JPH11270186A - Fitting method of slide plate for slide journal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce cost by installing a slide plate receiving member provided with a level regulating mechanism on a structure foundation, and constructing a base isolation base in the condition of bolt-fastening the slide plate with the slide plate receiving member. SOLUTION: Plugs 11 for hole-in-anchor are buried in a structure foundation 8, and an angle frame 1 is installed on the structure foundation 8 through fitted anchor bolts 12. Next, respective nuts 13 and screw bars 7d are rotate to regulate the height and the horizontal level of the angle frame 1, and main reinforcement for base isolation base is arranged before and after the regulation. Next, a slide plate 3 is hung in a hanging hole 4 to be installed on the angle frame 1, and an angle material 2 is fixed to it. Next, a slide plate main body 3a is cured, a formwork for base isolation base is installed to place concrete, and after removing laitance, grout is poured in between the slide plate 3 and base isolation concrete. Hereby, a slide journal is loaded on the slide plate 3, and a grout quantity to be filled can be reduced, dispensing with production and transportation of a PCa slab.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for mounting a sliding plate in a sliding bearing structure for seismically isolating a building.

[0002]

2. Description of the Related Art Conventionally, construction of a seismic isolation table for supporting a sliding bearing is performed as follows. Explaining with reference to FIG. 9, first, the outer periphery 51 of the seismic isolation table is placed on the structure foundation 50.
Reinforcement such as a reinforcing bar for (rectangular bank portion) is laid and concrete is cast to construct the outer peripheral portion 51 of the rectangular frame-shaped seismic isolation table. Next, the sliding plate 53 is previously inserted into the concave portion in the outer peripheral portion 51.
The grout 54 is injected into the lower part of the PCa plate 52 after the PCa plate 52 into which is implanted is installed.

A sliding plate 5 driven into the PCa plate 52
Reference numeral 3 denotes a stainless steel sliding plate body attached to the center of the upper surface of a steel plate. Here, reference numeral 55 denotes a sliding bearing placed on the sliding plate 53.

[0004]

In the above method,
The level accuracy after installation on the sliding plate 53 is 1/10
In consideration of the requirement that the sliding plate 5
Although it is considered that 3 is driven into the PCa plate 52, if the driven PCa plate 52 is manufactured in a factory, the cost becomes high and the load becomes heavy, and it is difficult to transport.

Further, when the PCa plate 52 is manufactured on site, it takes time and effort to manage. Also, it is difficult to secure the production bet level itself. Further, in the above method,
It is necessary to inject a large amount of expensive grout 54 into the lower part of the PCa plate 52.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a method of mounting a sliding plate for a sliding bearing which can reduce costs.

[0007]

In order to solve the above-mentioned problems, a method of mounting a sliding plate for a sliding bearing according to the present invention comprises a seismic isolation table having a sliding plate provided on an upper surface on a structural foundation. A method for mounting the sliding plate in a sliding bearing structure, wherein the sliding bearing is mounted on the sliding plate, wherein a sliding plate receiving member provided with a level adjustment mechanism is installed on the structure foundation, The seismic isolation table is constructed with the slide plate bolted to the slide plate receiving member.

[0008] Here, the structural foundation is not limited to the pressure-resistant board, but includes the middle position of the pillar, the upper end of the pillar and the like. According to the present invention, since the sliding plate receiving member that supports the sliding plate includes the level adjusting mechanism, the sliding plate is supported by the sliding plate receiving member at a predetermined horizontal level by the level adjusting mechanism. At this time, since the slide plate is bolted to the slide plate receiving member, that is, is not fixed by welding, bending of the slide plate due to thermal distortion is prevented, and a desired horizontal level is secured.

Further, the production and transportation of the driving PCa plate is not required.

[0010]

Next, embodiments of the present invention will be described with reference to the drawings. First, the angle frame that supports the sliding plate will be described. This angle frame forms the main body of the slide plate support member.

The main body of the angle frame 1 is a plan view of FIG.
As shown in the figure, the angle member is formed into a rectangular shape, and the angle member 2 is also suspended at the center in the frame. In addition, all the vertical parts of each angle material of the angle frame 1 face downward, and the horizontal parts are on the upper side. Reference numeral 3 is
This shows the arrangement position of the sliding plate.

At the four corners of the rectangular frame 1a, sliding plates 3
A hole 5 for bolt penetration is opened at a position (see FIG. 2) which can face the hanging hole 4 provided at each of the four corners.
As shown in FIG. 2, cap nuts 6 are fixed to the lower end surfaces of the nuts.

Extending portions 1b are horizontally extended at the four corners of the rectangular frame 1a, and at the lower portion of the outer end of the extending portion 1b, as shown in FIG. An extended foot 1c is provided. A horizontal plate 1d extending horizontally is provided below the foot 1c, and a hole 1e for bolt penetration is opened in the horizontal plate 1d.

Further, a central level adjusting member 7 as shown in FIG. 2 is provided. The member 7 includes a horizontal portion 7a placed on a structure foundation 8, and a rising portion 7b made of an angle material extending upward from the horizontal portion 7a, and an axis is vertically directed above the rising portion 7b. Nut 7c is fixed. The lower end of the threaded rod 7d is screwed into the nut 7c, and the abutment 7e is attached to the upper end of the threaded rod 7d.
Middle, symbol A) abuts on the lower surface. The horizontal portion 7a has a hole 7f for allowing the anchor bolt 12 to pass therethrough.

Next, a method of mounting the slide plate 3 using the above-described angle frame 1 and a method of constructing the base isolation table will be described. First, as shown in FIG. 3, the streak 10 is projected from the structural foundation 8 (pressure-resistant panel). Further, plugs 11 for hole-in anchors are buried in the portion supporting the foot 1c and the structure base 8 at the center position of the angle frame 1 (the position below the center portion A of the angle member 2) in plan view. As shown in FIG. 2, the anchor bolt 12 is attached.

Then, the angle frame 1 is installed on the structural foundation 8 via the five anchor bolts 12. That is, each of the anchor bolts 12 located at the four corners is passed through the horizontal plate 1d of the foot 1c and attached with the nut 13.
Reference numeral 14 denotes a washer. The horizontal portion 7a of the central level adjusting member 7 is passed through the central anchor bolt 12 and fixed with the nut 15. Reference numeral 16 denotes a washer. At this time, the contact table 7e of the central level adjusting member 7 contacts the central portion A of the angle frame 1.

Next, the height and the horizontal level of the angle frame 1 are adjusted by appropriately rotating the nuts 13 and the screw rods 7d. Before and after this adjustment, the reinforcement of the seismic isolation table main reinforcement (not shown) is performed.

Next, the slide plate 3 is suspended using the suspension holes 4 opened in the slide plate 3, and is horizontally set on the installed and adjusted angle frame 1. At this time, a bolt 17 is inserted into the suspension hole 4 and screwed to the cap nut 6 to fix the angle member. FIG. 3 shows the state (the bolt 17 is not shown in FIG. 3).

The sliding plate 3 is formed by attaching a stainless steel sliding plate body 3a with an epoxy resin adhesive to a steel plate. Next, the sliding plate body 3
With the a cured, a formwork for the seismic isolation table is installed and concrete is poured. 2 and 3, the position indicated by a broken line B indicates the top position and the outer peripheral position of the concrete.

Next, after the latence is removed, grout is injected between the sliding plate 3 and the seismic isolation concrete 20 as shown in FIG. In FIG. 4, a hatched portion denoted by reference numeral D is a grout portion. Reference numeral 18 denotes the sliding plate 3
Stud bolts that are attached to the back of the base in advance to adhere to the base isolation base concrete.

Thus, the construction of the slide plate 3 and the base isolation table is completed. Next, a slide bearing (not shown) is placed on the slide plate 3. By adopting the above method, the production and transportation of the PCa plate becomes unnecessary, and the amount of grout to be filled can be reduced.

In this embodiment, since the suspension holes 4 of the slide plate 3 are used for bolt connection, it is necessary to separately process the slide plate 3 in order to fix the slide plate 3 to the angle frame 1. Absent.

Here, as the grout injection method, for example, the following method can be considered. Note that an air hole 21 is provided in the vertical portion of the angle frame 1 as shown in FIG.

The first method is that, with the gap E below the outer peripheral portion of the angle frame 1 sealed with a quick-setting material, hoses for bleeding air into nine air holes are arranged as shown in FIG. 22 is fixed, and an injection hose 23 is fixed with a quick-setting material to one of the portions cut in advance during concrete casting, and grout is passed through the injection hose 23 to the sliding plate 3.
Fill in the lower part. In addition, FIG.
It corresponds to an X sectional view.

In the second method, as shown in FIG. 7, with the gap E below the outer peripheral portion of the angle frame 1 being open, the injection hose 23 is inserted, and the sliding plate is gradually pulled while the injection hose is gradually pulled. 3 Inject grout into the lower side. In addition,
As shown in FIG. 7, a part F of the top of the seismic isolation concrete 20 is shaved to make it easy to insert the injection hose. FIG. 8 shows the arrangement of the injection hose 23 and the position of the air hole 21.

When the above two methods were actually tested, the air rate in the first method was 1.64%, and the air rate in the second method was 1.3 to 3.19%, both of which were sufficient. A filling factor was obtained.

However, the second method is more advantageous in view of the fact that a quick-setting material is not required and the labor for grouting is taken into consideration. Here, in order to improve the second method and improve the filling rate, only the central angle member 2 in the angle frame 1 is large and the lower part of the vertical portion of the angle member 2 is used as a base isolation table. The grout area may be divided into two by embedding in the concrete 20 for use.

Here, in the above embodiment, the case where the slide bearing is provided on the pressure-resistant plate 8 is described as an example, but the present invention is not limited to this. For example, the present invention can be applied to a case where a sliding bearing is provided at a position in the longitudinal direction of a pillar or at the top of a pillar. In this case, the midpoint in the longitudinal direction of the column or the column capital constitutes the structure foundation and the seismic isolation table.

[0029]

As described above, when the present invention is adopted, there is an effect that the sliding plate can be mounted at a lower cost as compared with the mounting method of driving the PCa plate.

[Brief description of the drawings]

FIG. 1 is a plan view showing an angle frame according to an embodiment of the present invention.

FIG. 2 is a side view showing a level adjustment function according to the embodiment of the present invention.

FIG. 3 is a diagram showing a state up to placement of a slide plate according to the embodiment of the present invention.

FIG. 4 is a diagram showing a grout injection position according to the embodiment of the present invention.

FIG. 5 is a partial sectional view showing an air hole according to the embodiment of the present invention.

FIG. 6 is a plan view showing an arrangement of an injection hose and an air bleeding hose in the first method according to the embodiment of the present invention.

FIG. 7 is a sectional view showing insertion of a hose in a second method according to the embodiment of the present invention.

FIG. 8 is a plan view showing an arrangement of an injection hose and an air hole in a second method according to the embodiment of the present invention.

FIG. 9 is a sectional view for explaining a conventional construction method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Angle frame 1c Foot 1d Horizontal plate 3 Sliding plate 4 Hanging hole 5 Hole 6 Cap nut 7 Central level adjustment member 7d Screw rod 8 Structure foundation 12 Anchor bolt 13 Nut B Peripheral and top ends of seismic isolation base concrete D Grout part

Claims (1)

[Claims] 1. An installation of a seismic isolation table having a sliding plate disposed on an upper surface on a structural foundation, and mounting the sliding plate in a sliding bearing structure in which a sliding bearing is mounted on the sliding plate. A method, wherein a sliding plate receiving member provided with a level adjusting mechanism is installed on the structure foundation, and the seismic isolation table is constructed with the sliding plate bolted to the sliding plate receiving member. How to install the sliding plate for the sliding bearing.