Because the structure of the natural sedimentary marine soil is disturbed under the disturbance,the soil will even become a flow,which is easier to drain. The improved method of drainage consolidation was obtained for high sensitivity natural sedimentary Marine soil'first perturbation drainage'. For effective implementation of the technology,model experiment was conducted by plastic drainage plate joint vacuum preloading. The performance of undisturbed soil and disturbed soil pressure when dealing with consolidation time,surface subsidence and treatment of soil water content and the strength and sensitivity of the difference of the vacuum preloading were studied comuparctiuely,and the microstructure of undisturbed and disturbed samples respectively after vacuum pumping were compared. The experimental results show that the in situ high strength natural marine sedimentary soil but not stable soil structure characteristics,the rapid advance of soil structure damage disturbance method can eliminate the soil structure caused by high sensitivity the unstable problem in disturbance,preloading drainage,compared with the original condition,the moisture content of the disturbance decreased by 31%,the sedimentation disturbance has doubled compared with the original state and the displacement has increased by about 4 times,and the yield stress and soil sensitivity decreased,reinforcement effect is obvious.
Science Technology and Engineering
marine sedimentary soil
scanning electron microscope