【摘要】 我国工程渣土产生量大、综合利用率低,成为城市发展过程中亟待解决的重要环境问题,对其资源化利用是未来的发展趋势。文章提出了工程渣土资源化处理处置模式,为其资源化处理提供系统的可行方向。结合城市建设进程和不同的盾构施工技术,选取长沙市地铁施工产生的渣土为研究对象,通过取样及污染分析,确定了工程渣土污染成分并对盾构渣土的资源化提出基本方向。另外,提出了建筑垃圾再生砂石骨料的生产流程;分析了盾构泥饼中各元素含量,探究了渣土烧制陶粒的可行性及需要的条件;提出了泥饼制砖的两种方法、泥饼再利用为种植土的方法。同时,以长沙市地铁建设产生的工程渣土为背景,预测砂石的产生量及经济价值分析,盾构泥饼资源化利用后产生的经济价值。更多还原

【Abstract】 Large amount of engineering slag production and low comprehensive utilization rate have become important environmental issues that need to be resolved in the process of urban development in China, and resource utilization is the future trend. The paper put forward the resource treatment and disposal mode of engineering slag to provide a feasible direction for its future work. Combining the urban construction process and different shield construction technologies, the paper selected the slag generated from Changsha as the research objects. Through sampling and pollution analysis, the pollution components of the project slag were determined and the shield the basic direction of slag resource utilization was proposed. It also proposed the production process of sand and gravel, analyzed the content of each element in the shield mud cake, explored the feasibility of firing the ceramsite with dregs and the required conditions, proposed two methods of making mud cake bricks, and reusing the mud cake as planting soil. Based on the engineering slag generated from the construction of the comprehensive pipe gallery in Changsha, this paper predicted the amount of sand and gravel, and the economic value of the shield mud cake after its utilization.更多还原