风机基础局部加固设计与计算

Design and Calculation of Local Reinforcement of Fan Foundation

鉴于目前风机基础中存在的混凝土风致疲劳破坏,本文提出一种局部栓钉加固方案,即通过对原破损混凝土及穿筒钢筋进行置换后,在穿筒钢筋上下一定范围内,在基础环内外均布置一定数量的栓钉以加强混凝土与基础环间的连接强度.对标准加固单元的极限荷载工况、正常运行工况和疲劳强度进行承载力以及疲劳强度验算.该加固方案目前已应用于实际工程中,并取得了良好的效果,可供实际工程参考.

In view of wind-induced fatigue leading to concrete damage in wind turbine foundation at present,a scheme was presented for the portion reinforcement of studs,in which the original damaged concrete and transverse reinforcement were replaced,in the upper and lower range of transverse reinforcement,connection strength between concrete and base-ring was strengthened by arranging a certain amount of studs at internal and external base-ring.Bearing capacity and fatigue strength checking computations were done by taking the extreme load conditions capacity,the normal operating load conditions capacity and the fatigue strength.This reinforcement scheme has been applied to practical engineering program and it has achieved good results and can be a practical engineering reference.