JPH0229169Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a seismic isolation structure constructed by installing a seismic isolation device on top of a pile.

(Problem that the invention aims to solve) Seismic isolation structures are usually constructed by installing seismic isolation devices on pine slabs that are thick enough to support the superstructure. The parts other than where the seismic device is installed are not directly subject to the load of the superstructure, so they are idle, which is uneconomical.

Therefore, if we adopt a structure in which the seismic isolation device is installed on the piles instead of the mats, the pile heads will be connected with beams because it is necessary to integrate the piles and ensure the installation of the energy absorption device that is used in conjunction with the seismic isolation device. Even in this case, the number of frames of the support structure increases.

This idea was made with the aim of streamlining the support structure of such base isolation structures, and attempts to achieve this by making the support structure omit the beams that connect the pile heads.

(Means for solving the problem) In this invention, we focused on the fact that the force acting on the pile head during an earthquake is small in a base isolation structure constructed by installing a base isolation device on the pile head. is a structure in which the beam between the pile heads is omitted.

The pile is buried under each pillar of the building, and a pile cap is formed above the pile with an area that allows installation of at least a seismic isolation device and an energy absorption device.

Then, a building is constructed by installing a seismic isolation device and an energy absorption device on top of the pile, and a seismic isolation structure is constructed by interposing the seismic isolation device between the pile cap and the building foundation, and the energy absorption device between the pile cap and the foundation beam. Configure.

(Example) The present invention will be described below based on drawings showing an example.

The seismic isolation structure A of this invention is constructed by interposing a seismic isolation device 2 and an energy absorption device 3 between a building a and a pile 1, as shown in FIGS. 1 and 2.

The pile 1 is buried below the pillar 4, and a pile cap 1a on which a seismic isolation device 2, an energy absorption device 3, etc. are installed is formed on the top of the pile.

Building a is constructed by installing a seismic isolation device 2, an energy absorption device 3, and, if necessary, a fall buffer device 5 on this pile cap 1a. At this time, the seismic isolation device 2 is installed between the pile cap 1a and the foundation 6, the energy absorption device 3,
The fall buffer device 5 is located between the pile cap 1a and the foundation beam 7.

The embodiments shown in FIGS. 1, 3, and 5 are cases in which prefabricated piles are used as the piles 1. In this case, a group of piles 1 buried under one pillar 4 are integrated, and various devices are installed. A pile cap 1a that can be installed is formed. Fifth
The figure shows the details.

In the embodiments shown in Figs. 2, 4, and 6, a cantilevered pile cap 1a is formed on the head of a pile 1, which is formed by a cast-in-place concrete pile, a deep foundation pile, etc., for installing various devices. This is what I did. In this case, concrete is poured for the head of one pile, and the necessary reinforcement is arranged to form the pile head 1a. This embodiment is a case in which the minimum necessary pile cap 1a for installing the device is formed, but it goes without saying that the pile cap 1a of the same size as in the previous embodiment may be used.

(Effects of the idea) As mentioned above, this idea directly supports the load of the building with the piles, eliminating the need for beams to connect the piles, which greatly simplifies the building's support structure and reduces construction costs. be able to.

[Brief explanation of drawings]

1 and 2 are sectional views showing an embodiment of the present invention, and FIGS. 3 and 4 are plan views thereof.
FIGS. 5 and 6 are a sectional view and a front view, respectively, showing details of the pile cap. A: Seismic isolation structure, a: Building, 1: Pile, 1a: Pile head, 2: Seismic isolation device, 3: Energy absorption device,
4: Column, 5: Fall shock absorber, 6: Foundation, 7: Foundation beam.

Claims (1)

[Scope of utility model registration request] A pile is buried under each pillar of the building, and a pile cap with an area large enough to install at least a seismic isolation device and an energy absorption device is formed on the top of the pile.
A seismic isolation structure in which a building is constructed by installing a seismic isolation device and an energy absorption device on the pile head, interposing the seismic isolation device between the pile cap and the building foundation, and interposing the energy absorption device between the pile cap and the foundation beam.