Pseudo-Static Analysis of Soil Nailed Excavations |
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| Authors: | Gosavi Meenal Swami Saran Satyendra Mittal |
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| Institution: | (1) Department of Civil Engineering, College of Technology, G.B. Pant University of Agriculture and Technology, Pantnagar, Distt. UdhamSingh Nagar, Uttarakhand, 263 145, India |
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| Abstract: | In this paper, a pseudo-static analysis has been presented to investigate the stability of soil nailed vertical/nearly vertical
excavations. The failure surface is assumed as the arc of log-spiral passing through the toe of the excavation and intersecting
the ground at right angle. The horizontal and vertical seismic forces are taken in terms of horizontal and vertical seismic
coefficients. The internal failure mode of the nailed cut is considered either by pull-out or rupture or excessive bending
whichever is critical. Expression for the factor of safety is derived using moment equilibrium method. Results have been arranged
in tabular form considering ranges of the design parameters usually occur in practice. A typical table for the design of nailed
excavation with driven nails is presented in the paper. Analytical results have been compared with the findings of model tests
and reasonably good agreement has been observed. |
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| Keywords: | Soil nailing Pseudo-static analysis Factor of safety Parametric study Model tests Comparison Good agreement |
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