What is a tunnel? What does a tunnel mean?

To put it simply, the tunnel is to encounter obstacles in front, and if the road is not passable, a hole will be dug out, and it can be opened to traffic, just like there is an undersea tunnel.

In the tunnel through the mountain, the light will dim when passing through the tunnel, so you can't change lanes while driving in the tunnel

Tunnel is buried in the stratum of the project, the building is a form of human use of underground space, the tunnel can be divided into traffic tunnel, hydraulic tunnel, municipal tunnel, mine tunnel, military tunnel, etc.

Is it a classical Chinese explanation?

1).Tomb Road. "Southern History: Qi Yuzhang Literature Wang Wei Biography":

On the first road, the Song Changning Mausoleum tunnel went out of the first road, and said: "I am going into his tomb to find someone." Song Wang Anshi, "The Inspector Taiwei Presents the Servant Zhongzheng Hui Ma Gong Shinto Monument":

Engrave the head of the seal, make this inscription poem, the tunnel of Chen, forever. Qing Zhaolian "Xiaoting Miscellaneous Records, Yuling Smells Incense": "Fukai the stone gate of the underground palace, and smell a strange fragrance from the tunnel.

Qingfen is lovely, and if so, it has been a few days. ”

2).A passage carved out of the mountains or underground. Qing Dai Mingshi "Records of the Widow":

Dozens of thieves covered themselves with murderous tools, and arrows and stones could not be injured, and they dug tunnels to enter through the city. Yang Shuo's "Into the Sun": "Workers blew up mountains and dug tunnels. ”

A tunnel is a tunnel that is dug inside an obstacle.

A tunnel is a tunnel, haven't you ever been on the highway?

A tunnel is an engineering building buried in the stratum and is a form of human use of underground space.

In water conservancy projects, in order to convey water or discharge floods, it is often excavated through mountains to build a closed aqueduct, which is called a hydraulic tunnel. According to the different tasks it undertakes, it can be divided into discharge tunnels and discharge tunnels. Discharge tunnels are used to release the amount of water needed from reservoirs for irrigation, power generation, and water supply; Drainage tunnels are used to mate with spillways.

Partial flood discharge, discharge of tail water from hydropower stations, emptying of reservoirs for maintenance of key buildings or for war readiness, and discharge of sediment.

Length Requirements:Railway tunnels: 1) extra-long tunnels: more than 10,000m in length;

2) Long tunnel: the total length is more than 3000m to 10000m, including 10000m;

3) Medium tunnel: the total length is more than 500m to 3000m, including 3000m;

4) Short tunnel: 500m and below in length.

Highway tunnels: 1) extra-long tunnels: more than 3000m in length;

2) Long tunnel: the total length is more than 1000m to 3000m, including 3000m;

3) Middle tunnel: the total length is more than 500m to 1000m, including 1000m;

4) Short tunnel: 500m and below in length.

A tunnel is an engineering building buried in the ground and is a form of human use of underground space. Tunnels can be divided into traffic tunnels, hydraulic tunnels, municipal tunnels, mine tunnels, etc。Pronunciation: [suì dào].

Tunnel, shape sound. From 阜 (fù), then sound. Fu refers to the earth mountain, and some of the characters from Fu are related to architecture. Original meaning: Tomb road, the passage in the ancient tomb to transport the coffin to the burial chamber.

道, a first-level Chinese character pronounced dào, was first seen in oracle bone inscriptions. The original meaning of the Tao is the road. The meaning of the road can be extended as a verb to mean to take the road and pass through. From the original meaning of the Tao, we can also derive the methods, skills, laws, doctrines, and moral meanings of abstract meanings.

Stroke order of the tunnel:

Total strokes of the tunnel: 14 strokes. 1.

Horizontal folding hook Horizontal skimming hook丨(Vertical ..), (dot .

ApostropheOne (horizontal ..)Apostrophe

亅 (hook .ApostropheApostrophe

Apostrophe, (dot ., (dot .

Horizontal fold apostrophePound).

Total strokes: 12 strokes. 1.

, (dot .ApostropheOne (horizontal ..)

Apostrophe丨(Vertical ..)Horizontal fold

One (horizontal ..)One (horizontal ..)One (horizontal ..)

, (dot .Horizontal fold apostrophePound).

1. Tunnel refers to the passage dug out in the existing building or earth and stone structure, which is an engineering building buried in the stratum and a form of human use of underground space. Tunnels can be divided into traffic tunnels, hydraulic tunnels, municipal tunnels, and mine tunnels.

2. Military TunnelThe Tunnel Conference convened by the International Organization for Economic Cooperation and Development in 1970 combined various factors and defined the tunnel as: "a cavern with a cross-sectional area of more than 2 square meters built in any way under the ground for a certain purpose and by any method according to the specified shape and size."

Tunnels are tunnels, in water conservancy projects in order to transport water or discharge floodwater, often excavated through the mountains to build a closed aqueduct, called hydraulic tunnels. According to the different tasks it undertakes, it can be divided into discharge tunnels and discharge tunnels.

Discharge tunnels are used to release the amount of water needed from reservoirs for irrigation, power generation, and water supply; Discharge tunnels are used to release part of the flood water in the spillway, discharge the tail water of the hydropower station, empty the reservoir for the maintenance of the hub building or for the needs of war readiness, etc.

Tunnel means an engineering building buried in the ground and is a form of human use of underground space.

Tunnels can be divided into traffic tunnels, hydraulic tunnels, municipal tunnels, and mine tunnels.