The Dynamic Characteristics Of The Highway Roadbed And Construction Technology

Subgrade and pavement mainly bear the vehicle loads under the transport conditions.The actual working state of the subgrade and pavement difference from the static mechanical calculation system. Especially to the high liquid limit and plasticity index red clay which is hard to lose water if it can fill the subgrade?It is the good subject in highway development. Therefore, this thesis commences on the improveing test of red clay, and goes deep research into the dynamic performance of red clay under dynamic load. Some conclusions and research achievement are obtained as follows.1 The physical and mechanical properties of red clay and the mechanical strength of modified red clay were researched by indoor tests.Some useful conclusions were obtained,the best mixing ratio of lime were fixed on,and some calculated parameters were got.6%lime was suggested to mix into the red clay in construction.Controlling the compactness and ensure good maintance would be benefit to its strength and stability.2 Combined with the large finite element software ANSYS,the tri-dimensional spatial timing coupled dynamic model of asphalt pavement structure were established.The traffic load were simulated by moving load, the dynamic performance were calculated under different working state under level pavement and rough pavement.3 The construction technology of modified red clay was studied.the construction process and the influence factor of compactness were analysed in this thesis. Furtherly, the construction technology was studied by analyzing rolling process,such as the controlling of water content,the choice of rolling machine and the thickness of the lossening layers through series of tests.