Research on mechanism of increment reinforced subgrade bearing capacity

In order to study geobelt effect on subgrade and mechanism of strength increment in reinforced subgrade, the author separately established their mechanics modes, analyzed the their stress state and relation, disclosed the function that geobelt change unit stress state of subgrade; Combined Mohr Coulomb destroy standard, analyzed the relation of those subgrades unit´s extreme stress state, found the increment of reinforced subgrade´s extreme vertical normal stress. The geobelt´s action can be seen that geobelt change direction of principal stress, subtract angle between maximal principal stress and vertical direction, increase the level direction stress, subtract shear stress, increase the vertical bearing capacity.