With the continuous growth of the axle load and number of axles of trains and the extension of service life,the monolithic track bed of ordinary speed railway tunnels built in the 1970s successively suffered from cracking,uneven settlement and other diseases.Based on the mechanism of the disease and taking into account both driving and construction,optimize the treatment methods of existing diseases,this study proposes the method of using fast early strength materials to lift the track bed,repair cracks and simultaneously replace the bearing pad stone.The results show that the construction method is feasible for the treatment of uneven settlement and cracking of the existing ordinary speed railway monolithic track bed;The static inspection results of the field track gauge,level and height after grouting meet the operation acceptance standards;The dynamic inspection results of the track inspection car show that the standard deviations of gauge,horizontal,left high low,right high low,vertical acceleration and other items after the renovation are 59.85％,16.07％,68.69％,72.53％and 29.51％lower than those before the renovation;This study will provide an empirical basis for the treatment of monolithic track bed diseases of similar ordinary speed railway tunnels.
关键词
铁道工程/整体道床/病害整治/道床开裂/不均匀沉降
Key words
railway engineering/monolithic track-bed/disease treatment/cracking of track bed/differential settlement
维普
万方数据