电阻率CPTU在某农药厂污染场地评价中的应用

蔡国军; 邹海峰; 刘松玉; 杜延军; 陈偲

电阻率CPTU在某农药厂污染场地评价中的应用

1.
东南大学岩土工程研究所南京 210096;
2.
南光地质仪器有限公司温岭 317500

基金项目:

江苏省自然科学基金重点项目(BK2010060);江苏省交通科学研究计划项目(2010Y28)和东南大学基本科研业务费(3221001503)

详细信息

作者简介:
蔡国军,主要从事土体原位测试与环境岩土工程方面的研究工作.Email: focuscai@163.com

中图分类号: TU413
计量
- 文章访问数: 2999
- HTML全文浏览量: 127
- PDF下载量: 633
出版历程
- 收稿日期: 2012-05-29
- 修回日期: 2012-07-06
- 刊出日期: 2012-10-24

APPLICATION OF RESISTIVITY CPTU IN EVALUATION OF CONTAMINATION SITE FOR PESTICIDE FACTORY

1.
Institute of Geotechnical Engineering, Southeast University, Nanjing 210096;
2.
South-ray Geological Instrument Co., Ltd., Wenling 317500

摘要

摘要: 电阻率孔压静力触探(RCPTU)除了包含常规的孔压静力触探测试功能之外,还可以提供连续的电阻率变化曲线,因而在环境岩土工程领域具有广阔的应用前景。电阻率是表征土体导电性的基本参数,是土的固有物性之一,每种类型的土都有固有的电阻率,其变异可能意味着受到污染。本文根据某农药厂污染场地的RCPTU试验结果,分析了不同污染物类型对电阻率的影响,并初步研究了基于电阻率指标的污染物分布与污染程度的鉴别。考虑到孔隙比或相对密实度对土体积电阻率也会产生较大影响,利用RCPTU可测相对密实度的优点,本文提出可将实测电阻率值等效至某一特定的相对密实度下,再将等效电阻率值与相应的背景值进行对比分析,根据等效电阻率值与背景值的偏差量与偏差率进行污染范围与污染程度的确定。结果表明电阻率指标能够精确反应污染物的存在与受污染的程度。
- 电阻率孔压静力触探 /
- 农药 /
- 污染场地 /
- 有机物污染
Abstract: Resistivity piezocone tests (RCPTU) is not only include the conventional piezocone tests, the continuous profile of electrical resistivity can also be obtained through this test. Therefore, the RCPTU has a wide application prospect in the environmental geotechnics. Electrical resistivity is a fundamental parameter to characterize the conductivity of soil, it is one of the inherent physical properties of soil. Each type of soil has an inherent resistivity, and its variation probably means that the soil is contaminated. Based on resistivity piezocone test results on a contaminated pesticide factory site, the influences of different pollutants on resistivity are analyzed in this paper. The identification of pollutants distribution and the contamination degree based on the resistivity index is also preliminary studied. Considering that the soil bulk resistivity can also be influenced by void ratio or relative density, and it is advised measured resistivity should be equivalent to a specified relative density which can be measured by RCPTU. Comparative analysis between the equivalent and inherent resistivity is conducted, and the deviation and rate of deviation are used to determine the pollutants distribution and degree of pollution. The results show that the change of resistivity can reflect the presence and degree of pollutions well.
- Resistivity piezocone(RCPTU) /
- Pesticide /
- Contamination site /
- Organic contamination

HTML全文

参考文献(1)

[1] Lunne T,Robertson PK,Powell JJM.Cone Penetration Testing in Geotechnical Practice[M]. Chapman & Hall, 1997.

[2] 刘松玉, 吴燕开.论我国静力触探技术(CPT)现状与发展[J].岩土工程学报, 2004, 26 (4): 553~556.

Liu Songyu, Wu Yankai. On the state- of -art and development of CPT in China. Journal of Geotechnical Engineering, 2004, 26 (4): 553~556.

[3] Abu-Hassanein ZS,Benson CH,Blotz LR.Electrical resistivity of compacted clays[J]. Journal of Geotechnical Engineering, 1996, 122 (5): 397~406.

[4] Rinaldi VA,Cuestas GA.Ohmic conductivity of compacted silty clay[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2002, 128 (10): 824~835.

[5] Kibria G,Hossian MS.Investigation of geotechnical parameters affecting electrical resistivity of compacted clays[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2012(accepted).

[6] Campanella RG,Kristiansen H,Daniel C,Davies MP.Site characterization of soil deposits using recent advances in piezocone technology. Proceedings of the 1st International Conference on Site Characterization-ISC’98,Atlanta, Georgia, 1998, 995~1000.

[7] Campanella RG.Geo-environmental site characterization. Proceedings of the third international conference on site characterization ISC’3.London UK: Taylor & Francis Group, 2008, 3~15.

[8] Mondelli G,Giacheti HL,Howie JA.Interpretation of resistivity piezocone tests in a contaminated municipal solid waste disposal site[J]. Geotechnical Testing Journal, 2010, 33 (2): 1~14.

[9] Ahn T,Allouche EN,Yanful EK.Detection of heavy metal and hydrocarbon contamination using a miniature resistivity probe[J]. Environmental Technology, 2007, 28 (6): 701~711.

[10] 蔡国军, 刘松玉,邵光辉,童立元,杜广印.基于电阻率静力触探的海相黏土成因特性分析[J].岩土工程学报, 2008, 30 (4): 529~535.

Cai Guojun, Liu Songyu, Shao Guanghui, Tong Liyuan, Du Guangyin. Analysis of formation characteristics of marine clay based on resistivity cone penetration test(RCPT).Chinese Journal of Geotechnical Engineering, 2008, 30 (4): 529~535.

[11] 蔡国军, 刘松玉,童立元,杜广印.电阻率静力触探测试技术与分析[J].岩石力学与工程学报, 2007, 26 (增1): 3127~3133.

Cai Guojun, Liu Songyu, Tong Liyuan, Du Guangyin. Resistivity cone penetration test(RCPT) and data interpretation. Chinese Journal of Rock Mechanics and Engineering, 2007, 26 (S1): 3127~3133.

[12] Archie G.The electrical resistivity log as an aid in determining some reservoir characteristics[J]. Trans, American Institute of Mining Metallurgical and Petroleum Engineers, 1942, 146: 54~61.

[13] Arulmoli K,Arulanandan K,Seed HB.New method for evaluating liquefaction potential[J]. Journal of Geotechnical Engineering, 1985, 111 (1): 95~114.

[14] Jamiolkowski M,LoPresti DCF,Manassero M.Evaluation of relative density and shear strength of sands from cone penetration test and flat dilatometer test[J]. Soil Behavior and Soft Ground Construction(GSP 119),American Society of Civil Engineers, Reston, Va., 2001, 201~238.