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The present paper highlights the importance of seepage force on the seismic passive earth resistance when the backfill is saturated.
Instantaneous liquefaction can be induced by the upward seepage force generated in a sandy seabed under wave troughs.
In this paper, the seepage force problems arising from the flow of groundwater into a tunnel were studied.
Based on the NI LW approximation, analytic expressions for the second-order difference-frequency seepage force by bichromatic incident waves are developed.
These graphs, combined with the developed simple equations, can provide a cue to the design engineers about how the seepage force affects the seismic passive earth resistance.
Example problem showed that the seepage force is greatly influenced by the tunnel advance rate in case of less permeable ground.
Similar(41)
Seepage forces can cause a significant threat to the safety of underwater tunnels because the seepage forces remain while the effective overburden pressure can be distributed by the arching effect during tunnel excavation.
Although seepage forces are very influential in underwater tunnels and their support systems, the effects of seepage forces on the ground reaction curve of a tunnel reinforced with grouted bolts and grouting have yet to be clearly defined.
Especially, the effect of tunnel advance rate on the seepage forces and thus on the tunnel face stability was studied.
Thirdly, we performed a parametric study of grouting reinforcement effects on the ground reaction curve considering seepage forces.
The seepage forces are determined numerically through steady-state, three-dimensional seepage flow analysis which takes account of the characteristics of a given drainage scheme.
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