Construction Management Innovation and Practice in Qinghai-Tibet Railway Project

The construction of the Qinghai-Tibet Railway is one of the significant decisions made by the CPC Central Committee and the State Council at the beginning of the new millennium, it is also the landmark project of the China＇ s Western Region Development campaign. The railway will become an economical, high-speed, high capacity, all-weather passageway, which will play an irreplaceable role in the areas it links, in terms of economic prosperity and social advancement, the implementation of the opening up policy, in strengthening unity of different ethnic groups, as well as the wellbeing of all the residents along the way. Since its commencement on June 29^th, 2001, the Golmud-Lhasa Section （G-L Section） of the Qinghai-Tibet railway has been advancing safely and smoothly, with high construction quality. Up to now, the main structures along the whole section are nearly completed, experimental projects in the post-station section are almost concluded （except signal works）, tracks of 743 km have been laid. In 2005, the whole project entered its decisive stage. The goal of this year is： totally complete the sub-track works, nearly complete post-station works, completely link up the whole section. During the construction, three major obstacles must be removed, i.e., permafrost soil, deficient oxygen content in arctic alpine regions, and the fragile ecological environment. Up to now, remarkable achievement has been made in struggling with the three problems, and precious experience of constructing railway on permafrost plateau has been acquired. All the roadbeds, culverts and tunnels are of stable and reliable quality so far.     

The Features of the Ecological Environment and Protective Solutions along the Qinghai-Tibet Railway

On29June,2001aninaugurationceremonyfortheQuinghai TibetRailway,aprojectattractingworldwideattention,washeldsimultaneouslyattheCityofGolmudinQinghaiprovince,andtheCityofLhasainTibetAutonomousRegion,indicatingthattheconstructionofthesectionfromGolmudtoLhasaoftheQinghai TibetRailwaywasfullytocarryout.ThePlateauofQinghai Tibethasaveryfragileecologicalenvironment.ThestategaveprioritytotheissueoftheecologicalenvironmentalprotectionintheconstructionoftheQinghai TibetRailway.PresidentJiangZh…     

Asseessment of the Impact of the Qinghai-Tibet Railway on the Tourist Scenery in Tibet

Theqinghai TibetPlateauisendowedwithnaturalandgeographicconditions.These conditionsshapeupmanyuniquetouristresources,suchascolorfulgeomorphology,plentifulanduniquewildanimalsandplantsand pureandsimplefolkcustomwithancientculture,etc.Butasthetrafficisnotconvenientandthe trafficcostisveryhigh,toalargeextentthislimitsthedevelomentofthelocaltourism.Thelinesuccessivelypassesthroughtheplacesof culturalinterest,likenaturallyecologicallandscapesandagriculturalareas,semi agriculturalandmemi pastoralar…     

Experimental Study on Riprap Air-Cooled Roadbed of Qinghai-Tibet Railway

The riprap air-cooled roadbed and common roadbed experimental project were designed and carried on in Qingshuihe test filed, an area of warm permafrost category with the fine frozen soil along Qinghai-Tibet Railway, to decide the temperature field of the roadbed after railway construction. Based on ground temperature variation of natural hole, left and fight shoulder＇ s hole, the maximum thawing depth, and the deformation in these two kinds of roadbed were analysed comparatively. It showed that the riprap air-cooled roadbed had better effect of lowering ground temperature, lifting the maximum frozen-thawing depth obviously and decreasing deformation than that of the common roadbed. Therefore, the riprap air-cooled roadbed was a positive frozen soil protection measure for it effectively decreased ground temperature and protected permafrost.     

Investigation and Analysis on New Harmful Features Related to Frozen Ground in Permafrost Regions in Qinghai-Tibet Railway

1Introduction Harmfulfeaturesrelatedtofrozengroundaredefinedassuchphysicalandgeographicalfeatures soilhas,whichareharmfultoengineering,triggeredbyfreezingandthawingeffects.Constructingarailwayonpermafrostwill encountermanyharmfulfeatures,andontheotherhand,therailwaybuiltwillgeneratemoreharmful feature,whichmyposeathreattotherailway.So theinvestigationandresearchofthetypes,distributionanddevelopmentcharacteristicsofthe mainsecondaryharmfulfeaturesalongQinghai TibetRailway,toofferguidancetodesi…     

Spectral assessment of mesh adaptations for the analysis of the dynamical longitudinal behavior of railway bridges

Summary  Extensive studies, [1], concerning the longitudinal behavior of long railway bridges due to braking forces have been done by measurements in situ, [2], and by statical, [3, 4], as well as dynamical simulations. Thereby, the only consistent numerical realization with respect to the measured data was the dynamical one. However, the consecutive discretizations in space and time with time-dependent system matrices are extremely time consuming due to the moving loads and varying stiffness of the ballast under, and in front of, the moving train. Therefore, every effort should be made to optimize the discretization in the space domain. This paper presents a strategy for assessing the quality of finite elements in space and for applying an adaptive mesh-refinement for this special engineering problem. The method is characterized by a spectral assessment, comparing a certain set of eigenvalues of the actual discretization with those of a very fine and rather exact numerical model. The error estimator introduced in this paper controls a whole set of global eigenvalues with corresponding natural vibration modes in order to assess certain types of shape functions. Thus, the procedure estimates local modifications on the one hand and p-properties on the other by means of global indication. Received 30 August 1999; accepted for publication 26 September 2000     

地铁车辆铝合金车体与不锈钢车体的对比及发展

地铁车辆的车体材料选材,是关系到地铁运营的安全、可靠、快速、轻量、经济、适用的重大因素之一。文章结合当前国内城市地铁车辆车体的使用及选购情况,借鉴国外经验,针对不锈钢、铝合金车体的材料和结构特点进行分析、比较,并对两种车体材料的发展动向进行了探讨,为城市轨道交通车辆车体材料的选型提供依据。     

提高宁岢线与岢瓦线运输能力的对策

介绍了大秦铁路的基本情况,分析了宁岢线、岢瓦线的原设计能力、2008年以前的实际发送量及近3年的发送运量,对运输需求及能力适应性进行了预测,制定了宁岢线、岢瓦线"短平快"项目的实施方案。     

太中银铁路道岔三维定位系统的应用

以太中银铁路为例,介绍了道岔三维定位的设计方案及存在的问题,对道岔三维定位的测量方案进行了分析,阐述了工区对道岔三维定位数据的检查与运用。     

太原铁路局2015年春运调查分析

从主要车站乘车人数、距离别人数、春运省际交流人数几个方面对太原铁路局春运期间的客流情况进行了调查分析,并提出了下一步客运营销措施。