应力历史对饱和软土固结系数的影响

王江锋; 袁威; 何况; 郑培信

doi:10.3799/dqkx.2020.184

Volume 45 Issue 12

Dec. 2020

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Article Navigation > Earth Science > 2020 > 45(12): 4640-4648

Wang Jiangfeng, Yuan Wei, He Kuang, Zheng Peixin, 2020. Influence of Stress History on Consolidation Coefficient of Saturated Soft Soil. Earth Science, 45(12): 4640-4648. doi: 10.3799/dqkx.2020.184

Citation:

Wang Jiangfeng, Yuan Wei, He Kuang, Zheng Peixin, 2020. Influence of Stress History on Consolidation Coefficient of Saturated Soft Soil. Earth Science, 45(12): 4640-4648. doi: 10.3799/dqkx.2020.184

Wang Jiangfeng, Yuan Wei, He Kuang, Zheng Peixin, 2020. Influence of Stress History on Consolidation Coefficient of Saturated Soft Soil. Earth Science, 45(12): 4640-4648. doi: 10.3799/dqkx.2020.184

Citation:

Wang Jiangfeng, Yuan Wei, He Kuang, Zheng Peixin, 2020. Influence of Stress History on Consolidation Coefficient of Saturated Soft Soil. Earth Science, 45(12): 4640-4648. doi: 10.3799/dqkx.2020.184

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Influence of Stress History on Consolidation Coefficient of Saturated Soft Soil

doi: 10.3799/dqkx.2020.184

1.
College of Earth Sciences and Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
2.
Zhengzhou Metro Group Co., Ltd., Zhengzhou 450046, China
3.
Henan yaoluanxi Expressway Construction Co., Ltd., Zhengzhou 450046, China

Received Date: 2020-05-27
Publish Date: 2020-12-15

Abstract

Abstract

To explore the changing law of the consolidation coefficient of saturated soft soil under different consolidation states, based on Terzaghi's consolidation theory, using the relationship between permeability coefficient and void ratio, void ratio, and consolidation stress, the relationship between consolidation coefficient (C_v) and consolidation stress under normal consolidation and over consolidation is derived. The modified Terzaghi one-dimensional consolidation equation considering the influence of stress history and consolidation stress is obtained by substituting the relationship into the Terzaghi equation; The accuracy of the consolidation coefficient relation and the modified Terzaghi one-dimensional consolidation equation were verified by laboratory consolidation test and engineering application analysis. When the consolidation stress is larger, the results show that for normally consolidated soft soil when the consolidation stress is less than the previous consolidation stress, the consolidation coefficient increases with the increase of stress. When the consolidation stress is larger than the previous consolidation stress, the consolidation coefficient decreases with the increase of the stress. For over consolidated soft soil, the coefficient of consolidation increases with the increase of stress and finally tends to be gentle. When the load is small, the calculation results of the Terzaghi one-dimensional consolidation equation before and after the modification are similar; but when the load is large, the consolidation degree of the corrected Terzaghi one-dimensional consolidation equation lags significantly behind the calculation result before the modification. The influence of the previous stress history and the later consolidation stress on the consolidation coefficient of soft soil can not be ignored. The modified Terzaghi one-dimensional consolidation equation can more truly reflect the consolidation behavior of soil.
- saturated soft soil,
- consolidation coefficient,
- preconsolidation stress,
- stress history,
- over consolidation ratio(OCR),
- engineering geology

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References(34)

References

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Influence of Stress History on Consolidation Coefficient of Saturated Soft Soil

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