«上一篇/Previous Article|本期目录/Table of Contents|下一篇/Next Article»

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

38卷

期数:

2021年02期

页码:

99-107

栏目:

出版日期:

2021-03-25

文章信息/Info

Title:

Resistivity Characteristics Test and Effect Evaluation of Alkali Solution Strengthening Loess

文章编号:

1673-2049(2021)02-0099-09

作者:

刘 华^1,2,胡文乐¹,王铁行^1,2,王松鹤³,刘乃飞^1,2,胡鹏飞¹,谷宏全¹

1. 西安建筑科技大学 土木工程学院,陕西 西安 710055; 2. 西安建筑科技大学 陕西省岩土与地下空间工程 重点实验室,陕西 西安 710055; 3. 西安理工大学 土木建筑工程学院,陕西 西安 710048

Author(s):

LIU Hua^1,2, HU Wen-le¹, WANG Tie-hang^1,2, WANG Song-he³, LIU Nai-fei^1,2, HU Peng-fei¹, GU Hong-quan¹

1. School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, Shaanxi, China; 2. Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, Sh

关键词:

黄土;  碱液加固;  电阻率特征;  抗剪强度

Keywords:

loess;  alkali solution strengthening;  resistivity characteristic;  shear strength

分类号:

TU411

DOI:

10.19815/j.jace.2020.09080

文献标志码:

A

摘要:

为建立快速无损的评价碱液处理黄土场地体系,探寻电测无损检测结果与场地工程力学特性之间的联系,在室内开展了不同浓度碱液处理原状黄土试样的电阻率测试及直剪试验,得到了碱液处理后黄土试样的剪应力-应变曲线变化趋势; 进一步分析碱液处理黄土场地的抗剪强度特性和电阻率特征,得到了指标间的定量联系,并以碱液浓度为关键变量对抗剪强度指标与电阻率、液限、塑限等物理力学参数进行关联分析。基于硬化型曲线的数学模型,给出了考虑碱液处理浓度和电阻率影响的剪应力-剪应变预测关系。最终根据抗剪强度、最大干密度、塑性指数等工程力学参数的变化情况,提出了基于电阻率变化的碱液处理黄土工程力学性能变化的量化评价。结果表明:随着碱液浓度的增加,液限、塑限均出现增大的趋势,最大干密度随着碱液浓度的增加而减小; 处理后的黄土试样剪应力-剪应变曲线呈现硬化型曲线的特征,且随着碱液浓度的增大,抗剪强度逐渐增加,电阻率值逐渐减小。

Abstract:

In order to establish a rapid and non-destructive evaluation system of alkali treated loess site and explore the relationship between the results of electrical non-destructive testing and the engineering mechanical properties of the site, the resistivity test and direct shear test of undisturbed loess samples treated with different concentrations of alkali solution were carried out in laboratory, and the shear stress-strain curve change trend of loess samples treated with alkali solution was obtained. The shear strength and resistivity characteristics of alkali treated loess site were further analyzed, and the quantitative relationship between the indexes was obtained, and the correlation analysis between the shear strength index and the physical and mechanical parameters such as resistivity, liquid limit and plastic limit was carried out with the alkali concentration as the key variable. At the same time, based on the mathematical model of hardening curve, the relationship between shear stress and shear strain considering the effect of alkali treatment concentration and resistivity was given. Finally, according to the change of engineering mechanical parameters such as shear strength, maximum dry density and plasticity index, the quantitative evaluation of engineering mechanical properties of alkali treated loess based on the change of resistivity was proposed. The results show that the liquid limit and plastic limit increase with the increase of alkali concentration, and the maximum dry density decreases with the increase of alkali concentration. The shear stress-strain curves of the treated loess samples show the characteristics of hardening curve. With the increase of alkali concentration, the shear strength increases and the resistivity decreases.

参考文献/References:

[1] 李 宁,程国栋,谢定义.西部大开发中的岩土力学问题[J].岩土工程学报,2001,23(3):268-272.
LI Ning,CHENG Guo-dong,XIE Ding-yi.Geomechanics Development in Civil Construction in Western China[J].Chinese Journal of Geotechnical Engineering,2001,23(3):268-272.
[2]徐张建,林在贯,张茂省.中国黄土与黄土滑坡[J].岩石力学与工程学报,2007,26(7):1297-1312.
XU Zhang-jian,LIN Zai-guan,ZHANG Mao-sheng.Loess in China and Loess Landslides[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(7):1297-1312.
[3]高国瑞.中国黄土的微结构[J].科学通报,1980,25(20):945-948.
GAO Guo-rui.Microstructure of Chinese Loess[J].Chinese Science Bulletin,1980,25(20):945-948.
[4]许 领,戴福初,邝国麟,等.黄土滑坡典型工程地质问题分析[J].岩土工程学报,2009,31(2):287-293.
XU Ling,DAI Fu-chu,KWONG A K L,et al.Analysis of Some Special Engineering-geological Problems of Loess Landslide[J].Chinese Journal of Geotechnical Engineering,2009,31(2):287-293.
[5]刘松玉.污染场地测试评价与处理技术[J].岩土工程学报,2018,40(1):1-37.
LIU Song-yu.Geotechnical Investigation and Remediation for Industrial Contaminated Sites[J].Chinese Journal of Geotechnical Engineering,2018,40(1):1-37.
[6]HO Y A,PUFAHL D E.The Effects of Brine Contamination on the Properties of Fine Grained Soils[J].High Energy Chemistry,2015,42(1):18-22.
[7]CECS 68:94,氢氧化钠溶液(碱液)加固湿陷性黄土地基技术规程[S].
CECS 68:94,Technical Regulation on Sodium Hydroxide Solution Grouting for Strengthening Collapsible Loess Foundation[S].
[8]李云章.湿陷性黄土地基碱液加固[J].建筑结构学报,1982,3(1):69-80.
LI Yun-zhang.Stabilization of Collapsible Loess Subsoil by Alkaline Solution[J].Journal of Building Structures,1982,3(1):69-80.
[9]RAJUPT V S,HIGGINS A J,SINGLEY M E.Cleaning of Excavated Soil Contaminated with Hazardous Organic Compounds by Washing[J].Water Environment Research,1994,66(6):819-827.
[10]KERMANI M,EBADI T.The Effect of Oil Contamination on the Geotechnical Properties of Fine-grained Soils[J].Journal of Soil Contamination,2012,21(5):655-671.
[11]YOON G L,PARK J B.Sensitivity of Leachate and Fine Contents on Electrical Resistivity Variations of Sandy Soils[J].Journal of Hazardous Materials,2001,84(2/3):147-161.
[12]CHOO H,SONG J,LEE W,et al.Effect of Clay Fraction and Pore Water Conductivity on Electrical Conductivity of Sand-kaolinite Mixed Soils[J].Journal of Petroleum Science and Engineering,2016,147:735-745.
[13]CHU Y,LIU S,WANG F,et al.Estimation of Heavy Metal-contaminated Soils' Mechanical Characteristics Using Electrical Resistivity[J].Environmental Science & Pollution Research,2017,24(15):13561-13575.
[14]CHU Y,LIU S,WANG F,et al.Electric Conductance Response on Engineering Properties of Heavy Metal Polluted Soils[J].Journal of Environmental Chemical Engineering,2018,6(4):5552-5560.
[15]查甫生,刘松玉,杜延军,等.非饱和黏性土的电阻率特性及其试验研究[J].岩土力学,2007,28(8):1671-1676.
ZHA Fu-sheng,LIU Song-yu,DU Yan-jun,et al.The Electrical Resistivity Characteristics of Unsaturated Clayey Soil[J].Rock and Soil Mechanics,2007,28(8):150-155.
[16]刘松玉,边汉亮,蔡国军,等.油水二相体对油污染土电阻率特性的影响[J].岩土工程学报,2017,39(1):170-177.
LIU Song-yu,BIAN Han-liang,CAI Guo-jun,et al.Influences of Water and Oil Two-phase on Electrical Resistivity of Oil-contaminated Soils[J].Chinese Journal of Geotechnical Engineering,2017,39(1):170-177.
[17]CHU Y,LIU S,BATE B,et al.Evaluation on Expansive Performance of the Expansive Soil Using Electrical Responses[J].Journal of Applied Geophysics,2018,148:265-271.
[18]CAI G,CHU Y,LIU S,et al.Evaluation of Subsurface Spatial Variability in Site Characterization Based on RCPTU Data[J].Bulletin of Engineering Geology and the Environment,2015,75(1):401-412.
[19]刘汉龙,朱春鹏,张晓璐.酸碱污染土基本物理性质的室内测试研究[J].岩土工程学报,2008,30(8):1213-1217.
LIU Han-long,ZHU Chun-peng,ZHANG Xiao-lu.Fundamental Physical Properties of Soil Polluted by Acid and Alkali in Laboratory[J].Chinese Journal of Geotechnical Engineering,2008,30(8):1213-1217.
[20]朱春鹏,刘汉龙,沈 扬.酸碱污染软黏土变形性质的三轴试验研究[J].岩土工程学报,2009,31(10):1559-1563.
ZHU Chun-peng,LIU Han-long,SHEN Yang.Triaxial Tests on Deformation Characteristics of Soft Soils Polluted by Acid and Alkali[J].Chinese Journal of Geotechnical Engineering,2009,31(10):1559-1563.
[21]朱春鹏,刘汉龙,张晓璐.酸碱污染土压缩特性的室内试验研究[J].岩土工程学报,2008,30(10):1477-1483.
ZHU Chun-peng,LIU Han-long,ZHANG Xiao-lu.Laboratory Tests on Compression Characteristics of Soil Polluted by Acid and Alkali[J].Chinese Journal of Geotechnical Engineering,2008,30(10):1477-1483.
[22]朱春鹏,刘汉龙,沈 扬.酸碱污染土强度特性的室内试验研究[J].岩土工程学报,2011,33(7):1146-1152.
ZHU Chun-peng,LIU Han-long,SHEN Yang.Laboratory Tests on Shear Strength Properties of Soil Polluted by Acid and Alkali[J].Chinese Journal of Geotechnical Engineering,2011,33(7):1146-1152.
[23]高彦斌,刘佳丹,王雨滢.酸碱污染重塑粉质黏土的塑性及其与力学特性的关系[J].岩土工程学报,2018,40(11):2103-2109.
GAO Yan-bin,LIU Jia-dan,WANG Yu-ying.Plasticity and Its Relationship with Mechanical Properties of a Remolded Silty Clay Contaminated by Several Acids and Bases[J].Chinese Journal of Geotechnical Engineering,2018,40(11):2103-2109.
[24]PENG J B,QI S W,WILLIAMS A,et al.Preface to the Special Issue on “Loess Engineering Properties and Loess Geohazards”[J].Engineering Geology,2017,236:1-3.
[25]陈 筠,赵 鹏,何维锋,等.碱污染红黏土抗剪强度特性室内试验研究[J].长江科学院院报,2017,34(12):94-100.
CHEN Jun,ZHAO Peng,HE Wei-feng,et al.Laboratory Tests on Shear Strength Characteristics of Red Clay Polluted by Alkali[J].Journal of Yangtze River Scientific Research Institute,2017,34(12):94-100.
[26]任礼强,黄 英,樊宇航,等.碱污染红土的抗剪强度特性及碱土作用特征研究[J].水文地质工程地质,2014,41(5):75-81.
REN Li-qiang,HUANG Ying,FAN Yu-hang,et al.Research on Shear Strength Properties of Alkali Pollution Laterite and the Action Characteristics of Alkali and Laterite[J].Hydrogeology & Engineering Geology,2014,41(5):75-81.
[27]刘 华,张硕成,牛富俊,等.酸碱污染Q₃黄土的一维压缩特征试验研究[J].岩土力学,2019,40(增1):210-216.
LIU Hua,ZHANG Shuo-cheng,NIU Fu-jun,et al.Experimental Study on One-dimensional Compression Characteristics of Q₃ Loess Contaminated by Acid or Alkali Solutions[J].Rock and Soil Mechanics,2019,40(S1):210-216.
[28]GB/T 50123—2019,土工试验方法标准[S].
GB/T 50123—2019,Standard for Geotechnical Testing Method[S].
[29]牟春梅,韦瑜玺.桂林地区酸、碱污染红黏土力学效应弱化试验研究[J].重庆大学学报,2019,42(6):109-118.
MU Chun-mei,WEI Yu-xi.Experimental Study on the Weakening of Mechanical Properties of Red Clay Contaminated by Acid and Alkali in Guilin Area[J].Journal of Chongqing University,2019,42(6):109-118.
[30]GB 50021—2001,岩土工程勘察规范[S].
GB 50021—2001,Coed for Investigation of Geotechnical Engineering[S].

相似文献/References:

[1]王佳,白晓红,王梅,等.黄土湿陷性试验研究[J].建筑科学与工程学报,2006,23(03):41.
　WANG Jia,BAI Xiao-hong,WANG Mei,et al.Study of Collapsibility Test on Loess[J].Journal of Architecture and Civil Engineering,2006,23(02):41.
[2]黄 华,刘瑞阳,刘笑笑,等.黄土湿陷特性及其改性方法研究进展[J].建筑科学与工程学报,2024,41(02):1.[doi:10.19815/j.jace.2023.08056]
　HUANG Hua,LIU Ruiyang,LIU Xiaoxiao,et al.Research progress on collapsible characteristics of loess and its modification methods[J].Journal of Architecture and Civil Engineering,2024,41(02):1.[doi:10.19815/j.jace.2023.08056]
[3]李 萍,董鸾花,赵枝艳,等.黄土抗剪强度参数均值与方差的Bayes估计及其应用[J].建筑科学与工程学报,2024,41(02):163.[doi:10.19815/j.jace.2022.04123]
　LI Ping,DONG Luanhua,ZHAO Zhiyan,et al.Bayes estimation of mean and variance for shear strength parameters of loess and its application[J].Journal of Architecture and Civil Engineering,2024,41(02):163.[doi:10.19815/j.jace.2022.04123]

备注/Memo

备注/Memo:

收稿日期:2020-09-30
基金项目:国家自然科学基金项目(51608436,51778528); 陕西省自然科学基础研究计划项目(2019JQ756);
西安理工大学省部共建西北旱区生态水利国家重点实验室项目(2019KJCXTD-12)
作者简介:刘 华(1983-),男,陕西延安人,副教授,工学博士,E-mail:liuhua029@xauat.edu.cn。

常用功能

更新日期/Last Update: 2021-03-20