Application And Regularity Of Pressure Meter Test In Harbin Subway Project

The Pressuremeter Test referred to as the PMT, also known as the lateral pressure Test.It is a kind of in-situ test method by applying horizontal part of the drilled hole wall of lateral pressure, make the wall of the hole lateral expansion until destruction. Pressuremeter test of mechanical model is generally assumed to plane strain problem to deal with.Test results indicate as pressure curve(the relationship between the pressure variation with the increase of volume).The pressure curve within the relevant parameters are calculated through the mechanical properties and engineering properties of foundation soil.The author on the basis of reading organize and analyze the theory of the pressuremeter test and engineering practice paper, sorting and analyzing, on the basis of combination of Pressuremeter test data in Harbin subway engineering,of P-V curve characteristics of silty clay is analyzed.On the basis of the comprehensive pressuremeter test, static cone penetration test, standard penetration test and some laboratory test data, the pressuremeter test of plastic load method and the static cone penetration test, standard penetration test blow counts and tip resistance the index correlation analysis of laboratory test, the different regression equation and correlation coefficient of silty clay layer.Followed by side pressure curve to determine the shear strength indexes of soil, foundation bearing capacity, modulus of deformation(plastic load method), horizontal foundation modulus,static lateral pressure coefficient, etc.And has carried on the comparative analysis with other test methods, some conclusions are drawn.In this paper, the research of pressure test in Harbin area subway engineering follow-up survey and construction of promotion, and have certain effect on the local area of experienceds.