Field test of piled beam-slab foundation

The project of wind power generation is an important step of the sustainable development path of China or even the world. Piled beam-slab foundation of wind generating set is a new form of the foundation for wind turbine on land, the research on which is attracting broad attention in academic and engineering fields. Through installing earth pressure cells under the baseboard and reinforcement meters in the piles, the test, based on the wind turbine project at Sheyang port in Jiangsu province, measures the soil pressure under the foundation and the axial force at the top of piles when the wind turbine is under construction and working normally. The research mainly focuses on the change rules of the axial force at the top of piles of the wind turbine piled beam- slab foundation under construction condition and working condition and the analysis of the load sharing percent of piles and soil. The contrastive analysis of the internal forces between the field test and actual design calculation is also carried out. The results show that the piles bear most of the load before the wind turbine running; piles inside bear less load and piles outside bear more after the wind turbine running. The soil bears large percentage of load when the wind turbine is working; so the current design method which doesn't consider the bearing capacity of soil makes the result safer.