Datang: Li Shimin begged me to rebel

In fact, the construction of this railway has already started, but most people think that it is repairing the official road. The route of the railway is basically not much different from the route of later generations. After coming out of Chang'an City, the railway will cross the Weihe River, and then Turn southwest and follow the west bank of the Wei River all the way to Chencang.

Because there are countless large and small tributaries on the east bank of the Wei River, and there are much fewer tributaries on the west bank of the Wei River, it is easier for the railway to advance along the west bank, and fewer bridges need to be built.

The first bridge over the Weihe River will be built as a road-rail bridge. Anyway, Li Ke has complete technology in his hands, but it will not be built as a double-deck bridge like the Wuhan Yangtze River Bridge in the future, so it is unnecessary.

It will use a single deck and widen on both sides of the railway to isolate traffic.Among them, the track of the train will adopt a single track, and it will be enough to establish waiting lines on both sides of the East and West Banks.

At the beginning of the construction of the railway, there will not be so many trains running, and there is no need to directly build a double track.

The main reason is that the double track has too high requirements for the steel of the bridge piers. Although Datang's technology has improved, it is too difficult to complete the construction of these steel materials thoroughly and accurately.

So it is better to build a low-end version first, and then come to the high-end version after the technology is improved in the future.

For the construction of the Weihe Bridge this time, the pier will adopt the same construction method as the pier of the Wuhan Yangtze River Bridge, the pipe string drilling method.

In fact, there is no need to adopt such a construction method on the Weihe River, because the Weihe River near Chang'an can find a narrow section of the river, and it may be better to use the concrete arch bridge, and there are many bridge experts in the Tang Dynasty who build arch bridges.

But the reason for adopting such a plan is to make technical reserves for the bridges across the Yangtze River and the Yellow River in the future, and the quality of the piers constructed by this pipe string drilling method can have a large margin.

In addition, it can be built at a higher height without affecting the current transportation situation of the Weihe River.

Even so, the bridge was built in the relatively upstream part of the Weihe River, and it did not affect the shipping situation from the Weihe River Wharf to the Yellow River Basin.

In fact, it is unnecessary for Datang to pursue direct railways across major rivers. Railways can be constructed in sections.

For example, the distance from Chencang to Chang'an, which is about 300 miles, is transported by railway, while from Chencang to Qinzhou, which is Tianshui County in the former Sui Dynasty, and Tianshui in later generations, the railway construction between the canyons is not so much because it has to cross the Qinling Mountains. Easy, don't build it first.

Then, on the way from Tianshui to Jincheng and Lanzhou in later generations, all sections that can be easily built with railways will be built in sections first.Construction of the more difficult sections in the middle can be postponed.

Even with such a segmented construction, the time from Chang'an to the Western Regions will inevitably be greatly shortened!

Especially in places such as Urumqi after entering the Longyou Road and stretching to later generations, in fact, there are quite a long part of the railway in the middle that is very easy to build.The same is true in the eastern region. The construction of railways between important cities can greatly save Datang's control over the frontier by adopting segmented construction, but the eastern railways have to be delayed.

Li Ke did not fully refer to the order of railway construction in later generations, but had his own considerations, because the strategic goals were different.

The reason why the construction started to go to the Western Regions first, instead of continuing to the east, is because the eastern part of the Tang Dynasty is the sea. Even if they are asked to rebel in these places, no one would dare to rebel, but the Western Regions is different.

If the staged railway can be built through Chang'an all the way to Yili, and Xinjiang Road will use Yili as the main seat, then the area that can be controlled will be too large.

The purpose and order of railway construction in different stages, different strategic purposes, and different factor periods are naturally different.

In the current Datang, the coastal areas are not in a hurry at all, because these places are in the pocket of Datang, and controlling the Western Regions is the strategic goal.So the railway to the Western Regions is the most critical.

In fact, it is not difficult to build a railway in Qinghai Road. The environment of Qinghai Road is much better than that of later generations, and many places are vast Gobi Desert. Fresh water needs to be found at a certain distance, because steam trains have water filling stations at certain distances.

These water filling stations cooperate with the outpost soldiers patrolling the railway, which can just form a living area, which can be regarded as enriching the life of the Qinghai Road garrison personnel.

It doesn't matter if you can't find fresh water. It is normal for trains traveling in special areas to undergo special modifications. How big a problem can it be to add fresh water to one car?

It is not difficult to go from Chihai to Mangyaai of later generations, or stop at Lenghu Town, and then start from Ruoqiang and follow the Taklimakan River, which is still abundant, along Yanqi and other countries to Yili. .

This railway is the most important and important strategic route of Datang in the future.

Because I have cultivated Yili, it means that Datang will have a foothold in the entire Central Asia region for later generations.

Speaking of which, because of this strategic goal, the most prosperous area in our Tang Dynasty may be the Western Regions for a period of time.And there is also a railway, that is, from Chencang to Gaoping (later Guyuan) and then to the later Yinchuan, along the Yellow River to Bayannur, and then to the east.

These two railway lines were probably the last ones when the railways were first built in later generations because there was no strategic need.

But this period is completely different from later generations. The construction of these two railways means that the Tang Dynasty controls the Western Regions to the west, the entire grassland to the north, and can even be built all the way north to Lake Baikal.With these two railway lines, it means that Datang can truly and completely solve the pain points of the Central Plains dynasty ruling nomads!Thoroughly let them learn to sing and dance!

We Datang, the future can be expected!

Yang Anning and Yang Li were asked to send Sun Simiao off, while Li Ke was lying there thinking about what technology to develop next.

Here, sending Sun Simiao out, Yang Anning hesitated for a moment, and then asked in a low voice: "Sun Zhenzhen, you just checked His Highness's pulse, is His Highness healthy?"

"No problem, it's fine. In fact, it's not like you don't know what's going on with his injury. Don't worry." Sun Simiao said with a smile.

"Then... Reverend Sun, take your pulse. You can tell if His Highness is okay in all aspects." Yang Anning bit her lip and asked.

Sun Simiao was stunned for a moment, then looked at Yang Anning, suddenly realized, he couldn't help laughing twice and said: "Little lady, don't worry, there are some things, let nature take its course, what should come will come naturally."

"But... but my health is fine, Xiaoli and the others are fine..." Yang Anning was somewhat shy, and Yang Li who was beside her also looked at Sun Simiao expectantly.

"Haha, you believe me, this matter, don't force it, it will happen faster instead." Sun Simiao laughed twice.

"Then I would like to thank Master Sun." Yang Anning and Yang Li finally came to express their thanks, sent Sun Simiao to the carriage, and sent him away.

After Sun Simiao left, Yang Li immediately smiled and said, "Sister An Ning, don't worry, Your Highness is fine."

"Then you see, neither we nor His Highness have taken any measures. It's been a long time, and we haven't done anything. I'm a little worried, but we don't care. This is very important to His Highness." Yang Anning said in a low voice.

"Renren Sun said it's okay, so it's definitely okay. Sister An Ning, don't worry, if it doesn't work, I'll go with you to find His Highness today, so that His Highness can accept the job." Yang Li laughed in a low voice.

"Your Highness is still injured, what are you talking about, we two went, even if it didn't turn out to be nonsense in the end." Yang Anning smiled and pinched her.