Abstract: It is a new developing direction to carry out non-stop reinforcement of airport pavement with excessive polymer material. Considering safety factors such as bearing performance, there is no engineering practice at domestic airports. Firstly, the polymer constraining force at channel bottom is studied by numerical simulation. Density of polymer solidified body is obtained according to the density-constraining force relationship when the polymer material is solidified. Results show that the degree of common pavement structure parameters based on slab corner filling polymer materials can be obtained with density of 0.303~0.372 8 g/cm³, density of polyer material at the edge of the plate is 0.263~0.315 g/cm³, density of polyer material at middle plate is 0.207~0.25 g/cm³. Based on the above results, the improvement of bearing capacity of pavement with different degrees of subsidence is analyzed. Results show that the bending stress at the bottom of pavement is reduced by 9.5%~25.7% at the plate angle, and this stress at the bottom of pavement is reduced by 7.1%~23.1% at the plate edge, pavement bottom bending stress is decreased by 3.5%~20.3% at the plate position .

Key words: airport runway, foundation subsidence, pavement bearing capacity, polymer grouting, foundation reinforcement