Research On Subgrade Soil Heave Test Instrument

Frost heave is a certain moisture content in soil, when the temperature dropped to below freezing, soil porosity of Shuining Jiecheng Bing, the increased volume of soil, a field of force. Different soil moisture content in different circumstances, the value of its frost heave is different. Freezing the basis of the overall elevation or partial elevation, a frost heave cracking and damage. Roadbed frost heave also enable a crack, a fracture of the road, the road leading to deformation of cracks, water seepage and undermining the growing, which can not be normal road use. In addition to the roadbed of the frost heave a frost heave damage, we will also have a basis for the protection of stone fracture and local elevation of lateral thrust. Just past the construction of roadbed and the degree of compaction from the perspective of CBR to carry out the construction control, the roadbed fill rate of frost heave consider very little or no consideration will be given. Therefore, the highway will be built in the first winter after the opening of the road there will be varying degrees of frost heave destruction, this will reduce the life expectancy of the road. Therefore, the roadbed is the impact of frost heave in frozen roadbed region, an important factor in the quality of the road. And the freezing of the major factors that control the soil from freezing the rate determined.Through research, analysis of the soil frost heave principle, the type of soil, water, temperature on the roadbed of the impact of frost heave from the cement concrete pavement and asphalt pavement materials and allow the formation of the contingency requirements of indicators, to allow the freezing of roadbed, And thus raised roadbed fill the request. According to the roadbed soil frost heave principle, the development of frost heave roadbed soil tester, including the roadbed soil frost heave-the composition and structure of data collection methods. Tester combination of freezing the rate structure and performance, determine the soil frost heave rate method.The project's research, the impact of the roadbed soil frost heave factors, to reduce the damage of frost heave roadbed guide, developed by frost heave roadbed soil tester with independent intellectual property rights, accurate measurement of soil freezing rates, research results Freeze in the quarter increased stability of frozen roadbed of guiding significance.