White synchronization railway

Abstract

The invention relates to a technology for white synchronous railroad, which uses a glabrous white heat isolation layer to be coated on a railroad. A sleeper, in particular a steel sleeper, is coated with the glabrous white heat isolation layer, thereby substantially shortening the range of temperature change of the railroad, realizing the synchronous thermal expansion between the railroad and a roadbed, just like the synchronous thermal expansion between steel reinforcement and concrete in reinforced concrete, and completely solving the problem of the thermal expansion of the railroad.

Description

Technical field [0001] The invention paints a smooth white heat insulation layer for the railway, greatly reduces the temperature range of the railway, realizes the simultaneous thermal expansion of the railway and the track bed, just like the synchronous thermal expansion of the steel bars and concrete in reinforced concrete, and completely solves the problem of thermal expansion of the railway. Background technique [0002] The biggest problem in railway engineering is the thermal expansion of the railway. At present, there are two types of known railway thermal expansion control technologies, one is slotted railway, and the other is seamless railway; [0003] The seamed railway uses expansion joints between adjacent rails to absorb the thermal expansion of the railway. Its advantages are: simple structure, easy construction, and low cost; the disadvantages are: the range of expansion joints is too large, and the impact of wheels and rails is serious. And thus produce a s...

AI Technical Summary

Problems solved by technology

[0003] The seamed railway uses expansion joints between adjacent rails to absorb the thermal expansion of the railway. Its advantages are: simple structure, easy construction, and low cost; the disadvantages are: the range of expansion joints is too large, and the impact of wheels and rails is serious. And thus produce a series of serious consequences, such as: vibration and noise, serious wear and tear of the joints, frequent rail and plate breakage accidents caused by fatigue damage, endangering traffic safety; therefore, the allowable speed of the train is very low, generally at 100 Kilometers per hour or less cannot meet the needs of the vigorous development of the national economy;

[0004] Currently known seamless railway is the 'seamless line' railway, which welds the rails of standard length into long rails, and locks the long rails on a stable track bed with locking technology to limit the thermal expansion and contraction of the railway; however, the locking technology The locking force provided is limited, so the length of the rail is also limited, and its effect is to minimize the number of rail joints; its advantage is that the number of wheel-rail collisions is greatly reduced, and the resulting hazards are correspondingly greatly reduced. The allowable running speed of the train has been significantly increased, which can better meet the needs of the vigorous development of the national economy; the disadvantages are: rail welding, transportation and installation are very troublesome, the railway has extremely high requirements for the track bed and roadbed, and the structure of the railway is extremely complicated. The cost is extremely high. For example, the Beijing-Shanghai high-speed railway has a total length of 1318 kilometers and a design speed of 350 kilometers per hour. The budget has reached as high as 200 billion yuan. The estimated construction period is 4 years. For example, on the Chengdu-Chongqing intercity railway, the allowed running speed of EMUs is less than 200 km / h, and the ticket price is as high as 0.25-0.3 yuan / km. On the opening day of July 7, 2007, less than 100 tickets were sold at Chongqing Railway Station, which was deserted. There was a huge gap between the scene and the expected vigorous scene. According to the reporter's on-site investigation, 70% of the passengers thought that the ticket price was too high, and the time saving was limited, which was unacceptable and caused serious losses. However, lowering the ticket price also caused losses, which became a hot potato;

[0006] It can be seen that the thermal expansion problem of the railway is not only serious, but also difficult to overcome. Our predecessors have worked hard for hundreds of years, but the most expensive railway in the world only allows the operating speed to be increased to a mere 350 km / h

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