Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
PENETRATION TESTING MACHINE FOR DRILLING ROD CONNECTION, AND PILE CONSTRUCTION MANAGEMENT METHOD
Document Type and Number:
Japanese Patent JP2017186850
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide means for saving labor for re-doing pile erection due to lack of load bearing capacity, by determining the load bearing capacity of the ground at a hole bottom immediately after forming a pile hole in the ground.SOLUTION: A hammer casing 2 is fitted inside an outer casing 1, the hammer casing being movable up and down. A penetration shaft 3 protruded at a bottom end of the hammer casing 2 is protruded downward and outward from bottom end-side openings 12a, 12b of the outer casing 1. Sealing means 4, 5A, 5B are provided for sealing the bottom end-side openings 12a, 12b from the outside. A connection part 9 is provided at a top end of the outer casing 1. The hammer casing 2 has a built-in drive hammer 22 and hoisting mechanism, the drive hammer falling freely and striking a knocking block at a bottom end, and the hoisting mechanism hoisting and then releasing downward the drive hammer 22 after having fallen. A load bearing capacity of the ground at a hole bottom is measured based on a number of times the drive hammer 22 needs to strike, for having the penetration shaft 3 penetrate to a prescribed depth into the ground at the hole bottom.SELECTED DRAWING: Figure 2

Inventors:
KASHIMOTO TAKAHIKO
MIYAI TOSHIKAZU
Application Number:
JP2016078302A
Publication Date:
October 12, 2017
Filing Date:
April 08, 2016
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
OAK:KK
International Classes:
E02D1/00; E02D13/06
Attorney, Agent or Firm:
Hiroshi Masaki
Yuko Mikami
Tadashi Fujikawa