Fatigue characteristic experiments of field airfield pavement structure

In order to analyze the reasonable pavement structure of field airfield, indoor and outdoor trial roads were built in Xi'an of Shaanxi Province and Leiyang of Hunan Province, load circle induced by aircraft wheel was simulated by using rigid bearing plate with 30 cm diameter, the experimental equipments such as reaction frame, hoisting jack and fatigue machine were used, the taxiing of aircraft at the same point of the pavement was simulated through manual and mechanical repeated loadings, the fatigue characteristic of the pavement with thin asphalt concrete surface and cement stabilized fine grained soil base(or subbase) was studied. Experiment result shows that the early carrying capacity of the recommended pavement structure is better, holistic elastic modulus is between 200~300 MPa, and its deflection is less than 1 mm in 60 days. The structure has good using performance, and will not be destroyed after ten thousands to hundred thousands times of takeoff and landing of airplane. The fatigue characteristic of the structure can meet the emergency requirement of field airfield.