Borehole strainmeter installation in japan
Sponsored Links
This presentation is the property of its rightful owner.
1 / 7

Borehole Strainmeter Installation in Japan PowerPoint PPT Presentation


  • 98 Views
  • Uploaded on
  • Presentation posted in: General

Borehole Strainmeter Installation in Japan. As told to E. Roeloffs by Dr. Y. Kitagawa and Dr. N. Matsumoto, Geological Survey of Japan. General procedure. Immediately after drilling hole, open-hole installation interval is filled with grout

Download Presentation

Borehole Strainmeter Installation in Japan

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Borehole Strainmeter Installation in Japan

As told to E. Roeloffs by

Dr. Y. Kitagawa and Dr. N. Matsumoto,

Geological Survey of Japan


General procedure

  • Immediately after drilling hole, open-hole installation interval is filled with grout

  • Grout is allowed to cure, then the hole is reamed and the core retained for inspection

  • Hole is packed off and fluid pressure is monitored overnight. Pressure change must be less than a certain value for installation to proceed

  • If grout core is unsatisfactory or pressure change is too great, interval is re-filled with grout and the procedure is repeated

  • Final installation is done with a thin grout for an extended working time of 24 hours


TYS: Core from first grout job


TYS: Core from second grout job


TYS: Satisfactory core from fourth grout job


  • Login