裂隙岩体注浆结石体收缩变形与抗剪强度
作者：
商海星;陆海军;李继祥;刘肖凡;宗正阳
期刊：
科学技术与工程 ,2016年16(36):231-235 ISSN：1671-1815
作者机构：
武汉轻工大学多孔介质力学研究所,武汉,430023;[李继祥; 宗正阳; 陆海军; 商海星; 刘肖凡] 武汉轻工大学
关键词：
注浆;结石体;裂隙;抗剪强度;收缩变形
摘要：
为了提高裂隙岩体的力学性能,保证工程的质量和安全,采用水玻璃-水泥混合注浆液对裂隙岩体进行加固。通过直剪试验、显微镜实时观测试验,研究注浆结石体的强度与变形特性,以此评价水玻璃-水泥混合液作为注浆材料的可行性。试验结果表明,水玻璃-水泥混合注浆液有效的提高了裂隙岩体的力学性能。水玻璃-水泥注浆溶液不但改变了裂隙岩体的微结构、裂隙率和岩体的物质组成成分,使岩体的致密度和强度增加;而且注浆溶液在岩体结构面中凝固后对结构面进行填充加固,有效的提高了注浆结石体的黏聚力c,增强了注浆结石体抵抗外力破坏的能力。裂隙率对注浆结石体的强度影响显著,随裂隙岩体裂隙率的增加,注浆结石体（裂隙岩体与注浆材料经过物理化学变化后形成的结合体）的抗剪强度减小;在裂隙率相差不大时,裂隙岩体的裂隙条数对注浆结石体的抗剪强度有重大影响,随着裂隙条数的增加,注浆结石体的抗剪强度减小。在注浆结石体抗剪强度减少过程中,注浆结石体的黏聚力c不断减小,内摩擦角φ基本保持不变。注浆结石体在第12 d时达到最佳抗剪强度,而水玻璃-水泥质量比为1.3∶1注浆液工程性能最为理想,期最佳抗剪强度为6.243 MPa。
语种：
中文
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垃圾填埋场污泥灰改性黏土衬垫的强度特性及微观结构
作者：
董祎挈;陆海军;李继祥;徐文颖
期刊：
岩土力学 ,2015年36(S1):187-192 ISSN：1000-7598
通讯作者：
Lu, Hai-Jun
作者机构：
[李继祥; 陆海军; 董祎挈; 徐文颖] Institute of Poromechanics, Wuhan Polytechnic University, Wuhan, 430023, China
通讯机构：
Institute of Poromechanics, Wuhan Polytechnic University, Wuhan, 430023, China
会议名称：
中国土木工程学会第十二届全国土力学及岩土工程学术大会
会议时间：
2015-01-01
会议地点：
中国上海
会议论文集名称：
中国土木工程学会第十二届全国土力学及岩土工程学术大会论文摘要集
关键词：
污泥灰(SSA);垃圾渗沥液;剪切变形;孔隙结构
摘要：
为评价污泥灰改性黏土作为填埋场衬垫防渗材料的可行性,分析污泥灰改性黏土强度特性及孔隙结构,针对受垃圾渗沥液腐蚀的纯黏土与污泥灰掺量为1%~5%的改性黏土,采用直接剪切试验分析其抗剪强度变化规律,采用低温氮气吸附试验分析剪切变形后试样的孔隙结构组成。结果表明,改性黏土属于Ⅵ型等温线,并存在H3型滞后环,且2~6 nm介孔的数量占比较大。受垃圾渗沥液腐蚀后,黏土抗剪强度大幅下降,黏聚力与内摩擦角分别下
语种：
中文
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The Leachate Release and Microstructure of the Sewage Sludge under the Anaerobic Fermentation
作者：
Dong, Yiqie;Lu, Haijun* ;Li, Jixiang;Wang, Changhong
期刊：
Journal of Chemistry ,2015年2015 ISSN：2090-9063
通讯作者：
Lu, Haijun
作者机构：
[Wang, Changhong; Lu, Haijun; Dong, Yiqie; Li, Jixiang] Wuhan Polytech Univ, Inst Porous Mech, Wuhan 430023, Peoples R China.
通讯机构：
[Lu, Haijun] W;Wuhan Polytech Univ, Inst Porous Mech, Wuhan 430023, Peoples R China.
摘要：
Pollutant release, pore structure, and thermal effect of sewage sludge during anaerobic fermentation were investigated. Results showed that the pH value firstly declined and then increased during anaerobic fermentation. The BODand organics of sewage sludge declined, and the BODof samples which was originally neutral declined as much as 53.6%. The micropore of samples was relatively developed. The biggest adsorption amount was 69.2 cm3/g. The average pore size was enlarged about 16.0-19.8% under anaerobic fermentation. There existed endothermic valley during heating procedure of 0-200°C because of the dehydration, and the mass loss was 60.9-72.5%. The endothermic valley of the sample fluctuated at the 14th day in the anaerobic fermentation. During the heating procedure of 200-600°C, there existed exothermal peaks because of the oxidation and burning of the organics. The curve of sample which was originally neutral had comparatively large endothermic valley and exothermal peak. © 2015 Yiqie Dong et al.
语种：
英文
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The Adsorption Capacity and Geotechnical Properties of Modified Clay Containing SSA Used as Landfill Liner-Soil Materials
作者：
Lu, Haijun* ;Dong, Yiqie;Li, Jixiang;Wang, Changhong
期刊：
Journal of Chemistry ,2015年2015:1-7 ISSN：2090-9063
通讯作者：
Lu, Haijun
作者机构：
[Lu, Haijun] Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China.;[Wang, Changhong; Lu, Haijun; Dong, Yiqie; Li, Jixiang] Wuhan Polytech Univ, Inst Poromech, Wuhan 430023, Peoples R China.
通讯机构：
[Lu, Haijun] C;Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China.
摘要：
The potential of clay containing 0 similar to 5% sewage sludge ash (SSA) is assessed for use as a landfill liner-soil material. Low temperature N-2 adsorption, batch adsorption, permeability, and unconfined compressive strength tests are performed to evaluate pore structure, adsorption capacity, hydraulic conductivity, and unconfined compressive strength of the clays. The pore size distribution of the modified clay containing SSA ismainly composed of micropores (< 2 nm) andmesopores (2 similar to 7 nm). With the increasing of SSA from 0% to 5%, the adsorption capacity of Zn(II) and Cu(II) to the clay increases 37% and 273%, respectively. The hydraulic conductivity of modified clay is from 3.62 x 10(-8) to 2.17 x 10(-8) cm/s. At SSA = 3%, the unconfined compressive strength of the clay reaches the maximum value of 601.1 kPa. After the clay containing SSA is contaminated by acid and alkali chemical solutions, the amount of mesopores and hydraulic conductivity increase. The adsorption capacity and unconfined compressive strength of contaminated clay decrease about 2 similar to 44% and 25.7 similar to 38.2%, respectively. The modified clay containing SSA can meet the adsorption and geotechnical requirement of landfill liners.
语种：
英文
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垃圾渗沥液腐蚀下污泥灰改性黏土压缩特性及孔隙结构
作者：
董祎挈;陆海军;李继祥
期刊：
中国环境科学 ,2015年35(7):2072-2078 ISSN：1000-6923
通讯作者：
Lu, Hai-Jun
作者机构：
[陆海军; 李继祥; 董祎挈] Institute of Poromechanics, Wuhan Polytechnic University, Wuhan, China
通讯机构：
Institute of Poromechanics, Wuhan Polytechnic University, Wuhan, China
关键词：
污泥灰;垃圾渗沥液;固结压缩;孔隙结构;颗粒组成
摘要：
采用市政污泥为原材料烧制污泥灰,并将污泥灰作为改良添加剂对传统填埋场压实黏土衬垫系统进行改性,以达到实现污泥资源化利用以及减少黏土作为衬垫防渗材料的用量.为评价污泥灰改性黏土作为填埋场衬垫材料的工程特性以及微观结构,通过固结压缩试验、低温氮气吸附试验、颗粒分析试验分别检测改性黏土的压缩特性、微观孔隙结构、颗粒组成.压缩试验结果表明,受垃圾渗沥液腐蚀后的改性黏土,随污泥灰含量的增加,孔隙比增大、压缩量减小;经垃圾渗沥液腐蚀后,改性黏土的压缩系数(α1-2)为0.310~0.391 MPa~(-1),固结系数(Cv)为2.446~2.768cm~2/s.低温氮气吸附试验结果表明,改性黏土的吸附-脱附等温线属于Ⅴ型等温线;对于垃圾渗沥液腐蚀的改性黏土,孔径分布呈双肩峰形式,孔径为3~7nm的孔隙占比较大,累计孔容为0.509~0.530cm~3/g.颗粒分析试验结果显示,受渗沥液腐蚀后改性黏土颗粒组成差异性明显,粒径>11.5 μm的颗粒为35.09%~49.42%;粒径为2.3~1.5 μm的颗粒为2.35%~7.28%;粒径<2.3 μm的颗粒为46.57%~57.63%.污泥灰改性黏土具有较好的抗垃圾渗滤液腐蚀效果,可将其作为填埋场衬垫材料使用.
语种：
中文
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水流作用下填埋场开裂黏土衬垫数值仿真计算
作者：
董祎挈;陆海军;戴睿;何丽
期刊：
武汉轻工大学学报 ,2015年(2):92-97 ISSN：2095-7386
作者机构：
武汉轻工大学多孔介质力学研究所,湖北武汉,430023;江汉大学文理学院机电与建筑工程学部,湖北武汉,430056;[何丽] 江汉大学文理学院;[戴睿; 董祎挈; 陆海军] 武汉轻工大学
关键词：
数值仿真;压实黏土;干燥开裂
摘要：
针对垃圾填埋场压实黏土封场系统在干旱与半干旱地区出现的干燥开裂的问题,基于流体动力学流动方程,建立了多孔介质不连续裂缝中水流流动数学模型,采用COMSOL模拟开裂黏土水渗流规律。数值模拟计算结果表明,流体的压强所出现的最大值和最小值分别出现在入口和出口的边缘处,流体在裂缝中流速较大的区域主要分布在水流的入口和出口处的边缘,越靠近裂缝的两端,裂缝中的流体的运动状态与基质中的流动状态差异性越大。
语种：
中文
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Cracking and water seepage of Xiashu loess used as landfill cover under wetting–drying cycles
作者：
Lu, Haijun;Li, Jixiang* ;Wang, Weiwei;Wang, Changhong
期刊：
Environmental Earth Sciences ,2015年74(11):7441-7450 ISSN：1866-6280
通讯作者：
Li, Jixiang
作者机构：
[Wang, Changhong; Lu, Haijun; Wang, Weiwei; Li, Jixiang] Wuhan Polytech Univ, Inst Poromech, Wuhan 430023, Peoples R China.
通讯机构：
[Li, Jixiang] W;Wuhan Polytech Univ, Inst Poromech, Wuhan 430023, Peoples R China.
关键词：
Landfill cover;Cracks;Pores;Hydraulic conductivity;Water seepage
摘要：
This paper intends to investigate the anti-seepage characteristics of Xiashu loess used as landfill cover under wetting–drying cycles. A series of tests were performed to systematically evaluate the surface cracks, pores, the hydraulic conductivity and water seepage of the soil under wetting–drying cycles. The cracking tests indicated that the cracking intensity factor (CIF) increased with the number of wetting–drying cycles. After three wetting–drying cycles, the CIF gradually reached a stable value. The influence of the compactness of the compacted clay was significant to cracking. After four drying–wetting cycles, the CIF of compacted clay with relatively low compactness (ρ=1.65g/cm3, W5=25%) was 0.15, and the CIF of compacted clay with higher compactness (ρ=1.65g/cm3, W3=21%) was only 0.06. With the increase in the number of wetting–drying cycles, the accumulated pore volume of the soil particles increased and the maximum pore size was nearly unchanged. After four drying–wetting cycles, the proportion and average diameter of macro-pore in the soil particles were both increased. However, the proportion and average diameter of the meso-pore slightly decreased. Furthermore, the proportion and average diameter of the micro-pores were unchanged. After four wetting–drying cycles, the hydraulic conductivity of the compacted soil was at 8.3×10−7–1.5×10−5cm/s, which was increased about three orders of magnitude compared with the compacted soil without cracks. The hydraulic conductivity of compacted soil increased linearly as cracks increased. The hydraulic conductivity of compacted soil also gradually increased to a stable value as the pore volume increased. After 1 month of wetting–drying cycles, the cracks of soil with low compactness had extended to a depth of 15cm below the soil surface while the cracks of soil with higher compactness only reached a depth of 5cm. © 2015, Springer-Verlag Berlin Heidelberg.
语种：
英文
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水泥固封镉污染土离子释放规律与微观结构
作者：
董祎挈;陆海军;李继祥
期刊：
环境工程学报 ,2015年9(9):4578-4584 ISSN：1673-9108
通讯作者：
Lu, H.
作者机构：
[董祎挈; Lu H.; 陆海军] Institute of Poromechanics, Wuhan Polytechnic University, Wuhan, 430023, China
通讯机构：
[Lu, H.] I;Institute of Poromechanics, Wuhan Polytechnic University, Wuhan, China
关键词：
固化;镉污染黏土;污染物释放;孔隙结构;热效应
摘要：
为了评价2%、5%、10%水泥固封镉污染土的处理效果,采用污染物释放实验、低温氮气吸附实验、热重-差热分析实验,检测水泥固封体的Cd~(2 +)浸出浓度、孔隙结构、物质组成与相变规律。未经水泥固封处理的镉污染土,其浸出液中Cd~(2 +)浓度高达9.72 mg /L;当水泥掺量> 5%后,水泥固封体的Cd~(2 +)浸出浓度低于国家标准1 mg /L,说明经水泥固封处理后的镉污染土对污染物的释放具有较好的密封效果。水泥固封镉污染土吸附脱附等温线属于IV型, 且存在H_3型滞回环。随着水泥掺量的增加,孔径为8 ~ 12 nm的孔隙数量增多;总孔容表现出先减少后增大的趋势,且水泥含量为10% 时,总孔容达到最大值,其值为0.151 cm3 /g。未经水泥固封处理的镉污染土,温度达到1 000℃时,质量损失为12.82%,且存在一个吸热谷;而经水泥固封处理后,水泥固封体的质量损失达到18.6% ~ 31.3%,且在200 ~ 450℃之间存在明显放热峰。
语种：
中文
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市政污泥厌氧发酵渗沥液污染物释放与热效应
作者：
董祎挈;陆海军;张芊;刘肖云
期刊：
环境工程 ,2015年33(6):49-53 ISSN：1000-8942
作者机构：
武汉轻工大学多孔介质力学研究所;[刘肖云] 武汉市黄陂建筑集团有限公司;[张芊; 董祎挈; 陆海军] 武汉轻工大学
关键词：
污泥;厌氧发酵;污染指标
摘要：
为了研究污泥厌氧发酵过程中渗沥液水质污染指标随温度和时间的变化规律,以及污泥的热效应变化,分别测定30,45,60℃下厌氧发酵不同时间后污泥渗沥液的p H值、DO、TN和TOC含量,分析厌氧发酵对渗沥液污染指标的影响,通过热重-差热试验绘制45℃下不同时间的TG-DTA曲线,研究厌氧发酵对污泥热效应的影响。结果表明:新鲜污泥渗沥液p H值为7.50,随着厌氧发酵的进行,30℃下p H值上升25.7%,DO、TN与TOC含量分别下降90.0%、90.4%、74.9%,且初期外界温度越高反应速率越快;由TG-DTA曲线可知:水分散失和有机物燃烧分解致使质量损失,并分别伴随吸热和放热现象。
语种：
中文
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Heat Transport and Water Permeability during Cracking of the Landfill Compacted Clay Cover
作者：
Lu, Haijun;Liu, Jianjun* ;Li, Yuan;Dong, Yiqie
期刊：
Journal of Chemistry ,2015年2015 ISSN：2090-9063
通讯作者：
Liu, Jianjun
作者机构：
[Liu, Jianjun; Lu, Haijun; Dong, Yiqie] Wuhan Polytech Univ, Inst Poromech, Wuhan 430023, Peoples R China.;[Li, Yuan; Liu, Jianjun] Southwest Petr Univ, Sch Geosci & Technol, Chengdu 610500, Peoples R China.
通讯机构：
[Liu, Jianjun] W;Wuhan Polytech Univ, Inst Poromech, Wuhan 430023, Peoples R China.
摘要：
The heat-moisture transport through the compacted clay was observed in laboratory. The hydraulic conductivity of cracked clay under wetting-drying cycles was also investigated. At the early phase of heating, the temperature of soil columns rose fast and moisture decreased dramatically; after this phase, the temperature rose at a lower speed and moisture loss stabilized gradually. The moisture content of compacted clay at 25 cm depth decayed to 0. The crack intensity factor (CIF) of compacted clay was 0.043 and 0.097; the crack depth was about 6.5 cm and 8.2 cm at 50 degrees C and 60 degrees C, respectively. The hydraulic conductivity of compacted clay was within 8.3 x 10(-7) to 1.5 x 10(-5) cm/s after four wetting-drying cycles. This value was 2 similar to 3 orders of magnitude higher than that of uncracked clay.
语种：
英文
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污泥灰改性黏土胀缩与开裂变形特性
作者：
董祎挈;陆海军
期刊：
大连理工大学学报 ,2015年55(3):312-318 ISSN：1000-8608
通讯作者：
Lu, H.-J.
作者机构：
[董祎挈] Institute of Poromechanics, Wuhan Polytechnic University, Wuhan, 430023, China;Institute of Geotechnical Engineering, Dalian University of Technology, Dalian, 116024, China;[陆海军] Institute of Poromechanics, Wuhan Polytechnic University, Wuhan, 430023, China, Institute of Geotechnical Engineering, Dalian University of Technology, Dalian, 116024, China
通讯机构：
[Lu, H.-J.] I;Institute of Poromechanics, Wuhan Polytechnic University, Wuhan, China
关键词：
污泥灰;改性黏土;膨胀收缩;开裂因子
摘要：
针对垃圾填埋场衬垫系统受污染物侵蚀破坏现状及污水处理厂剩余污泥回收处理利用工程评价问题,分析污泥灰改性黏土在酸碱化学溶液作用下胀缩与开裂特性,室内模拟酸碱化学溶液污染工况,将纯黏土与污泥灰掺量为1%~5%的改性黏土受pH=5、6、8、9的酸碱化学溶液污染,通过界限含水率试验测定改性黏土的液限与塑限,分析试样的稠度界限;通过膨胀与收缩试验测定改性黏土的膨胀率与收缩率,分析试样的胀缩特性;通过开裂试验测定改性黏土的开裂特性.结果表明:改性黏土液限约为43.5%,而随着污泥灰掺量增大,塑限升高,塑性指数降低,经酸碱化学溶液污染后污泥灰掺量5%的试样液、塑限达到最大,为45.9%、22.8%;污泥灰掺量为5%时膨胀率最低,为5.66%,掺量为3%时,线收缩率最低,为2.14%;受酸碱化学溶液污染后改性黏土膨胀率降低12.7%~36.5%,而线收缩率升高33.8%~75.7%;4次干湿循环后,纯黏土试样的开裂因子较第一次干湿循环末期大80.71%,而污泥灰掺量为3%试样开裂因子仅较第一次干湿循环末期大43.47%.故建议采用3%污泥灰掺量的改性黏土作为填埋场衬垫材料.
语种：
中文
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秸秆纤维黏土混合料作为填埋场衬垫材料可行性研究
作者：
陆海军;陈威;董祎挈
期刊：
大连理工大学学报 ,2014年54(3):323-328 ISSN：1000-8608
通讯作者：
Lu, H.-J.
作者机构：
[陆海军; 陈威; 董祎挈] Institute of Poromechanics, Wuhan Polytechnic University, Wuhan 430023, China
通讯机构：
[Lu, H.-J.] I;Institute of Poromechanics, Wuhan Polytechnic University, Wuhan 430023, China
关键词：
填埋场衬垫;秸秆纤维;改良黏土;承载能力;开裂因子
摘要：
为保证填埋场衬垫防渗系统的安全性，采用秸秆纤维对压实黏土衬垫系统进行改良，以提高衬垫系统的承载能力及抗开裂特性.通过无侧限抗压强度试验、直剪试验、固结试验与抗开裂试验，探讨了秸秆纤维改良黏土的强度特性、变形特性和抗开裂特性，并以此对秸秆纤维黏土混合料作为填埋场衬垫材料的可行性进行评价.试验结果表明，秸秆纤维改良黏土具有较高的承载能力与抗开裂能力，秸秆纤维黏土混合料可以作为填埋场衬垫材料.秸秆纤维掺量对改良黏土的强度特性影响显著，随纤维掺量的增加，改良黏土的无侧限抗压强度先增大后减小，破裂形态由脆性破坏逐渐过渡为塑性破坏;黏聚力c、内摩擦角φ、压缩模量E_s先增大后减小;压缩系数α_v、压缩指数C_c则出现先减小后增大的趋势.最佳秸秆纤维掺量为0.30%，此时改良黏土的最大抗压强度达到459.15 kPa，满足填埋场衬垫的工程强度要求.秸秆纤维掺量为0.30%的改良黏土，其开裂因子仅为0.008 1.
语种：
中文
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基于骨架构建污泥固化体收缩与开裂特性的研究
作者：
陈威;陆海军;黄发兴
期刊：
武汉轻工大学学报 ,2014年(2):77-81 ISSN：2095-7386
作者机构：
武汉轻工大学多孔介质力学研究所,湖北武汉,430023;[陈威; 黄发兴; 陆海军] 武汉轻工大学
关键词：
污泥固化;骨架构建;收缩开裂
摘要：
针对传统污泥固化方法中固化污泥体易收缩开裂等问题，基于骨架构造原理，用煤矸石作为骨料，加入水泥、生石灰、粉煤灰等固化材料，按照不同配比对污泥进行一系列的固化实验。考察了在28 d养护龄期污泥固化结实体的开裂与收缩特性。研究表明加入煤矸石作为骨料能有效地抑制固化污泥的收缩与开裂，生石灰能抑制开裂，粉煤灰对污泥固化体的收缩开裂特性影响较小。
语种：
中文
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Experiment study on the atterberg limits of clay contaminated by oil
作者：
Huang, Fa-Xing;Lu, Hai-Jun
期刊：
Electronic Journal of Geotechnical Engineering ,2014年19(M):3037-3046 ISSN：1089-3032
通讯作者：
Lu, H.-J.(luhaijun111@163.com)
作者机构：
[Huang, Fa-Xing; Lu, Hai-Jun] Institute of Porous Mechanics, Wuhan Polytechnic University, Wuhan, 430023, China
通讯机构：
Institute of Porous Mechanics, Wuhan Polytechnic University, China
关键词：
Atterberg limits;Oil-contaminated soil;Viscosity
摘要：
For the evaluation of the restoration and reuse of the oil-contaminated soil, the experimental study of Atterberg limits of soil contaminated by oil were carried out and explored the law of Atterberg limits under the condition of oil polluted.The study showed that oil palyed a significant role in changing the value of Atterberg limits of oil-contaminated soil, the oil rate of 3% was the boundary, the influence of oil on the Atterberg limits of soil could be ignorance when the oil rate was less than 3%, but when the oil rate was higher than 3%, the liquid limit of the soil contaminated by crude oil increased while the plastic limit reduced, but the reduction of plastic limit was low, thus plastic index increased by 31.8% when the oil rate was 12%.The liquid limit and the plastic limit of soil contaminated by diesel oil were both reduced while plastic index increased, liquid limit and plastic limit were 73% and 46.6% respectively compared with the soil that haven't been polluted.Due to the non-polar, low dielectric constant and adsorption of oil itself, in addition, the difference of viscosity, causing the difference of Atterberg limits under the condition of different shape of oil and oil rate. This research will provide a theoretical basis for the prevention, treatment and optimizing process of oil-contaminated soil, and also has significant practical and application value in the assessment or control of oil-contaminated sites. ©2014 ejge.
语种：
英文
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基于Fenton 法污泥有机质降解及微观结构变化规律
作者：
陈威;陆海军;黄发兴
期刊：
环境工程 ,2014年32(10):41-45 ISSN：1000-8942
作者机构：
[陈威; 陆海军; 黄发兴] 武汉轻工大学多孔介质力学研究所
关键词：
Fenton试剂;污泥;有机质;微观结构
摘要：
针对污泥中有机质含量高且难降解,采用Fenton氧化法对污泥进行处理以达到降解污泥有机质的目的。研究了不同pH值条件下,加入不同配比的Fenton试剂对剩余污泥中有机质降解效果的影响,并通过孔隙结构试验与差热分析试验探讨有机质降解后的污泥微观结构变化。结果表明:Fenton试剂能将污泥中的有机质从30%降解至21%,处理后的污泥比表面积增大、孔容增大、孔径减小,污泥中的水分与有机质组成发生了改变。
语种：
中文
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The geotechnical engineering properties of clay containing straw fiber under acid-base chemical solution corrosion
作者：
Hai-jun, Lu;Ji-Xiang, Li;Wei, Chen;Yi-Qie, Dong
期刊：
Electronic Journal of Geotechnical Engineering ,2014年19(I):2103-2111 ISSN：1089-3032
通讯作者：
Lu, Hai-Jun(lhj_whpu@163.com)
作者机构：
[Yi-Qie, Dong; Hai-jun, Lu; Wei, Chen; Ji-Xiang, Li] Institute of Porous Mechanics, Wuhan Polytechnic University, Wuhan, 430023, China
关键词：
Compressive strength;Hydraulic conductivity;Improved clay;Straw fiber;Void ratio
摘要：
In order to investigate the geotechnical engineering properties of the compacted clay containing straw fiber under acid-base chemical solution corrosion, a series of swelling and shrinkage, unconfined compression, permeability, direct shear and consolidation tests were performed in laboratory. Volumetric swelling and shrinkage ratio of clay containing 0.3% straw fiber decreased with increasing of acid-base chemical solution concentration, and the influence of acidic condition was more significant than alkaline condition. After acid-base chemical solution corrosion, the maximum compressive strength of improved clay were 353.37kPa˜459.15kPa. The compressive strength of all soil specimens met the engineering requirement of 200kPa. The results from permeability tests showed that the hydraulic conductivity of clay containing fiber increased with an increase of acid-base chemical solution concentration. All soil specimens had a hydraulic conductivity less than 1×10<sup>-7</sup>cm/s. The hydraulic conductivity of the improved clay fell within the narrow range of 5×10<sup>-8</sup>cm/s ˜7×10<sup>-8</sup>cm/s. The shear strength of improved clay declined under acid-base chemical solution corrosion. However, the void ratio of soil samples increased after chemical solution corrosion. ©2014 ejge.
语种：
英文
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铅污染黏土微观结构与变形强度特性
作者：
陆海军;廖朱玮;汪琪;赵颖;陈威
期刊：
岩石力学与工程学报 ,2014年33(A02):4252-4257 ISSN：1000-6915
通讯作者：
Lu, Haijun
作者机构：
武汉轻工大学多孔介质力学研究所,湖北武汉,430023;中国科学院武汉岩土力学研究所,湖北武汉,430071;[赵颖] 赵颖;[廖朱玮] 廖朱玮;[陆海军] 陆海军
通讯机构：
Institute of Porous Mechanics, Wuhan Polytechnic University, Wuhan, Hubei, China
关键词：
土力学;污染黏土;微观结构;抗压强度;压缩模量
摘要：
为研究铅污染物对黏土微观结构演化和变形特性规律的影响,通过SEM表面微观形貌试验、低温氮吸附试验,研究铅污染黏土的表面微观形貌与孔隙结构特征,微观结构试验结果表明:未受铅污染的原状土颗粒孔隙较少,颗粒以叠片状排列为主;铅污染黏土孔隙发育明显,主要以10 nm左右的中孔为主;随污染物浓度增大,污染黏土的孔径增大,二次孔增多,土颗粒以点-点排列为主;通过开展无侧限抗压强度试验、直剪试验和固结试验,观察铅污染黏土的强度与变形特性,铅污染物对黏土无侧限抗压强度影响显著,随铅污染物浓度的增大,铅污染黏土无侧限抗压强度明显减小.随铅污染物浓度增大,污染黏土抗剪强度减弱,黏聚力c和内摩察角φ减小.在铅污染物化学溶液的腐蚀作用下,黏土孔隙比e变大,随铅污染物浓度增大,压缩系数α和压缩指数Cc增大,压缩模量Es减小.
语种：
中文
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The strength and hydraulic properties of landfill improved clay liner
作者：
Chen, Wei;Lu, Hai-Jun;Li, Ji-Xiang;Dai, Rui;Wang, Geng-Wu
期刊：
Electronic Journal of Geotechnical Engineering ,2014年19(Q):4237-4246 ISSN：1089-3032
通讯作者：
Lu, Hai-Jun(lhj_whpu@163.com)
作者机构：
[Li, Ji-Xiang; Dai, Rui; Wang, Geng-Wu; Lu, Hai-Jun; Chen, Wei] Institute of Porous Mechanics, Wuhan Polytechnic University, Wuhan, China
通讯机构：
Institute of Porous Mechanics, Wuhan Polytechnic University, China
关键词：
Hydraulic conductivity;Improved clay;Landfill;Liner system
摘要：
The potential of the improved clay containing 3 or 6% granular activated carbon (GAC) or 3 or 6% acid-activated bentonite or 5 or 10% lime was assessed for use as a landfill liner-soil material. A series of tests were conducted, swelling and shrinkage, unconfined compression, permeability, to evaluate the seepage and strength properties of the soils. For clay containing 3 or 6% GAC or 3 or 6% activated bentonite, the minimum volumetric swelling ratio were 11%~16%, and the minimum volumetric shrinkage ratio were >4%;the hydraulic conductivity were <1×10<sup>-7</sup>cm/s at a certain range of water content;the maximum unconfined compression were >200kPa. For clay containing 10% lime, the minimum volumetric swelling ratio was 0.45%, and the volumetric shrinkage ratio were <4%;the hydraulic conductivity were >1×10-7cm/s;the maximum unconfined compression was 609.3kPa. A new landfill liner system composed of two-layer soils was proposed. The upper soil layer composed of raw clay plus lime contributes significant to bearing capacity of liners, and the lower soil layer containing GAC or acid-activated bentonite contributes to anti-seepage capacity of liners. The two-layer liner system can met the anti-seepage requirement of 1×10<sup>-7</sup>cm/s;it increased bearing capacity of landfill liners.The potential of the improved clay containing 3 or 6% granular activated carbon (GAC) or 3 or 6% acid-activated bentonite or 5 or 10% lime was assessed for use as a landfill liner-soil material. A series of tests were conducted, swelling and shrinkage, unconfined compression, permeability, to evaluate the seepage and strength properties of the soils. For clay containing 3 or 6% GAC or 3 or 6% activated bentonite, the minimum volumetric swelling ratio were 11%~16%, and the minimum volumetric shrinkage ratio were >4%;the hydraulic conductivity were <1×10-7cm/s at a certain range of water content;the maximum unconfined compression were >200kPa. For clay containing 10% lime, the minimum volumetric swelling ratio was 0.45%, and the volumetric shrinkage ratio were <4%;the hydraulic conductivity were >1×10-7cm/s;the maximum unconfined compression was 609.3kPa. A new landfill liner system composed of two-layer soils was proposed. The upper soil layer composed of raw clay plus lime contributes significant to bearing capacity of liners, and the lower soil layer containing GAC or acid-activated bentonite contributes to anti-seepage capacity of liners. The two-layer liner system can met the anti-seepage requirement of 1×10-7cm/s;it increased bearing capacity of landfill liners. ©2014 ejge.
语种：
英文
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垃圾渗沥液污染黏土强度与变形特性研究
作者：
张芊;陆海军;刘辉凯;冯露
作者机构：
武汉轻工大学土木工程与建筑学院 武汉 430023
会议名称：
第五届湖北省土木工程专业大学生科技创新论坛
会议时间：
2014-06-08
会议地点：
武汉
会议论文集名称：
第五届湖北省土木工程专业大学生科技创新论坛论文集
关键词：
压实黏土;抗压强度;变形特性;垃圾渗沥液
摘要：
本文为了保证垃圾填埋场衬垫防渗系统的安全运行,研究了垃圾渗沥液污染黏土的强度与变形特性.室内模拟垃圾渗沥液与压实黏土衬垫系统的接触反应,通过无侧限抗压强度试验、直剪试验、固结试验与表面微观形貌(SEM)试验观察垃圾渗沥液污染黏土的变形特性,以此探究垃圾渗沥液污染黏土强度与变形规律.试验结果表明,垃圾渗沥液污染黏土的抗压能力与原状土相比明显减弱,黏土颗粒间的抗剪强度水平、土壤粘聚力相应减弱,内摩擦角减小,改变了土壤的密实度,导致土壤压缩性降低.
语种：
中文
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Experimental research of the influence factors on the permeability of oil-polluted clay
作者：
Huang, Fa-xing;Lu, Hai-jun
期刊：
Electronic Journal of Geotechnical Engineering ,2014年19(K):2597-2605 ISSN：1089-3032
作者机构：
[Huang, Fa-xing; Lu, Hai-jun] Institute of Porous Mechanics, Wuhan Polytechnic University, Wuhan, 430023, China
关键词：
Dry density;Oil rate;Oil-contaminated solid;Permeability;Viscosity
摘要：
For the permeability problem of oil-contaminated soil in its administration of repair and reuse process, the permeability experiments of oil-contaminated compacted clay were carried out systematically. The oil content, dry density and viscosity of fluid on the permeability of compacted clay were discussed. The results showed that the permeability coefficient of clay decreased rapidly due to the increase of oil rate for both diesel and crude oil-contaminated clay, most of the pores were clogged by the oil when the oil rate is greater than 6%, and the oil will leak during the process of sample preparation, making the permeability coefficient stable at the same time. The permeability coefficient decreased exponentially due to the increase of dry density, the permeability coefficient of two kinds of oil-contaminated tend to be equal when the dry density is greater than 1.53 g/cm<sup>3</sup>. The viscosity of fluid meets the order: distilled water>diesel oil>crude oil, making the permeability coefficient of crude oil-contaminated clay decrease obviously under the condition of the same oil rate and dry density. This research will provide a theoretical basis for the prevention, treatment and optimizing process of oil-contaminated soil, and also has significant practical and application value in the assessment or control of oil-contaminated sites. ©2014 ejge.
语种：
英文
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