×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

Jobs

Water pressure on sheet piles

Water pressure on sheet piles

Water pressure on sheet piles

(OP)
Hey all, Im designing a cofferdam for the construction of a pad 3.5m x 3.5 m pad foundation, therefore a short term structure. Cofferdam is to be circular. The ground is a fully saturated sitly clay, fairly dense. there is a river about 300m away.

In determining water pressures, my guess is that there will be no significant seepage of water into the excavation during the construction since it is only short term and the permeability is very low.

does this seem a reasonable judgement?


 

RE: Water pressure on sheet piles

No, it's not reasonable. Irrespective of short-term conditions, the pore pressure at the base of the excavation will be high.  The relief of this pore pressure will lead to instability.  You need to consider the flow net conditions to minimize critical gradients at the base (and minimize base heave).  This is one element of stable cofferdam design that needs to be considered.  Earth pressures being another element of design.

Interesting project!

f-d

¡papá gordo ain't no madre flaca!

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!


Resources