Somewhere in the west of Luoyi, somewhere in the Weishui Canyon, thunder sounds came from the railway construction site. These thunder sounds echoed between the walls on both sides of the canyon, making people's ears buzzing. King Yu of Wei, Wen Weining, looked at the thick smoke rising on the hillside, as if he was on the battlefield.

However, this is not a battlefield, it is a railway construction site. The crowds are not troops, but construction teams.

Yuwen Weining, who wore a "hard helmet" on his head and "labor protection boots" on his feet, is now a supervisor, supervising the construction of this railway crossing the Weishui Canyon.

He wanted to see with his own eyes how the workers overcome obstacles between the mountains and ridges, open roads when they meet mountains, and build bridges when they encounter water.

The Qin (zhou) and Qi (zhou) section of the Guanlong Railway, most of the sections are located in the Weishui Canyon. The geology here is complex and the mountain walls on both sides of the canyon are steep. It is very difficult to build a railway.

If it is a post road with carriages and people, it doesn’t matter if it is a narrower, steeper, and larger curves, but the railways run by trains are not good. First of all, the width should be enough, secondly, the slope should not be too large, and the turning radius of the railway should not be too small.

A train full of cargo often weighs millions of kilograms. In addition, the weight of the railway tracks has high requirements for the load-bearing capacity of the roadbed, so the requirements for road construction are much higher than those of the post road.

The Weishui Canyon Plank Road, which was newly expanded by the imperial court, has many parts of the route that are no longer suitable for railway construction. The Weishui Canyon Railway, which is now being built, requires a lot of manpower and material resources to open mountains, dig holes, and build bridges.

The purpose of splitting mountains and digging holes (diging tunnels) is to cut bends and straighten them, and the purpose of building bridges is to cross mountain streams, valleys and rivers including the Wei River. Therefore, the construction difficulty and construction volume of this section of railway are far greater than that of Guanzhong Railway and Longyou Railway.

Whenever Yuwen Weining thinks about the difficulties he has to face during construction of this railway, he will feel a headache and be full of fighting spirit.

After all, today is different from the past. In the past, people had no choice but to use the Weishui Canyon, but now there are many ways to do it.

For example, when digging a tunnel, workers first use a "wind drill" to open holes on the stone mountain wall, then stuff them in strong explosives, blow out a pit perpendicular to the mountain wall, and then continue to open holes at the bottom of the large pit, load strong explosives, and blow out deeper pits.

Then, the workers took the "wind drill" and the "breath pick" to open the hole in the big pit, and the hole became deeper and deeper until it penetrated the mountain.

After that, when it was time to build a bridge, when it was time to make holes, it was time to make holes. Countless workers were busy "threading needles and threading" to guide the railway that was like a long line, shuttled between the Wei River and the mountains on both sides.

Yuwen Weining has read the information. In the planned Qinqi section of Guanlong Railway, 140 tunnels must be dug, and 60 railway bridges that repeatedly cross the Wei River and other rivers must be built. Together with other railway bridges, ninety large and medium-sized railway bridges must be built.

This is just the planned tunnels and bridges. If necessary, more tunnels will be dug and more bridges will be built.

Thinking of these numbers, Yuwen Weining felt distressed. The Qinqi section of Guanlong Railway is about 300 miles long, but the cost has exceeded that of Longyou Railway. The problem is that the construction volume is huge, so the construction cost is extremely high.

For example, the Guanzhong Railway, because the terrain of Guanzhong is flat, even if the bridge is built, the span of the railway bridge will not be too large, and there is no need to build a tunnel.

The terrain of the Longyou Railway is more complicated. Some areas need to build tunnels, but the number of tunnels is not large. Although many areas have large undulations and require bridge building, the difficulty of building bridges between hills and hills is completely incomparable to building bridges between mountain streams.

Yuwen Weining has read the route map and detailed construction plan of the Qinqi section railway, and has a deep memory of the railway bridges and tunnels drawn on it. Such a expensive railway will be completed within one year, and the time is very tight.

Therefore, the workers are endless, and as officials of all sizes and sizes of supervisors, as well as himself, they have to stay on the construction site and solve various problems at any time.

Yuwen Weining felt that according to the difficulty of construction, if the Guanzhong Railway is fat, then the Longyou Railway is pork ribs with meat, and the Qinqi section railway is a hard bone.

However, there is another railway that is more difficult to construct, and it is not an exaggeration to call it iron bones.

......

South of Luoyi, among the mountains and ridges, valleys running north and south are arranged like comb teeth. A valley in the middle is on the ridge to the east, and a famous pass - Dasan Pass.

Dasan Pass is located on the Banpo of Dasanling, about 60 miles north of Luoyi. Since ancient times, the situation is extremely dangerous and is the "throat of Qin and Shu".

It locks the ancient Chencang Road across the road, and the road is full of the danger of Shu Mountain, and the energy increases the heroic power of Qin. Its location is not only the end point of Zhongnan Mountain, but also the beginning of Longshou's eastward starting, and it is high and majestic.

As long as an army is stationed in Dasan Pass, you can attack and retreat and defend. Therefore, Dasan Pass is a must-fight for military strategists of all dynasties.

Now, it is also a must-pass place for the railway entering Shu.

On the north of Dasanguan, on the half-slope railway, a train roared upwards and "climbed" upwards.

Because of the large slope of this railway, the train requires three locomotives to push and pull: two locomotives are pulled in front and one locomotive is pushed at the rear of the train.

Even so, the train was not moving fast. Li Jiancheng, who was standing on Guancheng, was worried when he watched the train struggle to "climb" upwards: If the locomotive could not pull and push it, causing the train to slide down the slope, that would be amazing.

Fortunately, the train finally arrived safely and stopped at a small station on the gentle ground near Guancheng. The loaders rushed up and began to unload the tracks loaded on the truck.

Li Jiancheng turned his gaze to the south valley and looked at the half slopes of the mountains on both sides of the Chencang Ancient Road, and the busy construction sites on the top.

Chencang is the ancient name of Luoyi. The Chencang Ancient Road in the south of Dasanguan is located on the east side of the valley. In the current valley, a tall railway bridge spans the east and west, connecting the railway construction site on the mountains on both sides of the east and west.

From time to time, thunder sounds came from time to time. The workers used fierce explosives and strong explosives to dig holes, and wanted to make passages in the mountains and ridges.

This railway connecting Shu and Guanzhong must pass through Dasanling where Dasanguan is located. Moreover, the mountainous area around Dasanling is very high, and the height difference between it and Luoyi to the north is extremely large.

If Luoyi is compared to the gate, then the Dasanling area where Dasanguan is located is like a threshold, a high threshold, which causes huge trouble: if the slope is too steep, the train cannot drive up.

The slope of the railway is limited. Once it is higher than a certain value, the train cannot climb up. Therefore, the huge height difference of Dasanling makes the railway only slowly detour among the mountains like a long snake, and gradually increase the height by redirecting.

As an official of the Ministry of Works, Li Jiancheng is now one of the on-site construction supervisors of Dasanling Road Section. He is very familiar with the design plan of the Dasanguan Road Section Railway and is deeply impressed by the designers of this line.

The Dasanling section of the railway entering Shu, from the starting point to the end point, is only twenty miles in a straight line. However, the route designed by the designer is nearly a hundred miles long, and all the routes are hovering back and forth on both sides of the valley to ensure that the train can go up the mountain calmly and “go down the mountain” after passing through the Dasanling area calmly.

This section of the railway is mainly composed of three horseshoe-shaped large bends and one "8" shaped spiral bend. It needs to pass through the valley twice, thereby cleverly forming a smooth passage so that the train can pass through this mountain area calmly.

Li Jiancheng admired this line and was impressed by all means. In order to build this section of the railway, the imperial court and the railway company had done their best to raise money to afford his huge project expenses.

The Dasanling section railway has a straight line distance of only twenty miles and a mileage of nearly a hundred miles, but it has to build forty-nine tunnels in the mountains, build two large railway bridges, and twenty medium and small railway bridges.

The construction cost of this section of railway is already half that of the Qinqi section of Guanlong Railway, and the construction difficulty is much higher.

If the entire railway entering Shu is based on the Lizhou Xing'an in the middle, the northern section (Lizhou Xing'an to Qizhou Luoyi) is basically shuttled through the mountains and ridges, and the Dasanguan section is the most difficult section to construct in the northern section.

Li Jiancheng felt that if the Qinqi section of Guanlong Railway was compared to a hard bone, then the Dasanguan section of the Railway entering Shu was an iron bone, and only steel teeth could chew this iron bone.

Fortunately, the construction team today has "wind drills", "pneumatic picks", fierce explosives, strong explosives, and various new construction machinery, so the court has the confidence to build the railway into Shu.

The thunder sounded again. Li Jiancheng looked in the sound, but saw thick smoke rising from the hillside in the distance. He and his colleagues looked at the construction sites on both sides of the valley, listening to the sound of train whistles and thunder from time to time, and his heart was full of heroism.
Chapter completed!