[1]孔文亚,黎 康,谢 恺.西南山区高速铁路车站桩板结构高填路基动力特性分析[J].高速铁路技术,2022,13(06):6-11.[doi:10.12098/j.issn.1674-8247.2022.06.002 ]
 KONG Wenya,LI Kang,XIE Kai.Analysis of Dynamic Characteristics of High-fill Subgrade with Pile-slab Structure in High-speed Railway Stations in Southwest Mountainous Area[J].HIGH SPEED RAILWAY TECHNOLOGY,2022,13(06):6-11.[doi:10.12098/j.issn.1674-8247.2022.06.002 ]
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西南山区高速铁路车站桩板结构高填路基动力特性分析()
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《高速铁路技术》[ISSN:1674-8247/CN:51-1730/U]

卷:
13卷
期数:
2022年06期
页码:
6-11
栏目:
理论探索
出版日期:
2022-12-20

文章信息/Info

Title:
Analysis of Dynamic Characteristics of High-fill Subgrade with Pile-slab Structure in High-speed Railway Stations in Southwest Mountainous Area
文章编号:
1674—8247 (2022) 06—0006—06
作者:
孔文亚1黎 康1谢 恺2
1.京昆高速铁路西昆有限公司, 重庆 400023;2.中铁二院工程集团有限责任公司,成都 610031
Author(s):
KONG Wenya1LI Kang1XIE Kai2
1.Beijing-Kunming High-speed Railway Xikun Co. ,Ltd ,Chongqing? 400023 ,China;2.China Railway Eryuan Engineering Group Co. ,Ltd. ,Chengdu? 610031 ,China
关键词:
铁路路基 动力特性 数值计算 站场路基 桩板结构
Keywords:
railway subgradedynamic characteristicsnumerical calculationstation and yard subgradepile-slab structure
分类号:
U213.1
DOI:
10.12098/j.issn.1674-8247.2022.06.002
文献标志码:
A
摘要:
依托渝昆高速铁路云贵段彝良北站“V”型沟谷地区桩板结构高填路基车站建设工程,建立了车辆-轨道-桩板结构路基三维有限元数值模型,分析了在列车上行、下行和会车3种工况下,桩板结构高填站场路基的动应力、动位移及竖向加速度的分布特征,结果表明:(1)列车动荷载主要由桩板结构向下传递至基岩,回填土及原地表土所受荷载较小;(2)地基竖向位移主要发生在回填土浅层土体与原地表土范围内,基床表层位移较小,基岩基本不产生位移;(3)路基竖向加速度随深度增加而递减,且在基床表层区域衰减最快;会车工况下,站坪竖向加速度振级大于单线荷载下所产生的站坪加速度振级。
Abstract:
In this paper,based on the station construction of the high-filled subgrade with pile-sheet structure in the V-shaped valley of Yiliang North Station in the Yungui Section of the Chongqing-Kunming High-speed Railway,a three-dimensional finite element numerical model of vehicle-track-pile-slab structure subgrade is established,and the distribution characteristics of dynamic stress,dynamic displacement and vertical acceleration of high-filled subgrade with the pile-slab structure are analyzed under three working conditions of the train going up,down,and crossing. The results show that:(1)The dynamic load of the train is mainly transmitted through the pile-slab structure down to the bedrock,and the load on the backfill and the original surface soil is relatively small.(2)The vertical displacement of the foundation mainly occurs within the range of the shallow soil mass of the backfill soil and the original surface soil. The displacement of the surface layer of the subgrade bed is small,and the bedrock basically does not displace.(3)The vertical acceleration of the subgrade decreases with the increase of depth and attenuates fastest in the top layer of the subgrade bed. Under the crossing condition,the vertical acceleration vibration level of the station site is greater than the acceleration vibration level of the station site generated under the single-track load.

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备注/Memo

备注/Memo:
收稿日期:2022-11-01
作者简介:孔文亚(1968-),男,教授级高级工程师。
更新日期/Last Update: 2022-12-20