Sihai network

What happened to the discovery of Tang Dynasty city wall in Chengdu? It provides material data for t

What happened to the discovery of Tang Dynasty city wall in Chengdu? It provides material data for the urban pattern of Chengdu. It is understood that on May 20, the Chengdu Institute of cultural relics and Archaeology announced the latest archaeological results: the discovery of the city walls of the Tang Dynasty, the Five Dynasties and the Qing Dynasty near the Tongjin bridge, which provides further supplementary information for the study of the change process, location and construction methods of Chengdu ancient city walls in different periods, and provides rare material materials for the study of Chengdu City and social outlook. It is worth mentioning that these walls are expected to be protected in the future, showing the profound historical details of Chengdu.

According to reports, since October 2018, Chengdu Institute of cultural relics and archaeology has carried out archaeological excavation on the site in cooperation with the construction of tongjinqiao listed land project of Chengdu Qingyang District Guotou construction and Development Co., Ltd., covering an area of about 2000 square meters. It is found that the rammed earth and brick masonry parts of an ancient city wall are in east-west direction and slightly arc shape, and the west wall is well preserved. It can be divided into Tang, Five Dynasties and Qing Dynasty.

The wall was first built in the late Tang Dynasty, with a length of about 170 meters and a width of 8.9-12 meters. The whole wall is rammed earth inside and brick outside. The residual height of rammed earth is about 1.6 meters. The method of bricklaying is to dig the foundation trench first, build a layer of rammed earth in the trench, and then lay a layer of mud with pebbles on the rammed earth, and then build bricking on it. In the late Tang Dynasty, there were brick walls on both sides of the city wall, with a remnant height of about 1.5 meters. The brick specifications were different. There were pattern bricks in the Han and Six Dynasties and plain bricks in the Tang Dynasty. There is apron on one side of the external wall. It is about 1 meter wide. The paving method is regular. It can be divided into inclined paving and flat paving. The outside of the apron is fixed with t-brick.

Only rammed earth wall can be seen in the Ming Dynasty city wall, which is overlapped on both sides of the Tang Dynasty city wall, without brick.

The Qing Dynasty city wall was built on the basis of the collapse and accumulation of the city wall in the Tang and Song dynasties. Only the north side foundation is left, and the wall and brick wall have disappeared. The way of construction is basically similar to the Tang Dynasty city wall. After the ground is leveled, the foundation trench is excavated. The foundation trench is rammed with triad soil with a thickness of about 33 cm. Red sand and stone strips are laid on the triad soil, and laid along or staggered joints. The joints between the stones are pointed with lime mortar.

The excavation of the city wall has provided additional materials for the study of the change process, location and construction methods of the ancient city wall in Chengdu in different periods, and also provided rare material materials for the study of the urban and social features of Chengdu.