China's bridge construction, the world's best, in other civilizations, can only be ferried by boats under the premise, China has created a splendid bridge history, the earliest small commercial bridge, is built in the Sui Dynasty.

The more well-known, the technology is higher, is the single hole of the Zhaozhou Bridge, the span of the hole is more than 37 meters, the whole field is more than 60 meters, the construction of this bridge is extremely difficult, the application of mechanics, and the mature arch bridge of later generations have the same effect, in the science and technology is not developed, the mechanics do not have a complete understanding of the premise, can build these bridges, that is almost entirely by experience.

In addition to the high-tech Zhaozhou Bridge, there is also the famous Anping Bridge, the overall length is more than 5 miles, and he is even a bay bridge, which runs through both sides of the bay.

Such a five-mile-long bridge is very restrictive, and on the river, a bridge like Anping Bridge is not very suitable, because it is almost impassable.

That's right, in the days before highways and railways, the important role of rivers was navigation.

The reason why Anping Bridge can be five miles long is because not only is the height very low, but the distance between the holes is also very narrow, and it is almost impossible to pass through any ship.

Zhao Xin has the knowledge of later generations, of course, he knows that the difficulty of building such a bridge is the lowest, as long as the foundation is laid, and then, without the slightest difficulty, it will be built like building blocks.

If it were a simple stone bridge, this would be the best choice, but now, Ding Haijun has another epoch-making weapon, that is, cement.

The emergence of cement has accelerated the construction of buildings, and one floor in 3 days is no longer a problem.

However, the prefabricated parts increase the reliability and speed of this speed.

By cementing prefabricated parts, the pressure and various data are calculated in advance, and perhaps, it is impossible to build the terrible cable-stayed bridges of later generations, or all kinds of giant arch bridges.

But compared with a single-hole bridge like Zhaozhou Bridge, it is still possible to upgrade it by a grade.

In the general bridge design, a bridge with a span of about 50 meters and a height of more than 20 meters is enough to pass the vast majority of river boats in the Northern Song Dynasty.

Even the famous Yangtze River has only begun to increase dramatically since Wuhan, and in the upper reaches of Chongqing, the narrowest point is only 800 meters.

At 800 meters, it is more than most other rivers in China, but it is already at the point where it can be built.

The Yangtze River and the Yellow River, not to mention for the time being, that is not now able to solve, even if Zhao Xin is quite confident in the current Ding Haijun's steel, but for the construction difficulty of the steel bridge, a series of technologies such as mechanical treatment are not in-depth, it is impossible to safely build bridges on the river, many times, only to increase the scale as much as possible, so that the buffer force is greater, such construction, in fact, in the construction of bridges in later generations, is a waste.

Zhao Xin did not study engineering, but the knowledge of the consulting era still allowed him to understand some of the key points of railway construction.

In the construction of the railway, after the plan is determined, bridges and other things are built in advance, compared to the flat ground, can be segmented at any time, the construction of the bridge, is the most difficult, a super difficult bridge, often started in advance, and the construction period is very long, in the end, other railway projects have been completed under the premise that the final completion.

Because most of the bridges cannot be built separately, you build a section and I build a section, it is not safe, as long as the calculation and closing, there is a slight problem, there will be a big problem.

The emergence of prefabricated parts divides the bridge into different parts, and after laying the foundation, it is used in a similar way to build blocks, with a series of methods such as steel, cement, welding, etc., so that these bridges are completely integrated together, which greatly accelerates the speed of construction.

On the entire report, these are also shown, but they are not mentioned much, some technical things, it is impossible for Ye Qingchen to explain, too many explanations, but it will make him confused, these technical problems, in the operation of the Dinghai Navy, have been tried, as long as the construction is carried out step by step, it will be fine.

The emergence of prefabricated parts, for the bridge, is a great benefit, the most afraid of the problem of cement, is the problem of hanging condensation, in the ordinary square, but with iron plates, hanging support below, waiting for cement to solidify, you can have strength, but in the constant flow of water, how to do.

Either steel structures or prefabricated parts, cement prefabricated parts are a good choice for steel that is heavier and does not have a good means of linking.

Zhao Xin gave two choices, but in the introduction, he focused on introducing Bianliang to Yingtianfu, and the tendency was quite clear.

After Ye Qingchen took a rough look, he knew Zhao Xin's purpose.

There is nothing wrong with having a goal, as long as there is no selfishness in it.

What is the place of Sansi, that is the financial center of the entire Northern Song Dynasty, about the bottleneck from Yingtianfu to Bianliang, of course, he is very clear, it can be said that this is already a stubborn disease that has plagued this section of the river.

A river that will freeze for more than two months in winter is itself a huge bottleneck, because of the method of transportation, many times, let alone ordinary businessmen, even the Privy Council and the Third Division, must make trade-offs, in summer and autumn, transport some materials back to Bianliang in advance, as long as there is a slight delay, maybe, it will affect the one-year plan.

This point, by now, in fact, has been solved somewhat, this time, accompanied by Zhao Xin to Bianliang, is a large number of icebreakers.

It was with the help of these icebreakers that Zhao Xin was able to come to Bianliang under the premise that the Bianhe River was already frozen, thanks to these icebreakers.

This kind of icebreaker, in fact, is only a matter of creativity, except for the steel chisel in the bow, which is relatively technical, the rest is nothing, after negotiating the purchase of 50 small boats, in the winter, as long as an army of vans is dispatched, the navigation of the entire Bianhe River can be guaranteed.

This is very important for the entire Northern Song Dynasty, it can allow the frozen winter, the resumption of navigation of the Bianhe River, even if it will be affected to a certain extent, but not at all.

About one-fifth of the year when the Bianhe River is broken, which represents a great reduction in the annual capacity, you know, Bianliang is a million-level city, simply eat, one million people per person 3 liters, the daily consumption is more than 30,000 stones, the entire ice period is about 80 days, this is 2.4 million stones,

You know, just because the river is cut off doesn't mean that the residents don't eat, and in winter, they eat a little more in other seasons such as summer.

Pure food, not all, consumption, daily necessities, all kinds of materials, even coal and firewood, these are also the necessities of daily life, in order to prepare for this, it is necessary to squeeze the already difficult transportation capacity, so that the entire demand for sorghum is not satisfied.

Under normal circumstances, in winter, the prices of all aspects of the entire sorghum will increase to a certain extent, and even some necessary materials cannot be transported.

With icebreakers, to a certain extent, it is to increase the capacity of the Northern Song Dynasty, and it takes time to popularize it, in winter, even if the icebreaker breaks the ice, it is suitable for the middle course, it is also some large ships, or ships that have undergone simple treatment and are covered with iron skin.

This needs to be set up in advance and costs more money, which is not something that everyone wants.

The consumption of the Northern Song Dynasty, especially after the addition of many products of Ding Haijun, the citizens of the Northern Song Dynasty found that there were so many things that could be used, and it seemed that they could buy a lot more things, but the cost was reduced.

Ding Haijun's items, even if they are similar to other items in the entire Northern Song Dynasty, are exactly the same, their prices will be greatly reduced, at least about 20%, and some new products are even cheaper.

Citizens, spending the same amount of money, but selling more things, the demand has also risen, which has caused great pressure on the Bianhe

You know, transportation, taxes, and other necessities cannot be reduced, so there will be a huge conflict in the middle.

You must know that whether it is the Huai River or the Beijing-Hangzhou Grand Canal, their transportation volume is quite high, that is, the Bianhe River is such a key point card node.

There are also local officials who have written to build an official road, just like Haizhou to Suqian, using land transportation instead of water transportation, but in the Gyeonggi region, there are many involved, and it is easy to do it in one county, and there are many state capitals, and there are too many things that need to be coordinated, which is not something that local officials can solve.

But it was reported to the center, and it was finally over, the key to this is that the result is unclear, the official road, there has never been a fee, the government builds, it needs to be maintained, and it needs to continue to invest, but the benefits it brings, or the original, this has no motivation.

But the railway, from the very beginning, is a commercial operation, faster speed, greater capacity, as long as it is built, there must be people who are willing, in this case, of course, profitable.

Even if Ye Qingchen has an excellent vision, he can be regarded as a person with some insight and vision in this era, but no matter what, he would never have thought that the future railway would burst out with much light.

Convenient, fast, large-scale delivery of goods, this is only a manifestation of the above, for the cohesion of the whole country, the potential in wartime, and even the ability to deploy troops, it is a great improvement, it can even create a lot of industry and value out of nothing.

With the emergence of new products, some things can be created according to these, for example, seafood from the seaside, in this era, rarely flows into the Central Plains, the commonly used preservation method, is salted fish, but under the premise that salt is high, how can such salted fish come in.

However, there really is a railway that is different, from Ding Haijun to Bianliang, that is, the distance is less than 1,000 kilometers, according to the horse-drawn train, the speed of an hour and 50 miles is 20 hours, day and night, that is, about a day.

No matter how perishable seafood is, as long as there are enough ice cubes to refrigerate, it will not spoil in a day, and even two or three days will be fine, which will give birth to new business opportunities.

Fan Lou in the Northern Song Dynasty is known for its good dishes, but he rarely gets this thing with seafood, even if it is alive, it is raised with water, and it is quickly whipped, and it is sent here in four or five days, and it has long been broken.

They may have some seafood-based dishes, but they are also some dried, through hair growth, the dried things are sent out, and then used in the preparation of dishes, such a production method, of course, can not be compared with real seafood.

In fact, the Northern Song Dynasty is more advocating the mountain treasures, under the inherent concept, the Central Plains is the real rich land, the seaside, generally poor and remote, the distribution of the place, in addition to the sea is full of dangers, there is no professional fishing boats, it is impossible to catch a large number of raw fish from the sea, and there is no way to talk about the dishes of the sea selection.

In addition to seafood, agree to spoilage, and quite delicious specialties, fruit is also a very important direction, a ride on the red dust concubine laughing such an allusion, as long as the railway is completed, it will no longer be a problem, as long as there is no obstacle to the danger of mountains and rivers, a large number of southern fruits go north, this is also a terrible change.

Even the final changes, even Zhao Xin may not be able to think, but if the traffic circle is expanded in one day, the number of people working in the Ding Navy will increase, and during the New Year's holidays, there will be a day or two to be able to go home.

Of course, Ye Qingchen will not know that the most important role of the railway is the operation of bulk commodities, and after the transportation capacity increases, the commercial operation is not limited to small and high-priced products.

Although the profits of these products are very high, but these products, how big are their sales, gold jewelry, good-looking, good-looking, and high profits, can not be eaten as food, only real bulk commodities, is the most long-term profit, before the grain, after the industrialization of the Ding Navy, it is a variety of industrial raw materials.

Zhao Xin gave two choices, but the keen Ye Qingchen finally found that what he could choose, that is, such a choice, which would be the busiest and the most economically profitable road. In fact, this road has also created many of the most in the history of the Northern Song Dynasty

The unique environment, coupled with the appropriate design, this has become one of the most profitable lines, not only quickly recovered the cost, and carried out the construction of the double line, and finally, and built a passenger dedicated, in short, this railway, in the history of existence, created a series of myths, has become the history of the Northern Song Dynasty railway, the status is quite high, can never get around the topic.