In February 2018, Shenyang Railway Bureau loaded my country's first 40-foot-half-height hard open-top heavy-duty container train, which was transported by double-layer loading and transportation of 50 ordinary flat cars, and headed to Yingkou Port Area at Dalian Jinqiao Station, marking that my country's new loading tool has been put into use.
Subsequently, Ningbo Zhoushan Port did not hesitate to cooperate with China Railway Shanghai Bureau, carrying 56TEU double-decker containers, and successfully launched the Ningbo Zhoushan Port to Shaoxing double-decker container train. As an advanced multimodal transportation organization method, it can increase the railway transportation capacity by up to 38%, so it has long been running on the railway lines of the United States, Australia and other countries.
The two GIF images below are the loading site of a double-decker container freight train in India. After reading the small circle, the first reaction is that it is only two floors, there is no plug-in, and it is not Indian at all.
Then you find that Indians will satisfy some of your unrealistic imaginations. In 2021, India's Pristine Logistics said it would adopt a three-tier container train transport scheme at Pali-KIIP. As shown below:
Whether it is a double-layer container or a three-layer container with a big brain, the operation of the railway line can not only optimize the mode of sea-rail intermodal transportation, but also carry out the reform of the transportation structure, and it is also quite economical. of emerging transport modes, why does the market seem to have no turbulence? The reason is very simple - such a mode of transport is more like a port's "shaved head and one head".
First of all, the "double-height box" train has requirements for the height of the railway track catenary. The so-called "catenary" is a high-voltage transmission line erected in a "zigzag" shape over the rails in an electrified railway for the pantograph to draw current. Let's take a look at this Gif first. Do you feel that the catenary in the picture is already higher than the sky?
According to the port circle (ID: gangkouquan), the above-mentioned Indian Railway, which is already in operation, has a catenary height of 7.45m on its planned double-deck container channel, which is reconstructed from an existing busy trunk line and is relatively less difficult. , and the height of the double-layer container catenary line previously built in my country is 6.45m, and there are not only large trunk line tunnels, but also flyover bridges, transmission lines, etc. If it is to be transformed, it will affect the whole body. The cooperation of railway companies, transportation bureaus and other enterprises and government departments. It is understood that at present, only Ningbo City has carried out pilot projects for the construction of a transportation powerhouse such as the innovation of double-layer container sea-rail intermodal transportation, to carry out new technologies such as improving the boundary of infrastructure buildings, adapting the height of pantograph catenary, new special flat cars, and matching the running speed of trains. Research.
Secondly, the existing track cannot ignore the safety issues brought about by the higher center of gravity of the double-height box. Let's take a look at the picture of the Indian double-height box driving fast on the track through a moving picture. It's hard not to wonder, wouldn't such a high center of gravity throw two boxes out when cornering, or just roll over?
The practice of Indians once again proves that it will not. First of all, their pictures are firm proof that the sturdy latch of a shipping container perfectly circumvents the "slung box" problem. Moreover, the international rail width is 1435 mm, but this double-decker container runs on a 1676 mm wide rail, so it can do whatever you want without fear of overturning. Therefore, if you want to ensure the safety of driving, it is also necessary to transform the rails of the double-height box, which feels like a high wall.
Finally, you can't ignore a series of problems such as the existing height and bearing capacity of various bridges and tunnels that have been repaired. This requires all parties to overcome difficulties to rectify the equipment and lines along the way, and finally realize the normal operation of double boxes. The transportation mode and allowable axle load of the main railway lines in India are similar to those in my country, and the dual-collection transportation under the condition of electrification is also developed. Although the three-way transportation has not been officially put into operation, they have already planned ahead to make better use of the advantages of the railway, which is really reduces the logistics cost.
The port circle (ID: gangkouquan) believes that railway double-layer container transportation has good economic performance compared with other container transportation methods. The economic benefits of double-layer container transportation are obviously affected by the volume and distance. At present, the countries that actively carry out railway double-layer container transportation in the world are all countries with vast territory, and their railway transportation has large line boundaries and relatively long transportation distances. Long characteristics, and China just fits this characteristic. Of course, the problem we need to pay attention to is that China's current sea-rail combined transportation accounts for about 2.5%, which is not comparable to the 40% ratio in the United States, and double-layer containers are an advanced version of sea-rail combined transportation. Popularization will take longer.
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