Research on Operational Effect of High Speed Railway Ballasted Track Tamping Mode Based on BDS Method
In order to study the effect of digital tamping operation on high speed railway,a large-scale tamping mechanical tamping test was conducted on site.The ballast bed support state detection method based on the ballast dynamic stiffness(referred to as BDS method)was used to test the ballast bed support stiffness.Combined with track inspection data,the influence of four main tamping modes on the ballast bed support state and track geometry state of high speed railways in China was comprehensively analyzed.The results indicate that the use of ballast bed support stiffness and track quality index can evaluate the effectiveness of large machine tamping operations from different perspectives.When the initial state of the ballast bed is good,the digital tamping of high speed railway ballasted tracks adopts two modes of operation,which are single tamping+single tamping stability,and single tamping+stability+single tamping.The comprehensive improvement effect of the ballast bed support state and the track geometry state is good.The single tamping+stable mode can effectively improve the uniformity of the support of the ballast bed under the sleeper,but it may lead to a deterioration of the average support stiffness of the ballast bed and the quality index of some 200 m unit sections after tamping operation.In the case of small starting volume,the single pass double tamping+stability mode may exacerbate the non-uniformity of the ballast bed support after operation.
high speed railwayballasted trackfield testtamping modeballast bed conditionBDS method
万方数据
维普
