Study On The Aeolian Sand Compaction Principle

The desert is distributed extensively in our country, and how to improve the compact degree to enhance the roadbed quality is becoming an urgent difficult problem in the desert highway construction. This paper takes the aeolian sand of Mao Wusu desert in Shanmeng highway as the researched object, and researches the aeolian compacted standard,compacted characteristics and the pressure transferring regulation in the aeolian sand. It not only perfects the compact technology and theory, but has engineering practical value.This text beginning with the physical property of this segment aeolian sand, analyzes and studies the pellet form and its main characteristics, discusses the method of confirming the biggest dry density. According to the heavy compact experiment, draw the compacted curve, and receive that the aeolian has two compact conditions, dry and wet. In the laboratory andscene research, the patent production------impaction and vibration roller model designed byprofessor Yang Renfeng of Chang'an University is used, the compacted characteristics and the compacted theory in the impaction-vibration efforts are researched, and the compacted feasibility in natural condition is proved.In the experiment some pressure sensors are buried in the aeolian sand in certain regulation to collect the dynamic pressure signal to inspect the entire process, and then the pressure signal is analyzed to reveal the distributing and transferring regulation in the aeolian sand, and it settles an theory for deeply research. In the end of the paper, the "compactor-soil" dynamic model with two free degrees is built up, and the dynamic response of the roller model is simulated with MATLAB software.