岩土施工技术应用于污染场地修复中的问题及研究
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摘要
在污染场地原位修复技术中,修复药剂在污染土壤中的分散程度是保证修复效果的关键,因此岩土施工技术在上海低渗透性污染场地中的应用越来越多。本文通过小试研究了固化剂(水泥)的投加对修复效果的影响,得出6%固化剂的添加提高了过硫酸钠对污染物的去除效果,同时水泥土无侧限抗压强度能达到1000kPa左右,能够克服岩土施工技术在场地修复中地基承载力不足的问题,有利于该技术在工程项目中的应用和推广。
The dispersion of remediation agents in contaminated soil is the key to repairing contaminated sites to ensure their suitability for construction. Therefore, geotechnical construction technology, which involves the use of remediation agents, is popular in Shanghai's low permeability contaminated site. In this study, the effect of adding a curing agent(cement) on the repair of contaminated soil was investigated via a small test. It was found that the addition of 6% curing agent improved the pollutant removal effect of sodium per sulfate. Further, the unconfined compressive strength of this cement soil reached around 1000 kPa, over coming the problem of the soil's insufficient bearing capacity as foundation for construction. Thus, this is beneficial for the promotion of geotechnical construction technology in engineering projects.
The dispersion of remediation agents in contaminated soil is the key to repairing contaminated sites to ensure their suitability for construction. Therefore, geotechnical construction technology, which involves the use of remediation agents, is popular in Shanghai's low permeability contaminated site. In this study, the effect of adding a curing agent(cement) on the repair of contaminated soil was investigated via a small test. It was found that the addition of 6% curing agent improved the pollutant removal effect of sodium per sulfate. Further, the unconfined compressive strength of this cement soil reached around 1000 kPa, over coming the problem of the soil's insufficient bearing capacity as foundation for construction. Thus, this is beneficial for the promotion of geotechnical construction technology in engineering projects.
引文
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[16]夏群,王蓉,李韬.基于电阻率综合测试的污染场地快速诊断方法研究[J].上海国土资源,2016,37(2):65-69,78.Xia Q,Wang R,Li T.Research on rapid diagnostic methods based on electrical resistivity comprehensive tests for contaminated sites[J].Shanghai Land&Resources,2016,37(2):65-69,78.
[17]许丽萍,解子军,李韬.典型污染场地地基土的测试成果与分析[J].上海国土资源,2012,33(4):52-55.Xu L P,Xie Z J,Li T.Testing of typical contaminated subsoil[J].Shanghai Land&Resources,2012,33(4):52-55.
[18]罗启仕.我国城市建设用地水土污染治理现状与问题分析[J].上海国土资源,2015,36(4):59-63.Luo Q S.Status of remediation of contaminated urban development land in China and analysis of existing problems[J].Shanghai Land&Resources,2015,36(4):59-63.
[2]张峰,崔潇,马烈,等.城市土地利用中的土壤污染问题及修复技术探讨[J].广州化工,2015(7):126-128.Zhang F,Cui X,Ma L,et al.Discussion on soil pollution problems and remediation technology in urban land use[J].Guangzhou Chemical,2015(7):126-128.
[3]宋刚练,牌卫卫,江建斌.应用于污染场地原位修复的旋喷工艺设计研究[J].探矿工程(岩土钻掘工程),2017,44(7):85-89.Song G L,Pai W W,Jiang J B.Design of rotary jet process for insitu remediation of contaminated sites[J]Exploration Engineering(Rock&Soil Drilling and Tunneling),2017,44(7):85-89.
[4]王凯光.水泥搅拌桩施工过程中的控制要点[J].山西建筑,2008,34(5):248-249.Wang K G.Key points in the construction of cement mixing piles[J].Shanxi Architecture,2008,34(5):248-249.
[5]韩东,赵雪,丁润华.高压旋喷桩施工工艺[J].建设管理,2014(4):80-81.Han D,Zhao X,Ding R H.High-pressure jet grouting pile c o n s t r u c t i o n t e c h n o l o g y[J].Construction Management,2014(4):80-81.
[6]唐小龙,吴俊峰,王文超,等.有机污染土壤原位化学氧化药剂投加方式的综述[J].化工环保,2015,35(4):376-380.Tang X L,Wu J F,Wang W C,et al.A review of the methods of in situ chemical oxidation of organic contaminated soils[J].Environmental Protection of Chemical Industry,2015,35(4):376-380.
[7]邵乐,刘晓月,史学锋,等.原位还原稳定化-高压旋喷注射技术修复铬污染场地中试研究[J].环境科学导刊,2018,37(4):54-57.Shao L,Liu X Y,Shi X F,et al.Pilot study on in situ reduction stabilization-high pressure rotary jet injection technology for repairing chromium contaminated sites[J].Environmental Science Survey,2018,37(4):54-57.
[8]高骏.岩土施工技术在污染场地治理中的应用研究[J].探矿工程(岩土钻掘工程),2016,43(3):75-79.Gao J.Application of geotechnical construction technology in treatment of contaminated sites[J].Exploration Engineering(Rock&Soil Drilling and Tunneling),2016,43(3):75-79.
[9]袁宝珺.水泥无侧限抗压强度试验[J].东北水利水电,2017(3):42-44.Yuan B J.Unconfined compressive strength test of cement[J].Water Resources&Hydropower of Northeast China,2017(3):42-44.
[10]陈亚男,陈洁芸,李振华,等.城市污水处理厂污泥中重金属海水浸出影响因素的研究[J].上海海洋大学学报,2016,25(2):223-228.Chen Y N,Chen J Y,Li Z H,et al.Understanding of the influences on the leaching ability of heavy metals from sewage sludge of municipal wastewater treatment plant in seawater[J].Journal of Shanghai Ocean University,2016,25(2):223-228.
[11]刘娥,刘兴国,王小冬,等.固定化藻菌净化水产养殖废水效果及固定化条件优选研究[J].上海海洋大学学报,2017,26(3):422-431.Liu E,Liu X G,Wang X D,et al.Study on efficiency of purifying the aquacultural waste water with immobilized alga-bacteria system and immobilization conditions optimization[J].Journal of Shanghai Ocean University,2017,26(3):422-431.
[12]李博炎,张饮江,彭群洲,等.土地利用/覆被变化对太湖贡湖湾水质影响的研究[J].上海海洋大学学报,2017,26(2):243-250.Li B Y,Zhang Y J,Peng Q Z,et al.Impacts of land use/cover on the water quality of Gonghu bay in Taihu lake[J].Journal of Shanghai Ocean University,2017,26(2):243-250.
[13]吕雪松,杨红.大金山岛生态承载力评价[J].上海海洋大学学报,2016,25(5):767-774.LüX S,Yang H.Assessment of the ecological carrying capacity of Dajinshan island[J].Journal of Shanghai Ocean University,2016,25(5):767-774.
[14]李韬.上海地区浅部水文地质条件对地下水污染物迁移的影响研究[J].上海国土资源,2018,39(2):78-83.Li T.Influence of shallow hydrogeological conditions on the migration of groundwater pollutants in Shanghai[J].Shanghai Land&Resources,2018,39(2):78-83.
[15]孙海波,谢辉,陈嘉,等.污染土地再开发中的环境风险与责任[J].上海国土资源,2017,38(1):79-82,86.Sun H B,Xie H,Chen J,et al.Environmental risk and liability of contaminate land redevelopment[J].Shanghai Land&Resources,2017,38(1):79-82,86.
[16]夏群,王蓉,李韬.基于电阻率综合测试的污染场地快速诊断方法研究[J].上海国土资源,2016,37(2):65-69,78.Xia Q,Wang R,Li T.Research on rapid diagnostic methods based on electrical resistivity comprehensive tests for contaminated sites[J].Shanghai Land&Resources,2016,37(2):65-69,78.
[17]许丽萍,解子军,李韬.典型污染场地地基土的测试成果与分析[J].上海国土资源,2012,33(4):52-55.Xu L P,Xie Z J,Li T.Testing of typical contaminated subsoil[J].Shanghai Land&Resources,2012,33(4):52-55.
[18]罗启仕.我国城市建设用地水土污染治理现状与问题分析[J].上海国土资源,2015,36(4):59-63.Luo Q S.Status of remediation of contaminated urban development land in China and analysis of existing problems[J].Shanghai Land&Resources,2015,36(4):59-63.