Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


Vibrating wire piezometer dry

Vibrating wire piezometer dry

Vibrating wire piezometer dry

Hi, I have to install an array of VWP's along the base of an old opencut quarry (approx. 90m deep)that is going to be filled with engineered fill. (houses built above) there will be there to monitor the infiltration rate and pore pressures. The only problem is that the Piezometers I am used to all need water in the filter during installation. It might be months before the water table (if it ever does) infiltrates to the VWP's (laid in a trench). And am concerned that they will dry out and when the water does eventually get to the VWP's the air bubble between the mesh and the sensor will remain and the data will be useless. will water eventually soak in through the Mesh (steel or ceramic)??(I didn't think it would)Ideas??

RE: Vibrating wire piezometer dry

Air bubbles will not affect the reading. The pressure in an air bubble is equal to the water pressure surrounding the bubble. But if the soil is dry, there is no pore pressure.

RE: Vibrating wire piezometer dry

Thanks for the reply. I have just been told that it could take up to a year for the water table to interact with the VWPs. So I was worried that if the VWP's small reservoir of water dried through capillary action or other action that when the WT eventually came that the data would be not accurate.

RE: Vibrating wire piezometer dry

Drying of the filter stone is a problem. One option would be to grout the piezometer in-place.

I suggest you talk with the manufacture and get their suggestion(s).

Mike Lambert

RE: Vibrating wire piezometer dry

Place the piezometer in the water tank covered by geotextile and sandy gravel to avoid clogging.

RE: Vibrating wire piezometer dry

Thanks for the replies. I'll keep updating with my progress. Cheers

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


eBook - Manufacturing the Cars of Tomorrow
In this ebook, we'll explore how additive manufacturing is going to transform the way cars are made. This includes commentary from thought leaders such as Ford's CTO, Ken Washington, Customer case studies of ways 3D printing is being used today, and a variety of part examples where 3D printing is already impacting how automobiles are made. Download Now
White Paper - Smart Manufacturing for Semiconductor
New technologies and approaches present great opportunities for semiconductor manufacturers to achieve high levels of innovation, yield and improvement. This white paper explores some of these cutting-edge technologies and how they can be applied effectively in the semiconductor industry. Read about how Smart Manufacturing is transforming the semiconductor industry. Download Now
White Paper - Analysis and Simulation in Aircraft Structure Certification
Organizations using simulation and analysis tools effectively see the benefits in their ability to achieve certification faster and with drastically less total cost than those who do not maximize these tools. Read this White Paper to learn about how digital tools such as analysis and simulation help in aircraft structure certification. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close