How was Donghai Island Site in Rizhao, Shandong Province built? What technologies are used?

The invention of platform architecture and adobe occupies an important position in the history of ancient architecture in China. The construction site consists of soil platform, wall foundation, soil wall and slope protection. The construction procedure of this kind of construction site is: first build a rammed earth abutment, and then build or dig a ditch on the abutment plane to build an earth wall. The wall foundation is mostly yellow mud with stones, and the slope is protected outside the wall, and the indoor ground is covered with yellow mud and sand. Indoor foundation and slope protection adopt layered compaction method. The appearance of abutment buildings and the use of rammed construction technology pioneered the traditional rammed earth abutment wood structure in China, which is of great significance in the history of ancient architecture in China.