West Great Wall

A section of the Great Wall on the left wing of Jiayuguan is called the Ming Wall. On the south side of Guancheng, there is a pier on the edge of the 80-meter cliff on the north bank of the Daolai River, called Daolaihe Dun. From here, the Great Wall looks like a crouching dragon, crouching above the Gobi, and crossing the Gansu-Xinjiang Railway to the north. Take the Lanxin Highway and climb straight to Jiayuyuan, where it connects with Guanwaicheng. The Great Wall built by rammed loess is well protected, and is basically intact except for the broken places where roads and railways pass. The total length of the Ming Wall is 6,559 meters, and its interruption is 265 meters, accounting for four percent of the total length. The residual height of the Great Wall ranges from 3.5 to 4 meters, and in some places, the traces of the gable walls are clearly visible. The bottom is 4 meters thick and the top is 2.5 meters wide. Some sections have a bottom thickness of 3.5 meters and a top width of 2 meters. They are all rammed loess, and the rammed soil layer ranges from 13 cm to 19.5 cm. There are three Great Wall piers in this section, which are relatively complete. Basically, a pier is set up around four or five miles, and it is neatly arranged on the Great Wall line. The section of the Great Wall from Guancheng to the north is called the Dark Wall. The Great Wall starts from the "gate pier" on the northeast corner of Guancheng, and extends northward along the inner side of Montenegro, forming a parallel line with the eighteen slopes of Jiugou in the area of Montenegro, passing through the second, fourth and fifth production teams of Jiayuguan Brigade of Jiayuguan Commune. , crossed the Gobi, and went straight to the mountainside of Montenegro near the Huangcaoying 1 team of Jiayuguan Commune, blocking the large and small mountain passes to the west. In order to prevent the enemy from entering the Great Wall from the entrance of Heishi Gorge, another east-west broken wall was built at the entrance of Heishi Gorge. It is about 750 meters long, more than 3 meters high and 4 meters wide. It is inserted straight into the dark wall city wall from the west hillside. , blocking the mountain pass. This dark wall is 8,200 meters long, with 1,610 meters of interruptions, accounting for nearly 20% of the total length. The interruptions are all part of the farmland. Because of the local materials, there are three ramming methods. A section of about 5,700 meters of wall connecting the Great Wall is made of rammed loess, and the wall is 4.6 meters high. The bright wall and the dark wall are like adding two iron wings to the city, making the defense more strict. In order to make this section of the city wall more solid and parallel to the Great Wall, a ditch (also known as the outer trench) was dug 39-60 cm outside the Great Wall. Although it has been filled by wind and sand for hundreds of years, the ditch can still be seen on the top of the mountain. relics. The ditch stretches northward from the Beidaheyan in the south of Guannan, climbs the mountain when encountering a mountain, crosses the Gobi when encountering the Gobi, and reaches the Montenegro in the north of the Guan, with a length of 6,000 meters. The ditch is 9.8 meters wide at the top, 3.5 meters wide at the bottom, and 2.1 meters deep. This ditch played a role in protecting the West Great Wall in those days.