Experimental Study On Properties Of Permeability Cement Soil

Cement soil, as a kind of good impermeability and relatively cheap permeabilitymaterial, can overcome the high elastic modulus and small ultimate strain of rigid concretediaphragm wall in some cases. Cement soil is being attached great importance, and widelyused in pit seepage, diaphragm wall engineering, retaining slope, slope reinforcement,bolsters of reservoir and shallow lakes and reinforcement of subgrade in road engineering.In order to improve engineering properties of cement soil, especially cement soilimpermeability, this paper mainly studies cement content, bentonite content, fly ashcontent effect of cement soil on compressive strength, shear strength parameter,compression modulus and impermeability, and conducts cement mix proportion of highimpermeability. Therefore, the study of additives in cement soil has its important practicalsignificance and engineering significance.Based on the main properties of cement soil, cement content and additives effect onmechanical properties of cement soil are analyzed through the indoor experiment study, themain work includes:(1) With the method of orthogonal experiment, take three factors, four levels, a totalof16group test method. The first factor is cement content, conducted four levels of9%,12%,15%,18%; the second factor is bentonite content, conducted four levels of0%,10%,20%,30%; the third factor is fly ash content, conducted four levels of0%,10%,20%,30%.(2) Unconfined compressive strength test, shear test, compression test, permeabilitytest are conducted for16groups of specimens, as a total of336specimens.(3) Range analysis and variance analysis of orthogonal experiment is conducted toanalyze the transformation rule of compressive strength, cohesion, internal friction angle,compression modulus and permeability coefficient with cement content, bentonite contentand fly ash content effect.(4) Matlab software is used to regress data, obtained the influence rules ofcompressive strength, cohesion, internal friction angle, compression modulus and permeability coefficient with cement content, bentonite content and fly ash content effect.