路基工程Issue(4)：124-129,6.DOI:10.13379/j.issn.1003-8825.202307023
考虑地基模量选取弹性模量修正参数的高速铁路复合地基路基沉降预测
Settlement Prediction of High-speed Railway Composite Subgrade via Selection of Elastic Modulus Correction Parameter by Considering Foundation Modulus
摘要
Abstract
Accurate prediction of subgrade settlement is important to safe operation of high-speed railway.Herein a method predicting the composite subgrade settlement,which selects the elastic modulus correction parameter by taking foundation modulus into consideration,was proposed.The numerical simulation with Midas GTS-NX finite element software was applied to predict the subgrade settlement of Nanchang-Jingdezhen-Huangshan High-speed Railway.In contrast to the field monitoring,the prediction error was controlled within 10％,showing certain reliability of this method.Furthermore,the method was used to predict composite subgrade settlement of existing multiple parallel Shijiazhuang-Jinan Passenger Dedicated Lines.The result shows that the maximum displacement of subsidence is up to 32 mm,respectively appearing at the shoulder of up and down line,and the overall trend of deformation increases gradually from right to left;the maximum subsidence at the center of left line,the center of subgrade surface and the center of right line is 21,17,16 mm respectively.The predicted value of settlement accords to the specification.关键词
高速铁路/复合地基路基/沉降预测/数值模拟/弹性模量修正参数/现场监测Key words
high-speed railway/composite subgrade/settlement prediction/numerical simulation/elastic modulus correction parameter/field monitoring分类
交通工程引用本文复制引用
李鑫..考虑地基模量选取弹性模量修正参数的高速铁路复合地基路基沉降预测[J].路基工程,2024,(4):124-129,6.基金项目
中国铁路设计集团有限公司科技开发课题B类课题:土建结构沉降计算方法、软件编制及应对措施(2021B240606) （2021B240606）
