A week later, Roland officially launched the construction of the steel bridge. Pen Fun Pavilion wWw. ｂiquge。 ｉｎfo

"Do you mean that I should raise two pieces of land in the middle of the river to serve as a foothold for the piers?" said Lian, looking at the boiling water, in surprise, "Are you going to build a real bridge instead of a pontoon bridge connecting the two ends of the river?"

"Well," Roland spread out the roll of paper in his hand, "considering the impact of the river, two pieces of land need to have a certain volume, and in order to cushion the impact, they need to be processed like this. ”

"It's ...... The appearance of the ship," Lian looked back at the drawings.

"That's right, a spindle to be exact," he nodded, "as long as it's parallel to the direction of the current, it has the least impact on its front." The question is, the Chishui River is almost ten meters deep, can you make the bottom of the river rise?"

"It is not difficult to do, Your Highness," replied Lian dryly, "leave it to me." ”

To be on the safe side, the ship carrying the witches is none other than the Town, with its wide concrete hull flat in the river, the helmsman still lightning, and Wendy providing the sail power.

However, in the past week, the latter has looked away slightly when he sees the prince, and seems a little uncomfortable. It wasn't until today that Roland saw her look up and look directly at him as she always did, and he heard a soft "thank you" as she passed by on board.

"You have to take credit for that," the nightingale whispered in his ear.

The Town soon left the dock and headed toward the middle of the wide river, where Carter had pulled up hemp ropes on both sides of the river, and the two red cloth bands tied to them were the expected places to erect the piers. After the cement boat reached the first point, Lian stood on the edge of the side of the ship and began to exert her abilities.

I saw that the surface of the river suddenly seemed to be boiling, surging upwards one after another, forming a "mountain bag". After a while, gravel, grass roots, and silt emerged from the churning water, and the water gradually became muddy.

I see, Roland thought to herself, her ability to not only transform solid ground, but also water, and it would be easier to lift the surface of the water than loose gravel. Although the rising water immediately rolled down in all directions, the riverbed was already rising little by little.

It didn't take long for a blue-gray clump of earth to surface, which looked very soft and emitted an unpleasant stench, and everyone couldn't help but cover their noses.

However, in Roland's eyes, this is the best fertilizer, and for hundreds of years, the bones of fish and other aquatic creatures, aquatic plants, and the feces of the inhabitants have been deposited in the soil little by little. If it weren't for the fact that it was inconvenient to transport, he would rather like to use the soil to fertilize the fields. Unfortunately, now it can only be shoveled away by hand and thrown directly into the river.

After clearing a layer and raising a section, he finally saw the solid yellow-brown soil, and the next thing was to repeat the process until both fields were trimmed.

Roland expects the process to last at least a week or so, but lifting the land out of the water means that it can be used directly, and the flowing river water will constantly carry away the sediment, and even the spindle-shaped land will not last for more than a decade without protection.

He called Karl Van Burt to his side, took out a charcoal pen, and described how to solidify the ground as he went.

"You mean, digging grooves at the edges of these lands and pouring in cement?" asked the current Minister of Construction, gesturing the drawings.

Not to be an outstanding member of the Royal Capital Stonemasons' Guild, Roland thought with satisfaction, he had just a few simple reminders, and he immediately understood his intentions.

"That's right, the length of each section should not exceed five meters, and the depth should be controlled to about one meter. After filling it with cement, the witch lowered the groove by one metre, and so on, to create a concrete wall that plunged straight into the bottom of the riverbed. "This plan was conceived by Roland after seeing Lian's ability, since she can control the ground to descend straight down, then she must also be able to bring the structures built on the ground into the ground together.

"What a clever idea," Karl's eyes lit up, "so that even if the river washed away the dirt outside, it would be blocked by the tightly wrapped wall." ”

Roland nodded, "The key point is to control the overall height of the sinking, if there is less, the bottom will not be able to be tightened, and if there is more, it will waste cement and delay the construction period, which is up to you to control." ”

"Yes, Your Highness," he replied, "and counting the silt and soft soil that has been dug up, I estimate that the whole height should be about twelve meters. ”

"In addition, after the cement wall is built around the perimeter, the land in the middle should not be covered with cement, and I will plant flowers and grass on it in the future. The prince admonished.

"Seed ...... Flowers?" Karl was stunned.

After all, these walls cannot be watertight, and if they are constructed in sections, there will be even gaps in the walls. The easiest way to further stabilize the soil is to plant grass - vegetation balances soil moisture and reduces soil erosion, especially the ultra-long root weeds after leaf magic modification, which can ensure that the soil is firmly cemented.

After briefly explaining the soil retention function of the plants, Roland turned to look at the busy workers on the riverbank, "How is the approach bridge being built now?"

"Gravel pavement is being laid," Carl reported without thinking, "and it should be completed this week." ”

According to the plan, the approach bridges on both sides of the river are made of rubble and cement, just like the western city wall, as long as the positioning and measurement work is done, the construction itself is not difficult. The bridge deck ramp is raised by seven meters from the ground, and is connected to the city street by a long gentle slope with a curve, and the height difference between the embankment and the water surface should form a clear height of 10 to 12 meters with the Chishui River when the iron bridge is completed, which is basically enough for inland river sails.

The main bridge, which has only one span completed, is being tested on the shore – and because of its small span and extremely low loads, Roland has no worries about its reliability even if he knows nothing about bridge engineering. In the era when there were no overloads after eight wheels, the 30-centimeter-high I-beam was a guarantee of stability, even if it was crowded with people, it was impossible to crush the steel beams. What's more, from processing to assembly and welding, Anna is single-handed, and the probability of tofu slag engineering is extremely low.

Similarly, its installation is also very simple, after the three-span main bridge is all prefabricated, it will be directly lightweighted by Hummingbird, and then handed over to lightning to lift in place.

When this steel bridge, which can accommodate two four-wheeled carriages side by side, stands on the Chishui River, the north and south banks are truly connected.

"Even the greatest stonemasons can hardly imagine such a magnificent bridge," Karl exclaimed, looking at the wide sparkling lake, "Your Highness, does this bridge of steel have a name?"

Roland thought for a moment, "Let's call it Chishui Bridge." (To be continued.) )