Study On The Characteristics Of Asphalt Pavement Of Typical Subgrade Soil Conditions In Xinjiang

The change of the subgrade soil strength roadbed causes unstable phenomenon, thus the strength and stability of the pavement structure layer also has the vital role, to a certain extent, also determines the pavement performance is good or bad. The influence factors of asphalt pavement performance is various. Paper for Xinjiang four kinds of typical soil of subgrade soil conditions on the asphalt roadbed using performance characteristics for investigation and analysis. In this paper, the gravel soil, saline soil, low liquid limit silt roadbed soil and desert on-site sampling, develop their physical and mechanical performance parameters of the experimental research. On the investigation of typical sections of pavement structure and usage of information analysis and detection, discusses different subgrade soil conditions on the structure and the influence of pavement performance of asphalt pavement. At the same time, according to the typical pavement structure parameters in Xinjiang, the finite element software ANSYS to various structural layers in the typical section of the road, the theoretical analysis of the bearing situation, to explore different modulus of soil base on the structure strength of each structural layer of pavement, the distribution of compressive stress and tensile stress.This paper introduces the different distribution of subgrade soil in Xinjiang, and sumed up the four kinds of typical sections of pavement subgrade soil in Xinjiang typical disease types. And combined with the indoor and outdoor test partition and Xinjiang geography and climate characteristics, put forward to adapt to the Xinjiang highway subgrade strength of soil base of the construction of the divided opinions. According to four kinds of subgrade soil under the condition of the typical sections of subgrade pavement technology situation of investigation and evaluation, and combining the theoretical analysis based on the finite element software. Analysis results show that the pavement structure and traffic levels under the same conditions, basic, saline soil, gravel soil of low liquid limit silt soil with desert road comparing performance evaluation rating for gravel soil>desert soil>saline soil>low liquid limit silt.