研究目的：在此之前，国内曾经对铺设Ⅱ型枕的有砟道床阻力进行过测试，并提出过道床阻力参数。但随着我国高速铁路的大规模建设和既有线的不断提速，有砟轨道普遍使用Ⅲ型混凝土轨枕，同时道床断面尺寸、道砟材质及颗粒级配不断强化提高，确定Ⅲ型混凝土轨枕有砟道床线路阻力是进行有砟轨道无缝线路设计的一项重要基础工作。
研究结论：本文选取武汉至襄樊区间增建第二线云梦段作为测试工点，通过现场原位测试和对测试数据进行数理统计分析，拟合确定了Ⅲ型混凝土轨枕有砟道床纵向、横向阻力曲线，同时计算了Ⅲ型混凝土轨枕有砟道床的等效横向阻力，其结果可为铁路无缝线路设计阻力的取值提供参考。
Research purposes: The test was done to the resistance of the ballast bed for the II—type sleeper and the resistant parameters were offered in the past．But with large—scale construction of high—speed railway and continuous speed—raise of the existing lines in China，the III—type concrete sleeper has been widely used in ballast track．Meantime，the cross—section size of ballast bed，ballast material and grain gradation have been continually strengthened and improved．To determine the track resistance of the ballast bed forⅢ一type concrete sleeper is an importantly basic work to design the ballast jointless track．
Research conclusions: Through doing the in—situ tests and making statistic analysis of the tested data for Yunmeng experimental section of the additional second track of Wuhan—Xiangfan Railway，the fitting curves of the ballast longitudinal and lateral resistance of the ballast bed for the III—type concrete sleeper were determined．Besides，the equivalent lateral resisitanee of ballast bed for the III—type concrete sleeper Was calculated．The results could be as the referances to design of the resistance of the jointless track．
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