STUDY ON THE SIMILAR MATERIALS RATIO OF SATURATED DOLOMITE IN LARGE SHAKING TABLE TEST
In order to carry out the research on the water excitation effect and starting mechanism of Daguangbao landslide in Anxian County.It is an important basis for this work to develop a similar material of saturated dolomite suitable for shaking table test.The validity of the test results depended on the correct selection of similar materials and the reasonable determination of the ratio.In this paper,the orthogonal design method was used.and water was selected as the admixture.Selecting water as admixture,9000 type ultra-fine cement as binder.Selecting 40 mesh quartz sand,iron powder and barite powder as aggregate.Taking 40 mesh quartz sand/solid material(A),iron powder/(iron powder+barite powder)(B)and 9000 type ultra-fine cement/solid material(C)as three factors of orthogonal design.Each factor was set with 4 levels,a total of 16 sets of ratio schemes.The water stability index,density,compressive strength,permeability coefficient,elastic modulus,water stability index and other physical and mechanical properties of similar materials with different proportions were tested.And the sensitivity analysis of the test results was carried out to finally determine the proportion of similar materials.Sensitivity analysis results show that:factor B plays a major role in density control;factor C plays a major role in the control of compressive strength and the elastic modulus;the A factor plays a major role in the control of the permeability coefficient.The developed saturated dolomite similar material can provide important reference and basis for subsequent slope model test.And can also be widely used in model tests in mining,water conservancy,geology and geotechnical engineering fields.
water stabilitysimilar materialexperimental investigationsensitivity analysis
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