Article(id=1222963539279598107, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1222963536863678929, articleNumber=null, orderNo=null, doi=10.20040/j.cnki.1000-7709.2023.20221276, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1655654400000, receivedDateStr=2022-06-20, revisedDate=1658851200000, revisedDateStr=2022-07-27, acceptedDate=null, acceptedDateStr=null, onlineDate=1769506829328, onlineDateStr=2026-01-27, pubDate=1682352000000, pubDateStr=2023-04-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1769506829328, onlineIssueDateStr=2026-01-27, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1769506829328, creator=13701087609, updateTime=1769506829328, updator=13701087609, issue=Issue{id=1222963536863678929, tenantId=1146029695717560320, journalId=1205116964453384197, year='2023', volume='41', issue='4', pageStart='1', pageEnd='220', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1769506828752, creator=13701087609, updateTime=1769508076664, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1222968771057279321, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1222963536863678929, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1222968771057279322, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1222963536863678929, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=190, endPage=194, ext={EN=ArticleExt(id=1222963539959075391, articleId=1222963539279598107, tenantId=1146029695717560320, journalId=1205116964453384197, language=EN, title=Comparison and Analysis of Mechanical Properties and Physical Mechanism of Expansive Soil Improved by Different methods, columnId=1222925283779400191, journalTitle=Water Resources and Power, columnName=WATER CONSERVANCY AND HYDROPOWER ENGINEERING, runingTitle=null, highlight=null, articleAbstract=

In order to solve the sliding failure problem caused by the wet expansion and dry shrinkage of expansive soil in the North Xinjiang water supply project, lime, cement and sand and gravel were used as the main curing materials. Through unconfined compressive strength test, direct shear test, compression test and SEM test, the influence of test dosage on the mechanical properties of improved expansive soil and the formation mechanism of microstructure strength under different improvement methods were studied by combining macro and micro. The test results show that with the continuous increase of the amount of lime and sand gravel, the soil strength increases steadily, while the peak value of cement improved soil appears when the amount of lime and sand gravel is about 7%. For lime and sand gravel, when the amount of lime and sand gravel is about 6% and 30% respectively, the overall compressibility of the improved soil is low, the cohesion is large, and the shear and compressive strength is high, which can meet the requirements of engineering application. The SEM analysis of lime and cement stabilized soil with the best mix ratio shows that a large number of curly flake hydrated gel materials are generated, which significantly reduces the pores compared with the original expansive soil, and the aggregates are closely cemented. From the macro mechanical properties, the mechanical properties and stability of the solidified soil are greatly improved.

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为解决北疆供水工程由于膨胀土湿胀干缩引起的滑动破坏问题,采用石灰、水泥和砂石料作为主要的固化材料,通过无侧限抗压强度试验、直剪试验、压缩试验和SEM试验,宏微观相结合探究不同改良方法下试验掺量对改良膨胀土力学特性的影响和微观结构强度形成机理。结果表明,随石灰、砂石料掺量的不断增加,土体强度稳步提升,而水泥改良土在掺量为7%左右时出现峰值,石灰、砂石料在掺量分别约为6%、30%时,改良土整体结构可压缩性较低,粘聚力较大,抗剪抗压强度较高,可满足工程应用要求;对最佳配合比的石灰与水泥固化土进行SEM分析发现,均有大量卷曲薄片状水化凝胶物质生成,相比原膨胀土孔隙减少明显,团粒胶结紧密,从宏观力学性能上表现为固化土体力学性能和稳定性能得到大幅提高。

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张凌凯(1987-),男,博士、副教授,研究方向为环境岩土工程,E-mail:
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柴石玉(1995-),男,硕士研究生,研究方向为膨胀土力学特性试验,E-mail:

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不同改良方法对膨胀土力学性质影响及物理机制对比分析
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柴石玉 a, b , 张凌凯 a, b
水电能源科学 | 水利水电工程 2023,41(4): 190-194
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水电能源科学 | 水利水电工程 2023, 41(4): 190-194
不同改良方法对膨胀土力学性质影响及物理机制对比分析
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柴石玉a, b , 张凌凯a, b
作者信息
  • a.新疆农业大学水利与土木工程学院,新疆 乌鲁木齐 830052
  • b.新疆农业大学新疆水利工程安全与水灾害防治重点实验室,新疆 乌鲁木齐 830052
  • 柴石玉(1995-),男,硕士研究生,研究方向为膨胀土力学特性试验,E-mail:

通讯作者:

张凌凯(1987-),男,博士、副教授,研究方向为环境岩土工程,E-mail:
Comparison and Analysis of Mechanical Properties and Physical Mechanism of Expansive Soil Improved by Different methods
Shi-yu CHAIa, b , Ling-kai ZHANGa, b
Affiliations
  • a.College of Hydraulic and Civil Engineering, Xinjiang Agricultural University, Urumqi 830052, China
  • b.Xinjiang Key Laboratory of Water Conservancy Engineering Safety and Water Disaster Prevention, Xinjiang Agricultural University, Urumqi 830052, China
出版时间: 2023-04-25 doi: 10.20040/j.cnki.1000-7709.2023.20221276
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为解决北疆供水工程由于膨胀土湿胀干缩引起的滑动破坏问题,采用石灰、水泥和砂石料作为主要的固化材料,通过无侧限抗压强度试验、直剪试验、压缩试验和SEM试验,宏微观相结合探究不同改良方法下试验掺量对改良膨胀土力学特性的影响和微观结构强度形成机理。结果表明,随石灰、砂石料掺量的不断增加,土体强度稳步提升,而水泥改良土在掺量为7%左右时出现峰值,石灰、砂石料在掺量分别约为6%、30%时,改良土整体结构可压缩性较低,粘聚力较大,抗剪抗压强度较高,可满足工程应用要求;对最佳配合比的石灰与水泥固化土进行SEM分析发现,均有大量卷曲薄片状水化凝胶物质生成,相比原膨胀土孔隙减少明显,团粒胶结紧密,从宏观力学性能上表现为固化土体力学性能和稳定性能得到大幅提高。

膨胀土  /  固化改良  /  力学特性  /  微观结构  /  强度机理

In order to solve the sliding failure problem caused by the wet expansion and dry shrinkage of expansive soil in the North Xinjiang water supply project, lime, cement and sand and gravel were used as the main curing materials. Through unconfined compressive strength test, direct shear test, compression test and SEM test, the influence of test dosage on the mechanical properties of improved expansive soil and the formation mechanism of microstructure strength under different improvement methods were studied by combining macro and micro. The test results show that with the continuous increase of the amount of lime and sand gravel, the soil strength increases steadily, while the peak value of cement improved soil appears when the amount of lime and sand gravel is about 7%. For lime and sand gravel, when the amount of lime and sand gravel is about 6% and 30% respectively, the overall compressibility of the improved soil is low, the cohesion is large, and the shear and compressive strength is high, which can meet the requirements of engineering application. The SEM analysis of lime and cement stabilized soil with the best mix ratio shows that a large number of curly flake hydrated gel materials are generated, which significantly reduces the pores compared with the original expansive soil, and the aggregates are closely cemented. From the macro mechanical properties, the mechanical properties and stability of the solidified soil are greatly improved.

expansive soil  /  solidification improvement  /  mechanical properties  /  microstructure  /  strength mechanism
柴石玉, 张凌凯. 不同改良方法对膨胀土力学性质影响及物理机制对比分析. 水电能源科学, 2023 , 41 (4) : 190 -194 . DOI: 10.20040/j.cnki.1000-7709.2023.20221276
Shi-yu CHAI, Ling-kai ZHANG. Comparison and Analysis of Mechanical Properties and Physical Mechanism of Expansive Soil Improved by Different methods[J]. Water Resources and Power, 2023 , 41 (4) : 190 -194 . DOI: 10.20040/j.cnki.1000-7709.2023.20221276
  • 新疆维吾尔自治区天山青年计划项目(2019Q077)
  • 新疆维吾尔自治区高校科研计划项目(XJEDU2019Y020)
  • 新疆维吾尔自治区青年基金项目(2019D01B16)
2023年第41卷第4期
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doi: 10.20040/j.cnki.1000-7709.2023.20221276
  • 接收时间:2022-06-20
  • 首发时间:2026-01-27
  • 出版时间:2023-04-25
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  • 收稿日期:2022-06-20
  • 修回日期:2022-07-27
基金
新疆维吾尔自治区天山青年计划项目(2019Q077)
新疆维吾尔自治区高校科研计划项目(XJEDU2019Y020)
新疆维吾尔自治区青年基金项目(2019D01B16)
作者信息
    a.新疆农业大学水利与土木工程学院,新疆 乌鲁木齐 830052
    b.新疆农业大学新疆水利工程安全与水灾害防治重点实验室,新疆 乌鲁木齐 830052

通讯作者:

张凌凯(1987-),男,博士、副教授,研究方向为环境岩土工程,E-mail:
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2种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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