixing member 46 floats away from the upper surface of the load transmission plate 62.

  Next, as shown in the front view of FIG. 2D, the fixing member 46 is rotated with respect to the engaging portion 52 by a human hand, and the height of the fixing member 46 is adjusted. The fixing member 46 is extended downward until it comes into contact with the upper surface of the load transmitting plate 62, and the laminated rubber support 22 is fixed to the lower pillar 36 (elastic support fixing process). The cotter member 64 is accommodated in the hollow hole of the fixing member 46 with the lower surface of the fixing member 46 in contact with the upper surface of the load transmission plate 62. Accordingly, the vertical load acting on the laminated rubber support 22 can be reliably transmitted to the lower column 36 via the load transmission plate 62, and the shearing force acting on the laminated rubber support 22 (fixing member 46) is fixed. The member 46, the cotter member 64, and the load transmission plate 62 can be transmitted in this order and reliably transmitted to the lower column 36. When the fixing member 46 is rotated manually with respect to the engaging portion 52, a jig such as a steel rod may be inserted into the grout injection hole 66, and this may be rotated as a handle.

  Next, as shown in the front view of FIG. 3A, the axial force of the hydraulic jack 58 is released (the hydraulic jack 58 is jacked down in FIG. 3A), and the hydraulic jack 58 supports it. After the vertical load of the object 14 is transferred to the fixing member 46, the hydraulic jack 58 is removed (the process of transferring the load to the fixing member).

  Next, as shown in the front view of FIG. 3B, the axial force of the hydraulic jack 32 is released (the hydraulic jack 32 is jacked down in FIG. 3B), and the hydraulic jack 32 and the temporary support post 26 Is removed (support removal process).

  Next, the grout is injected from the grout injection hole 66 shown in FIG. 4, and the grout is filled in the hollow holes of the fixing member 46 and the engaging portion 52 and hardened.

  Finally, as shown in the front view of FIG. 3 (c), a block-like support support portion 78 in which the support receiving support 42 is embedded by reinforced concrete V on the upper surface of the lower column 36 is constructed.

  Next, operations and effects of the elastic bearing installation method according to the embodiment of the present invention will be described.

  In this embodiment, as shown in FIG. 2 (d), the laminated rubber bearing 22 in a compressed state can be fixed to the lower column 36 while the vertical load of the structure 14 is supported by the temporary support column 26. Therefore, when the provisional support column 26 is removed and the laminated rubber support 22 receives the vertical load of the structure 14, the laminated rubber support 22 contracts in the vertical direction, and the structure 14 sinks, It is possible to prevent the sinking.

  In general, the diameter of the bearing surface of an elastic bearing such as a laminated rubber bearing is several tens of centimeters or more, and a load of several hundred tons or more acts on the bearing surface. Therefore, in the preloading process described with reference to FIG. However, this level of compressive force must be applied to the laminated rubber support 22. Since the rubber layer constituting the laminated rubber bearing 22 has lower rigidity than that of steel frame or concrete, if such a large load is biased and acts on the bearing surface of the elastic bearing, an excessively large load is generated locally. If the layer is locally distorted or destroyed, it becomes impossible to exhibit a predetermined seismic isolation performance in a state where the laminated rubber bearing 22 is compressed. For example, when the center part is pushed with a hydraulic jack in a plan view of the bearing surface of the laminated rubber bearing, the bearing surface will be staggered with this center part as a fulcrum, so the compressive force is uniformly applied to the laminated rubber bearing. Can not give.

  On the other hand, in the present embodiment, as shown in FIG. 5, the outer peripheral region 72 in the bearing surface 76 of the laminated rubber bearing 22 is pushed by a plurality of hydraulic jacks 58 arranged around the fixing member 46. A compressive force can be applied to the laminated rubber support 22 by moving the bearing surface 76 (support plate 50) in the vertical direction. Thereby, it is possible to uniformly apply a compressive force to the laminated rubber support 22. Further, as shown in FIG. 2 (d), the laminated rubber support 22 is fixed to the lower column 36 by the fixing member 46 in a state where a compression force is uniformly applied to the laminated rubber support 22, so that the laminated rubber support 22 22 can be uniformly supported by the fixing member 46.

  Further, in the present embodiment, as shown in FIG. 4, the fixing member 46 is engaged with the engaging portion 52 so as to be movable in the vertical direction, so that the height of the fixing member 46 can be adjusted. . Further, the height of the fixing member 46 is adjusted by the screw mechanism formed by the female screw 56 formed on the engaging portion 52 and the male screw 60 formed on the fixing member 46. You can fine-tune the height.

  Further, in this embodiment, the force generated at the joint between the fixing member 46 and the support plate 50 is dispersed throughout the support plate 50, so that an excessive force is generated locally on the bearing surface 76 of the laminated rubber bearing 22. Can be prevented. For example, in FIG. 2C, since the force acting on the support plate 50 from the hydraulic jack 58 is dispersed throughout the support plate 50, the compression force can be applied to the laminated rubber support 22 more uniformly.

  Further, in the present embodiment, as shown in FIG. 5, the plurality of hydraulic jacks 58 are arranged at equal intervals with respect to the circumferential direction of the circular bearing surface 76. On the other hand, the pressing force by the hydraulic jack 58 can be applied to the support plate 50 uniformly. Thereby, the bearing surface 76 (support plate 50) of the laminated rubber bearing 22 can be translated more stably in the vertical direction.

  Further, as shown in FIG. 5, the support plate 50 of the present embodiment has a bending rigidity enhanced by the ribs 54, and the planar shape is maintained when pressed by the hydraulic jack 58. A compressive force can be applied uniformly to the bearing surface 76 of the laminated rubber bearing 22.

  Furthermore, in this embodiment, as shown in FIG. 3A, the vertical load supported by the hydraulic jack 58 is transferred to the fixing member 46 in a state where the laminated rubber support 22 is compressed. The hydraulic jack 58 can be diverted to the installation of the laminated rubber bearing 22.

  In the embodiment of the present invention, an example in which the structure 14 is a part above the second floor of the existing building 10 is shown. However, the structure 14 is a part above the first floor of the existing building 10, and this embodiment A plurality of laminated rubber bearings 22 may be installed on the foundation layer of the existing building 10 by using the elastic bearing installation method described above, and the existing building 10 may be designed to be isolated from the base, or the structure 14 may be installed in the existing building. 10 and the upper part from the third floor, and using the elastic bearing installation method of the present embodiment, a plurality of laminated rubber bearings 22 are installed in the intermediate layer of the existing building 10 to achieve the intermediate isolation of the existing building 10. You may do it.

  Moreover, although the example which used the structural member as the pillar 16 was shown in this embodiment, the other member which supports the vertical load of a structure may be sufficient. For example, the structural member may be a pile, a foundation bottom plate, or the like.

  Furthermore, in the present embodiment, an example in which the reinforced concrete V is increased around the lower portion of the column 16 and the column beam joint portion 24 in the reinforcing step of the frame shown in FIG. If the lower part and the column beam joint part 24 have the required strength, it is not necessary to increase the number of hits.

  Moreover, in this embodiment, as shown in FIG. 4, the example which has arrange | positioned from the bottom to the top in order of the load transmission member 48, the bearing support member 44, and the lamination | stacking rubber bearing 22 was shown, However, this arrangement is turned upside down. Also good. That is, the laminated rubber bearing 22, the bearing support member 44, and the load transmission member 48 may be arranged in this order from the bottom to the top.

  Specifically, a step of cutting and removing a part of the column 16 in a state where the vertical load of the structure 14 supported by the column 16 is supported by the temporary support column 26, and dividing the column 16 into an upper column 34 and a lower column 36. A step of attaching the lower surface of the laminated rubber support 22 to the upper surface of the lower pillar 36, a step of arranging a fixing member 46 whose height can be adjusted at the center in a plan view of the upper surface of the laminated rubber support 22, A step of arranging a plurality of hydraulic jacks 58 around the member 46, pressing the upper surface of the laminated rubber support 22 with the hydraulic jack 58 using the lower surface of the upper pillar 34 as a reaction force, and compressing the laminated rubber support 22, and a fixing member Adjusting the height of 46 and fixing the laminated rubber support 22 to the upper column 34; and transferring the vertical load supported by the hydraulic jack 58 to the fixing member 46 and then removing the hydraulic jack 58; Removing the temporary support post 26; Accordingly, it constitutes a method of installing the elastic bearing. In this case, the support plate 50 is attached to the upper surface of the laminated rubber support 22, and the hydraulic jack 58 is disposed above the support plate 50.

  Further, in the present embodiment, after attaching the upper surface of the laminated rubber bearing 22 to the lower surface of the upper pillar 34 via the bearing attaching portion 38, the fixing member 46 is attached to the central portion in plan view of the lower surface of the laminated rubber bearing 22. As shown in the example of arrangement, the bearing support member 44 provided with the fixing member 46 is first attached to the laminated rubber bearing 22, and the laminated rubber bearing 22 is connected to the upper column 34 via the bearing mounting portion 38. You may make it attach to the lower surface of. That is, the upper surface of the laminated rubber support 22 may be attached to the lower surface of the upper column 34 after the fixing member 46 is disposed at the center portion in plan view of the lower surface of the laminated rubber support 22.

  Furthermore, in this embodiment, although the example which made the elastic support the laminated rubber support 22 was shown, the elastic support should just be a support which has a rubber support part. For example, the elastic bearing may be a laminated rubber bearing with a lead plug or an elastic sliding bearing.

  Further, in the present embodiment, an example in which the jack is the hydraulic jack 58 has been described. However, the jack can press the lower surface of the laminated rubber support 22 to apply a necessary compressive force to the laminated rubber support 22. That's fine.

  Further, in the present embodiment, an example is shown in which the fixing member 46 is engaged with the engaging portion 52 so as to be movable in the vertical direction by screwing the male screw 60 of the fixing member 46 into the female screw 56 of the engaging portion 52. However, the fixing member 46 only needs to be provided so as to be movable in the vertical direction with respect to the engaging portion 52. For example, the engaging portion may be inserted into the hollow hole of the fixing member, and the male screw formed in the engaging portion may be screwed into the female screw formed in the fixing member.

  Further, as shown in the front sectional views of FIGS. 6A to 6C, the fixing member is slidable in the vertical direction with respect to the engaging portion 52 without forming screws in the engaging portion 52 and the fixing member 46. 46 may be provided. For example, when the engaging portion 52 moves upward by performing the preloading process from the state of FIG. 6A, the engaging portion 52 moves upward with respect to the fixing member 46 as shown in FIG. Since it slides, the fixing member 46 maintains the state of being placed on the load transmission plate 62 as it is. 6C, in this state, the grout is filled from the grout injection hole 66 into the hollow holes of the fixing member 46 and the engaging portion 52 and hardened. FIG. 6C illustrates a situation in which the grout G is filled up to the middle of the fixing member 46, but the grout G is filled up to the lower surface of the support plate 50. That is, the hollow hole of the fixing member 46 and the hollow hole of the engaging portion 52 are completely filled. Thereby, the laminated rubber bearing 22 (supporting support member 44) can be fixed to the lower column 36 (load transmitting plate 62).

  Furthermore, as shown in FIG. 8 which is a front view of FIG. 7 and a BB cross-sectional view of FIG. 7, the fixing member may be a wedge member 80 in which a thick steel plate is formed in a wedge shape. 7 and 8, a laminated rubber bearing 82 having a prismatic bearing body 86 having a square bearing surface is attached to the lower surface of the upper pillar 34, and the support plate 50 is attached to the lower surface of the lower flange 84 of the laminated rubber bearing 82. Is fixed by bolts or the like.

  As shown in FIG. 8, a rib 90 assembled in a cross beam shape is joined to the lower surface of the support plate 50. Further, as shown in FIG. 7, the lower end surface of the rib 90 is an inclined surface inclined downward toward the central portion in the horizontal direction. The inclination angle of the inclined surface and the wedge angle of the wedge member 80 are as follows. Are equal. In addition, a steel cotter member 92 is fixed to the lower surface of the support plate 50 located in the center in plan view so that the shearing force is reliably transmitted between the support plate 50 and the rib 90. Ribs 90 are arranged so as to surround the cotter member 92.

  As shown in FIG. 8, the hydraulic jack 58 is positioned directly below the outer peripheral portion region 96 (region other than the central portion of the bearing surface 94) of the bearing surface 94 of the laminated rubber bearing 82. It is arranged in a space P formed therebetween. In the example of FIG. 8, hydraulic jacks 58 are arranged in all eight spaces P so as to be equidistant from the circumferential direction of the square bearing surface 94.

  Then, as shown in FIG. 7, the support plate 50 and the rib 90 are lifted upward by the preloading process, so that the wedge-shaped gap formed between the lower end surface of the rib 90 and the upper surface of the load transmission plate 62 is obtained. The wedge member 80 is inserted, and the laminated rubber support 82 (support plate 50) is fixed to the lower column 36 (load transmission plate 62).

  In the present embodiment, as shown in FIG. 4, an example in which the shear force acting on the laminated rubber support 22 is transmitted to the lower pillar 36 by the cotter member 64 provided on the load transmission plate 62 has been described. The fixing member 46 may be fixed to the load transmission plate 62 by welding or the like without providing the reference numeral 64.

  Further, as shown in the front view of FIG. 9, the load transmission plate 62 shown in FIG. 4 is provided so as to block the cylindrical outer peripheral wall 100 such as a cylinder or a rectangular tube and the upper end opening of the outer peripheral wall 100. A steel load transmission cap 104 constituted by the plate 102 may be placed on the upper end portion of the lower column 36. In FIG. 9, by changing the screwing amount of the bolt 106 that is screwed into the plate 102 and adjusting the amount of protrusion of the end of the bolt 106 from the lower surface of the plate 102, the horizontal level of the plate 102 is adjusted. Yes. In addition, the gap formed between the upper surface of the lower pillar 36 and the lower surface of the plate 102 is filled with grout G and cured.

  Further, in the present embodiment, an example in which grout is injected from the grout injection hole 66 shown in FIG. 4 and the grout is filled into the hollow holes of the fixing member 46 and the engaging portion 52 and cured is shown. If the vertical load of the structure 14 can be supported by only 46, the grout need not be injected.

  Further, in the present embodiment, as shown in FIG. 3C, an example of constructing a block-shaped support support portion 78 in which the support replacement base 42 is embedded by reinforced concrete V on the upper surface of the lower column 36. Although shown, if the vertical load of the structure 14 can be supported only by the support replacement stand 42, the support support portion 78 may not be constructed.

  Moreover, the laminated rubber support 22 may be simultaneously installed with respect to each of the plurality of pillars 16 provided in the level 12 of the existing building 10 by using the elastic bearing installation method of the present embodiment. Or you may install the laminated rubber support 22 in order for every predetermined number of pillars 16.

  For example, as shown in the elevation views of FIGS. 10A to 10C, the floor 12 of the existing building 10 that performs the seismic isolation repair work is divided into a plurality of work spaces W1 to W5, and the work spaces W1 to W5 are divided. If the laminated rubber bearings 22 are attached in order to each of the columns 16 provided, the place other than the work space where the laminated rubber bearings 22 are attached should be used without being affected by the seismic isolation repair work. (For example, a resident can live as usual in a place other than the work space where the laminated rubber support 22 is attached). That is, it is possible to perform the so-called construction while being.

  In the example of FIG. 10A, the place other than the work space W1 where the laminated rubber support 22 is attached (the building space that becomes the work spaces W2 to W5), and in the example of FIG. 10B, the laminated rubber support. In the example of FIG. 10C, a work space where the laminated rubber support 22 is attached in a place other than the work space W2 where the attachment of the work piece 22 is performed (a building space that becomes work spaces W1, W3 to W5). Places other than W3 (building spaces that become work spaces W1, W2, W4, and W5) can be used without being affected by the seismic isolation work.

  Further, in this embodiment, an example in which the elastic bearing installation method of the present invention is applied to seismic isolation repair work is shown. However, the elastic bearing installation method of the present invention is applied to various replacement works of elastic bearings. be able to. For example, the present invention can be applied to a construction for replacing a bridge bearing material, a construction for installing a bearing material at a location where a construction pillar has been cut and removed, and the like, which is performed when constructing a new base-isolated building by a reverse driving method.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to such embodiment at all, Of course, in the range which does not deviate from the summary of this invention, it can implement in a various aspect.

14 Structure 16 Pillar (Structural member)
22, 82 Laminated rubber support (elastic support)
26 Temporary support column (support work)
34 Upper pillar (upper member)
36 Lower pillar (lower member)
46 fixed member 50 support plate 52 engaging portion 58 hydraulic jack (jack)

Claims (3)

Cutting and removing a part of the structural member in a state where the vertical load of the structure supported by the structural member is supported by a supporting work, and dividing the structural member into an upper member and a lower member;
A fixing member whose height can be adjusted via a support plate in which a plurality of plate-like ribs are provided in the center in a plan view of the lower surface of the elastic support after attaching the upper surface of the elastic support to the lower surface of the upper member To place,
A fixing member whose height can be adjusted via a support plate in which a plurality of plate-like ribs are provided at the center in a plan view of the upper surface of the elastic bearing after the lower surface of the elastic bearing is attached to the upper surface of the lower member To place,
After arranging a fixing member whose height can be adjusted via a support plate provided with a plurality of plate-like ribs in the center in plan view of the lower surface of the elastic bearing, the upper surface of the elastic bearing is placed on the lower surface of the upper member. Attach the
Alternatively, after disposing a fixing member whose height can be adjusted via a support plate provided with a plurality of plate-like ribs in the center in a plan view of the upper surface of the elastic bearing, the elastic bearing is placed on the upper surface of the lower member. Attaching the lower surface of the
A plurality of jacks are arranged around the fixing member so as to be positioned between the adjacent ribs, and the elastic support is interposed via the support plate with the upper surface of the lower member or the lower surface of the upper member receiving a reaction force. Pressing the lower surface or upper surface of the elastic bearing with the jack, and compressing the elastic bearing;
Adjusting the height of the fixing member to fix the elastic support to the lower member or the upper member;
Transferring the vertical load supported by the jack to the fixing member and removing the jack;
Removing the support work;
The installation method of the elastic bearing which has. The fixing member is composed of a first steel pipe in which a first screw is formed on the outer peripheral surface or the inner peripheral surface, and one fixing member is disposed in the central portion in a plan view of the lower surface or the upper surface of the elastic bearing,
The first steel pipe is vertically moved by engaging a first screw with a second screw formed on an inner peripheral surface or an outer peripheral surface of an engaging portion made of a second steel pipe joined to the support plate. The installation method of the elastic bearing of Claim 1 arrange | positioned so that a movement is possible . 2. The elastic bearing installation method according to claim 1 , wherein the ribs are arranged in a cross beam shape .