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

Free wall with a height of 15 m

Free wall with a height of 15 m

Free wall with a height of 15 m


we have to design a free wall with a height of 15 m.  There are no ground pressures on the wall, only the wind.  At 2 m of the wall, there is a sewer (depth 2 m, radius 0.5m).  The ground at the site is bad (soft clays,... in the first 6 m, then loosely packed sand for 3.5 m, then a good layer of sand of 3 m).  The wall is asides the railroad (vibrations).

This wall is about 1 km long.  It is in a coastal area, not much buildings in the area, so the wind can be quite strong (design value approx. 1.5 kN/m²).

I am thinking of using a type of berlinerwall, where we vibrate steel H-beams (e.g. HEB-300) in the ground every 4 or 5 m.  Between these beams we can place prefabricated concrete plates.  

Of course, the people I work for want a cheap design.  Are there according to you guys cheaper methods of constructing this wall?  Do you see problems in a design as a berlinerwall?

Thanks a lot,

RE: Free wall with a height of 15 m

Is this a sound wall?

Please see FAQ731-376 for great suggestions on how to make the best use of Eng-Tips Fora.

RE: Free wall with a height of 15 m

To Focht3:

It's not a sound wall.  The wall is around a place to stock sand, lime, ... (I don't know the english term).  It is placed on a new area for industrial activities.  The city is concerned they won't attract industry if the dust is blowing in the wind.  So they obliged the firm to build a 15 m wall.  I think there is a little bit of political vendetta between the city and the firm, but that doesn't concern me.


RE: Free wall with a height of 15 m

Okay, it's really a screen of sorts.  Where is the site?

Do you have to use concrete?  I'd suggest a look at aluminum or similar lightweight material, unless you think the locals might take shots at it...then use lightweight concrete.  Or steel plate.   

The principal load will be lateral - mostly the moment because of the eccentricity.  You need to get good shear strength and soil profile information for the top 3 or 4 meters along the fence alignment.  I would suggest that you use p-y curves to model the soil behavior.  They are non-linear and do a good job of predicting the maximum bending moments.  Deflection is another matter: none of the current methods is very good at predicting deflection behavior, particularly at working loads.  If deflection is an issue, you might consider braces or tie-downs to control deflection.

P.S. Your English is quite good -

Please see FAQ731-376 for great suggestions on how to make the best use of Eng-Tips Fora.

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 - Integrating the Engineering Ecosystem
Aras Innovator provides multiple options for integrating data between systems, depending on the scenario. Utilizing the right approach to meet specific business requirements is vital. These needs range from authoring tools, federating data from various and dissimilar databases, and triggering processes and workflows. Download Now
White Paper - Industry 4.0 and the Future of Engineering Education
With industries becoming more automated, more tech-driven and more complex, engineers need to keep their skills and knowledge up to date in order to stay on top of this wave—and to be prepared for the Industry 4.0 future. The University of Cincinnati offers two online Master of Engineering degree programs designed specifically for practicing engineers. Download Now
eBook - The Design Gridlock Manifesto
In this eBook, you’ll learn 6 ways old CAD technology slows your company down and hear how design teams have put those problems to rest. “The Design Gridlock Manifesto” shares first-hand modern CAD experiences from 15 companies around the world. Download Now
White Paper - Comparing Multi-Patterning at 5nm: SADP, SAQP, and SALELE
Self-aligned multi-patterning techniques such as SADP, SAQP, and SALELE are increasingly popular at advanced nodes, but each process has its pros and cons. IMEC and Mentor, a Siemens business collaborated to identify potentially less-obvious process and design limitations and trade-offs between the three SAMP techniques. Learn more in this paper. 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