Study On The Design Of Pavement And Roadbed Structure Based On Wet Subgrade

Ideal roadbed filling materials are lacks of northwest of Shangdong province. Because of the high level of ground water, the bearing capacity of the embankment is low, the negative impact on the pavement performance is obvious. By analysing the pavement and subgrade systems stucture with no embankment in northwest of Shangdong province, this study try to ensure that the subgrade can easily be compacted and the subgrade can still maintain sufficient capacity and stability in the wet conditions.In this paper, firstly, analysing the physical and mechanical properties of local over-wet soil, making use of local industrial residue to improve the properties of local over-wet soil through tests of water losses,compaction,unconfined compressive strength and California Bearing Ratio (CBR) to improve the strength,stability anf compaction properties of over-wet soil. Secondly, based on different moisture conditions and degree of compaction, this paper presented a variety of amounts of industrial wastes for corresponding improved soil. The results of the study show that the use of industrial residue improved roadbed can solve the problem of over-wet soil compaction, and stability of the pavement and subgrade systems stucture.Due to the low modulus of resilient and poor mechanical properties of over-wet soil, this paper do much research on the analysis of pavement and subgrade systems stucture with no embankment in northwest of Shangdong province through ABAQUS. In accordance with the different wet conditions of the project, the paper provided a primary roadbed and the thickness of the recommended treatment.