Sheet Pile Installation

Have to agree with Lyn, hire an engineer and get design proposal drawn up. Site investigation report & borehole logs will be needed. The company i work for have carried out a similar project in retaining a 160m raised rail embankment by sheet piling both side of the rail line and installing tie rods under the track to tie the structure together with whaler beams.. the distance was 3m between the piles. However we had to drive the piles opposite each other, as opposed to along one side and then along the other side. this was because there was a danger the embankment would shift if all the piles were driven on one side. the rail line was in use during the day and works carried out an night. Track monitoring had to be carried out during & after the project.

There are a lot of considerations here such as the reason for the wall, ground conditions, modulus of elasticity of the piles, cold formed or hot rolled piles (2 completely different species) , the type of clutch proposed, loading on the piles, loading of the machine & piling hammer on the ground while driving piles if applicable.

It can be done safely but not without a proper design proposal.. I know many companies selling sheet piles will do the design calcs & analysis if you provide and SI report & basic information. I know from personal experience this analysis can be cost saving as they recommend alternatives to what is proposed and result is less tonnage of piles.

"Serious replies please."

"Thank you All."

You are most certainly welcome!

Seriously, you need to hire a Civil Engineer experienced in sheet piling, as well as a Geotechnical Engineer.

I would not do this installation without their explicit involvement....

Shouldn't your question be: "Do I really want to be personally responsible for the loss of life and/or property should this fail because I was going on the unqualified advice of complete and total strangers whom I found on the Internet?" Not even CLOSE to the Serious Reply I would have posted were it not for the judicial use of this-here backspace key...

The Real Question is "Why are you willing to take such a risk *at all*?" You wanted serious replies only, yes?

Can it be done, yes, should it be done without checking in detail with the local authorities, codes, standards and civil designers who know the job, no.

As to serious answers, the question should be serious also, since what you are asking may require code violations that can harm the people giving the answers as well as those who do the work afterward.

Also since you give so little information the answers will always be generic.

Advice in prior replies is completely sound ... especially bringing-up the fact that the original post fails (quite miserably) in providing sufficient data to 'crunch'.

Is there any coating or cathodic protection on the existing sheet piling? (if not, why not?).

Were you to be involved in the subsequent install, would there be any (coating/cp) in the plans for IT ...?

As stated, a CE with experience in the local hydrological conditions etc is MOST warranted for tackling such a project. (Out of sheer, utter curiosity, does "your" plan carry intention of placing 'filler material' between the sheets, 2m apart...? And, assuming so ... what...?)

The Existing sheet pile in addition to coating also has cathodic protection and so does the new proposed one with factory applied coating and two sacrificial nodes to be provided on site.

I was involved in the design and am also involved in the installation. Yes, there is going to be a fill material in the 2 mts between the sheets.

Regards

Ninestein

Thank you All for the responses.

I am a Civil Engineer having been involved in the design and now in the construction stage of this project.

All the design parameters : bathymetric survey, geotechnical investigation-geological and geophysical surveys, EIA studies were conducted and the designs approved for construction

This challenge came up during construction as site modification requires that work must extend to the edge of an existing Quaywall on sheet pile. Hence a distance of 2mtrs is proposed.

My quest for suggestion is on the effect of installing another anchored sheetpile wall directly opposite the existing one 2mts away considering the passive pressure that will develop between the 2 walls after installation.

I have not done this before, I mean having 2 sheetpile walls this close. Hence my quest for suggestion from those who have had the experience or who would refer me to texts and research materials on this.

I am still open to new ideas and am still researching.

I dont think its impossible but a very good understanding of the interaction of the 2 sheetpile elements below the dredge line and what manner of improvement that may require to be made is what i am working on, proven or empirical.

Once Again.

Thanks