某城市污泥填埋场加固处置方案研究

发布时间：2018-03-04 10:12

本文选题：污泥　切入点：卫生填埋场　出处：《西南交通大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着我国城市污水处理厂处理规模的提高,污水厂污泥的排放量也随之增加。许多城市污水处理厂污泥经过脱水处理后运往城市垃圾填埋场内处置,由于污泥含水率高,有机成分多,多数填埋场采用单独堆埋。单独堆埋的污泥填埋库承载力较低,加之基础及地表防水措施不到位,使得污泥填埋场下部或坝体稳定性降低,垃圾填埋作业无法继续实施,会减小垃圾填埋场的原设计库容。本文以某城市污泥填埋场作为研究对象,通过对各种方法机理以及优缺点的分析,研究适宜的污泥库加固处置方案,并通过室内模型试验研究新的加固处置技术的可能性,为城市污泥填埋场加固处置提供有益的借鉴作用。本文首先通过实际污泥处置场的现状分析,掌握城市污水处理厂污泥堆置条件,了解污泥堆置场存在的问题,结合该城市对污泥堆置场的加固处理要求,分析各种处理处置方法原理以及优缺点。通过系统综合方法论证了真空预压排水固结原位处理方法是最佳的加固处置方法。第二,就传统真空预压法原理及适用条件进行了阐述,结合污泥填埋场堆积体物理及力学特性的分析,指出了传统真空预压法在处理城市污泥堆积场加固处置中可能遇到的不适宜问题,进而提出了采用超级井点法(SWPM)加呼吸井装置的真空预压加固技术,阐述了真空预压法改进技术原理,并提出了具体的实施方案。第三,通过室内模型试验,验证了汽化作用在真空预压过程中的影响,汽化作用在消除土体孔隙中附着水的可能性,试验还验证了井点井代替排水板的优势以及设置呼吸井装置对具有污泥性状的软弱基础加固处理的促进作用。
[Abstract]:With the increase of the treatment scale of municipal wastewater treatment plant in China, the sludge discharge from sewage treatment plant also increases. Many municipal sewage treatment plant sludge after dewatering treatment is transported to the municipal solid waste landfill for disposal, because of the high moisture content of sludge. There are many organic components in most landfills. The capacity of sludge landfill buried by single landfill is low, and the foundation and surface waterproofing measures are not in place, which makes the stability of the lower part of the sludge landfill or dam body decrease. The original design storage capacity of the landfill site will be reduced if the landfill operation can not be carried out. This paper takes a municipal sludge landfill as the research object, through the analysis of various methods, mechanisms, advantages and disadvantages, To study the suitable sludge bank reinforcement and disposal scheme, and to study the possibility of new reinforcement and disposal technology through indoor model test, This paper provides a useful reference for the reinforcement and disposal of municipal sludge landfills. Firstly, through the analysis of the present situation of the actual sludge disposal sites, this paper grasps the conditions of sludge stowage in urban sewage treatment plants, and finds out the problems existing in the sludge stowage sites. The principle, advantages and disadvantages of various treatment methods are analyzed according to the reinforcement requirements of sludge stowage in this city. The method of vacuum preloading drainage consolidation in-situ treatment is proved to be the best reinforcement and disposal method through systematic comprehensive method. The principle and applicable conditions of traditional vacuum preloading method are expounded, and the physical and mechanical properties of sludge landfill are analyzed. This paper points out that the traditional vacuum preloading method may meet some unsuitable problems in the treatment of municipal sludge accumulation site, and then puts forward the vacuum preloading reinforcement technology using super well point method (SWPM) and breathing well equipment. This paper expounds the technical principle of vacuum preloading, and puts forward the concrete implementation scheme. Thirdly, the effect of vaporization on vacuum preloading is verified by indoor model test. The possibility of vaporization in eliminating the adhesion of water in soil pores was also verified. The advantages of well point wells replacing drainage plates and the promotion of installation of breathing well devices to the reinforcement of soft foundation with sludge characteristics were also verified.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X703

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