Driven by the“dual carbon”goals

the construction scale of complex mountainous wind farms continues to expand.Due to the characteristics of steep terrain

complex geology

and ecological sensitivity

the road engineering in such areas faces the core problems of a large amount of earthwork and high difficulty in control.This paper systematically analyzes the influence mechanism of the subgrade section type

road parameters

and equipment transportation requirements of the roads in complex mountainous wind farms on the earthwork quantity.Through theoretical derivation

a model for the excavation area of the cross-section of the fully excavated subgrade is established.Combined with engineering cases

the coupling effect of the turning radius and curve widening is quantitatively analyzed

and an estimation method for the earthwork quantity applicable to complex terrains is proposed.The research results provide theoretical support and an engineering application paradigm for the road design of complex mountainous wind farms.