学术
三峡库区秭归县膨胀土研究
张加桂[1,2] 曲永新[3] 余祖湛[4]
[1]中国地质科学院地质力学研究所,北京100081 [2]中国地质环境监测院,北京100081 [3]中国科学院地质与地球物理研究所,北京100029 [4]湖北省秭归县国土资源局,秭归443600
摘 要:
秭归县膨胀土是继在三峡库区巫山县、奉节县和兴山县发现膨胀土之后发现的又一处膨胀土，从而揭示了三峡库区膨胀土的地域性。秭归县膨胀土与三峡其他地方的膨胀土一样发育于特殊的地质环境内，具有坡洪积成因和较均一土体结构。土的膨胀性主要取决于其中的蒙脱石，测试表明有效蒙脱石含量达18．67％，以中等混层比的伊利石／蒙脱石（I／S）混层矿物形式存在。土具有高塑限、高液限和低抗剪强度。判别表明，它达到了国内外膨胀土标准和界限。[著者文摘]
文章出处:
《水文地质工程地质》-2008年1期 -28-31页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
1000-3665（2008）01-0028-04
Research on the expansive soil in Zigui County, the Three Gorges Reservoir region
ZHANG Jia-gui, Qu Yong-xin , YU Zu-zhan （ 1. Institute of Geomechanics, CA GS, Beijing 100081, China ; 2. China Institute of Geo Environmental Monitoring, Beijing 100081, China; 3. Institute of Geology and Geophysics, CAS, Beijing 100029, China ; 4. Zigui County Bureau of Land and Resources, Hubei Province, Zigui 443600, China）
Abstract:
The expansive soil in Zigui County is another discovery in the Three Gorges Reservoir region after the discovery of expansive soil in Wushan County, Fengjie County and Xingshan County, which discloses the locality feature of the expansive soils. The expansive soil, the same as the others in the Three Gorges Reservoir region, develops in the special geo-environment and with the Diluvial-to-Pluvial genesis and relatively uniform structure. The expansive property is mainly determined by the montmorillonite in it, whose content is about 18.67% by test and exhibiting in the form of mixed-layer mineral illite/ montmorillonite （I/S） with middle mixed-layer ratio. The soil has high plastic limit, high liquid limit and low anti-shearing intensity, and reaches the national and international standards and limits on expansive soil.[著者文摘]
Key words:
expansive soil ; engineering property ; Zigui County; the Three Gorges Reservoir region
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