Seismic passive earth resistance in submerged soils using modified pseudo-dynamic method with curved rupture surface
| Autor: | B. Giridhar Rajesh, Deepankar Choudhury |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Design
0211 other engineering and technologies Ocean Engineering 02 engineering and technology Oceanography Retaining wall Forces Viscoelasticity Physics::Geophysics Physics::Fluid Dynamics Acceleration Pore water pressure Submerged Soil Lateral earth pressure Earthquakes Retaining Walls Geotechnical engineering 021101 geological & geomatics engineering 021110 strategic defence & security studies Geotechnical Engineering and Engineering Geology Limit Equilibrium Method Seismic Passive Earth Resistance Waterfront Retaining Wall Current (stream) Computation Soil water Pressure Coefficients Stability Dynamic method Geology |
| Zdroj: | Marine Georesources & Geotechnology. 35:930-938 |
| ISSN: | 1521-0618 1064-119X |
| DOI: | 10.1080/1064119x.2016.1260077 |
| Popis: | The sparsity of examination of seismic passive earth pressure acting on retaining wall holding soil backfill with full submergence, which is more common in waterfront areas, can be noticed from the literature. In the current study, a closed-form solution to compute the seismic passive earth pressure on nonvertical rigid retaining wall retaining a backfill with full submergence is proposed using the modified pseudo-dynamic approach. A nonlinear rupture surface (logarithmic spiral+straight line) in a submerged backfill of viscoelastic nature has been assumed. The presented modified pseudo-dynamic method overcomes the limitations of the existing pseudo-dynamic method for submerged soils. The proposed methodology has been thoroughly validated with the available literature. The influences of seismic acceleration coefficients, excess pore water pressure ratio, wall inclination, and soil and wall friction angles have been studied. It has been noticed that the consideration of excess pore pressure ratio leads to significant decrease in seismic passive resistance of the soil which in turn lead to extra hydraulic pressure acting on the wall in submerged backfill. There is a 57% decrease in seismic passive earth pressure coefficient as the wall inclination changes from -15 degrees to 15 degrees. |
| Databáze: | OpenAIRE |
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