Title:
POSITION DETERMINING METHOD OF CAVITY PART OR SOFT PART IN GROUND
Document Type and Number:
Japanese Patent JP2023170035
Kind Code:
A
Abstract:
To provide an accurate and reliable position determining method of a cavity part or a soft part in ground, and a depth region.SOLUTION: A position determining method comprises the steps of: measuring three parameters of the load current value of a speed reducer at the penetration depth of a drilling machine for precedently drilling ground, pressing load obtained by subtracting a suspended load from the weight of a drilling shaft of the drilling machine and drilling speed of the drilling machine, at every set time lapse; plotting the three parameters related to the penetration depth of the drilling machine after the measured values for every set time lapse are subjected to moving average processing; and determining, regarding the three plotted parameters corresponding to the penetration depth of the drilling machine, the position of a hollow part or a soft part in the ground, by comparing a value calculated by excluding the pressing load from the load current value and by excluding the drilling speed, with a threshold set in advance.SELECTED DRAWING: Figure 1
Inventors:
SHIIBA TAKEHISA
OMURA KEISUKE
SHIRAI KENTARO
OGINO HISAKAZU
TAOMURA OSAMU
MAEDA SOSUKE
OMURA KEISUKE
SHIRAI KENTARO
OGINO HISAKAZU
TAOMURA OSAMU
MAEDA SOSUKE
Application Number:
JP2022081476A
Publication Date:
December 01, 2023
Filing Date:
May 18, 2022
Export Citation:
Assignee:
TAKENAKA DOBOKU
International Classes:
E02D1/02
Attorney, Agent or Firm:
Takao Osashima