In the past few days, extreme weather has occurred in many places across the country, bringing challenges to transportation. How to remove snow and melt ice? The reporter visited many places and found that a variety of scientific and technological means were put into battle to de-ice and melt snow on the roads that were being tested by bad weather, and they were in the front.
On February 5, in the city of Jinan, Shandong Province, a heavy snowfall fell all night. The reporter found that there was almost no snow on the Zhangqiu section of the Jinan-Qingdao Middle Line (the middle line of the Jinan-Qingdao Expressway).
The relevant person in charge of Shandong High-speed Group revealed the "mystery" to reporters: more than 8,500 inorganic heat pipes are laid under this section of the expressway, which can quickly conduct geothermal heat from the deep underground to the road surface, so that the road surface is like installing "floor heating" and maintain a relatively constant temperature. In case of ice and snow weather, the ice and snow can be automatically melted without mechanical or manual cleaning, and the whole process has zero energy consumption and zero emission, so as to achieve low-carbon, environmental protection and green.
In Changchun City, Jilin Province, staff have used "warm babies" on some roads. The technicians used a technology that makes the snow "disappear" in an instant, the self-melting snow pavement technology. They added antifreeze and ablation chemical materials to the pavement pavement materials, and through capillary action, the chemical materials were slowly released and dissolved, and finally realized the self-ablation of pavement snow and inhibited pavement icing.
In order to cope with rain, snow and fog, the middle line of Jiqing has installed meteorological detectors, visibility detectors, and bridge deck icing state detectors at key locations such as extra-large bridges, reservoirs, and rivers. They are like human eyes and **, they can sensitively perceive various meteorological conditions and give real-time warnings. The reporter learned that in some key road sections, in addition to the use of inorganic heat pipe ice melting and snow removal, the middle line of Jinan-Qingdao has also improved the driving conditions under winter ice and snow conditions through the construction of low-condensation ice pavement and the installation of intelligent ice and snow melting sprinkler equipment.
At the time of the Spring Festival, Hubei Expressway ushered in the peak of self-driving homecoming traffic. Sitting in the office of the Gaojiayan toll station, the inspector nursery rhyme is controlling the drone. At the same time, at the Hejiaping toll station, 21 kilometers away, a drone quickly lifted into the air and returned to the Zhujiayan evacuation lane. There is no need for manual operation by backfield personnel, and the traffic flow, weather, and manual operation of the main line section are transmitted to the computer in real time, and the road conditions are clear at a glance.
Spring Festival is also the peak period for freight transportation. The operation time of the cargo airport is concentrated in the early morning to early morning, which is the time period when the road is very prone to ice, and the de-icing and risk reduction work is particularly important.
At 6:06 on February 4, Ezhou Huahu Airport launched a first-level response to rain and snow weather, and closed the east and west runways at 6:27. The airport immediately organized 4 hot blow trucks, 1 friction coefficient vehicle, 2 runway inspection vehicles, 4 apron inspection vehicles, and 4 light inspection vehicles, a total of 15 support vehicles to carry out pavement de-icing and snow operations.
At 7:26, the west runway pavement was seaworthy and reopened; At 38 minutes, SF Airlines O37403 (Ezhou-Xi'an) took off using the west runway. So far, the flight support of Huahu Airport has returned to normal one after another.
At present, Huahu Airport has organized nearly 100 people to be on standby in the infield, observe the weather conditions and pavement temperature once an hour, conduct pavement assessment at any time, and blow snow and de-ice on the pavement of the running apron without interruption, so that passengers and freight are in normal order.
In ice and snow weather, bridges and tunnels are more likely to accumulate snow and freeze. Today, an "automatic sprinkler" device called the "Intelligent Ice and Snow Melting System" is in use.
Both sides of the Changshen Expressway Yellow River Bridge are covered with such equipment. According to the meteorological conditions, the intelligent ice melting and snow removal system can automatically calculate the time point of ice condensation on the bridge deck, and spray the bridge deck with liquid snow melting agent 30-40 minutes in advance. During snowfall, the amount of snow melter used is precisely controlled according to the amount of snow. The freezing point of the liquid snow melting agent reaches minus 30 degrees Celsius, which effectively prevents the formation of ice condensation.
*:Technology**.