地质力学学报2018，Vol.24Issue(3)：407-415,9.DOI:10.12090/j.issn.1006-6616.2018.24.03.042
考虑断层效应的高铁列车动荷载对地面沉降影响机理研究——以京张高铁怀来段为例
REAEARCH ON THE MECHANISM OF THE INFLUENCE OF DYNAMIC LOAD OF HIGH-SPEED TRAIN ON LAND SUBSIDENCE SUBJECTED TO FAULT EFFECT: A CASE STUDY OF THE HUAILAI SECTION OF THE BEIJING-ZHANGJIAKOU HIGH-SPEED RAILWAY
摘要
Abstract
The Huailai section of Beijing-Zhangjiakou ( BZ ) high-speed railway is located in the compound position of the Huaizhuo basin and Yanfan basin.The ground subsidence resulted from the difference of engineering geological characteristics of soil and sliding of buried faults in the basin will undoubtedly threaten the safe operation of BZ high-speed railway.Using numerical simulation to study the mechanism of the influence of dynamic load of high-speed train on land subsidence subjected to fault effect, the 2D geological model of soils in the Huailai section of BZ high-speed railway is established based on the field data of engineering geological boreholes and geophysical exploration in this study.The results indicate that the dynamic load of the train mainly affects the soil within the depth of 50m, with increasing displacements accompanying decreasing train velocities and increasing train mass.Under both the dynamic train load and fault slip, the settlement of the soil mainly affected by the dynamic train load tends to be mainly controlled by the fault slip as the depth increases.And the settlement of the soil below 50m is controlled by the fault slip.What's more, the settlement of soil around the fault in the hanging wall is larger than that in the footwall at the same distance from the fault.关键词
活动断层/高铁列车动荷载/数值模拟/动力响应/沉降Key words
active fault/dynamic load of high-speed train/numerical simulation/dynamic response/land subsidence分类
天文与地球科学引用本文复制引用
王苗苗,丰成君,戚帮申,孟静,张鹏,任思起,谭成轩..考虑断层效应的高铁列车动荷载对地面沉降影响机理研究——以京张高铁怀来段为例[J].地质力学学报,2018,24(3):407-415,9.基金项目
中国地质调查局项目(DD20160267) （DD20160267）
中国地质科学院地质力学研究所院所长基金(DZLXJK201711) （DZLXJK201711）
