Liquefaction phenomenon prediction system

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United States of America Patent

PATENT NO 6694815
APP PUB NO 20030177834A1
SERIAL NO

10387636

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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To predict residual settlement quantity and residual horizontal deformation quantity of ground where a liquefaction phenomenon has occurred due to earthquake. Soils in situ (stratum B to stratum D) are sampled from ground, and are made to be element test object stratums. A stratum whose characteristic is well-known, or the like may be substituted for a numerical model (stratum A). Next, setting of input conditions is performed, and vertical stress, horizontal stress and initial shear stress, which are equivalent to applied load that the ground at a depth of the point suffers, are worked on to each stratum. This recreates a stress status of soil before earthquake occurs. Then, shear displacement and the movement quantity of interstitial water by earthquake are given to the test piece, and the quantity of shear stress and pore water pressure, which have occurred, is obtained. In the element test execution stratum, displacement computed for stratum element and the movement quantity of interstitial water are actually given to each element to measure restoring force and the pore water pressure. By sequentially repeating the steps, it is possible to simulate the behavior of the liquefaction phenomenon.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
TOHOKU TECHNO ARCH CO., LTD.MIYAGI26

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kazama, Motoki Sendai, JP 1 1
Sentou, Noriaki Sendai, JP 1 1
Yamaguchi, Akira Tagajyou, JP 278 3054

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