Research On The Mechanical Properties Of Cemented Soil Under The Different Environmental Conditions

To safety and durability of in foundation pit impervious, embankment imperviouswall and other cemented soil engineering as the background, analysis the extent of damagein different freezing-thawing cycle times, different infiltration time of cemented soildamage. Because of the different damage degree in different freezing-thawing cycle times,different infiltration time conditions of cemented soil, will affect the safety and durabilityof the cemented soil anti-permeability engineering, so it is important theory andengineering significance to study the impact of the environment on cemented soil.This paper is based on two kinds of conditions which are different freezing-thawingcycle times and different infiltration time on the effect of cemented soil mechanicalcharacteristics in experimental research, the main content is as follows:(1) In the freezing-thawing cycle conditions, takes15%cement,85%clay of thecemented soil proportion. Researching the four different freezing-thawing cycle times (0time,3times,9times,15times) of the cemented soil mechanics performance test, andanalysing the influence of the freezing-thawing cycle of cemented soil shear strength,compressive strength, compressibility, porosity ratio and coefficient of permeability,established the changing rule equation the of shear strength, compressive strength andpermeability coefficient with the freezing and thawing cycle.(2) In the infiltration time conditions, take10%cement,90%sandy soil of cementedsoil,in four different infiltration time (0days,7days,30day,60days) of cemented soilresearching mechanics performance test, and analyses the influence of the infiltration timeon cemented soil shear strength, compressive strength, compressibility, porosity ratio andcoefficient of permeability, established the changing rule equation the of shear strength,compressive strength and permeability coefficient with infiltration time.The results show that cemented soil shear strength, compressive strength withfreezing and thawing cycle increasing times reduced, the cemented soil pore ratio andcoefficient of permeability with freezing-thawing cycle times increased. At the same time,according to the test data obtained the change rule of shear strength, compressive strength, pore ratio and coefficient of permeability with freezing and thawing cycle times. Thecompressibility of cemented soil with freezing-thawing cycle times increased, and at thesame time, the modulus of compression with freezing-thawing cycle times reduced. Theshear strength, compressive strength of cemented soil with the infiltration time reduced,void ratio and permeability coefficient of the cemented soil with the infiltration timeincreased. According to the test data obtained the time change rule that shear strength,compressive strength, pore ratio and coefficient of permeability with the infiltration. Thecompressibility of cemented soil with the infiltration time increased, the modulus ofcompression with the infiltration time reduced.