Research Of The Pile-soil System Next To The Road Under Traffic Load

Along with the high speed developing of country economic, high speed and heavy load come to be the basic characteristic of road and railage, while traffic load will put on the buildings' pile-soil system nest to the road. The cyclic load will influence the material' s characteristic. Therefore, in this paper, the pile-soil system next to the road under traffic load will be caculated and analyzed . The main contents are as the following:Firstly,The paper generalizes soil' s dynamic stress-strain characteristic, and introduces soil' s force model, then generalizes sand and soft soil' s force characteristic under cyclic load, from the factors of dynamic shear modulus, dynamic soil shear strength, excess pore water pressure creep characteristic.Secondly, the paper gets the soil' s stress next to the road under static traffic load according to the elastic theory. Then it analyzes the pile-soil' s side friction and negative friction under traffic load. Based on two empirical formula models, the paper analyzes the pile-soil' s load carrying capacity degradation.Finally, by using the great FEM programme, this paper analyzes different factor' s influence on the soil under traffic load. Then according to a empirical formula model, the pile-soil system' s load carrying capacity is analyzed.