某深基坑施工对临近高速铁路路基影响的研究-《高速铁路技术》

文章信息/Info

Title:: Study on the Influence of Deep Foundation Pit Construction on Nearby High-speed Railway Subgrade

Author(s):: GAO Xianping; China Railway Design Corporation, Tianjin 300142, China

Keywords:: deep foundation pit|high-speed railway|subgrade|finite element model|safety assessment|operating safety

摘要:: 文章针对临近既有铁路的深基坑工程逐渐增多的现状，以北京某深基坑工程为背景，利用三维有限元软件模拟深基坑施工对临近既有高速铁路路基的影响，计算出各施工步骤下的高速铁路路基变形数值，并找出了变形的变化规律。通过分析结果可知路基的变形满足高速铁路的相关要求。研究得出有限元数值模拟的安全评估方法是有效的，其结果可以指导施工，并通过对高速铁路路基进行监控，保证了铁路的运营安全。研究结果对类似的工程施工具有重大的借鉴和指导意义。

Abstract:: Now there are more and more deep foundation pit projects near the existing high-speed railwaying. This paper takes a deep foundation pit project in Beijing as an example to simulate the influence of deep foundation pit construction on adjacent existing high-speed railway subgrade by using 3D-finite element software. The deformation values of high-speed railway subgrade under each construction step are calculated and the deformation regularity is summarized. The results show that the deformation of the subgrade can meet the requirements of the code for design of high-speed railway. The method of safety assessment based on finite element numerical simulation is valid,the results of safety assessment can guide the construction, and ensure the safety of the railway operation through the monitoring of high-speed railway subgrade. The results of this paper have a great reference and guidance for similar engineering construction.