论文总字数：26075字

摘 要

随着经济的快速发展和城市化的快速推进，土壤污染问题日益显现。垃圾填埋场是采用卫生填埋方式下的垃圾集中堆放场地，垃圾卫生填埋场因为成本低、卫生程度好在国内被广泛应用。垃圾填埋场一般采用分层覆土填埋的方式对垃圾进行处理，堆积一层垃圾后再覆盖一层黄土，这样很容易降低垃圾的污染，但若不加以管理，更容易使周围土壤以及地下环境受到污染。因此垃圾填埋场的建设包括选址、设计与施工、填埋废物入场条件、运行、封场、后期维护与管理和污染物控制和监测等方面的程序。

本文首先给出了膨润土以及土—膨润土隔离墙的隔离特性；其次简单介绍了国内外垃圾填埋场在20世纪末至今的处理方法和研究现状。再者在归纳相关文献与工作的基础上，综述了影响膨润土的渗透系数和固结系数的因素、垃圾填埋场渗滤液的基本处理方法、影响膨润土墙隔离特性的因素以及介绍了孔压静力触探(CPTU)技术测试设备与测试原理和方法。最后通过具体的工程实例来说明CPTU测试对靖江市垃圾填埋场的膨润土墙隔离效果的评价，通过原位测试所得的基本土力学参数为场地的进一步利用提供可靠的环境评价依据和工程设计参数。文章最后得出结论CPTU技术应用垃圾填埋场等环境岩土工程评价在我国尚处于初步阶段，通过借鉴国外工程经验并不断改进、完善数据分析理论，将更准确而高效地作出垃圾填埋场隔离墙效果及工程评价，并利用CPTU的多参数和多功能性得到更准确更可靠的试验数据，具有广阔的应用前景。

关键词：膨润土隔离墙，CPTU测试技术，固结系数，渗透系数，垃圾填埋场

Assessment of isolation effect of bentonite cutoff wall in a landfill based on the piezocone penetration testing

ABSTRACT

With the rapid development of economy and the advance of urbanization, the soil pollution problem comes out increasingly. Landfill is the yard in sanitary landfill method of garbage, waste sanitary landfill site because the cost is low, the level of health in domestic is widely used. Landfill generally adopts stratified soil way to deal with rubbish, piling up a layer of garbage after covering a layer of loses, so it is easy to reduce the pollution of garbage, but if not managed, it is easier to make the surrounding soil and underground environment is polluted. So the construction of landfill including site selection, design and construction, the landfill waste entry conditions, running late, sealing field, maintenance and management and pollution control and monitoring program.

This paper first gives hydraulic barrier performance of the bentonite and soil-bentonite cutoff wall; landfill sites domestic and overseas are introduced in the second simple processing method and the research status of the end of the 20^th century up to now. Moreover in summarized on the basis of related literature and work, summarizes the influence factors of permeability coefficient and consolidation coefficient of bentonite, basic treatment of landfill leachate and the influencing factors of hydraulic barrier performance of bentonite cutoff wall, and introduces CPTU technology test equipment and test principle and method. Finally through specific engineering examples to illustrate the use of CPTU technology- pore pressure and cone penetration CPTU test evaluation of hydraulic barrier performance of bentonite cutoff wall on Jingjiang landfill, through the in-situ tests of the proceeds of the basic soil mechanics parameters for further use of site reliable environmental evaluation basis and engineering design parameters. Finally concluded CPTU technology was applied to evaluate landfill sites and other environmental geotechnical engineering is still in its preliminary stage in our country, through draw lessons from foreign experience and constantly improve and perfect the theory of data analysis, will be more accurate and efficient landfill barrier effect and engineering assessment, and use CPTU multi-parameter, versatility and get more accurate and more reliable test data, has broad application prospects.

Key words: Bentonite cutoff wall, CPTU, coefficient of consolidation, Hydraulic conductivity, Landfill

目录

摘 要 I

ABSTRACT II

第一章 绪论 2

1.1研究背景及意义 2

1.2垃圾填埋场及其渗滤液处理 3

1.3膨润土隔离墙的隔水性能及渗透特性 4

1.4现代多功能CPTU技术 4

1.5本文内容及研究技术路线 5

第二章 膨润土墙在垃圾填埋场方面应用的研究现状 7

2.1膨润土特性 7

2.2膨润土固结、压缩及渗透性能 7

2.3垃圾填埋场土—膨润土隔离墙的防渗性能、 8

第三章 现代多功能CPTU技术 12

3.1多功能CPTU概述 12

3.2CPTU测试设备介绍及操作方法 12

3.3CPTU试验原理 13

第四章 工程实例—靖江市垃圾填埋场 18

4.1场地地质概况 18

4.2CPTU试验目的及工作量 18

4.3CPTU试验成果解译分析 19

第五章 结论 31

致谢 32

参考文献 33

第一章 绪论

1.1研究背景及意义

随着经济的快速发展和城市化的快速推进，土壤污染问题日益显现。垃圾填埋场是采用卫生填埋方式下的垃圾集中堆放场地，垃圾卫生填埋场因为成本低、卫生程度好在国内被广泛应用。垃圾填埋场一般采用分层覆土填埋的方式对垃圾进行处理，堆积一层垃圾后再覆盖一层黄土，这样很容易降低垃圾的污染。垃圾填埋场的建设包括选址、设计与施工、填埋废物入场条件、运行、封场、后期维护与管理和污染物控制和监测等方面的程序。

环境保护部于2008年颁布了《生活垃圾填埋场污染物控制标准》（ GB 16889-2008），对垃圾填埋场建设的污染标准进行了详细的规范。该标准在修订过程中，对生活垃圾填埋场从场址的选择、建设、运行与封场后的全过程中的污染控制提出了更加严格的要求。标准补充了生活垃圾填埋场选址、基本设施的设计与施工要求，增加了可以进入生活垃圾填埋场共处置的一般工业固体废物、生活污水处理污泥等入场要求，并提出了经过一定处理、符合标准要求的生活垃圾焚烧飞灰等废物可以进入生活垃圾填埋场，对促进我国的生活垃圾焚烧设施建设也将有很大的促进作用。

剩余内容已隐藏，请支付后下载全文，论文总字数：26075字