铁道标准设计2017，Vol.61Issue(5)：6-10,5.DOI:10.13238/j.issn.1004-2954.2017.05.002
大风、高温差条件下高铁路基沉降自动观测仪器与评估方案研究
Research on Auto-observation Instrument for Subgrade Settlement Deformation Subject to Strong Wind and High Temperature Difference and Evaluation Method
摘要
Abstract
Analysis of substructure settlement and deformation should be carried out to confirm the compliance of the settlement and deformation after construction with design requirements before ballastless track is laid.The current method of settlement evaluation cannot meet the required frequency, accuracy and effectiveness due to the harsh natural conditions of the second double-track of Lanzhou-Xinjiang railway.To solve this problem, a multi-point static leveling settlement observation instrument is developed and representative construction site is selected to study the method for subgrade settlement deformation assessment.Research results show that (1) the laboratory test results demonstrate less than 1.0mm of absolute error of the instrument and the failure of field test to reach the accuracy of laboratory;(2) the index curve method and Asaoka method are successful to obtain better forecast result for the settlement observation of the second double-track of Lanzhou-Xinjiang railway under special climate condition;(3) Reducing the required curvilinear regression correlation coefficient from 0.92 to 0.85 is more applicable for the subgrade settlement evaluation of the second double-track of Lanzhou-Xinjiang railway.关键词
高速铁路/大风/高温差/路基/沉降变形/观测仪器/评估方案Key words
High speed railway/Strong wind/High temperature difference/Subgrade/Settlement and deformation/Observation instrument/Evaluation method分类
交通工程引用本文复制引用
屈耀辉,庄德华..大风、高温差条件下高铁路基沉降自动观测仪器与评估方案研究[J].铁道标准设计,2017,61(5):6-10,5.基金项目
国家科研院所技术开发研究专项资金项目(2010EG123210) （2010EG123210）
铁道部科技研究开发计划项目(2010G019-S) （2010G019-S）
