Study On Construction Of Silt Subgrade In Heze Zone

It is distributed a large area of Yellow River alluvial silt in Heze, many highways pass through this region. The content of silt grains is fairly high, the particle size is quite unity, the content of clay grains is very poor, the plasticity index is low and the water stabilization is weak. The construction of roads in these areas will face the difficult problem of road foundation soil compaction. The roads that have been built, having various problems.Heze a re anxious for the reasonable compaction method and technology.According to the study on experiments indoors of physical, chemical and mechanical properties for silty soil, the compaction principle of silty soil is revealed.Through constructing test road section, the compaction effects for five compaction process are compared, and the best compaction process is founded. According to a series of relevant experiment on the silt, it is founded that the main factors for resilient modulus is the water content and degree of compaction. Their relationship regression and the modulus relationship regression between indoor and outdoor were formulated. According to the study on slope protection for silt subgrade, the erosive mechanism of highway slope is analyzed primarily. The critical height and grade of protection for highway embankment is acquired by calculating. The design of erosive protection for highway is perfected.The study is able to provide the design parameters for road construction, as well as provide fundamentals and technical support for construction technology, At the same time,this research results provide measured data and theoretical models for further study of silt. It has practical value and theoretical significance.