Abstract: The elevation difference between the original ground at the bottom of the embankment and the runway surface at Qingshanggou, which is the proposed third runway construction site of Chongqing Jiangbei International Airport, is 95 meters. Further, the elevation difference between the foot of the slope at the runway and the top of the slope is more than 165 meters. How to ensure the stability of high fill embankment is the key point of the project construction success. Drainage is a critical factor affecting the stability of high fill runway embankment of the Jiangbei International Airport. Groundwater, surface water and atmospheric precipitation are the main water sources in the construction period and in the runway operation after the construction. Based on the steep terrain and complicated subsurface conditions in Qingshanggou, an integrated drainage system was achieved by constructing a comprehensive drainage system for the drainage of the original foundation, fill embankment and the slope surface. This system effectively ensures the stability of the high fill embankment of the third runway project of Chongqing Jiangbei International Airport.

Key words: chongqing jiangbei international airport, runway, high fill embankment, drainage