Method for replacing anchor plate bolts of wind driven generator foundation by excavating roadway

The invention discloses a method for replacing anchor plate bolts of a wind driven generator foundation by excavating a roadway. An open-air roadway, a horizontal roadway and an annular roadway are excavated, under the condition that the wind driven generator foundation is not damaged, personnel enter the bottom of the wind driven generator foundation, anchor bolt nuts are maintained and replaced by chiseling the bottoms of the anchor bolts, a clockwise symmetric replacement method is adopted; after replacement is completed, under-tension inspection and over-tension inspection are conducted, finally, grouting rubble is filled in the roadway in a segmented mode for blocking, and finally pumping micro-expansion concrete is used for filling gaps between the grouting rubble and the foundation bottom plate and gaps between the portions, where the concrete is chiseled away, of the bottom plate densely. The method solves the problems that in the prior art, the construction period is long, the wind driven generator f