Ancient to rammed earth to build the city, earth city wall encounter rainy days how to do?

The most important element of the ancient city is its own walls, very early on, some rulers attached great importance to the construction of walls, tall walls, mainly used to defend against foreign enemies, and later, with the development of civilization, the city's construction is also more and more developed, and some dynasties of the metropolis is a strict urban planning.

The technology of city building has also become more and more developed, and most of the modern buildings use concrete, replacing the previous masonry construction, but the construction of city walls is not the same as the general construction, the walls must be strong enough, otherwise it is difficult to defend against foreign enemies.

And one more thing, the ancient city wall has a great feature, is that it can be separated from a separate space, not only the city needs to have an outer wall, is the ordinary home will also create an outer wall, now we see inside the Chinese characters.

Like the word "country" is a circle of walls inside plus a king, and we often say that the feudal society, the real meaning is to seal the land to build the border, so the importance of the city wall in ancient times is self-evident. Then the early city wall construction, and later there are bound to be some differences, and before the Ming Dynasty, most of the city wall construction, most of the use of rammed earth type.

According to later archaeological discoveries, China has begun to use rammed earth to build city walls more than 4,000 years ago, the so-called rammed earth, which is compacted soil, this kind of soil is the most sturdy in the earth material, used to do construction materials is also very suitable.

During the Han Dynasty, rammed earth construction was already very common, and most of the Han Dynasty homes were built of rammed earth, and the famous Chang'an City was built on this basis.

From the current archaeology, we can see that in ancient times, the walls of the imperial palace and external cities, plus some tombs will be a large number of rammed earth, this building is relatively strong, but the problem is that such earth walls over time, walls will be a large area of shedding. Especially when it rains, not only is it possible to shed large areas, but it is also possible to walk and slip.