Preface

According to national Medium and Long Term Railway Network Plan，the China’s railway service mileage will reach 175 000 kilometers，and 38 000 kilometers passenger dedicated railway will be constructed by 2025，the high speed railway network will be formed in which “Eight East-west & Eight North-south Railway Lines”main channel system is as skeleton，regional connecting line as linkage and inter-city railways as supplement.After the operation of Beijing-Shanghai high-speed railway，a main trunk line of milestone significance，the role of high speed railway in national economy construction and overall national strength improvement will become more and more obvious.

Ballastless track technology is widely adopted in high-speed railway construction.On the basis of preliminary study for high-speed railway，our country performs technology breakthrough and engineering practice taking the form of introduction，absorption and recreation，and forms Chinese ballastless track technology of complete intellectual property.

High Speed Railway Ballastless Track Construction Technology Series is the technological masterpiece for our engineering and technical staff in ballastless track on-site construction of high-speed railway through consistent exploration，breakthrough and innovation.The purpose for writing this series of books by engineering and technical experts is to promote and improve ballastless track technology，and to provide reference and suggestions on the standard and design of ballastless track.The writers of these series of books are from primary organizations of construction，careful and dedicated as we are，there may still be some omissions and mistakes，any comments from all users are welcome.

Beijing Times Grand Languages International Translation and Interpretation Co.，Ltd.prepared the English version.