Settlement Control & Evaluation On High Embankment Of Mountainous Airport

High embankment, intensive earthquake, complex geological conditions accompanied with soft soil, and short construction period are the main characteristics of mountainous airports. Therefore, stability and deformation (total settlement and differential settlement) of high embankment during the construction of the mountainous airports is very important. On the east margin of Tibetan Plateau, Kangding airport, located at the southwest piedmont of Zheduo mountain extending along NW direction, is the second high airport with 4232.5m elevation, only inferiors to the Banda airport.. It is typically one of the mountainous airports. In this dissertation, taking the Kangding airport as an example, engineering property of fillings, ground reinforcement tests and numerical simulation of the high embankment deformation are carried out in detail. The research results show.(1) Different maximum dry density of fillings from different stock is obtained by heavy compaction tests. Maximum dry density and its optimum moisture content heavily depend on the grain content Under a critical value of coarse grain content, more coarse grain with high compacted dry density, above the value, more coarse grain with low compacted dry density.(2) High embankment stability and different settlement heavily depend on the bottom soft ground. According to the conditions, some reinforcement such as cushion, dynamic consolidation and rolling are suggested.(3) The settlement of high embankment is composed of the ground consolidation and the fillings compression. According to the conditions, some ground reinforcement and filling densitification such as dynamic consolidation, vibration rolling and impact rolling are suggested.(4) Settlement of the 3 high embankment in Kangding airport is evaluated by numerical simulation. From the north to the south, maximum settlement is sequentially 0.7m, 0.85m and 0.35m, distributed on the top of the slope; maximum different settlement is sequentially 0.05m, 0.03m and 0.03m, distributed on the junction strip whose dense varied remarkably from the runway to the lawn.