Large Tolerance Seals

[Ussuri]

I have an application where I need to seal between a steel superstructure and a concrete base. The seal would be required to retain 8 bar water pressure.

Here is the problem. The width of the gap that needs sealed ranges from 25mm to 150mm (1" to 6") due to a large variation in level across the concrete. Grouts, epoxy resin etc are not feasible due to other constraints (the application is subsea).

Any suggestions?

 

[graybeach]

Would grout filled flat jacks work?

 

[Ussuri]

Please elaborate, I have not come across the term 'Flat Jacks' before?

 

[graybeach]

Flat jacks are flat round bags that can be inserted into a narrow space and then pumped up with hydraulic fluid for temporary or grout for permanent installation. Here is a link that illustrates them:

http://www.wbequipment.com/flatjacks.htm