Abstract: Shield muck has gradually become a new type of solid waste because of large volume of chemical foam agents that are difficult to degrade from the perspective of ecological environment, the natural animals and plants and plantbased modified raw materials are chosen, and an ecofriendly shield foam agent (HSI type) is developed by orthogonal experimental methods. Furthermore, an ecofriendly performance test method and reference evaluation index of shield foam are proposed based on the impact of the removal and transportation of muck at the shield construction site on the surrounding ecological environment. According to the proposed method, a comparative experimental study of zebrafish toxicity and outdoor experimental fields of HSI shield foam and traditional chemical foam is conducted. The results show that the lethality rate of HSI shield foam agent to zebrafish is only onetenth to onefifth of the traditional chemical foam agent, and the effect of HSI shield foam on plant growth is much lower than that of traditional chemical foam.

Key words: shield muck, new type of solid waste, shield foam agent, ecofriendly