Protection for Wind Turbine Generator Footings in Madhya Pradesh

Protection for Wind Turbine Generator Footings in Madhya Pradesh

Location Behpur, Mandsaur, Madhya Pradesh
Principal Client Suzlon Energy Ltd., Hadapsar, Pune
Client Name Atriwal Infrastructure Pvt. Ltd., Indore
Design Consultants Technology Department, Suzlon Energy, Pune
Application Erosion protection
System Offered StrataWeb® geocells
Project Completion June 2014

Background

Owing to soil erosion because of wind and rain water run-off, Suzlon was plagued with the exposure of foundations for its twenty wind energy generators (WTGs) at Mandsaur, Madhya Pradesh. The foundations are circular footings at shallow depths.

Objective

Sites for WTGs are particularly selected where the intensity of wind is high over a major period of an average day. However during intense rain or wind soil erosion can be severe and footings founded at shallow depths can get exposed. StrataWeb® geocells laid at the surface with appropriate in-fill protect against such erosion. The honeycomb structure of the geocells provides confinement to the in-fill and prevents it from being dislodged by the agents of erosion. The infill also nurtures vegetation within the cells which not only offers added protection but also lends an aesthetic touch.

For this project, StrataWeb® Geocell SW660 075, i.e. 75mm deep cells with 660mm weld spacing was used. Local soil was used for in-filling.

Solution

The ground surface above the circular footings of each wind turbine was cleared of all rank vegetation and loose material. The soil was compacted to about 16kN/m3 and a general ground slope was maintained at roughly 1V:40H. StrataWeb® panels were cut and placed to cover the circular profiles of the footings. Adjacent panels were connected together with high strength cable ties. The geocells were in-filled with local soil and compacted.

Benefits to Clients

StrataWeb® prevents erosion of the surface soil by confinement. Hence hardly any maintenance or replenishment of soil cover is required. This reduces the life-cycle costs of the system.

Technical Details

Technical Details