New Approach for Estimation of Static and Seismic Active Earth Pressure |
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| Authors: | Deepankar Choudhury Shailesh Singh |
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| Institution: | (1) Department of Civil Engineering, Indian Institute of Technology Bombay, Powai, Mumbai, 400 076, India;(2) Department of Civil Engineering, I.I.T. Kanpur, Kanpur, 208 016, India |
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| Abstract: | To estimate static and seismic active earth pressure (Pad) on a rigid retaining wall, numerical analyses using different step sizes have been carried out in this paper, based on the
modified Culmann line method by considering Coulomb’s planar rupture surface. Equivalent pseudo-static seismic forces are
considered in the analysis. A new concept of modified unit weight by considering ground surcharge is introduced under static
and seismic conditions. By numerical analysis, area of soil (A) has been estimated to obtain the ratio of A/A0 where A0 is θh2, θ is the angle between retaining structure and ground surface and h is the vertical height of the wall. This ratio remains constant for a particular type of soil and has been used to estimate
the maximum active earth pressure using force diagram. Results are provided in tabular form for easy calculation of the coefficient
of static and seismic active earth pressure. Present results by considering the new technique, compares well with the results
obtained by earlier researchers. |
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| Keywords: | earth pressure earthquakes pseudo-static retaining walls |
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