The Analysis of Seepage Characteristics and Stability of Carbonaceous Mudstone Embankment Slope in Rainfall Condition

Author:

Zeng Ling1,Fu Hong Yuan1,Li Tao1,Qin Yan Qi1

Affiliation:

1. Changsha University of Science and Technology

Abstract

Based on the actual rainfall data and saturated-unsaturated seepage theory, the change of pore water pressure and volumetric moisture content of carbonaceous mudstone embankment slope were studied under designed rainfall intensity. At the same time, the effect of rainfall intensity change on the slope failure mode and safety coefficient was analyzed. The results of the study show that: Continuous rainfall will make the surface layer negative pore water pressure of carbonaceous mudstone embankment slope loss, and in transient saturation zone the volumetric moisture content reaches the saturated moisture content. Safety coefficient of carbonaceous mudstone embankment slope gradually decreases with the rainfall continuing, potential sliding surface also have the tendency of extending into the embankment.

Publisher

Trans Tech Publications, Ltd.

Subject

General Engineering

Reference5 articles.

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3. Weici Gu: Seepage calculation principle and application. China building material industry publishing house, 2000. In Chinese.

4. Van Genuchten M Th, Leij FJ, Yates S R: The RETIC code for quantifying the hydraulic functions of unsaturated soil[R]. washington: USEnvironmental Protection Agency, (1991).

5. Fredlund.D. G, Vanapalli.S. K, xing A, etal: Predicting the shear strength function for unsaturated soil using the soil-water characteristic curve. Proceedings of First International Conference on Unsaturated Soil (I) Paris : International Academic Publishers, 189-193(1995).

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