Test Study on Physical and Mechanical Properties of Plateau Bog Phase Peat Soil
As a kind of special soil,the physical and mechanical properties of peat soil have a great influence on the construction of the project.In order to investigate the physical and mechanical properties of plateau bog phase peat soil,a series of indoor physical and mechanical tests were carried out on peat soil samples belonging to the Quaternary bog phase stratum exposed in the foundation pit of the 14th Water Purification Plant in Kunming City,and the basic physical properties,consolidation and deformation properties,and shear strength properties of the peat soil were analyzed.The test results showed that:the peat soil showed poor engineering properties,with high water content,high liquid-plastic limit,high compressibility and low shear strength.During the consolidation test of peat soil,with the increase of the normal load received,its pore ratio was approximately linearly decreased,and the unit settlement was approximately linearly increased;the change rule of consolidation and compression coefficient was similar to the trend of increasing first and then decreasing;the compression modulus was inversely proportional to the compression coefficient which was reduced first and then increased.The straight shear test of peat soil has indicated that its shear deformation is dominated by plastic deformation,the damage mode is plastic damage,and the shear stress and shear displacement exhibit the law of growing first and then tends to stabilize.
plateau bog phasepeat soilconsolidationshear strength
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