道岔

Since the general turnout can not do, we must develop a special turnout - bifurcated track heart activity.

既然普通道岔做不到，就必须研制特殊道岔——活动心轨道岔。

The paper introduces the concept of curve following turnout branch line,the confirmation of head and end,the chord offset calculation of points,the measuring steps in the field.

道岔附带曲线是由道岔侧股引出一与导曲线成反向曲线的曲线，它与道岔有着密切的联系。

A common line connecting various types of single-and double-switch turnout; cross-cross and a diamond-shaped cross-straight; cross-connect with the combination of a switch and cross-reference points, such as crossing lines.

常用的线路连接有各种类型的单式道岔和复式道岔；交叉有直交叉和菱形交叉；连接与交叉的组合有交分道岔和交叉渡线等。

Meanwhile, the paper makes feasible demonstration for developing jointless turnout in the future.

通过对兰新线上已铺设提速道岔的实地调查研究，提出了对提速道岔在使用初期运行品质的评价意见及改进和加强的措施，并对发展为无缝道岔的可能性进行了论

The model of jointless turnout on bridge is built up by using the finite element method,the forces and displacement of jointless turnout are computed,and the influences on jointless turnout of bridge structure are analyzed.

本文采用有限元分析的方法，建立桥上无缝道岔的模型，计算桥上无缝道岔的受力和变形，并分析了桥梁结构对无缝道岔的影响。

As a rising subject, the vehicle-turnout system dynamics has been founded initially at the present to study the vibrative characteristics of vehicle subsystem and turnout subsystem while the train passing through the turnout zone.

车辆—道岔系统动力学作为专门研究铁道车辆通过道岔时车辆系统与道岔系统振动特性的新的研究领域，目前在国内外已逐步开展。

Research purposes:The paper gives an introduction to the additional force transfer mechanism of welded turnout on ballastless track,presents the calculation model for welded turnout on ballastless track, calculates additional force and deformation of welded turnout on ballastless track by FEM,the result is compared with ballast track.

研究目的：分析无砟轨道基础上无缝道岔的纵向力传递机理，建立无砟无缝道岔计算模型，采用有限单元法计算了无砟无缝道岔受力及变形，并与有砟轨道无缝道岔进行了对比分析，为无砟无缝道岔设计提供参考依据。

Thus,locks through the rail switch electricity the contact locks for the signal electricity the magnet coil delivers the electric current,only then the switch location correct only then causes the closed circuit,the signal electricity to lock has the enough electric current,after namely the approval moves the signal handle to cause the semaphore opens,by the signal electricity locks the contact for the rail switch electricity to lock the magnet coil power transmission electric circuit to separate,therefore cannot move the rail switch handle again,soon the rail switch locks in the position.

这样，通过道岔电锁器的接点给信号电锁器的电磁线圈送电流，只有道岔位置正确才使电路接通，信号电锁器有足够电流，即准许扳动信号握柄使信号机开放后，由信号电锁器的接点给道岔电锁器电磁线圈送电的电路被断开，于是再不能扳动道岔握柄，即将道岔锁在规定位置上。

Through the reason analysis about one of the representative derailment accident,account for the reason,causing the derailment accident,is result of combine work of the wheel flange,grind and pile,and the wear of switch rail and base rail.

通过对某次典型货车脱轨事故的分析，说明引起车辆过道岔脱轨事故主要是由于车辆轮缘磨耗和碾堆，以及道岔尖轨和基本轮磨损联合作用的结果，因而提出建议要进一步完善车辆检修规章，以及完善和提高道岔处的钢轨磨耗限度标准的必要性和紧迫

Based on the wheel/rail multi-point contact in turnout zone, a dynamic design theory for high-speed railway turnout was established and several creative designs were made, such as separated semi-tangent switch plane linetype, horizontal hidden nose structure of turnout frog, short transitional top surface figure of the switch rail, and track stiffness of turnout with even elasticity.

基于道岔轮轨多点接触关系，建立了高速道岔动力分析理论，并设计出适合我国高速道岔的相离式半切尖轨平面线型、心轨水平藏尖结构、尖轨短过渡顶面轮廓和弹性均匀的岔区轨道刚度。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。