| since April 2007, China’s railway began to carry out the sixth speed, which marks the full entry into the high-speed rail era in our country. Until the end of 2010, our operation speed reached per hour 350 km high-speed railways, Huning high-speed rail, Zhengzhou-Xi’an high-speed railway, Shanghai and Hangzhou high iron, and the running speed to reach 250 kilometers per hour Gao Tieyou:Chang Jiu railway, wide bead railroad, Fu Xia railway, with the Beijing Shanghai high iron fully completed to open to traffic, the 486 km per hour speed to become operator of the world’s fastest railway, lead the development of world high iron. Up to now, the total mileage of China’s high-speed railway has been built more than 8300 kilometers, while the construction of a total of 17000 kilometers of railways, these data are second to none in the world. But China’s current railway transport is mixed passenger and freight run, this greatly limits the effectiveness of passenger transport, so passenger dedicated line no ballastless track construction and use is cracial.The commitment to build a can be used for 3D measurement precision measurement trolley system, and sampling interval using special coding design, through a two-way fixed distance trigger, so as to realize the correction and calculation of the sample data, this way of measuring accuracy can usually be maintained at less than 0.75 per thousand. |
