Title:
ESTIMATION METHOD FOR FINE-GRAINED FRACTION CONTENT AND N VALUE
Document Type and Number:
Japanese Patent JP2014134066
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a method for estimating a fine-grained fraction content and N value from measurement values in rotating penetration test.SOLUTION: In penetration test for, when rotating a penetration rod 1 having a screw point 3 at the front end to penetrate into a ground, measuring the rotation torque and the penetration amount of the penetration rod 1 while stepwisely changing a load applied onto the penetration rod, a plurality of testing parameters are defined on the basis of the load, the rotation torque and the penetration amount and set as explanatory variables and objective variables are used as the fine-grained fraction content and the N value for executing multiple regression analysis to find a regression expression using at least one of the testing parameters as the explanatory variable. The fine-grained fraction content and the N value are estimated from the regression expression. The estimation values are approximate to actual measurement values, and so highly reliable.
Inventors:
SUEMASA NAOAKI
TANAKA TSUYOSHI
YAMATO SHINICHI
SUGANO YASUO
TANAKA TSUYOSHI
YAMATO SHINICHI
SUGANO YASUO
Application Number:
JP2013003854A
Publication Date:
July 24, 2014
Filing Date:
January 11, 2013
Export Citation:
Assignee:
NITTO SEIKO KK
JAPAN HOME SHIELD KK
SUEMASA NAOAKI
JAPAN HOME SHIELD KK
SUEMASA NAOAKI
International Classes:
E02D1/04
Domestic Patent References:
| JP2010160067A | 2010-07-22 | |||
| JPH0874240A | 1996-03-19 | |||
| JPH11200355A | 1999-07-27 | |||
| JP2002129545A | 2002-05-09 | |||
| JP2006009319A | 2006-01-12 |
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