Seepage stability study on gravel soil slope in Jin’an bridge station reservoir

DOI

10.2991/icimm-15.2015.318How to use a DOI?

Keywords

reservoir ban; seepage; stability; water level fluctuation; gravel soil.

Abstract

Jin’an bridge station is located at the middle reaches of Jinsha river which is a new super large hydro-power station, since impounded in 2012, different levels of landslide happened to the reservoir slope, and the change of seepage field is one of the main reason causing geo-hazards. In this paper, according to the engineering investigation, using the soil-water characteristic curve, build a two-dimensional saturated-unsaturated seepage model of gravel soil slope in reservoir, which simulated the evolution course of the seepage and stability in the initial filling, normal operating and falling period, analyzed the influence of the saturation line and slope safe-ty factor caused by the water level fluctuation. Research shows that: In the initial filling, the saturation line presents as lower convex and the slope safety factor presents monotonic increase. In the normal operating, the saturation line tend to be gentle gradually and the slope safety factor presents monotonic increase. In the falling period, the saturation line presents as upper convex and the slope safety factor presents monotonic de-crease. In every period of time, the slope safety coefficient is less than 1, which shows landslide could hap-pen. The draw-down velocities is inversely correlated with slope stability.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - W.C. Xu
AU  - L.H. Zhang
AU  - J.H. Chen
AU  - Xueyu Dai
PY  - 2015/07
DA  - 2015/07
TI  - Seepage stability study on gravel soil slope in Jin’an bridge station reservoir
BT  - Proceedings of the 5th International Conference on Information Engineering for Mechanics and Materials
PB  - Atlantis Press
SP  - 1712
EP  - 1716
SN  - 2352-5401
UR  - https://doi.org/10.2991/icimm-15.2015.318
DO  - 10.2991/icimm-15.2015.318
ID  - Xu2015/07
ER  -