Title:
GROUND SURVEY METHOD AND GROUND SURVEY DEVICE
Document Type and Number:
Japanese Patent JP2015232221
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a ground survey method and a ground survey device in which the propagation efficiency of an impact energy due to the frictional force between an outer circumferential surface of a rod and the ground can be evaluated easily and reliably without rotating the rod, and thereby the mechanical characteristic (penetration resistance value) of the ground can be grasped with higher accuracy.SOLUTION: A load sensor 12 is incorporated to the intrusion 2 of the tip of a rod 1, and the intrusion 2 is penetrated into the ground by striking the rod 1. An amount of the penetration and a response load from the ground contacting with the intrusion 2 with the strike penetration are measured. The efficiency of energy in the intrusion depth is calculated from the amount of penetration and the response load obtained, and a penetration resistance value Nd is corrected.
Inventors:
SAWADA SHUNICHI
Application Number:
JP2014119215A
Publication Date:
December 24, 2015
Filing Date:
June 10, 2014
Export Citation:
Assignee:
OYO CORP
International Classes:
E02D1/00; G01N3/40
Domestic Patent References:
| JP2000178956A | 2000-06-27 | |||
| JPS62264207A | 1987-11-17 | |||
| JPS63156110A | 1988-06-29 |
Foreign References:
| US5313825A | 1994-05-24 |
Attorney, Agent or Firm:
Chiharu Shimizu