After working in the dry wood industry for a long time, there may be some occupational diseases. For example, when I take a train and others stare out the window at the scenery, my gaze can't help but drift downwards, staring blankly at the rows of sleepers passing quickly under the tracks.
The main player behind these woods under the railway tracks is actually pine wood. Why did you choose it? The answer is very down-to-earth, because it grows quickly and has a large output, in other words, it has a high cost performance ratio. Using it as a consumable is not a concern. But pine wood has a fatal weakness - crispy skin. You throw the fresh pine wood that has just been cut into the wild and it will be basically useless in a few years. It is naturally a "water absorbing maniac". When it has a lot of water, various fungi use it as a single apartment, and underground termites treat it as a free buffet.
Since the innate constitution is weak, we can only rely on postnatal recovery. To obtain the "work permit" for the railway system, Songmu must undergo a transformative transformation, which is commonly known as oil injection and anti-corrosion treatment.
This process may not sound complicated, but it is extremely rough. The workers will transport the cut pine wood into a huge sealed high-pressure tank, lock the door, and start vacuuming directly. Just when it couldn't breathe, high-temperature anti-corrosion oil appeared. Take advantage of the vacuum and pour oil in, then start pressurizing. Under this unreasonable pressure, the anti-corrosion oil desperately drilled into the wood's texture.
The gameplay of using a brush to paint on the surface of wood in the past is not enough to see here. When the train shakes, the layer of skin on the surface cracks open. The oil injection process involves deep penetration, during which the immersion depth often reaches 13mm or more. Don't underestimate the thickness of just over one centimeter, it's like putting a one-piece bulletproof vest on the wood. No matter how strong the wind or rain outside, the core inside is tightly protected. Those insects who originally wanted to eat and drink would probably have to buy station tickets and run away overnight if they smelled this oily smell.
After coming out of the high-pressure tank, the pine wood had completely turned black, shedding the greenness of the plant kingdom and successfully evolved into the "hard bones" on the railway.
When it is really laid on the gravel roadbed, the advantage will be completely hidden. You may ask, since you're afraid of rotting, why not use pure steel or pure cement? This is actually a cognitive misconception. When the train starts running, the vibration is very intense. Although the steel and cement are hard, they are too "rigid" and there is no room for retreat. Over time, all the connections will shake apart. Oil injected pine wood is different, it retains the subtle elasticity of the wood. Under the heavy pressure of dozens of tons, it slightly deformed and quietly released its strength. As soon as the train left, it bounced back to its original shape. Paired with its anti-corrosion and insect proof oil armor, it can firmly serve as the most reliable 'middleman' even in damp depressions or sandy deserts.
A section of pine wood that was originally swaying in the wind in the mountains and forests was cut, peeled, drained of air, and forcibly oiled under high pressure. Finally, it was buried deep in the rubble of the wilderness, silently carrying the tide of the times. The wood is still the same piece of wood, but it probably doesn't recognize the pine forest from back then. This is probably an alternative romance of wood in industrial civilization.
