Research purposes: In order to analyze the characteristics of shield muck produced by the earth pressure balance(EPB) shield construction and its application, by carrying out indoor soil improvement tests for cohesive soil and fine sand, the slump value change law of cohesive soil and fine sand was studied with different mix ratio of bentonite slurry. Meanwhile, combined with the current concept of green subway construction, the comprehensive application and green application of shield muck are proposed.
Research conclusions: (1) The cohesive soil and fine sand improved by bentonite slurry have obvious flow plasticity. With the reduction of bentonite slurry mix ratio, the cohesion of improved shield muck decreases, and the slump of improved shield muck increases obviously. (2) The slump value of fine sand improved by low mix ratio of bentonite slurry shows a trend of rapid increase and then slow increase; and the slump value of fine sand improved by high mix ratio of bentonite slurry shows an increasing trend. (3) The comprehensive utilization of shield muck is gradually turning to green utilization, including green shield construction, green building materials, green industrial production, green city construction and other fields in response to the conception of green environmental protection subway construction. (4) The research results can provide a certain reference for the safe construction of subway shield and the comprehensive green utilization of shield muck.