Sheet piling wall without enough toe-in
Sheet piling wall without enough toe-in
(OP)
Hello to everyone
I am trying to design and analyse a sheet piling wall for a project. As the site has the presence of rocks the client has found out that in some points the rock is just 200mm below the excavation level. Due to the depth of the excavation and my soil parameters,the toe-in length required to make the system stable is of about 2.0m which in this case is not possible to achieve due to the strength of the rock as our sheet piles would not go through it.
My question is: Is there any possibility to provide further stability just installing an anchor or a prop right at the bottom of the excavation to provide a lateral restraint? As there is zero passive pressure, it would help the wall to prevent the toe-in from kicking out. Additional to this, is there any way to calculate the factor of safety for this arrangement? Support-IT is not able to calculate any factor of safety for this arrangement if there is not any support (fixed or free) at the bottom of the vertical element.
If my idea is insane and not applicable for this case, could you advise for other solutions that I can carry on?
I hope to hear from you soon engineers! Thanks for your assistance.
Juan
I am trying to design and analyse a sheet piling wall for a project. As the site has the presence of rocks the client has found out that in some points the rock is just 200mm below the excavation level. Due to the depth of the excavation and my soil parameters,the toe-in length required to make the system stable is of about 2.0m which in this case is not possible to achieve due to the strength of the rock as our sheet piles would not go through it.
My question is: Is there any possibility to provide further stability just installing an anchor or a prop right at the bottom of the excavation to provide a lateral restraint? As there is zero passive pressure, it would help the wall to prevent the toe-in from kicking out. Additional to this, is there any way to calculate the factor of safety for this arrangement? Support-IT is not able to calculate any factor of safety for this arrangement if there is not any support (fixed or free) at the bottom of the vertical element.
If my idea is insane and not applicable for this case, could you advise for other solutions that I can carry on?
I hope to hear from you soon engineers! Thanks for your assistance.
Juan





RE: Sheet piling wall without enough toe-in
RE: Sheet piling wall without enough toe-in
Don't just dig to the bottom of the SSP wall to drill and install pins, anchors, or braces. The wall could kick in or fall over before you install the additional support near subgrade.
www.PeirceEngineering.com
RE: Sheet piling wall without enough toe-in
Have you considered heavy duty sheets with tips? That may do the job along with more than the usual interior bracing.
http://www.piletips.com/Sheet_Pile_Drive_Points.ht...
RE: Sheet piling wall without enough toe-in
- excavation level = 5.3m
- no groundwater
- 0-2m loose sand
- 2-4m hard clay
- <4m weathered sandstone
- bottom of sheet pile installed is 0.8m above excavation level.
- can not anchor
Please let me know if you have any suggestions about how to brace this sheet pile wall. The sheet piles have already been installed and unfortunately we were denied anchor permission.
RE: Sheet piling wall without enough toe-in
www.PeirceEngineering.com
RE: Sheet piling wall without enough toe-in
RE: Sheet piling wall without enough toe-in