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The Great Wall of China Construction • The Great Wall is made mostly out of granite and bricks. • In the Gobi Desert, the workers would create pounded earth to continue building the wall. • Easily destroyed Construction • The Great Wall was constructed with natural materials such as stone and compacted soil. • The Great Wall took up 3 million cubic meters of earth work. Beliefs of the Great Wall • Used to protect the Chinese. The twist in the wall represent the long back of the mighty dragon! • This was believed to be a good omen Purpose of the Great Wall • Prevent troops from the north invading Chinese territory. • Defend China from attacking Mongols. • Defense against ferocious nomadic tribes. • The Great Wall also embodies a great deal of protection during a battle. Purpose of the Great Wall • Worked as a safeguard the Silk Road trade. • Housed troops. Parts of the Great Wall • Watch towers were at regular intervals of 180 meters on the wall. • Held weapons, &house troops • Most signal towers were built on hilly areas for visibility. Parts of the Great Wall • Beacon towers were spaced at intervals of 15 to 30 miles along the wall. • Send messages faster than horse riding. • Some parts of the wall were connected and made tougher for further attacks. Construction During the Qin Dynasty • Constructed the wall with just loose stone. • Constructed by a wooden rectangular frame filled with loose soil. • Workers stomp on the soil until it was four inches thick. History • An important part to this process was detritus. • Detritus was used to make the wall more solid and sturdy. History • The Han dynasty extended the wall and made it more durable. • Built in the the Gobi Desert. • Started in 206 B.C. Construction During the Han Dynasty • They used: – Red willows, reeds and twigs. – Mixed with water and gravel. – Worked would stomp in the mixture to make it dense. – Repeated over and over. History • The Ming dynasty added the most modifications and adjustments. • Watch holes • Used both the Qin and the Han dynasty’s construction method. Construction During the Ming Dynasty • • • • Add tampered earth. Then add a layer of bricks. This method was such a success. They could build on steep mountains and inclines of up to seventy degrees! The Great Wall of China Documentary • http://www.youtube.com/watch?v=bLMVZ ohnCwA