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VCE’s Investigation into the Environmental Health of the Lowell Mountains with Industrial Wind Turbines – July 2016
Author: Vermonters for a Clean Environment
WATER 1. The “wet” ponds are predominantly dry or are not holding the volume of water necessary to provide water quality treatment as required by the VT Stormwater Management Manual. Further, it is highly probable that instead of flowing through the outlet structure, stormwater is simply passing through the rock berms bypassing the water quality and peak flow attenuation necessary. This seepage is also highly likely causing the iron seeps to form (see below). Stormwater ponds and level spreaders receive . . .
More »Anchor cage foundations
Author: Miceli, Francesco
Anchor cage foundations are an alternative to the embedded ring and they will be a de facto standard in the future. Basically an anchor cage is a set of bolts, kept together by inferior and superior steel rings. It normally arrives disassembled to the site, and it is mounted by workers in a few hours. The main advantage is a better transmission of loads to the concrete: sometimes a separation of the embedded ring from the concrete is observed, normally . . .
More »Embedded ring foundations
Author: Miceli, Francesco
Embedded ring is one of the 2 solutions currently used in onshore wind farm foundations. Basically [it] is a steel cylinder with several holes: a set of holes all around it to allow radial steel reinforcement bars to cross it and another set of holes for the passage of medium voltage cables and the earth copper wire. This element is lifted with a crane, and it is put on the foundation hole, above the blinding concrete. Then the topographer levels . . .
More »Augercast deep foundation piles
Author: Miceli, Francesco
The following pictures are from a wind farm where due to the weak conditions of the subsoil a deep foundation with piles has been necessary, using a technique known as continuous flight augering (CFA). As you can see, with the same machine we drilled and pumped the concrete in the hole. A dry hole has been made, without the use of bentonite or others drilling fluids to maintain vertical the walls of the hole: the earth is removed using an . . .
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