Experimental study on the dredged slurry treated by intermittent vacuum preloading combined with straw drainage body
In order to clarify the reinforcement effectof dredged slurry treated by intermittent vacuum preloading combined with straw drainage body,indoor model tests were carried out on dredging slurry with different intermittent vacuum.The treatment effect of dredged slurry under different intermittent vacuum was studied.The results show that compared with the constant vacuum loading,the intermittent vacuum preloading can reduce the silting of the filter cloth of the drainage body,improve the vacuum transfer efficiency in the soil,and thus improve the reinforcement effect of dredged slurry after vacuum preloading treatment.Through comprehensive comparative analysis,for the straw drainage boday and dredged slurry used in this paper,the mode of vacuum load with intervals of 12 hours is more effective.Compared with the traditional constant vacuum loading,the accumulated water yield of dredged slurry is increased by 15%,the shear strength of cross plate is increased by 32.7%,and the water content of soil is decreased by 19.3%.In addition,the degradation of straw affects the vacuum transfer effect of the drainage body.With the continuous degradation of straw,the vacuum inside the straw drainage body starts to show an obvious decreasing trend after about 10 d.
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NSTL
万方数据
维普
