Title:
PENETRATION TEST METHOD
Document Type and Number:
Japanese Patent JP2010160067
Kind Code:
A
Abstract:
To provide a penetration test method for detecting a load applied to a screw point and a rotational load torque during a rotation by considering a circumferential friction of a rod.
A plurality of the loads are applied to the penetration rod 4 in units of a predetermined depth to detect each load Wa and the corresponding rotational load torque Ta, and the circumferential friction of the rod 4a is calculated from the load Wa and the rotational load torque Ta based on a torque Trm when the penetration rod 4 is pulled up and rotated in the predetermined depth, and excluded to calculate the load W applied to the screw point 4b and the rotational load torque T.
COPYRIGHT: (C)2010,JPO&INPIT
Inventors:
SUEMASA NAOAKI
TANAKA TAKESHI
YAMATO SHINICHI
SEKIGUCHI KAZUTOMI
TANAKA TAKESHI
YAMATO SHINICHI
SEKIGUCHI KAZUTOMI
Application Number:
JP2009002712A
Publication Date:
July 22, 2010
Filing Date:
January 08, 2009
Export Citation:
Assignee:
NITTO SEIKO KK
JAPAN INSPECTION ORGANIZATION
SUEMASA NAOAKI
JAPAN INSPECTION ORGANIZATION
SUEMASA NAOAKI
International Classes:
G01N3/40; E02D1/02
Domestic Patent References:
| JP2007321385A | 2007-12-13 | |||
| JP2001226949A | 2001-08-24 | |||
| JP2005264651A | 2005-09-29 |
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