JP2014206003A - Installation state adjustment method for seismic isolator, and support adjustment trestle for base plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a support adjustment trestle that reduces interference with a reinforcing bar arranged in a foundation structure, and easily and finely adjusts an installation state of a base plate in horizontal and vertical directions while supporting the base plate and an installation state adjustment method for a seismic isolator using the same, and especially to achieve cost reduction by improving workability in a construction field using a support adjustment trestle which can be manufactured using inexpensive members.SOLUTION: There is provided an installation state adjustment method for a seismic isolator which finely adjusts an installation state of a base plate for seismic isolator installation while supporting the base plate when constructing an installation foundation part below the base plate. The installation state of the base plate is finely adjusted by a support adjustment trestle, comprising a base part where an adjusting bolt is stood and a long nut which has a spherical part at one end and also has the adjusting bolt inserted into the other end, by adjusting the position of the spherical part by turning the long nut with the base plate supported at a contact for the spherical part.

Description

  The present invention relates to an installation technology for a base isolation device for a building, and more specifically, when an installation base is constructed at the bottom of a base plate for installing a base isolation device, the installation state is finely adjusted while supporting the base plate. And a support adjustment stand for the base plate.

  Seismic isolation devices, in particular laminated rubber type seismic isolation devices, generally have flange plates on the top and bottom of laminated rubber composed of alternately laminated rubber sheets and steel plates. It attaches between each structure via the base plate installed in each structure and lower structure. Since the seismic isolation device is continuously subjected to a large load on the upper frame for a long period of time, extremely high work accuracy is required at the time of installation in order to reliably exhibit and maintain its performance.

FIG. 1 is a cross-sectional view showing an attached state of a general laminated rubber type seismic isolation device. The seismic isolation device is obtained by attaching flange plates UF and LF on the upper and lower sides of the laminated rubber A, and each flange plate is attached to the structures UC and LC via the base plates UB and LB. Further, anchor bodies UA and LA each having a fixing plate P at the tip are mounted in advance on the base plates UB and LB, respectively. FIG. 2 is a plan view of the base plate LB, and a hole H for injecting concrete or the like is provided in the center.

FIG. 3 is a side view showing the steps of constructing the foundation-side structure on which the base plate UB is installed step by step in the order of a to e. Step (a) shows a state in which the base plate LB with the anchor body LA mounted at a predetermined position on the ground S is first installed with a crane or the like. At this time, the support adjustment base L is also attached to the base plate LB by welding. In addition, on the ground S, reinforcing bars W for the base-side structure are arranged in advance.

The support adjustment stand L is for precisely supporting the base plate LB at a predetermined height on the ground S, and FIG. 4 is an enlarged view of the lower end thereof. The support adjustment base L is formed by welding a lower plate LP to the lower end of an angle member having an L-shaped cross section, and the upper end is attached by welding to the lower surface of the base plate LB. In the lower plate LP, a nut N is welded to the upper surface of a through hole (not shown), and the adjustment bolt AB is screwed through the nut N with the head facing down. The adjustment bolt AB is rotated to change the amount of protrusion below the lower plate LP, thereby adjusting the overall length of the support adjustment base L, and supporting the base plate LB at a predetermined height on the ground S while maintaining the horizontal level. Make adjustments. The head of the adjustment bolt AB is grounded on a laying plate BP that is fixed in advance on a ground S at a predetermined position. Step B in FIG. 3 shows a state where the base plate LB is supported and installed at a predetermined position and height.

In step C, the anchor body LA and the reinforcing bar W are connected and integrated by welding additional reinforcing bars, and then the outer periphery is surrounded by a mold F in step D, and then the concrete C or the like from the hole H of the base plate LB. Is filled into the mold F. In the process (e), the concrete structure C is solidified to complete the foundation structure LC in which the base plate LB is fixed on the upper surface, and the flange plate LF of the seismic isolation device can be bolted and installed on the base plate LB. In addition, the anchor body LA and the support adjustment base L are embedded together with the reinforcing bars W inside the foundation structure LC, and the fixing plate P resists the pulling force to the anchor body LA when an earthquake occurs.

Previously, the base plate support adjustment stand was installed outside the foundation structure and adjusted, and after disposing and removing concrete etc., the support adjustment stand was attached to the base plate in advance as described above. If it is buried in concrete as it is, the base plate can be stably supported from directly below, and disassembling and removing work is not required. Therefore, in recent years, such a method is generally used. However, since a large number of reinforcing bars are arranged inside the foundation structure, it is necessary not only to attach the support adjustment stand to the base plate so that it does not interfere with the reinforcing bars, but also to install the laying plate accurately. In some cases, there is a problem that a working space for adjusting the installation state of the base plate cannot be secured (hands are not available).

Although the above-mentioned support adjustment frame can be manufactured with an inexpensive material, it is necessary to accurately weld an L-shaped cross section to the lower plate and further to a nut to the lower plate, which requires a lot of work for positioning and welding work. . In addition, the height adjustment by the support adjustment base is performed by rotating the head of the adjustment bolt in a state where the load of the base plate is applied, so a tool such as a spanner is necessary, and it becomes difficult when the work space is narrow. . On the other hand, when the adjustment bolt is rotated, the laying plate is displaced due to friction with the head and the workability is deteriorated. Therefore, in order to prevent this, it is necessary to fix the laying plate to the ground with an all anchor or the like. . Furthermore, when the ground S is provided with a water gradient for drainage, the adjustment bolt is inclined and abuts against the laying plate. There is a problem that workability is further reduced.

With respect to such a problem, for example, in the seismic isolation device installation state adjusting device according to the patent invention described in Patent Document 1, a base plate is provided via an adjusting bolt that is provided with a female screw member on the lower surface of the base plate and screwed into the female screw member. In this method, the positioning engaging member that is rotatable with respect to the adjusting bolt is engaged with the lower portion of the adjusting bolt in an unfixed state in the horizontal direction. Proposal to adjust the horizontal position of the base plate while the member is not fixed, and to perform fine adjustment with the adjusting bolt in a state where the engaging member is fixed and the horizontal movement of the base plate is regulated via this position Has been. In the patented invention, a through hole communicating with the female screw member is formed at an attachment location of the female screw member of the base plate, and the upper end of the adjustment bolt can be rotated by a tool through the through hole from above the base plate. It is also proposed to remove the technical constraints.
Japanese Patent No. 4144809

However, in this patented invention, since the female screw member is fixed to the base plate by welding or the like in advance, the arrangement of the installation state adjusting device cannot be changed, and the horizontal position adjustment in the field corresponding to the interference with the reinforcement is not possible. Can not. Further, in addition to the anchor body mounting operation in the base plate manufacturing stage, it is necessary to accurately fix the female screw member by welding or the like, and it is inevitable that the cost increases due to an increase in man-hours. The same applies to the operation of providing the through hole in the base plate. Also, the adjustment bolt must be rotated with a tool. When the engaging portion formed on the adjustment bolt is rotated with the tool below the base plate, the problem of the work space restriction is still not solved. .

The present invention was created in view of such problems of the prior art, reduces interference with reinforcing bars arranged in the foundation structure, and supports the base plate in the horizontal and vertical directions of its installed state. It is an object of the present invention to provide a support / adjustment stand that can easily perform fine adjustment and an installation state adjustment method for a seismic isolation device using the support / adjustment stand. In particular, in the present invention, the main problem is to reduce the cost of both the member and the work by realizing the workability improvement at the construction site by using a support adjustment stand that can be manufactured with an inexpensive member. .

In order to solve the above-mentioned problem, the invention described in claim 1 is a seismic isolation system that finely adjusts the installation state while supporting the base plate when constructing the installation base portion in the lower part of the base plate for installing the seismic isolation device. A method for adjusting the installation state of the apparatus, comprising a base part in which an adjustment bolt is erected, and a long adjustment nut that has a spherical part at one end and has the adjustment bolt penetrated at the other end. The technical means was adopted in which the installation state of the base plate is finely adjusted by adjusting the position of the spherical portion by rotating the long nut while the base plate is supported by the contact point with the spherical portion.

Unlike the support adjustment device in the prior art, the support adjustment stand is an independent member that is not attached to the base plate, and has been adjusted in advance to an appropriate position on the ground where the foundation structure is to be constructed. Place the base plate with the anchor body from above with a crane or the like and place it on the support adjustment stand to support it, and then make fine adjustments for each support adjustment stand to change the base plate placement state. Optimize.

In order to stably support the base plate and adjust its installation state, at least three or more support adjustment stands are required in principle. However, depending on the case, a part of the base plate is set at a predetermined height by some means. It is also possible to adjust the height by supporting and supporting other parts with one or two support adjustment stands. The base plate is generally supported in a horizontal state, but is not necessarily limited to this, and it is sufficient that the seismic isolation device installed on the upper surface functions appropriately. In addition, the position where the support adjustment base is arranged may be a position where the support can be stably adjusted when the base plate is placed. If reinforcing bars are arranged in advance on the ground, they do not interfere with them. In addition, an appropriate position can be selected in consideration of workability of fine adjustment work after the base plate is placed.

The support adjustment stand is composed of a base portion having adjustment bolts and a long nut. The base part is welded so that a round steel bar stands upright in the center of a base plate made of, for example, a square steel plate, and the lower end of an adjustment bolt that is a cut-off bolt in a blind tube screw hole provided at the upper end of the round steel bar And can be easily manufactured by welding and fixing the screwed portion. In addition, since it is sufficient if the base part can maintain the adjustment bolt vertically upright on the ground, a round steel bar can be used if the adjustment bolt can be accurately raised vertically on the base plate. Alternatively, a normal bolt having a dimensioning bolt or a head may be used as an adjustment bolt, and the lower end of the dimensioning bolt or the head of the bolt may be directly welded and fixed to the center of the base plate.

The long nut has a spherical portion at the upper end, and an adjustment bolt is screwed into the lower end. As will be described later, the long nut is used in order to allow the operator to grip and rotate the long nut directly by hand in the operation of finely adjusting the height of the base plate to be supported. As in the above-mentioned patented invention, a tool is always required in the configuration in which the adjustment bolt is provided with the engaging portion and the tool is engaged with the adjustment bolt to rotate the adjustment bolt itself. However, in the present invention, the tool can be gripped by hand. Since the height can be adjusted by rotating the nut itself using a long nut, a tool can be dispensed with.

On the other hand, the spherical portion at the upper end of the long nut does not have to be strictly a true sphere, and may be a hemispherical shape or a conical shape as long as the lower surface of the base plate placed above can be supported by “points”. It is possible to process the upper nut into a hemispherical or conical shape with the long nut as a blind tube from below, but the steel ball is fitted into the upper screw hole of the long nut having a simple through screw hole, and the fitting part is It can be configured at the lowest cost and easily by welding and fixing. In this case, the diameter of the steel ball is arbitrary depending on the cross-sectional diameter of the long nut, but it can be stably fitted to the surface of the upper screw hole of the long nut, and the upper surface of the spherical surface can support the lower surface of the base plate with “points”. If a steel ball having a true sphere diameter is used, the support point accurately coincides with the axis of the support adjustment frame, so that a positioning work is not required and the spherical portion at the upper end of the long nut can be easily configured.

  In addition, by screwing the fixing nut in advance below the long nut, rotating the long nut to complete the height adjustment of the base plate, and then rotating the fixing nut to a position where it abuts the long nut. The long nut can be fixed by the so-called “reverse screw effect”. As a result, the long nut is prevented from being loosened due to vibration during construction work and the height adjustment position of the base plate is shifted.

Construction using the seismic isolation device installation state adjusting method according to the present invention is performed in the following steps. First, a support adjustment stand adjusted in advance to an appropriate height is arranged at an appropriate position on the ground where the reinforcing bars of the foundation structure are arranged. The arrangement of the support adjustment base supports each load of the base plate, taking into account the anchor body mounting position of the base plate and the state of the bar arrangement, and securing the work space for performing the height adjustment work by rotating the long nut later. Select a position that can be properly distributed and stably supported on the adjustment stand. In addition, the friction between the ground surface and the bottom surface of the base plate is small due to the ground surface condition, and the base plate can be easily adjusted when fine adjustment is performed by rotating the long nut after placing the base plate on the support adjustment base. When there is a high possibility of sliding and rotating on the ground surface, it is desirable to fix the base plate to the ground surface with an all anchor or the like.

Next, the base plate to which the anchor body is attached is lowered by a crane or the like and placed on the support adjustment base. As a result, the base plate is supported by “spots” on the spherical portion at the upper end of the long nut of each support adjustment frame. Thereafter, the operator measures the height and the inclination of the base plate from the ground, and sequentially rotates the long nut of each support adjustment frame to finely adjust the horizontal level of the base plate. At this time, if there is enough work space around the long nut below the base plate, rotate the long nut with a tool such as a spanner.If the work space is small and it is difficult to use the tool, Fine adjustment work is performed by directly gripping and rotating the long nut.

As described above, since the base plate is supported by “spots” by the spherical part at the top of the support adjustment stand, the contact area between the two is minimal, compared to the state in which the bolt head is in contact with the laying plate as in the prior art. Friction is also very small. Therefore, even if the load of the base plate is supported, the operator can perform fine adjustment work while directly gripping and rotating the long nut as long as the hand reaches the long nut without using a tool. Therefore, finer fine adjustment is possible.

After completing the fine adjustment work of the base plate, the reinforcing bars are welded between the anchored bars and the support adjustment frame itself as usual, and are connected and tied together to integrate them. Work to prevent misalignment of members. After that, if a formwork for the foundation structure is installed, concrete or the like is poured from the hole of the baseplate and solidified, and the formwork is removed after curing, the foundation structure with the baseplate installed on the upper surface is completed.

Next, the invention described in claim 2 adjusts the installation state of the seismic isolation device that finely adjusts the installation state while supporting the base plate when constructing the installation base portion under the base plate for installing the base isolation device The base plate support / adjustment stand used in the method, comprising: a base portion in which an adjustment bolt is upright; and a long nut having a spherical portion at one end and the adjustment bolt penetrated at the other end. It is characterized by. The configuration of the support adjustment frame according to the present invention is as described above in the description of the invention according to the first aspect.

Next, the invention described in claim 3 is the installation state adjustment of the seismic isolation device that finely adjusts the installation state while supporting the base plate when constructing the installation base portion in the lower part of the base plate for installing the seismic isolation device In the method, the other end of a long nut having a spherical portion at one end is inserted into an adjustment bolt that is upright on the lower surface of the base plate, and the long nut is rotated while the spherical portion is grounded and the base plate is supported. Thus, a technical means for finely adjusting the installation state of the base plate by adjusting the position of the adjusting bolt was adopted.

In this invention, what remove | excluded the base plate from the support adjustment stand described in Claim 2 is turned upside down, and a base part is directly attached to a base plate and used. The other structure of the support adjustment frame is the same as that of the second aspect. When the base plate is lowered and placed on the ground surface after adjusting the total length of the support adjustment base to a predetermined length in advance, the spherical part that becomes the lower end of the long nut comes into contact with the ground surface, and the base plate is Supported. At this time, the spherical part may be in direct contact with the ground surface. However, if the friction between the spherical part and the ground part increases depending on the state of the ground surface, the spherical part may be brought into contact with the ground plate used in the prior art. May be. The base part may be attached to the base plate by a direct welding method, or the support adjustment base having the base plate may be turned upside down and the base plate may be welded to the base plate. Fine adjustment of the height of the base plate is performed by rotating the long nut as in the first aspect of the invention. The construction work of the foundation structure after completion of fine adjustment is the same.

Next, the invention described in claim 4 is the installation state adjustment of the seismic isolation device that finely adjusts the installation state while supporting the base plate when constructing the installation base portion in the lower part of the base plate for installing the seismic isolation device A base plate used in the method is characterized by having an adjustment bolt upright on the lower surface and a long nut having a spherical portion at one end and the adjustment bolt inserted into the other end. This invention is the baseplate which attached the support adjustment mount used for the installation state adjustment method of the seismic isolation apparatus described in Claim 3, The structure is as above-mentioned.

According to the present invention, the following effects can be obtained.
(1) Since the fine adjustment of the height of the base plate can be performed only by rotating the long nut, workability can be greatly improved.
(2) Since the support adjustment stand according to claim 1 or 2 is a member independent of the base plate, it is easy to perform subsequent fine adjustment work while avoiding interference with the rebar that has already been arranged, particularly in the construction site. It can be placed at the position, and the workability of fine adjustment work can be greatly improved.
(3) Similarly, since the support adjustment frame according to claim 1 or 2 does not use a laying plate, it is not necessary to accurately install the laying plate, and the adjustment bolt and the laying plate are misaligned during fine adjustment work. Therefore, workability can be greatly improved.
(4) The long nut can be rotated by hand with the base plate placed, and the work space is narrow and work is possible even in places where it is difficult to use tools, greatly improving the workability of fine adjustment work. In addition, the accuracy of adjustment can be improved.
(5) Even if the ground surface has a slope of water gradient, the long nut can rotate because the spherical part supports the base plate with “points”, so the applicable range of the support adjustment stand is wide, and a special dedicated member is prepared. This eliminates the need to do this, improving workability and reducing costs.
(6) The base portion having the adjusting bolt can be composed of a rectangular steel plate, a round bar steel and a dimensioned bolt, and the long nut having the spherical portion can be composed of a long nut and a steel ball. These members can be used not only for existing general-purpose products that are inexpensive, but also because the number of welded parts is smaller than that of the prior art, a support adjustment stand can be manufactured at a low cost, thereby reducing construction costs.
(7) In the inventions according to claims 3 and 4 in which the support adjustment frame is attached to the base plate, the effects (1) and (4) to (6) are achieved.
(8) Since the support adjustment stand according to claim 1 or 2 is an independent member and can be used alone as described above, the support adjustment stand can be attached to the structure via the base plate regardless of the seismic isolation method or structure. It can be applied to seismic devices in general, and can also be widely applied to the case where precise horizontal level adjustment of a member having a planar structure or the like is performed in a construction work.

EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated with reference to drawings.
(First embodiment)
FIG. 5 is a side view showing an embodiment of the support adjustment stand 1 according to the first and second aspects of the present invention. The left figure shows the disassembled state of the used member, and the right figure shows the completed state. The support adjustment frame is composed of a base part 10, a cutting bolt 20, a long nut 30, a fixing nut 40, and a steel ball 50, and the base part 10 is centered on the surface of a base plate 11 made of a square steel plate. A round steel rod 12 provided with a blind tube screw hole 13 at its upper end is welded M in a vertically standing manner. A steel ball 50 having a diameter larger than the screw hole diameter of the long nut is welded M to the upper end of the long nut 30. Assembling of the support adjustment base 1 is performed by screwing the lower end of the cutting bolt 20 into the blind tube screw hole 13 and fixing it with the welding M, passing the fixing nut 40 from the upper end of the cutting bolt 20 first, and then the long nut 30. Screw together. After the assembly is completed, the support adjustment pedestal 1 determines the height by rotating the long nut 30 by hand in advance so as to coincide with the height from the ground corresponding to the planned placement position of the construction site to the lower surface of the base plate LB, The fixing nut 40 is rotated and raised until it contacts the lower end of the long nut 30 to fix the position of the long nut 30. Although the height determination of the support adjustment stand 1 and the fixing operation of the long nut 30 may be performed in advance, they may be carried into the construction site, or may be performed at the construction site.

  FIG. 6 is a side view showing a fine adjustment operation performed after the assembled support adjustment base 1 is installed at a planned arrangement position on the ground S and the base plate LB is placed thereon. When a gap is generated between the mounted base plate LB and the steel ball 50, the long nut 30 is rotated and raised until the top of the steel ball 50 comes into contact with the lower surface of the base plate LB. The nut 40 is rotated and raised until it abuts the lower end of the long nut 30 to fix the position of the long nut 30 and the fine adjustment operation is completed.

  In FIG. 6, it is described that a large gap is generated for the sake of explanation. However, in actual construction, the steel balls 50 of all the support adjustment bases 1 are in contact with the lower surface of the base plate LB and the load is increased. In a state in which the long nut 30 is gradually rotated while measuring the slight inclination of the base plate LB, the fine adjustment is performed. At this time, since the reinforcing bars are already arranged in the lower part of the base plate LB, the working space for fine adjustment is restricted and the use of the tool is often difficult. In the gantry 1, as long as the operator's hand reaches any part of the long nut 30, it is possible to easily rotate the long nut manually, so that workability is greatly improved.

  FIG. 7 is a side view showing a case where the same support adjustment stand 1 is applied on the ground S having an inclination. Since the ground S has an inclination R as a water gradient, the support adjustment stand 1 disposed thereon also has an inclination R with respect to the vertical direction. Even when the base plate LB is placed in such a state, the steel ball 50 supports the lower surface of the base plate LB with “points”, so that it is relatively easy to perform fine adjustment work by manually rotating the long nut 30. Moreover, the operation | work which correct | amends the inclination of the support adjustment stand 1 corresponding to the inclination R is also unnecessary.

In the prior art, the bolt attached to the L-shaped angle was grounded to the ground S via the laying plate, so when the bolt was rotated for fine adjustment work, the head of the bolt and the laying under the influence of the inclination R Although the plate is "galling", it may be difficult to rotate or the grounding position of the bolt may be shifted, resulting in a decrease in workability and work accuracy. Is resolved.

(Second embodiment)
FIG. 8 is a side view showing an installed state of an embodiment of a base plate to which a support adjustment base is attached in the inventions of claims 3 and 4. The support adjustment stand 2 is attached by welding the base portion 10 without the base plate directly to a predetermined position on the lower surface of the base plate LB with the long nut 30 facing downward. The steel ball 50 is grounded via a laying plate BP installed on the surface of the ground S and supports the base plate LB at “points”.

In the second embodiment, after the base plate LB, in which all the support adjusting bases 2 have been adjusted to the required height, are lowered and installed on the laying plate BP, a long nut is measured while measuring a very slight inclination of the base plate LB. Rotate 30 up and down slightly to make fine adjustments. Even in the second embodiment, the long nut can be easily rotated manually as long as the operator's hand reaches any part of the long nut 30. Therefore, the workability is improved as compared with the prior art. Is greatly improved. In addition, since the support plate 2 and the steel ball 50 are in contact with each other at “points”, the problem of “galling” between the support plate BP and the bolt head in the prior art does not occur. Is greatly improved. Other configurations and work processes are the same as those in the first embodiment.

  As mentioned above, although the specific structure of several embodiment was demonstrated in detail about the installation adjustment method of the seismic isolation apparatus and the support adjustment stand of a baseplate which concern on this invention, this invention is not limited to the said embodiment. However, improvements or changes can be made within the scope of the technical idea of the present invention, and they belong to the technical scope of the present invention.

  The present invention provides a significant improvement in workability in the process of finely adjusting the installation state while supporting the base plate when constructing the installation base portion below the base plate for installing the seismic isolation device, Cost reduction in the production is possible. Moreover, when using the support adjustment stand in this invention as an independent single member, it is applicable not only to the installation state adjustment of various seismic isolation devices, but also to the plane level adjustment of various members in architectural civil works. .

Sectional view showing the mounting state of a general laminated rubber system seismic isolation device Top view of a typical base plate Side view showing step by step the process of constructing the foundation side structure with the base plate installed Enlarged perspective view of the lower end of a general support adjustment stand used in conventional technology The side view of the support adjustment stand which concerns on 1st embodiment of this invention The side view which shows the fine adjustment work by the support adjustment stand which concerns on 1st embodiment of this invention The side view which shows the case where the support adjustment mount based on 1st embodiment of this invention is applied to the inclined ground The side view which shows the installation state of the baseplate which attached the support adjustment stand which concerns on 2nd embodiment of this invention.

A Seismic isolation device (laminated rubber part)
B Bolt AB Adjustment bolt (Conventional technology)
C Concrete etc. F Formwork S Ground UF, LF Seismic isolation device (flange plate part)
UB, LB Base plate UC, LC structure LA anchor body (main body)
P Fixing plate R Inclination angle H Hole (base plate)
L L-shaped angle LP Lower plate BP Laying plate N Nut M Welding 1 Support adjustment stand (first embodiment)
2 Support adjustment stand (second embodiment)
DESCRIPTION OF SYMBOLS 10 Base part 11 Base plate 13 Blind pipe screw hole 20 Cutting bolt 30 Long nut 40 Fixing nut 50 Steel ball

Claims (4)

  A base in which adjustment bolts are upright in a method for adjusting the installation state of a seismic isolation device that finely adjusts the installation state while supporting the base plate when constructing an installation base portion below the base plate for installing the base isolation device The long nut is supported in a state in which the base plate is supported at a contact point with the spherical portion by a support adjustment stand including a spherical portion at one end and a long nut having the adjustment bolt penetrated at the other end. A method for adjusting the installation state of a seismic isolation device, wherein the position of the spherical part is adjusted by rotating to finely adjust the installation state of the base plate. The base plate support adjustment platform used in the method of adjusting the installation state of the seismic isolation device that finely adjusts the installation state while supporting the base plate when constructing the installation base at the bottom of the base plate for installing the seismic isolation device. The base plate for installing the seismic isolation device is characterized by comprising a base portion with the adjustment bolt upright and a long nut having a spherical portion at one end and the adjustment bolt inserted into the other end. Adjustment stand.   In the installation state adjustment method of the seismic isolation device that finely adjusts the installation state while supporting the base plate when constructing the installation base part at the bottom of the base plate for installing the seismic isolation device, the adjustment is made upright on the lower surface of the base plate Adjusting the position of the adjusting bolt by inserting the other end of a long nut having a spherical part at one end into a bolt and rotating the long nut while grounding the spherical part and supporting the base plate. A method for adjusting the installation state of the seismic isolation device, wherein the installation state of the base plate is finely adjusted.   A base plate for use in a method of adjusting the installation state of a seismic isolation device that finely adjusts the installation state while supporting the base plate when constructing an installation base portion under the base plate for installing the seismic isolation device. A base plate for installing a seismic isolation device, comprising: an adjusting bolt, and a long nut having a spherical portion at one end and the adjusting bolt inserted into the other end.

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