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无碴轨道高速铁路精密测量数据处理 被引量:27
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作者 蔡士毅 李博峰 +2 位作者 石德斌 刘成 沈云中 《大地测量与地球动力学》 CSCD 北大核心 2008年第1期114-117,共4页
提出一种适合无碴轨道高速铁路精密工程测量的数据处理方法:先采用拟稳平差选择兼容的起算点,然后应用间接平差模型平差;在平差过程中,用Baarda粗差探测的方法逐个剔除粗差,再用Helmert方差分量估计方法合理地确定边、角的权比。计算结... 提出一种适合无碴轨道高速铁路精密工程测量的数据处理方法:先采用拟稳平差选择兼容的起算点,然后应用间接平差模型平差;在平差过程中,用Baarda粗差探测的方法逐个剔除粗差,再用Helmert方差分量估计方法合理地确定边、角的权比。计算结果表明:该方法能有效地提高控制网平差精度和可靠性。 展开更多
关键词 无碴轨道高速铁路 间接平差 拟稳平差 粗差探测 方差分量估计
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高速铁路无碴轨道用CA砂浆孔结构优化技术研究 被引量:4
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作者 贺奎 郑丽丽 +1 位作者 查炎鹏 吴敬朋 《混凝土》 CAS CSCD 北大核心 2010年第12期102-104,共3页
将宏观性能测试试验和微观结构测试手段相结合,研究了沥青乳液、发气剂、减水剂及消泡剂对CA砂浆性能及微观孔结构的影响,探讨了各组分对CA砂浆性能的影响机理。同时对该复杂砂浆体系的微观孔结构形成机理进行了分析。
关键词 CA砂浆 孔结构 可溶性发气剂 高速铁路无碴轨道
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Design of unballasted track bridges on Beijing——Tianjin intercity railway 被引量:3
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作者 Sun Shuli Zhang Wenjian Wang Zhaohu Su Wei Wu Cailan Bu Qinghao 《Engineering Sciences》 EI 2011年第4期59-70,共12页
Beijing-Tianjin intercity railway is the first newly-built passenger dedicated line with operating speed of 350 km/h in our country. During design,new ideas of bridge construction were carried out to ensure the requir... Beijing-Tianjin intercity railway is the first newly-built passenger dedicated line with operating speed of 350 km/h in our country. During design,new ideas of bridge construction were carried out to ensure the requirements of safety,comfort and stability of the train under high-speed condition. At the same time,concepts of environmental adaptability,service to transportation and comprehensive benefits were observed. On the whole line,long-bridge schemes were adopted and the most advanced technologies of unballasted track were utilized on bridges,the length of which accounts for 87.7 % of the total line. The success of design and construction of the bridges on this rail has accumulated valuable experience for high-speed railway construction on a large scale in the future,and made it a marking,demonstrating,and model project to follow. 展开更多
关键词 Beijing--Tianjin intercity railway unballasted track bridge design concept
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