以山西天脊集团总厂预应力钢栈桥检修为例,提出了三套检修方案,并进行了方案论证,重点介绍了预应力钢绞线张拉在栈桥检修中的应用,通过合理施工,在有限的检修时间（10 d）内,安全高效的完成检修任务,确保了生产正常进行。%Taking the prestressed steel trestle bridge overhaul of the main plant of Shanxi Tianji Group as an example,this paper puts forward and discusses three sets of overhaul schemes,mainly introduces the application of prestressed steel strand in steel trestle bridge overhaul of coal preparing system.Through rational construction,it effectively and safely accomplishes overhaul task within finite time（10 days）,and ensures the normal production.
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