南昆线那百段路基基床病害原因分析及整治

分析了南昆线那百段路基基床产生病害的各种原因以及各种因素对路基基床产生病害的潜在威胁；对整治措施进行了简要介绍。     

向西编组场机11线基床病害整治经验浅谈

1 工程概况 向西编组场位于京九线和浙赣线交叉处,是华东地区最大的编组场,日编组量达两万多辆,是京九、浙赣线货运的枢纽站。机11线是1995年建成的,东起2场250道岔,西至7场733道岔,全长707.9m,是7场单机进出库重要路段。该线走行机车十分繁忙。2场、7场为高填方路堤,二者中间为5场编尾驼峰,因为地形限制,该线设计采用以路堑形式,下立交斜交穿过驼峰的方案。这样造成线路两端高,在立交桥处低,而且线路在立交桥两侧呈反向曲线,中间夹直线40m长,最小曲线半径为200m,最大线路坡度为24‰,钢轨为     

固格网在裂土基床病害整治中的应用

本文介绍了两种规格的因网在裂土基床病害整治中的使用情况。叙述了施工过程和下沉情况。肯定了些新材料的整治效果。     

哈南编组站基床病害及整治措施的研讨

本文通过对哈南编组站基床上的冬季现场取样化验及室内模拟试验，阐述了上产生基床病害的根源是基床土冻结过程听水分转移。着重分析了影响水分迁移量的土、水、温度及荷载等几大要素特征，并提出防治病害的基本原则及工程措施。     

应用土工格室整治铁路基床病害

介绍利用土工格室整治浙赣线基床下沉病害的实例，并分析了采用该方法整治路基病害所需的最小换填深度。     

喷入生石灰粉法整治基床病害的研究

本文介绍了用生石灰粉喷斜桩整治基床病害的机械设备、施工工艺及整治效果。为整治基床病害开辟了一条新路，也可用软土基底处理及边坡加固。     

贵阳铁路分局管内基床病害整治浅析

对贵阳铁路分局管内基床病害的成因进行了分析和论述，对已采取的基床病害的整治措施进行了较详细分析和评价，对今后基床病害的防治对策提出了有关建设。     

朔黄铁路路基病害地质雷达探测技术研究

以朔黄铁路工程探测实例,介绍了地质雷达探测路基病害的探测方案和方法;结合实测资料,分析了道碴厚度、道碴陷槽、翻浆冒泥、下沉外挤和桥头下沉等病害的雷达信号特征.采用底面加长PVC板的屏蔽天线直接探测,不仅排除了钢轨、枕木等干扰,而且能满足铁路快速、无损检测和不影响正常行车的要求.     

青藏铁路燕石坪石膏岩溶地基处理实录

介绍青藏铁路燕石坪石膏岩溶地基处理工程分层注浆法在多层溶洞中的应用,尝试使用了潜孔锤结合地质钻机的成孔工艺,同时在施工中灵活运用分序次检查逐渐加密的方法,以确保岩溶注浆的处理效果。     

京广铁路提速地段道岔基床病害的换填整治

京广铁路部分提速地段的道床为Ⅱ级石灰岩道碴,基床病害十分突出,危及行车安全。在既有行车条件下,通过换填整治,以较小的投入取得较好的效果,具有借鉴价值。     

内六铁路K494石质堑坡变形成因及治理

文中对石质堑坡变形的地质情况、变形特征、稳定性进行了分析，采取在路基右侧挡墙顶部进行预应力锚索地粱加固，在路基左侧坡面进行三级预应力锚索加固。施工后，监测结果，坡体稳定，线路未再发生变化，表明对石质滑坡的治理收到良好效果，     

Perspectives on railway track geometry condition monitoring from in-service railway vehicles

This paper presents a view of the current state of monitoring track geometry condition from in-service vehicles. It considers technology used to provide condition monitoring; some issues of processing and the determination of location; how things have evolved over the past decade; and what is being, or could/should be done in future research. Monitoring railway track geometry from an in-service vehicle is an attractive proposition that has become a reality in the past decade. However, this is only the beginning. Seeing the same track over and over again provides an opportunity for observing track geometry degradation that can potentially be used to inform maintenance decisions. Furthermore, it is possible to extend the use of track condition information to identify if maintenance is effective, and to monitor the degradation of individual faults such as dipped joints. There are full unattended track geometry measurement systems running on in-service vehicles in the UK and elsewhere around the world, feeding their geometry measurements into large databases. These data can be retrieved, but little is currently done with the data other than the generation of reports of track geometry that exceeds predefined thresholds. There are examples of simpler systems that measure some track geometry parameters more or less directly and accurately, but forego parameters such as gauge. Additionally, there are experimental systems that use mathematics and models to infer track geometry using data from sensors placed on an in-service vehicle. Finally, there are systems that do not claim to measure track geometry, but monitor some other quantity such as ride quality or bogie acceleration to infer poor track geometry without explicitly measuring it.     

铁路路基道碴囊及路基空洞注浆加固治理

对既有铁路软弱桥头、路基碴囊及路基空洞采用注浆加固,可使路基承载力显著提高,且施工不要点、不封闭、不缓行,提高了铁路的综合效益。注浆加固是整治类似病害而不影响运营的一种较好方法。     

黄石铁路K25软土路堤坍滑原因与治理

对黄石铁路K25软土路堤坍滑原因进行了分析,探讨坍滑变形特征,并提出了处理措施.     

铁路钻探卡钻事故分析

卡钻是钻探中的一种事故,常易造成较大损失.文章从岩层、钻井液、钻探设备、施工因素方面分析了卡钻原因,提出了预防措施,并结合向莆铁路钻探中的卡钻事故进行了分析,总结了一些有意义的结论.     

Study on the derailment behaviour of a railway wheelset with solid axles in a railway turnout

ABSTRACT

Dynamic wheel–rail interaction in railway turnouts is more complicated than on ordinary track. In order to evaluate the derailment behaviour of railway wheelsets in railway turnouts, this paper presents a study of dynamic wheel–rail interaction during a wheel flange climbs on the turnout rails, by applying the elasticity positioning wheelset model. A numerical model is established based on a coupled finite element method and multi-body dynamics, and applied to study the derailment behaviour of a railway wheelset in both the facing and trailing directions in a railway turnout, as well as dynamic wheel–turnout rail interaction during the wheel flange climbing on the turnout rails. The influence of the wheel–rail attack angle and the friction coefficient on the dynamic derailment behaviour is investigated through the proposed model. The results show that the derailment safety for a wheelset passing the railway turnout in facing direction is significantly lower than that for the trailing direction and the ordinary track. The possibility of derailment for the wheelset passing the railway turnout in facing and trailing directions at positive wheel–rail attack angles will increase with an increase in the attack angles, and the possibility of derailment can be reduced by decreasing the friction coefficient.     

宝成二线路基基庆与道床密实度试验研究

在宝成新建二线一次性铺设区间“冻结”准无缝线路地段，采用核子密度仪对施工前后的路基基床和道床密实度进行了测试，并与既有线进行对比，判定基床和道床满足有关技术要求。