For reducing the disadvantageous influence of the the relaxation of strain and the lose of pretension on the structure , the time span of delaying scene torsional moment checx and accurate maintence method are given 为减少高强螺栓预拉应变松弛和预拉应力损失对结构的不利影响，给出了延迟现场扭矩检测的时间区间和正确维护的方法。
