Physico-mechanical properties of loess-paleosol sequence from $ Q_{4} $ to $ Q_{1} $ strata in the Chinese Loess Plateau
Abstract With the rapid development of the Chinese Loess Plateau, engineering projects built in the deep loess strata may be concurrently constructed in the $ Q_{4} $, $ Q_{3} $, $ Q_{2} $, and $ Q_{1} $ strata from top to bottom. However, the physico-mechanical properties of the loess-paleosol sequence from $ Q_{4} $ to $ Q_{1} $ strata have been unclear. In this paper, the physico-mechanical properties of the loess-paleosol sequence in the Zaosheng profile of Eastern Gansu were determined, and the relationship between chemical properties, microstructures, and physico-mechanical properties was discussed. The results showed that the dry density, specific gravity, saturation, liquid limit, compressive modulus, characteristic value of foundation bearing capacity, and cohesion of loess and paleosol exhibited an overall increasing trend from $ Q_{4} $ to $ Q_{1} $ strata, and their values tended to fluctuate regularly with depth. These parameters of the paleosol were larger than those of the underlying loess, while the fluctuation pattern between the internal friction angle and depth was opposite to the above. The fluctuation pattern of water content from $ Q_{4} $ to $ Q_{1} $ strata was bounded by the groundwater level. Moreover, the increase in chemical weathering intensity from northwest to southeast Loess Plateau would, therefore, contribute to lower (higher) clay content, liquid limit, and plastic index of the loess and paleosol in $ Q_{4} $ to $ Q_{1} $ strata in the northwest (southeast), and decreasing sand content in the corresponding direction..
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2022 |
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| Erschienen: |
2022 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:81 |
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| Enthalten in: |
Bulletin of engineering geology and the environment - 81(2022), 10 vom: 14. Sept. |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Zhu, Jianghong [VerfasserIn] |
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| Links: |
Volltext [lizenzpflichtig] |
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| Themen: |
Chemical properties |
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| Anmerkungen: |
© Springer-Verlag GmbH Germany, part of Springer Nature 2022. Springer Nature or its licensor holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law. |
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| doi: |
10.1007/s10064-022-02899-2 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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SPR048084794 |
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| 520 | |a Abstract With the rapid development of the Chinese Loess Plateau, engineering projects built in the deep loess strata may be concurrently constructed in the $ Q_{4} $, $ Q_{3} $, $ Q_{2} $, and $ Q_{1} $ strata from top to bottom. However, the physico-mechanical properties of the loess-paleosol sequence from $ Q_{4} $ to $ Q_{1} $ strata have been unclear. In this paper, the physico-mechanical properties of the loess-paleosol sequence in the Zaosheng profile of Eastern Gansu were determined, and the relationship between chemical properties, microstructures, and physico-mechanical properties was discussed. The results showed that the dry density, specific gravity, saturation, liquid limit, compressive modulus, characteristic value of foundation bearing capacity, and cohesion of loess and paleosol exhibited an overall increasing trend from $ Q_{4} $ to $ Q_{1} $ strata, and their values tended to fluctuate regularly with depth. These parameters of the paleosol were larger than those of the underlying loess, while the fluctuation pattern between the internal friction angle and depth was opposite to the above. The fluctuation pattern of water content from $ Q_{4} $ to $ Q_{1} $ strata was bounded by the groundwater level. Moreover, the increase in chemical weathering intensity from northwest to southeast Loess Plateau would, therefore, contribute to lower (higher) clay content, liquid limit, and plastic index of the loess and paleosol in $ Q_{4} $ to $ Q_{1} $ strata in the northwest (southeast), and decreasing sand content in the corresponding direction. | ||
| 650 | 4 | |a Loess-paleosol sequence |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Physico-mechanical properties |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Strata distribution |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Chemical properties |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Microstructure |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Chinese Loess Plateau |7 (dpeaa)DE-He213 | |
| 700 | 1 | |a Zhang, Huyuan |4 aut | |
| 700 | 1 | |a Yang, Shengqing |4 aut | |
| 700 | 1 | |a Wang, Tingting |4 aut | |
| 700 | 1 | |a Zhou, Guangping |4 aut | |
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| 773 | 1 | 8 | |g volume:81 |g year:2022 |g number:10 |g day:14 |g month:09 |
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