吉林省延边地区路基边坡膨胀土孔隙分布特性

针对膨胀土边坡稳定性问题,对吉林省延边地区路基边坡膨胀土进行野外调查及室内测试.对膨胀土的粒度成分、矿物成分进行了测试鉴定,并对土样进行了膨胀性试验.此外利用压汞试验对其进行了孔隙结构特征的研究,利用分形几何理论,结合土样的膨胀特性,将膨胀土孔隙分布分成大、中小、微、超微孔隙4个区间.研究结果表明：经膨胀性测试,研究区5个土样为弱膨胀性土,其中膨胀力较强的土孔隙在超微至微孔隙区间分布相对较多,而膨胀力较弱的土孔隙分布在中与大孔隙区间相对较多....

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Bibliographic Details
Published in东北大学学报（自然科学版） Vol. 38; no. 1; pp. 132 - 137
Main Author 鲍硕超 王清 陈剑平 鲍新华
Format Journal Article
LanguageChinese
Published 吉林大学 环境与资源学院，吉林 长春 130021 2017
吉林建筑大学 土木工程学院，吉林 长春130118%吉林大学 建设工程学院,吉林 长春,130026%吉林大学 环境与资源学院,吉林 长春,130021
Subjects
分形几何
压汞试验
孔隙分布
膨胀土
膨胀机理
膨胀土
孔隙分布
fractal geometry
膨胀机理
expansive soil
分形几何
压汞试验
mercury injection test
pore distribution
expansion mechanism
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ISSN1005-3026
DOI10.3969/j.issn.1005-3026.2017.01.027

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Summary:针对膨胀土边坡稳定性问题,对吉林省延边地区路基边坡膨胀土进行野外调查及室内测试.对膨胀土的粒度成分、矿物成分进行了测试鉴定,并对土样进行了膨胀性试验.此外利用压汞试验对其进行了孔隙结构特征的研究,利用分形几何理论,结合土样的膨胀特性,将膨胀土孔隙分布分成大、中小、微、超微孔隙4个区间.研究结果表明：经膨胀性测试,研究区5个土样为弱膨胀性土,其中膨胀力较强的土孔隙在超微至微孔隙区间分布相对较多,而膨胀力较弱的土孔隙分布在中与大孔隙区间相对较多.
Bibliography:expansive soil; pore distribution; fractal geometry; mercury injection test; expansion mechanism
21-1344/T
BAO Shuo-chao;WANG Qing;CHEN Jian-ping;BAO Xin-hua（1. College of Environment and Resources,Jilin University, Changchun 130021, China; 2. College of Civil Engineering,Jilin Jianzhu University,Changchun 130118,China; 3. College of Construction Engineering,Jilin University,Changchun 130026,China）
This research aims at the stability of expansive soil which were collected from the subgrade slope of expansive soil in Yanbian region of Jilin Province. The physicochemical property,soil grain,mineral composition and the expansion property of the specimen were tested.The pore structure characteristics were studied using mercury injection experiment. Furthermore,the soil pores were divided into four size intervals,i. e.,big pores,moderate pores,micro-pores and ultra-micro pores by using fractal geometry theory. The study indicated that five specimens were identified as slightly-expansive soil by expansibility testing.
ISSN:1005-3026
DOI:10.3969/j.issn.1005-3026.2017.01.027