Finite Element Analysis of Mechanical Properties of a New Type of Inverted Beam Plate Fan Foundation on Soft Rock Foundation
In order to solve the problems of large excavation volume,cumbersome formwork support,high construction cost,and long cycle caused by using beam slab fan foundation in soft rock foundation.Research on a new type of ribbed fan foundation.Method:Taking a 2.5 MW wind turbine as an example,ABAQUS finite element analysis software was used to establish foundation models of the same size of inverted rib and beam plate wind turbines.The inclination rate,horizontal displacement,and failure characteristics of the two foundations under extreme working conditions were compared,and the economic efficiency of the two was analyzed by combining excavation and formwork quantities.The horizontal displacement of the inverted rib foundation is 0.444 mm,and the inclination rate is 0.012 1%,both of which meet the requirements of the specifications;The force characteristics of the rib beam of the inverted rib foundation are similar to that of the cantilever beam.Under the action of the base reaction,the shear force and bending moment borne by the rib beam at the connection between the pier and abutment are relatively large,which is prone to cracking and damage.This can be improved by increasing the height of the rib beam section;Compared to beam and slab foundations,ribbed foundations can save 54%in earthwork excavation and 48%in formwork engineering.Conclusion:Inverted ribbed foundation fully utilizes the advantages of tooth slot embedding between inverted ribbed beams and soft rock foundation.Compared with beam slab foundation,it not only has better anti slip stability and stress performance,but also reduces excavation and formwork engineering,and has significant economic benefits.
soft rock foundationbeam plate fan foundationinverted beam plate fan foundationfinite element analysisinclination rate
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