JP2009133163A5

JP2009133163A5 -

Info

Publication number: JP2009133163A5
Application number: JP2007311734A
Authority: JP
Filing date: 2007-11-30
Publication date: 2010-06-17
Anticipated expiration: 2027-11-30

Claims

In the impact penetration test method of applying a predetermined number of impacts to the penetration rod and determining the ground properties from the penetration amount,
An impact penetration test method characterized by detecting and accumulating an amount of penetration for each impact and determining a ground property based on the accumulated detection data.

2. The impact penetration test method according to claim 1, wherein the ground property is determined from a change in penetration amount for each impact.

  A striking unit that guides the hammer so that it can be raised and lowered,
  A penetrating rod that penetrates into the ground after being hit by this hammer,
  A penetration amount detecting means for detecting a penetration amount of the penetration rod for each hit by the hammer;
  A control unit for accumulating the intrusion amount for each impact detected by the intrusion amount detecting means and determining the ground property based on the accumulated detection data;
A striking penetration test apparatus comprising:

A striking unit that guides the hammer so that it can be raised and lowered,
  A penetrating rod that penetrates into the ground after being hit by this hammer,
  A lifting platform that supports the penetrating rod;
  Load changing means for applying a predetermined load to the lifting platform;
  A penetration amount detecting means for detecting a penetration amount of the penetration rod for each hit by the hammer;
  A control unit for controlling the operation of the penetration changing means and the percussion unit according to the permeation amount detected by the penetration amount detection means;
A striking penetration test apparatus comprising:

5. The control unit according to claim 4, wherein when the penetration amount of one hit detected by the penetration amount detecting means is less than a preset minimum penetration amount, the control unit pauses the hit by the hit unit. Blow penetration test equipment.

When the control unit detects that the amount of penetration per one stroke detected by the penetration amount detection means exceeds a preset maximum amount of penetration, the control unit temporarily stops striking by the striking unit and loads applied to the penetrating rod The impact penetrating test apparatus according to claim 5 or 6, wherein the load changing means is controlled to reduce the load.

The impact penetration test apparatus according to any one of claims 4 to 6, wherein the control unit includes a display unit that displays an amount of penetration for each impact.