摘要
京通铁路地处东北严寒地区,冻害严重。为了深入了解路基冻胀发生及发展规律,选定京通线冻害较严重的一段对其路基土体含水率和线路冻胀情况进行监测。通过大量数据分析发现,京通线冻害处多与路基病害处相对应。多年运营产生的路基病害使路基面不平整,排水坡被破坏,导致降水无法外排而渗入路基内,破坏了路基体填料的均质性。加之施工填筑阶段,填土来源的差异造成其在冻结期水分迁移和聚积时的聚流量不同,因此,产生了不均匀冻胀。这些数据为日后解决与防治严寒地区路基冻害提供了数据依据。
The Beijing-Tongliao railway is located in the cold region of northeast China. In order to further understand the occurrence and development law of subgrade frost heave, we selected a severe case of freezing injury in Beijing-Tongliao railwany to monitor the water content of the subgrade soil and frost heave condition. Through the analysis of large amount of data, it is found that the location of the freezing injury in Beijing-Tongliao line correspondsto the disease ofthe roadbed. The roadbed damage caused byyearsofoperation hascaused the uneven surface of the roadbed, and the drainage slope is destroyed, so that rainwater can not discharge normally and infiltrate into the subgrade, which destroys the homogeneity of the material of the road matrix filling material. In addition, during the construction filling stage, the difference of the filling source caused the difference in the water transfer during the freezing period and the aggregate flow in the accumulation, resulting in uneven frost heeling. These data provide data basisfor the future solution and prevention offrost damage in the cold region.
作者
汤晓光
TANG Xiao guang(China Railway Shenyang Bureau Group Co.Ltd.,Shenyang 110013,China)
出处
《工程建设与设计》
2018年第20期61-63,共3页
Construction & Design for Engineering
关键词
京通铁路
冻害监测
冻害原因
Beijing-Tongliao railway
monitoring of freezing injury
mason of freezing injury
