JPS62233385A - Earthquake damping support of building or heavy machinery - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Object of the Invention and Field of Industrial Application The present invention relates to a seismic isolation support method for protecting buildings and LFF1 machinery from earthquakes.

[Prior art] Earthquake-resistant designs have traditionally been used to protect buildings or heavy Ia equipment important for safety from earthquakes, but in recent years, methods of fending off earthquakes using seismic isolation support have been adopted. It's here. Seismic isolation support refers to objects to be supported such as buildings and heavy equipment, in other words, by using elastic bodies such as rubber and springs to flexibly support the object to be supported, thereby suppressing its response acceleration and reducing friction, viscosity, etc. This is a support method that reduces response displacement by providing an energy absorption mechanism that utilizes.

A typical example of a seismic isolation support element (support device) used in this support method is a rubber 101 with iron plates 106 stacked at intervals, as shown in FIG.
is filled. Note that 103 is an upper iron plate, 104 is a lower iron plate, and 105 is a mounting hole. FIG. 7 shows a conventional example of supporting a nuclear reactor building using such a seismic isolation support element 100. In FIG. 7, reference numeral 107t is the bottom plate of a building which is a supported object, and a seismic isolation support element 100 is interposed between the lower part of this supported object 107 and a pedestal (or foundation) 108. ) of all (m).In this case, in an example of a nuclear reactor building, 6
61 seismic isolation support elements are placed at 5m intervals. In addition,
When the lower surface of the object to be supported, the part in contact with the hammered seismic isolation support element, is made of concrete (for example, the example shown in FIG. 7), an embedded plate (iron plate) 109 is usually applied to the part.

The lifespan of the support device (seismic isolation support element 100) is 30 to 4
Although it is said to last for 0 years, it may become necessary to replace it due to some circumstances (for example, changes in the material over time, wear, damage, etc.). In this case, conventionally, as shown in FIG.
By increasing the jack using F Tsuki 110,
It has been proposed to form a gap between the supported object and the support device, and to take out and replace the support device.

However, in order to pull out the rubber-based seismic isolation support element to the side as shown in the examples shown in Figures 6 and 7, the supported object must be soft, as shown in Figure 9(a). Even in this case, it is necessary to lift the compressive deformation force (X-x) of the rubber by nl from the upper layer, and the holding force becomes considerably large. Furthermore, if the rigidity of the supported object (in this example, the reactor building) 107 is large, it is impossible to partially jack up the object, and as shown in FIG. The support device (seismic isolation support element 100) must be lifted with a similar force.
cannot be exchanged. Therefore, if the object to be supported is a nuclear reactor building, it must be lifted with a force of several hundred thousand tons. There is a problem that the load when jacking up becomes too large.

Furthermore, when lifting, there is a problem that if the upper structure (object to be supported) is tilted instead of being lifted horizontally, the entire upper structure (supported object) will be displaced as shown by the arrow in FIG.

[Problems to be Solved by the Invention] This invention has been made in view of the above-mentioned circumstances, and there is no need to jack up the supported object when replacing the support device, and therefore the displacement of the supported object is reduced. The purpose of this invention is to provide a seismic isolation support method for buildings or heavy equipment that does not cause these problems.

(b) Structure of the invention [Means for solving the problem] Corresponding to this purpose, the building or ffJffi of this invention
The seismic isolation support method for equipment is characterized by supporting an object via a support consisting of a stack of seismic isolation support elements and lifting devices.

[Example] Hereinafter, details of the present invention will be explained with reference to drawings showing an example.

In FIG. 1, reference numeral 1 denotes a support body, which is a stack of a seismic isolation support element 100 and a lifting device 2. In FIG.

The part shown in the figure, that is, the gap between the pedestal (or foundation) 108 and the supported object 107, needs to be replaced, and the seismic isolation support element used up until then has been removed.
Although not shown, other parts of the supported object 107 are supported by sound seismic isolation support elements. In this case, the removal of the seismic isolation support element that needs to be replaced is
Rather than jacking up 7, the seismic isolation support element itself is crushed into small pieces and removed.

Since the support body 1 is arranged in the space obtained in this way, the height of the seismic isolation support element 100 must be smaller than that conventionally used by the height compressive deformation when the lifting device 2 is reduced. Therefore, in the case of replacing a seismic isolation support element that is already in service, use a seismic isolation support element with a lower height than the conventional one. However, in the case of a new installation, the above-mentioned restrictions do not apply, allowing for free design. The lifting device 2 is a hydraulic jack consisting of a combination of a cylinder 3 and a piston 4, as shown in FIG. ) 6 is press-fitted into the cylinder 3. Reference numeral 7 denotes an O-ring gasket for airtightly sealing the space between the cylinder 3 and the piston 4.

After the support 1 is placed on the pedestal 108 in this way, a driving medium (filling material) is introduced into the cylinder 3 from the pipe 5.
6 is press-fitted, the piston 4 moves upward as shown in FIG.
Support and drive! By adjusting the pressurized state of the 1IIJ medium (filling material) 6 while checking the pressure gauge 8, part of the load of the supported object 107 can be borne equally with other supporting parts. Note that if the valve 9 is closed at a predetermined pressure, that is, a load of 15, the filler (driving medium) 6 such as instant drying cement or epoxy resin will solidify after several hours or days, and the loaded state will continue. maintain it.

FIG. 4 relates to another embodiment of the lifting device 2,
An example is shown in which a screw jack 10 is used as the lifting device. As shown in Fig. 5, the screw jack 10 has a screw 12 inserted into a cylindrical jack main body 11. A drive ring (nut) 13 is attached to move the drive ring. Reference numeral 14 is a load seat. When using this screw jack 10 as a support for the supported object 107, after setting it in a state not shown in FIG.
This is done by rotating the screw 12 upward. In this case, the screw 12 is coated with grease, molycoat, etc. in advance to reduce friction. The drive ring 13 has a rotating handle (rod-shaped) not shown.
A handle hole 15 is provided for injecting the load, and the load can be determined by measuring the rotational torque of the handle.

Note that the screw jack is not limited to that shown in FIG. 5, and any commercially available so-called screw jack can be used. Note that after applying a certain load, if the screw 12 returns and rotates due to the influence of photographing the supported object during long-term use, the load applied to the support will change.
In order to prevent 2 from returning, it is preferable to provide a locking bolt 16 for the screw 12. Further, if the locking bolt 16 is not available, it may be fixed by another means such as welding.

In addition, regarding the stacking of the seismic isolation support element 100 and the lifting device 2, even when the seismic isolation support element 100 is located below the lifting device 2, it has exactly the same effect (I ability), and, The seismic isolation support element 100 is not limited to what is shown in the drawings, and may include springs (plate springs,
Disc springs, coil springs, etc.) or other elastic bodies can be used.

"Function" When the lifting device δ is a hydraulic jack consisting of a combination of a cylinder and a piston (however, a solidifying filler is used), a support is installed in the state shown in Figure 1, and the driving medium is placed inside the cylinder. By press-fitting the filling material, it is possible to make the support body share a predetermined load in the state shown in Figure 2. Therefore, by assimilating the driving medium (filling material), the supported object is kept in a constant state (the support body is kept at a constant state). (with a load applied to it). Further, when a screw jack is used as the lifting device, the object to be supported is supported in a constant state as described above by setting it in the state shown in FIG. 4 and applying rotational torque to the drive ring.

(C) Effects of the Invention According to the present invention, although the work of crushing and removing the seismic isolation support element that needs to be replaced is required, there is no need for any jacking to jack up the supported object, which was required in the past. Therefore, there is no problem of displacement of the supported object, and since the load applied to the support can be easily adjusted, the same load can be shared with other healthy support parts, allowing for reliable reinstallation. It is possible to obtain a seismic isolation support method that allows for

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of the support used in the method of the present invention, and FIG.
3 is a top view taken along the line A-A in FIG. 1, FIG. 4 is a vertical cross-sectional view of another embodiment of the lifting device, and FIG. is a vertical cross-sectional view of a screw jack as a lifting device, Fig. 6 is an explanatory diagram of a seismic isolation support element, Fig. 7 is an explanatory diagram of a conventional support method using a seismic isolation support element, and Fig. 8 is a conventional support Figure 9 is a diagram illustrating the procedure for replacing the seismic isolation support element in the method, Figure 9 is a diagram showing the difference in jack-up when the supported object is soft and rigid, and Figure 10 is a diagram showing the difference in jack-up when the jack-up is uneven. It is a figure which shows the displacement of a supported object. 1... Support body 2... Lifting device 3...
Cylinder 4...Piston 6...Driving medium (
Filling material) 10...Screw jack 100...
・Seismic isolation support element 107...supported object 108・
...Pedestal (or base 1i!i) Patent applicant Central Research Institute of Electric Power Industry Mitsubishi Heavy Industries, Ltd. Mitsubishi Atomic Crab Industry Co., Ltd. Representative Patent Attorney Osamu Kawai Figure 1 Figure 2 Figure 3 Figure 4 Figure 7 Figure 8 +10 ? 1 G Figure 9 (Q) Figure 9 (b)

Claims (1)

[Claims] 1. A seismic isolation support method for a building or heavy equipment, characterized in that a supported object is supported via a support consisting of a stack of seismic isolation support elements and lifting devices.