粉细质泥沙淤积前后强度分析

Strength analysis of silt before and after deposition

针对潍坊港区底泥表层粉细沙硬壳层成型的强度规律进行水槽原位土工试验,明晰不同波况和流速情况下,土的剪切强度、贯入强度的变化情况,寻找粉状土的板结状态和波流状况间的内在关联,并对形成铁板沙的影响因素进行分析。通过试验得出结论:波的历程突变越大,海底土的强度增加越多;波高越大,海底土的强度增加越多;波流作用时间越长,海底土的强度增加越多。

An in-situ geotechnical test in flume is carried out to study the strength rule of the formation of the silty fine sand hard shell on the surface of the bottom mud in Weifang Port area,clarifying the change of shear strength and penetration strength of soil under different wave conditions and velocity conditions,searching for the internal relationship between the plate state and wave current state of silty soil,and analyzing the influential factors of the formation of iron plate sand.The results show that the greater the sudden change of wave history progress,the more the strength of seafloor soil increases;the bigger the wave height,the more the strength of seafloor soil increases;the longer the wave current action time,the more the strength of seafloor soil increases.