Ohbayashi Corporation

Chubu Electric Power Company, Inc.

Yozo Goto

Makoto Hayakawa

Shigeki Tsuchiyama

Tadao Koide

Tamotsu Endoh

Joji Ejiri

Tadao Sugimoto

Makoto Toriihara

A conglomerate layer is formed horizontally on a base of ground which has a high water permeability and easily liquefies. A bottom plate is formed on the conglomerate layer to construct the underground structure thereon. One or more drainpipes are extended upwardly from the conglomerate layer through the bottom plate for draining excessive pore water in the ground.

Method of protecting underground structures in ground liable to be

A conglomerate layer is formed in ground which has a high water permeability and is liable to be liquefied. An underground base of the structure is constructed on the conglomerate layer. One or more drainpipes are extended substantially horizontally from the conglomerate layer through the underground base so as to communicate with the surface of the ground.

Method of protecting a structure constructed on ground liable to be

A seismic isolator for absorbing earthquake vibrations is provided which comprises a laminated member arranged to be interposed between a structure and a foundation, the laminated member comprising thin steel sheets having concavities and convexities extending in a single direction, flexible sheets stacked alternately with the steel sheets, and upper and lower end plates, all these sheets and plates being unitarily and fixedly bonded together. The upper and lower end plates are fixed to the structure and the foundation, respectively, in such a manner that the concavities and convexities extend in a direction in which earthquake vibrations are to be isolated from the structure. The seismic isolator of the present invention is particularly suitable for use with a bridge.

Seismic isolator

Growing community of inventors

Tokyo, Japan

Yozo Goto