Study on Settlement of Railway Embankment on Deep Completely Decomposed Granite Ground with Centrifugal

[交通会议论文数据库] Hongbing XIAO Guanlu JIANG Jingzhi WANG Anhong LI

摘要:The settlement control of high-speed railway is a key technology of the embankment engineering.In allusion

The Application of On-line Rail Milling in Rail Maintenance of High-speed Railway

[交通会议论文数据库] Yu ZHOU Yude XU Haifeng LI Liang CAO

摘要:Base on the data of field measurement of on-line rail milling,a program for comparing rail transverse

Analysis on Vehicle Movement Dynamics Performances of High-speed Railway Transition Curves

[交通会议论文数据库] Xiangguo LI Musong LI Chao MA Liangliang ZHU

摘要:High-speed railway transition curves have again become an important subject of traffic engineering because

Situ Tests on Fatigue Characteristics of Top-mounted Dividable Pile-board Structure Subgrade in High-speed

[交通会议论文数据库] Qian SU Hao AI Xun WANG Haoran JIANG

摘要:The top-mounted dividable pile-board structure subgrade is a new type of high speed railway line structure

Centrifuge Model Tests on Setllment Controlling of Piled Raft Composite Foundation in High Speed Railway

[交通会议论文数据库] Changdan WANG Xu WANG Shunhua ZHOU inglong WANG

摘要:The settlement after construction controlling of subgrade is a crucial issue on designing of high speed

Dynamic Behaviour of Double-row Prestressed Anchor Piles under Earthquake

[交通会议论文数据库] Changqing LIU Yunhui TAO Xiang LI

摘要:In this paper,the double-row prestressed anchor piles on a site are used as the project background,FLAC3D procedures is used to establish the three-dimensional model of the pile wall.Based on the seismic wave inputted to the bed rock,the dynamic time-procedure analysis of the pile and landslide mass is done,the earth pressure on the front and back of the pile and deformation of pile body under different seismic force,and on different piles with or without anchor rope are contrasted and analyzed as a key point.

重力式支挡结构动土压力试验分析

[交通会议论文数据库] 刘昌清 李世元 刘少飞

摘要:本文通过对重力式支挡结构(包括重力式路肩墙、重力式路堤墙和衡重式挡墙)的实尺动态试验模型,测试分析了各种墙型在不同的动荷载幅值、不同的加载距离情况下挡土墙墙背动土压力的大小和分布情况,并与现有的理论计算值进行了对比分析

路堤荷载作用下高强度桩复合地基土中应力计算方法探讨

[交通会议论文数据库] 张敏静 罗强 张良

摘要:为更加准确计算高强度桩复合地基土中应力,采用Mindlin和Boussinesq联合求解的方法(M&B法),编制计算机程序并结合工程实例,得出桩体承担的三种形式的荷载引起的土中应力在垂直截面和水平截面内的分布,并进一步计算出复合地基土中应力沿深度的分布,与实测值较为符合,证明该方法合理；将路堤中心附近桩间土轴线和桩轴线处土中应力按置换率复合,得到加固单元的平均应力并与Boussinesq解得到的平均应力进行比较,得出在摩擦桩情况下不一定出现复合地基中的高应力下移的现象；经过多次试算,取计算半径与路堤底面宽度相同.

高速铁路路基动力特性研究综述与展望

[交通会议论文数据库] Xianghui KONG 孔祥辉 Guanlu JIANG 蒋关鲁 ong LIANG 梁栋 Zuyin ZOU 邹祖银

摘要:　　本文在总结高速铁路路基土体的动力特性、动载下路基土的沉降变形、路基动力响应、路基土体的动本构模型等已有的研究基础上，指出了路基动力学研究中存在的路基系统过于简化即现场试验造价等不足之处，并对此进行了展望。

基于不规则多边形块体道砟离散单元法仿真

[交通会议论文数据库] Guoqing JING 井国庆 Lei SHAO 邵磊 Chenghui LI 李成辉

摘要:　　道砟道床养护工作耗费巨大并占用线路，为从细观力学上反映道砟与轨枕相互作用，基于离散单元法，采用满足一定级配不规则多边形块体代表道砟颗粒，建立道砟-轨枕离散模型，单调与循环荷载下研究道砟作用力、位移、轨枕沉降。结果表明：道砟颗粒几何尺寸、位置散体特性分布导致道砟之间作用力在方向与数值上呈离散分布，最大作用力集中于轨枕底部，随着道砟接触摩擦角、侧向约束降低轨枕沉降增大。因此，选取合适的多边形块体道砟可以加强道床的稳定性。