提速列车通过时既有线非改建路基的适应性研究  

Study on Adaptability of the Existing Subgrade to Train Speed-increase

作　　者：马伟斌[1] 韩自力[1] 张千里[1] 

机构地区：[1]中国铁道科学研究院,北京100081

出　　处：《铁道工程学报》2008年第3期1-4,共4页Journal of Railway Engineering Society

摘　　要：研究目的:通过连续物探检测及系统的静态原位测试,获得路基土的物理力学性质指标,对测试段路基进行全面质量评价;通过列车动载试验,测试不同状态时路基动力响应,对既有路基适应性进行评价,为既有线提速提供技术支持。研究结论:实车动测表明,120 km/h货车通过时,路基的动应力、动变形与目前运营列车相当;200 km/h动车组通过时,路基的动应力平均约为目前运营列车的1/2,动变形平均约为目前运营列车的1/3。通过试验结果分析,得出了提速路基的主要控制因素,并对提速路基技术条件提出建议;提速路基处理的重点是原有路基存在的问题和薄弱环节。Through continuous geophysical prospecting and in -situ test, physical and mechanical parameters of the subgrade are revealed to make a comprehensive evaluation of the subgrade and through train dynamic test, dynamic responses of the subgrade under different statuses are measured to make evaluation of adaptability of subgrade for the purpose of providing technical support for the train speed - increase on existing railway. Research conclusions：The real train dynamic test indicates that the average dynamic deformation and dynamic stress of the subgrade are close to that of passing current trains when passing freight trains at speed of 120 km/h, and the average dynamic stress of the subgrade is the 1/2 of passing current trains and the average dynamic deformation of the is the 1/3 of passing current trains when passing 200 km/h EMU. subgrade Based on a comprehensive analysis of the test results, this paper points out the main controlled elements of speed - increase subgrade, and presents the technical condition of speed - increase subgrade and the problems and vulnerabilities existed in speed - increase subgrade of existing railway.

关 键 词：既有线 提速改造 非改建路基 原位测试 动态测试 

分 类 号：U213.1[交通运输工程—道路与铁道工程]