JP2007120271A - Base isolation retrofit construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To contribute to a house industry by increasing a demand for remodeling work of an existing house by the synergistic effect of constructing this method by solving " an aseismatic method of an existing nonseismic house " of the most preferential problem in " Central Disaster Prevention Council " of a Cabinet Office of Seismic Great Nation of Japan by a base isolation retrofit construction method. <P>SOLUTION: A conical part 2, a defective spherical recess and a stopper 4 are arranged on a plate, and a pan type board lower bearing 1b for a base isolation device processed in a pan type board is arranged in an upper part of an existing foundation 6, and an additionally driving foundation 7 is arranged in its lower part, and a steel ball 8 is placed on this foundation, and a pan type board upper bearing 1a for the base isolation device rotated by 180 degrees is arranged on its ball, and a bearing 9 for a sill is fixed to this bearing. A fixing insert 15 of an anchor bolt 16 of a cat 13 provided with a through-hole for fixing the lower bearing 1b to the existing foundation by a bolt 10 and a nut 11 is also arranged, and a rib plate 18 of the cat 13 provided with the through-hole for fixing the bearing 9 for the sill to an existing sill 14 is arranged on the upper bearing 1a, and a floor slab for sticking a rigid floor is formed on the existing sill by structural plywood 17. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

    The present invention relates to a house with a seismic isolation device installed in a building such as a detached house.

  Earthquake-powered homes with seismic isolation devices in Japan began to be developed and sold by major housing manufacturers and general contractors after the Hyogoken-Nanbu Earthquake. Of the 24.5 million existing wooden houses, 111.51 million non-seismic existing wooden houses have to be repaired or replaced with bearing walls for reinforcing blades that reinforce bearing walls and columns and beams with hardware. Has been.

  Despite Japan's major earthquake countries, the development of seismic isolation devices for existing houses is difficult and economically unprofitable, so the development of seismic isolation devices for detached houses and seismic isolation retrofit methods The current situation is not progressing, and there is an urgent need to develop an inexpensive existing seismic isolation device.

  In order to install seismic isolation devices in existing detached houses, the same construction method as for high-rise buildings is used. 1 The foundation is separated from the foundation of existing homes. 2 The existing homes are jacked up. There is a method of installing a foundation for the above, setting 4 seismic isolation devices on it, providing 5 bases on it, and fixing the base of the existing house jacked up to this base.

  The small-scale building seismic isolation device is the 1924 patented Kenzaburo Kito's plate-type disk and the building's seismic seismic device. Many are used.

  The mainstream of seismic isolation devices for detached houses is a rolling method combining a plate-shaped board and a sphere, a ball bearing and a hydraulic damper, and a method of sliding a plate or the like.

Problems to be solved by the invention

  The conventional method of installing seismic isolation devices such as a plate and a sphere and an oil damper in an existing house must separate the foundation and foundation of the house.

  It is necessary to jack up the existing house from which the foundation has been separated to a height that allows the installation of the exemption equipment and gantry.

Must provide a foundation for seismic isolation devices

On top of the foundation, set up a plate-shaped plate support and a sphere-based seismic isolation device

A gantry must be installed on the seismic isolation device

Must be jacked down to secure the foundation of the existing house to the gantry

The frame and the foundation of the existing house must be fixed with connecting hardware

The foundation and foundation of the existing house must be covered with exterior materials

Need anti-sway device such as typhoon

The installation work period is long and the furniture on the first floor etc. must be moved during the construction period, and the owner must also reside temporarily

Large equipment such as seismic isolation devices with upper and lower plate molds and spheres, oil dampers, and anti-sway devices with wind, etc., equipment costs and installation costs are high, and there are problems such as maintenance.

Means for solving the problem

In order to solve the problems as described above, in the present invention, the upper end of the existing foundation of the construction site is cut with the mounting dimensions and the movable portion of the seismic isolation device. (See Figure 5)

Bolt holes for fixing are provided on the existing foundation at the position where the plate-made platen lower support is attached.

The base of the existing house is reinforced with L-shaped steel base support, and the upper plate support is fixed. (Ohiki is reinforced with laminated wood, and a structural plywood is put on the base and the hauling to make it a rigid floor.)

Place level mortar on the upper end of the existing foundation at the place where the plate-shaped plate is supported.

Attach the bottom support of the plate-type board with the ball structure set to the upper end of the level mortar of the existing foundation, insert the bolt into the fixing bolt hole of the existing foundation, and attach the plate-type dish support with the nut. Fix it.

Assemble the formwork and place concrete in the lower part of the bottom support of the plate mold.

After the concrete at the construction site develops strength, remove the existing mortar from the top of the existing foundation of all existing houses.

Cut off the anchor bolts between the foundation tops and the foundations of all existing houses.

Fix to the existing foundation so that the slide plate is in contact with the lower end of the base of the pillar that does not have a plate-shaped plate support and the gap between the mold foundation, and fix the slide plate and the base support to slide. To make a slip-isolation device method.

The invention's effect

Since the dish-shaped board support is provided with a missing ball-shaped depression and a stopper, a damper and a wind-swing prevention function are produced, and a damper and a wind-swing device are not required.

There is no need for dampers and foundations for rocking devices, and large foundations for seismic isolation devices (solid foundation floor thickness of 25 cm or more) are also unnecessary.

Since the existing foundation and the large fork are formed with a rigid slab flooring made of structural plywood, etc., a gantry (concrete slab of 18 cm or more) that fixes the foundation is unnecessary.

The seismic isolation plate support can be constructed by cutting the top of the existing foundation and inserting it into the bottom of the foundation, eliminating the need for jacking up existing houses.

The seismic isolation device is a construction method that fixes the extra foundation and L-shaped steel base support to the existing foundation and foundation, so there is no need for large foundations and foundations, and there is no need for large foundations, foundations and jack-ups. And construction and construction period are unnecessary.

Because there is no need to jack up existing houses, partial construction is possible, and users can work without temporary housing.

Because there is no need for temporary housing, the expense is not required.

The seismic isolation work is simple because small-scale work such as plate-type plate support and L-type steel base support is sufficient.

Since the seismic isolation work is a small-scale work such as plate-type plate support or L-shaped steel base obstacle, the construction cost is low.

Non-earthquake-resistant existing houses can be made seismic-isolated houses without reinforcement work with bearing walls.

  Since the structure of the plate-shaped platen plate support is simple and can be manufactured by pressing and welding the plate, it can be manufactured at low cost because advanced technology is not required.

  If a seismic isolation device is installed at the time of construction of a new house, a new seismic isolation device house can be constructed at a low price.

A plate-shaped lower plate support 1b (see FIG. 2) for a seismic isolation device, which is provided with a conical portion 2, a spherical recess 3 and a stopper 4 on a plate and processed into a plate-shaped plate, is placed on the upper portion of the existing foundation 6. An additional foundation 7 is provided at the lower part, a steel ball 8 is placed on the foundation, and a top plate 1a for the seismic isolation device rotated 180 degrees is provided thereon, and the base support 9 is fixed thereto. Seismic isolation retrofit method (see FIG. 3) Note that a cat 13 having a through hole 12 for fixing the base support 1b for the seismic isolation device to the existing foundation 6 with the bolt 10 nut 11 and an insert 15 for fixing the anchor bolt 16 The base plate 14 is provided with a through-hole 12 for fixing the base L-shaped steel support 9 to the existing base 14 and the rib plate 18. Form a rigid slab flooring with a structural plywood 17 etc. (Refer to Figs. 4 and 5) In addition, the slide plate base support is fixed to the existing foundation so that the slide plate is in contact with the gap between the lower end of the pillar base support and the foundation of the existing house that does not have a plate-shaped plate support. Fix to slide (see FIG. 6).

A base 1 for a seismic isolation device provided with a conical portion 2, a spherical recess 3 and a stopper 4 (see FIGS. 1 and 2).

The upper end of the existing foundation at the construction site is cut in accordance with the installation dimensions and movable parts of the seismic isolation device. (See Figure 5)

Bolt holes for fixing are provided on the existing foundation at the lower plate mounting position of the plate-shaped plate.

The base of the existing house is reinforced with L-shaped steel base support, and the upper plate support is fixed. (Ohiki is reinforced with laminated lumber, etc., and a structural plywood is placed on the foundation and hauling to make it a rigid floor)

Place level mortar on the upper end of the existing foundation at the place where the plate-shaped plate is supported.

Attach the bottom support of the plate-type board with the ball structure set to the upper end of the level mortar of the existing foundation, insert the bolt into the fixing bolt hole of the existing foundation, and plate the plate-shaped platen base support with the nut To fix.

Assemble the formwork and place concrete in the lower part of the bottom support of the plate mold.

After the concrete at the construction site develops strength, remove the existing mortar from the top of the existing foundation of all existing houses.

Cut off the anchor bolts between the foundation tops and the foundations of all existing houses.

Fix the existing foundation so that the slide plate is in contact with the gap between the bottom of the pillar base support and the foundation, which does not have a plate-shaped plate support, and make it a sliding seismic isolation device using the slide plate and the base support. .

  Since the structure of the bearing is simple and can be manufactured by pressing and welding plates, etc., advanced technology is not required, so seismic isolation devices can be manufactured at low cost. The existing non-base-isolated house can be made a seismic isolation retrofit by fixing the existing foundation with a fixed base and reinforcing the foundation.

  In earthquake-prone countries in Japan, earthquake resistance measures for existing houses are inadequate, so existing houses can be constructed in the latest seismic isolation equipment with the existing seismic technology without reinforcing them with bearing walls, and the construction costs are low and the latter period is short. A synergistic effect with re-home construction can also be expected, and all non-base-isolated houses constructed in the future can be made into this construction method market, so the economic effect on the housing industry is great.

Plan view of seismic isolation device lower support in Example 1 Sectional view of the base isolation lower part support of Example 1 Sectional view of the seismic isolation device upper bearing of Example 2 Cross section of construction of seismic isolation device of Example 2 Construction elevation of seismic isolation device of Example 2 Construction part perspective view of the sliding bearing device of Example 2

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seismic isolation plate support 10 bolts 1a Plate upper plate support 11 Nut 1b Plate lower plate support 12 Penetration 2 Conical part 13 Cat 3 Missing spherical recess 14 Existing base 4 Stopper 15 Insert 5 Level mortar 16 Anchor bolt 6 Existing foundation 17 Structural plywood 7 Additional foundation 18 Rib plate 8 Steel ball 19 Existing pillar 9 Base support 20 Slide plate

Claims (2)

Base for seismic isolation device with conical section 2, missing spherical recess 3, and stopper 4, processed into a dish mold (see Figs. 1 and 2) The lower support 1b of the base isolation device support 1 according to claim 1 is placed in contact with the upper part of the existing foundation 6 and an additional striking foundation 7 is provided at the lower part, and a steel ball 8 is placed on the upper part of the lower support 1b, On top of that, the seismic isolation retrofit method (see FIGS. 4 and 5) is provided with an upper support 1a obtained by rotating the base isolation device support 1 formed in claim 1 by 180 degrees and a base support 9 fixed thereto. )

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