Patrick Henderson foundation

Patrick Henderson foundation is a technology widely used in the States, with thousands of installed foundations, but far less common in Europe.

It’s a patented solution that consists of a large diameter, cast-in-place annular pier, with an average diameter of 4.5 m and a depth of about 9m, depending on the soil conditions and the loads.

Two concentric corrugated metal pipes (CMP) form the interior and the exterior of the concrete hollow annular pier: between the 2 corrugated pipe, an anchor cage is positioned and the bolts are post tensioned to ensure that the concrete of the pier remains always compressed.

The hollow interior of the pier is filled first with 1 m of concrete, than with uncompacted soil and finally with a 35cm thick structural slab.

Basically the P&H foundation works a lot like a beach umbrella.

Among the advantages, a smaller footprint and less material consumption: as an order of magnitude we are talking of approximately 160m3 of concrete and 20Tn of steel.


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About Francesco Miceli

Hello! My name is Francesco and I'm a civil engineer specialized in EPC (that is, "turnkey") wind farms projects. I'm currently based in Hamburg, Germany and I'm developing several interesting project all around the world - southern Europe, LATAM and various other countries. If you want to contact me please don't leave a comment in the blog (I don't check them very often) - you can use the contact form. You can write me in English, Spanish and Italian. To find a (somewhat concise) description of my non-wind business activities you can visit my webpage - If you want to know more about my work, here you can download my CV - Hope you like the blog! Francesco

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