hwstowers@hwstowers.com | +34 943 598 469

HWS | San Sebastian · SPAIN

hwstowers@hwstowers.com | +34 943 598 469

HWS | San Sebastian · SPAIN

A PRECAST FOUNDATION
for Wind Turbines

Simplified to 4 legs. Why more?

HWS CONCRETE TOWERS S.L. (HWS) has Developed and Patented a new PRECAST FOUNDATION for the WIND ENERGY SECTOR, as well as the associated construction methodology.
The AirBASE introduces a new structural scheme that profits from serial manufacturing processes as well as simple transportation and easy on-site assembly.
The AirBase consists of four isolated supports built on-site connected to two precast post-tensioned girders placed in a cross-shape.


With this innovation the foundation can be divided in two parts:

Certified Technology

1

First part: four isolated supports built “on-site”, that could be either shallow (footings) or deep foundations (piles). Their dimensions depend mainly on the soil conditions.

2

Second part: two precast girders, therefore industrialized, forming a cross shape and connected to the isolated supports. Their dimensions depend mainly on the wind turbine loads.

The AirBase resists the high loads introduced by the new generation of +4.X MW wind turbines thanks to its structural scheme: the precast girders work as lever arms. 

These girders could present different cross-shapes:

INDUSTRIALIZATION

This is the best strategy to REDUCE COST and construction TIME, while offering high QUALITY CONTROL.
More than half of the foundation could be pre-cast, and  as a result, industrialized.

COST-EFFECTIVENESS

The estimated savings could reach up to 35%, a percentage that will mainly depend on the  soil properties, turbine size and tower height. The bigger and higher, the better.

APPLICABILITY

The advantages of the AirBASE solution are significant in countries and wind farms with bad weather conditions, when working outdoors is limited to only some months of the year, where the quality or  regularity of the concrete is variable, when reducing construction times is critical, when the depth of the four supports is different, where there is a lack of human resources, and so on.

Optimized Structural Scheme:
Isolated support points and lever arm mechanism.

SCHEME OF POST-TENSIONED PRECAST GIRDERS

ASSEMBLY PROCESS

A new SOLUTION for any type of TOWER and any type of SOIL

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REDUCING COSTS up to 35%

DE-RISKING Projects by reducing on-site works

Precast foundation
for wind turbines

System to construct
wind turbines

Precast/Prestressed concrete
wind turbine tower

Precast foundation
for wind turbines