摘要
Abstract
The third and fourth layers of muddy soft soil with high compression and rheology are the main geological reasons for the excessive deformation of deep foundation pit of shanghai area.To analyze the variation of the strength ratio Su/σc and the pore water pressure coefficient Af of the fourth layer of muddy soft soil with the consolidation pressure,the triaxial consolidated undrained test of the fourth layer of muddy soft soil is carried out.The results show that the fourth layer of muddy soft soil has structural properties.For a group of soil samples,with the in-crease of consolidation pressure,the strength ratio decreases and the pore pressure coefficient Af increases;The structural damage gradually;for seriously disturbed soil samples,the structure is completely destroyed.Consolidation was carried out under 100 kPa confining pressure,the compressibility increases,the strength ratio decreases and the pore pressure coefficient Af increases;After consolidation under confining pres-sure of 100 kPa,strain softening of the muddy soft soil will not occur during shear.The research results have certain guiding significance for deepening the mechanical properties of muddy soft soil deposited in marine.关键词
软土/固结不排水试验/结构性Key words
Soft clay/Triaxial consolidated undrained test/Structural分类
土木建筑
