铁道标准设计2016，Vol.60Issue(10)：4-8,5.DOI:10.13238/j.issn.1004-2954.2016.10.002
列车振动荷载下锚索预应力现场监测及数值分析
Field Monitoring and Numerical Analysis of Anchor Cable Prestress under Train Vibration Load
摘要
Abstract
The vibration may cause the prestress loss of anchor cables in the reinforcement system, which affects the stability of the foundation pit. The actual effect caused by the train vibration load on the prestress of the anchor cables has not been reported. Therefore, the analysis of the influence on prestressed anchor cable caused by train vibration has great theoretical and practical significance. With reference to the practical engineering of the deep foundation pit anchor reinforcement system near the existing Beijing~Guangzhou railway, the prestress loss of anchor cable caused by train vibration load is analyzed by means of field monitoring in the actual engineering environment. Numerical analysis with Flac-3D software is conducted to confirm this conclusion. It is proposed that reducing the train speed below 80 km/h and constructing the main structure of the tunnel as soon as possible can effectively reduce the prestress loss, improve the pit reinforcement effect, and ensure the safety and stability of the foundation pit.关键词
深大基坑/列车荷载/锚索预应力/现场监测/数值分析Key words
Deep foundation/Train vibration load/Anchor prestress/Field monitoring/Numerical anal-ysis分类
交通工程引用本文复制引用
贾晓云,朱永全..列车振动荷载下锚索预应力现场监测及数值分析[J].铁道标准设计,2016,60(10):4-8,5.基金项目
国家自然科学基金(51478277) （51478277）
河北省高等学校科学技术研究青年基金项目(QN2014137) （QN2014137）
