What do you think is the significance of the completion of the Nankun Railway?

Nankun railway is a long trunk line built in the difficult mountainous area, the railway climbs up to the Yunnan-Guizhou Plateau from the coast of the Beibu Gulf, the relative height difference reaches 2010 meters, it is rare, which crosses the river, there are eight large ups and downs, the whole line builds 447 bridges, 258 tunnels, the project is arduous and complex, and there will be some engineering projects to create a number of records in China's railway construction. For example, the 183-meter-high Qingshui River Bridge is the highest railway bridge in China. Banqi No. 2 Bridge became the first railway curved beam bridge in China.

The 100-meter-high pier of the Badu Nanpanjiang Bridge has rewritten the record of 70-meter-high piers of existing bridges in China, and the V-shaped support on the high pier is used for the first time on China's railway bridges. The 9,392-meter-long Mihualing Tunnel is currently the longest single-track tunnel in China. Through expansive soil (rock), karst, soft soil area, debris flow, landslide-prone area and octave area, the railway promotes a variety of high-level technical countermeasures for foundation treatment and new retaining structures.

The high gas strata of the Jiazhuqing Tunnel and the long tunnel excavation in the high-stress area have greatly improved the advanced prediction and disaster prevention technology of tunnel geophysical exploration in China. Through scientific research and practice, these new technologies have raised China's road construction technology to a new level. Known as "the country's largest poverty alleviation project", the Nankun Railway is an important passage connecting the southwest and south China coasts, and is also the best shortcut for Yunnan, Guizhou and Sichuan to go to sea.

China's southwest region is rich in resources and has great development potential. The Nankun Railway is also another steel artery successfully built between the mountains and mountains after the Chengdu-Kunming Railway. The successful completion of the Nankun Railway indicates that China's scientific and technological level of building railways and building bridges and tunnels in difficult mountainous areas has entered the world's advanced ranks.

LS is too unkind.

Here it is, I'll answer it:

Source economic significance: bai is conducive to resource development and material export. It is beneficial for ZHI to give full play to the role of railways in economic radiation and promote export-oriented economic development.

It is conducive to the development of tourism resources and the development of the tertiary industry. Political significance: Conducive to the consolidation of national unity.

It is conducive to accelerating the speed of poverty alleviation in the southwest region. conducive to social stability; Strategic significance: It is conducive to accelerating the opening up to the outside world and developing an export-oriented economy.

It is conducive to consolidating national defense and defending the frontier.

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1. The terrain along the line is rugged, the proportion of plateaus and mountains is large, there are many mountains, and there are many rivers, and the construction project is difficult.

2. Karst landforms, caves and underground rivers along the line, and the geological structure is unstable.

3. The area along the line is the junction of plates, with active crustal activities and frequent geological disasters such as debris flows.

On March 18, 1997, Nankun Railway and Gaosong Road were completed in their entirety. On December 2 of the same year, the Nankun Railway was put into operation. The Nankun Railway passes through 19 counties and cities in Yunnan, Guizhou and Guizhou, stretching for 899 kilometers, covering 15 counties and cities in Guangxi and 7 counties and cities in Guizhou and Yunnan, covering an area of 1.24 million square kilometers.

The Nankun Railway was the railway with the highest scientific and technological content in China up to that time. Its completion marks that the scientific and technological level of Zhaozheng in the construction of railways and bridges and tunnels in difficult mountainous areas has entered the advanced ranks of the world.

More than 1,000 kilometers of railway lines built half a century ago have created 18 of China's railways and 13 of the world's railways, won the "National Science and Technology Progress Award", and was once called one of the "three miracles symbolizing the conquest of nature by mankind in the 20th century" by the United Nations.

The construction of the Chengdu-Kunming Railway is of great significance for improving the traffic situation in the southwest region, establishing a mobile and flexible strategic rear, cooperating with the construction of the Panzhi Wushouhua Industrial Base, developing the resources of the southwest region, and promoting the economic and social development and ethnic unity of the southwest region, especially the minority areas. Under the international situation at that time, it was even elevated to a height related to the life and death of the entire Chinese nation.

The construction of the Chengdu-Kunming Railway is commemorable because: the Chengdu-Kunming Railway crosses the geological fault zone, and the design difficulty and engineering difficulty are unprecedented; The mountains along the line are steep, the strange peaks are towering, the deep streams are dense, the ravines are vertical and horizontal, the topography and geology are extremely complex, and it is known as the "geological museum".

Its construction is the crystallization of 300,000 soldiers and civilians who fought bloodily under the approval and care of the chairman, creating a successful example for mankind to build high-standard railways in complex mountainous areas, and is a monument in the history of railway troops, which can be called a miracle in the history of road construction in the world.