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中国高速铁路通用建造技术研究及应用
作者:赵国堂 
单位:中国铁路总公司, 北京100844
关键词:高速铁路  简支箱梁  刚性桩复合地基  钻爆机械化施工  无砟轨道  通用建造技术 
分类号:
出版年·卷·期(页码):2019·41·第1期(87-100)
摘要:

我国高速铁路设计速度高,控制标准严,覆盖区域广,建设速度快,工程建设过程中解决了许多科学问题和技术难题,取得了重要突破和创新成果,其中通用建造技术创新成果及应用对中国高速铁路快速发展发挥了重要作用。介绍了标准跨度桥梁的刚度与变形控制技术,分析了采用预制架设施工技术与旋挖钻成桩技术带来的桥梁建造速度优势;揭示了软弱土层刚性桩加固机理及对缩短路基变形稳定时间的影响;分析了基于全过程围岩变形控制理论及支护-围岩协同作用的钻爆机械化施工技术特点,以及对变形控制效果及效率的作用;阐述了不同类型无砟轨道的结构原理,提出采用非缓凝聚羧酸减水剂配制高早强混凝土的技术路线,提高了无砟轨道混凝土预制件生产效率。

The high-speed railway in China boasts high design speed, demanding control standards, vast covering areas and fast construction speed. A number of scientific problems and technological challenges have been solved during the process of project construction while major breakthroughs and innovations have been achieved, among which, the general construction technological innovations and their application have played an important role in promoting the rapid development of high-speed railway in China. For this reason, this paper presented the stiffness and deformation control technology of simply-supported box beam with standard span, and analyzed the bridge construction speed improvement resulted from the application of prefabrication and erection technology and auger drill pile forming technology. On the basis of the elaboration of the reinforcement mechanism of rigid pile in the soft soil layer and its influence on the reduction of subgrade deformation stabilization time, the paper further analyzed the characteristics of drilling-blasting mechanized construction technology based on whole-process surrounding rock deformation control theory and the synergistic effect of support and surrounding rock, as well as its influence on deformation control effect and efficiency. Moreover, this paper elaborated the structures and theories for different types of ballastless tracks, and proposed the technical roadmap of preparing high early strength concrete with non-retarding polycarboxylate superplasticizer, which improves the production efficiency of the prefabricated concrete parts for ballastless track.

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