青藏铁路西格段增建二线应急工程新建托勒车站施工的回顾与思考

研究目的：新建托勒车站是西格段增建二线应急工程重点控制工程，本文通过对托勒车站施工的回顾，旨在为类似工程提供借鉴经验。 研究方法：通过介绍施工便线的优化设计和封锁施工方案、新托勒站开站和既有托勒站关闭施工方案以及通过对施工进度的分析，引发思考，进一步得出结论。研究结果：按本文施工方案，在西格段增建二线应急工程关既有站开新站类似工程施工中，我单位提前10天率先在全段安全、正点开站，为西格段增建二线按期开通奠定了良好的基础。 研究结论：（1）在海拔3000m的高原、冬季及节假日组织增建二线和既有线改建工程施工时，应在正常作业指标的基础上预留24％的作业时间安排计划工期比较合理；（2）在类似工程中设置施工便线应按永临结合的原则进行优化设计；（3）在增建二线类似工程中设置施工便线，应结合工点前后线路设计特点和现场实际情况，并为后续工程创造有利施工条件进行优化设计。

Review and Thoughts on Reconstruction of Tuole Railway Station of Emergency Engineering for Construction of the Second Line between Lhasa and Golmud of Qinghai - Tibet Railway

Research purposes: Reconstruction of Tuole Railway Station was a key controlled project of emergency engineering for construction of the second line between Lhasa and Golmud of Qinghai-Tibet Railway.The purposes are to provide the construction experience to the similar project through the reviewing the construction of Tuole Station.Research methods:The thoughts were brought out and the conclusion was obtained through giving the introductions to optimum design of emergence auxiliary line for construction,program of closing sections for construction,the programs of new Tuole Station opening to traffic and old station closing traffic,and making the analysis of the construction procedure.Research results:The construction program helped my company to open the station to traffic safely 10 days ahead of time in the course of reconstruction of exiting station of emergence engineering for construction of the second line between Lhasa and Golmud, which provided a good foundation for the second line open to traffic on time.Research conclusions:(1) It is reasonable to arrange the construction procedure by leaving 24% time on the basis of normal operation indexes when construction of the second line and reconstruction of exiting line are conducted at 3 000 m high plateau in winter and on holidays.(2) For the similar engineering,the emergency line for construction should be designed in optimum according to the principle of combining temporary with permanent.(3) In construction emergency auxiliary line for construction of similar project,the optimum design should be made for creating favorable conditions for the continuous projects in combination with the design features of track before and after the working site,and real site conditions.