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镇江市地处长江沿江丘陵地带,地质结构较为复杂,且浅层有较厚的人工填土及粉质黏土,对路基施工及后期的稳定较为不利。由于路基在运营期处于隐蔽状态,难以详细地了解其内部状态,一旦出现沉降需要加固,处理非常麻烦且费用较高,如何较准确地分析得到总沉降量是需要研究且比较有意义的一个问题。本文以京沪高速铁路镇江段路基沉降观测数据为例,分析高速铁路路基施工中沉降量的数种计算方法及控制,并分析适用条件及优越性,以期对类似工程的施工控制有些许帮助。
Zhenjiang City is located in the hilly area along the Yangtze River. Its geological structure is rather complicated, with thick artificial fill and silty clay in the shallow layer, which is unfavorable to the subgrade construction and the later stability. As the subgrade is in a hidden state during operation, it is difficult to know its internal state in detail. Once the subsidence needs to be reinforced, the treatment is very troublesome and the cost is relatively high, how to analyze the total subsidence accurately is a problem that needs to be studied and meaningful . Taking the settlement data of subgrade in Zhenjiang section of Beijing-Shanghai high-speed railway as an example, this paper analyzes several calculation methods and control of subsidence in high-speed railway subgrade construction and analyzes the applicable conditions and advantages so as to provide some help for the construction control of similar projects.