◎Huajiakou Dangerous Section of Rammed Earth
Huajiakou Dangerous Section of Rammed Earth is located in the east of Huajiakou Village,Anling Town,and in the Jing County section of the Beijing-Hangzhou Grand Canal.According to the records of the Annals of Jing County,the Jing County section of the Beijing-Hangzhou Grand Canal was excavated in the 4th year of the Daye Period of the Sui Dynasty (608) and opened to navigation in the 7th year of the Daye Period of the Sui Dynasty (611).Up to the middle of the last century,the Jing County section of the Beijing-Hangzhou Grand Canal had been undertaking heavy shipping tasks for 1,367 years.Due to the lack of water resources,the transportation of the section has been interrupted from 1978 till now.(https://www.daowen.com)
Huajiakou Dangerous Section of Rammed Earth was originally built under the charge of Wang Weiren,the magistrate (Zhi Xian) of Jing County at that time,in the 3rd year of the Xuantong Period of the Qing Dynasty (1911).Since the dangerous section was completed,there was no record of dam breakage in the Huajiakou section of the Grand Canal,and it has been in use for 102 years.The dangerous works is 255m long totally and trapezoidal in shape and runs from north to south.Its top width is 13m,and the elevation of the whole section is 5.8m to 6.7m.The inner slope of the dam was rammed with loess,lime and glutinous rice slurry.Measured by step,the dam wall is 1.8m wide and 18cm thick.The dam bottom was built with the construction technology of anti-slide timber piles for dam foundation,and the outer slope and top were made of rammed earth.On June 22,2014,the Beijing-Hangzhou Grand Canal was listed in UNESCO’s World Heritage List,and its Jing County section and Huajiakou Dangerous Section of Rammed Earth officially became world heritage sites.