When the Badaohe Bridge was first designed, several friends had disputes.

In the end, it is better to build a steel bridge or a reinforced concrete bridge.

A steel bridge is a bridge that uses steel as the main bridge construction material, and a reinforced concrete bridge is a bridge that uses reinforced concrete as the main bridge construction material.

These two bridges should not be confused, they have their own characteristics and style.

It stands to reason that steel bridges appeared in the world earlier than reinforced concrete bridges, so it may be more reasonable to build a steel bridge over the Badao River first.

However, this is a bridge with a more rigorous design, and its construction requirements are many.

After discussion, the friends found that there were four difficulties in building a steel bridge for them.

First, the strength and stiffness of the steel bridge should be considered...... Badao Industrial Zone has been able to produce the world's best steel, but to achieve the strength and rigidity of the frame steel bridge, it can be guaranteed within 100 tons, and it is not enough to say that it is more than a few thousand tons.

Second, the construction of the steel bridge can not be mixed, and it must be constructed according to the unit in layers, which greatly delays the construction period.

Third, in order to ensure that the steel bridge can withstand the wind and rain for a long time, it is necessary to consider the maintenance of the steel bridge in the future, and it can only become more and more troublesome.

Fourth, although the strength of the steel bridge is large, it has weak corrosion resistance, so it is not only necessary to carefully select materials, but also need to be frequently inspected and repaired, and the cost is high.

It's like picking up a child to raise......

Of course, the advantages of steel bridges are also obvious, compared with reinforced concrete bridges, steel bridges can reduce their own beam height and reduce their own weight, suitable for building large-span bridges.

But the Badaohe Bridge does not need a large span, it can be done with a small and medium span!

The reinforced concrete prepiece has poor tensile properties, but it has strong compressive resistance, and we can do it like building blocks!

The construction of the first reinforced concrete bridge in human history began in this way...... In fact, it was the first time for a few friends to build a bridge like this, and they designed eight piers less than 200 meters above the river.

This is the safest solution they can find after considering all the problems, modeling and arguing with each other.

The bridge was ridiculed by some architects decades later, but a few friends couldn't hear it.

In the process of construction, several friends had to work around the construction site in shifts, and sometimes they had to work together, and everyone had no experience and could only cooperate with each other.

The people who crossed the river by ferry had high expectations for the bridge, and whenever they passed by the construction site, the people on the boat craned their necks to watch and talk...... A giant billboard on the side of the construction site shows a picture of the Badaohe Bridge, which has a train in the middle and two lanes on both sides, for two four-wheeled carriages to travel in parallel.

There are also a few little ladies painted on the sidewalks on both sides.

Song Ziqiang likes to be watched, and on this day he suddenly remembered a poem: a bridge flies north and south...... But what's next?!

Wu Dapeng said in his heart that I know but I just won't tell you, don't you think it's more useful to bury your head in pulling a cart than to look up at the road, then don't play literature and art, think about working.

Song Ziqiang shook his head and thought about it for a long time but didn't come up with it, so he could only give up and look at the project report again.

After Liao Yingzhong crossed the Badaohe River, she bought a ticket in the ticket hall of the railway station, which was not expensive, and it was only 300 yuan to the terminal Qidaohe Station.

Liao Yingzhong likes to seek order on the island, as long as there are many people who need to queue up, the people will definitely queue up.

It's orderly, and everyone follows the rules...... Only then can the world be harmonious!

However, he really didn't like the fact that there were uniformed patrolmen patrolling around every time he was in line, staring at the queue while fiddling with the rubber sticks of Eucommia ulmoides in their hands, as if they always wanted to drag someone out and beat them up!

He knew what public order laws were on the island......

Why bother?!

Virtue should be used to convince people...... The law should not be used to convince people.

With the words of righteousness, and the deeds of saints, it will eventually be as good as a stream.

After lining up to get on the train, he found a place to sit by the window...... He looked at the patrolman who was patrolling outside the car with great disgust, where there were many people, where they appeared!

Across from him was a man of his age, all dressed in similar attire.

The man arched his hand at him and asked, "The friend on the other side has just come from the Great Song Dynasty, right?" ”

"Exactly, it's only been three days ...... here"

Liao Yingzhong returned the salute.

"Your suitcase is not allowed to sit in the seat next to you...... You see that there is a shelf on your head, and it must be placed there, or else, a driver will make an inspection in a while, and he will rebuke you. ”

Liao Yingzhong hurriedly got up and put the suitcase away...... Even a suitcase has to be specified where to put it...... Harsh laws and stingy laws will make the people complain!

The man looked at the patrol officer outside the window and said, "Brother Tai doesn't know, in the past, there were more than twice as many patrol officers as there are now, and there are people breaking the law almost every day...... Now, we won't see each other for a few days.

Our king once said: 'Knowing etiquette with good manners, knowing honor and disgrace with sufficient food and clothing, this is only one of the prerequisites, and all morality will return to ...... only when all the personnel have learned to obey the rules.'"

Liao Yingzhong smiled faintly and said, "Of course, the words of the sage cannot be taken out of context...... If you rely on harsh laws and severe punishments, you are not afraid of public complaints? ! ”

The man said, "At first, I was not feeling well and complained a little...... Later, I found out that everyone had to obey it, so I slowly got used to it, and I didn't feel the presence of the patrolman, and I didn't see anything anymore, hehe. ”

Liao Yingzhong nodded, speechless for a while.

Outside the car window was an endless array of farmland, with patches of different crops and different colors, which quickly passed by Liao Yingzhong's eyes.

Only the telegraph line on that road kept running with the train......

The man added, "Everybody knows that the telegraph wire is copper, and if you cut it, you can sell it for money...... The Great Song Dynasty stipulated the death penalty for those who cut the thread, but there were still people who cut it; Our federal empire only stipulates three years of labor for those who cut the thread, but there are few offenders, why?

There is a kind of dog in the patrol police, called a police dog, and those who ask for it will all be brought to justice, so no one dares to commit it again!

And the Great Song Dynasty, I heard that the offender is often not available, so there are often people who dare to defy the law...... It can be seen from this that the law is not about being strict, but about whether it is implemented or not, hehe. ”

Liao Yingzhong didn't expect that there would be people who would use this kind of thing to compare!

He lowered his head and thought about it for a long time, but he didn't think of how to refute it.

At this point, the train turned off the one-way line and entered the first stop.

Just after parking, Liao Yingzhong heard a train honking three times, and looked from the opposite window, only to see another train driving over!

It's really hanging, if you dock late, you will inevitably bump into each other!

The man laughed again and said, "There will be no collision, both trains have their own travel times and speeds, and there are rails and telegraphs to announce each other, so don't worry." ”

Liao Yingzhong suddenly understood why the laws and regulations here were a bit strict......

PS: Thank you for the reward from Australian book friend Lao Wu.