|本期目录/Table of Contents|

[1]刘 华,胡文乐,王铁行,等.碱液加固黄土的电阻率特征试验及其效果评价[J].建筑科学与工程学报,2021,38(02):99-107.[doi:10.19815/j.jace.2020.09080]
 LIU Hua,HU Wen-le,WANG Tie-hang,et al.Resistivity Characteristics Test and Effect Evaluation of Alkali Solution Strengthening Loess[J].Journal of Architecture and Civil Engineering,2021,38(02):99-107.[doi:10.19815/j.jace.2020.09080]
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碱液加固黄土的电阻率特征试验及其效果评价(PDF)
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《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 Hua1,2, HU Wen-le1, WANG Tie-hang1,2, WANG Song-he3, LIU Nai-fei1,2, 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.

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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.
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[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]
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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。
更新日期/Last Update: 2021-03-20