|
|
|
| Spatial Analysis and Study of Roadbed Vibration Effect on Loess Area for Xi′an-Baoji High-speed Railway |
| MENG Xiang-lian, ZHOU Fu-jun |
| (China Railway First Survey and Design Institute Group Ltd，Xi′an, Shaanxi 710043，China) |
|
|
|
|
Abstract Abstract：Research purposes： With the construction and development of China′s western region, the Belt and Road initiatives, high-speed railway net and other major projects, there are a large number of rail transit project on western loess area. The typical roadbed has been selected, and field tests have been carried out, in order to study the environmental effects of ground near the railway, when the train passes. In this paper, the strength, time and frequency spectrum and other spatial features of vibration have been analyzed to provide support for design and measures of similar engineering on loess area. Research conclusions： （1）The vibration load produced by high speed train running, caused the spatial effect on ground surface and underground depth for strata. （2）The strength of vibration caused by train running decreased with the increase of distance and depth. The reduced acceleration changes at certain location. The strength is directly proportional with the train speed and weight along both horizontal and vertical directions, the mathematical relationship is the similar between vibration time and train length. But the distribution of vibration frequency is inversely proportional with train speed along ground surface, and the vibration frequency is concentrated along depth. （3）The vibration produces a rebound and increases in the local position, due to the structural and nonuniformity of loess strata. （4）The research results can provide technical support for high-speed railway subgrade engineering design, and provide theoretical reference for similar geotechnical engineering.
|
|
Received: 04 July 2017
|
|
|
|
|
|
|
2017, Vol. 34 
