Vibration-absorbing fastenings for underground
Protection of close buildings and constructions from low frequency vibrations propagated in soils and transferred through buildings basements on their bearing structures, causing vibration and secondary structure noise is a very topical problem both for underground lines which are being built and which are being used for a long time. Based on the analysis of existing vibration- absorbing constructions it is offered a new approach grounded on constraint of rail move to one, where total hardness is regulated. The suggested constructions of a track with fastenings of vibration-absorbing fastenings type completely meet all the requirements of undergrounds, provide reduction of dynamic infl uences on under-rail base, exclude breakaway of rail support from concrete base, give the possibility of easy service and resilient members replacement, exclude construction elements wear due to the lack of friction pairs. The comparison of theoretical and actual infl uence lines of vertical rail move with vibration- absorbing fastenings.