The Research Of The Carrying Capacity Of Engineering Foundation

With the rapid development of China’s highway construction, a detectable amount of the quality of roads is increasing, testing standards are gradually improving. Traditional detection methods have been difficult to meet the present needs of testing work, the development of advanced detection technology become the urgent matter. The main research results of the paper are as follows:1) Determine detection techniques and methods of the road carrying capacity, namely by comparing the various detection techniques analysis, the author put forward the comprehensive detection technology of the road carrying capacity, which gives priority to ground penetrating radar (GPR), supplemented by drop hammer deflectometer, and set up the test process.2) Through research on structure layer material dielectric properties, this paper establish quantitative relationship between pavement structural strength index and the permittivity on the basis of experimental methods. Generally, pavement structure layer material is composed of the cement concrete, asphalt concrete and the subgrade soil, etc. The bearing capacity of the cement concrete, asphalt concrete and subgrade soil sample is detected by GPR technology. Water binder ratio, temperature, moisture content, void ratio and density are respectively important factors that affect the electromagnetic wave velocity in the three specimens. By studying the relationship of electromagnetic wave velocity and strength under different influence factors, this paper establish the relation between the two, and then, the relation between permittivity and strength of three specimens are deduced respectively.3) Taking a concrete pavement in Beijing as the research object, this paper conducts the contrastive research on the distribution characteristics and regularity of the settlement under dynamic load and static load by FLAC3D software. The numerical simulation results reveal the impact mechanism of the foundation under dynamic load and static load, determine the impact depth and the characteristics, and provide scientific basis for its safety design.