eleven month three Day, two thousand and twenty The annual National Science and Technology Award Conference was held in Beijing “ high-speed railway Ⅲ Technology and application of shaped slab ballastless track system ” The project won the second prize of National Science and Technology Progress Award.
Ballastless track system is one of the core technologies of high-speed railway. The use of layered concrete structure to replace the traditional granular gravel bed has the advantages of high smoothness, high stability and less maintenance. Japan and Germany have monopolized this technology for a long time. In order to meet the initial construction demand of high-speed railway, the localization of imported technology in China has formed I Type II Due to the differences in climate and geological conditions and technical limitations, the shaped slab ballastless track system has successively encountered problems such as high temperature arching and low temperature fracture, structural layer gap failure and life mismatch, and unstable track circuit information transmission, which significantly affect the track service quality, the maintenance cost is far beyond expectations, and local sections have to slow down. In order to comprehensively solve the above problems and break the foreign technical barriers, with the support of the state and ministries, the project has gone through more than ten years of technical breakthroughs. Through the collaborative innovation of production, education, research and application, it has overcome three major technical problems, namely, the collaborative work, stable and reliable construction, and high-precision and efficient construction of multi-layer structural systems under complex environmental conditions, forming a high-speed railway with independent intellectual property rights Ⅲ The complete set of technology of shaped slab ballastless track system has made China an original country of ballastless track system for high-speed railway “ Go out ” It has laid a solid foundation. The main innovations of the project include:
one Created speed per hour three hundred and fifty A new design method of ballastless track structure system for km high speed railway. Full scale model tests under different environmental conditions, long-term monitoring tests of real vehicle dynamic performance and operation status, and massive statistical analysis of data were carried out. A refined static and dynamic analysis model of ballastless track under multi field coupling effects such as train high-frequency dynamic load, temperature load, foundation deformation, etc. was created, revealing the deformation coordination mechanism and vibration transmission law of multi-storey structures, The design method and parameter system of the whole environment of ballastless track are proposed, which solves the problem of collaborative work of multi-layer structure system under the combined action of complex environment and high-speed trains.
two Invented speed per hour three hundred and fifty A new system of ballastless track structure for km high speed railway. Pioneered “ Vertical double-layer composite, longitudinal stress release ” The ballastless track composite structure system realizes stress release, track geometry and position maintenance and the same service life of each structural layer; The technology of ballastless track fastening with high elasticity, high fundamental frequency and high fatigue strength has been innovated, and the problems of rail fastening fitting with base plate and high-frequency resonance under large deformation have been overcome; The multiple insulation technology of ballastless track system under the environment of transient alternating strong magnetic field and continuous magnetic field of track circuit is innovated; The technical problem of structural system stability and reliability under complex environment and high-speed train interaction is solved.
three Innovative speed three hundred and fifty High precision and efficient new construction technology for ballastless track structure system of km high speed railway. It pioneered the high-precision and efficient intelligent manufacturing technology of two-way pretensioned prestressed track slab based on the flow machine method, developed a complete set of laying equipment based on inertial navigation and track precision survey network, formed the digital construction technology of ballastless track structure system based on the design of spatial alignment and centered on track height and smoothness, and solved the technical problem of millimeter level efficient construction of ballastless track.
Project formation criteria nineteen Project, presided over the preparation of International Organization for Standardization（ ISO ）Standard for ballastless track system; Obtained invention patent thirty-two Item, utility model sixty-six Items, including international patents eight Item; Software copyright three Item; Publication of monographs four Department, published papers one hundred and seventy More than; Won the provincial and ministerial grand prize one First prize three China Patent Excellence Award three Item. The project achievements have been popularized and applied in dozens of high-speed railway lines such as Beijing Shenyang, Beijing Xiong, Shanghe Hangzhou, and the mileage has exceeded one point two Ten thousand kilometers, for the successful development of Zhengzhou Xuzhou high-speed railway four hundred and twenty The kilometer crossing and reconnection comprehensive test have provided solid support, and have been applied in high-speed railway projects such as Indonesia Yavan, which is the only one that can “ Go out ” The achievements of the ballastless track system of high-speed railway have reached the international leading level as a whole.
CRTS Ⅲ Type slab ballastless track
