Table 1 ESRD for different rock contents and distributions.

From: Effects of rock content and spatial distribution on the stability of soil rock mixture embankments

Research Factor

ESRD

Applicable range and parameters

Rock Content (Rc)

\(y = - 0.84 + 0.9Rc + \left( {0.95 - 1.05Rc} \right)e^{{{{ - x} \mathord{\left/ {\vphantom {{ - x} {\left( {0.02 + 0.17Rc} \right)}}} \right. \kern-\nulldelimiterspace} {\left( {0.02 + 0.17Rc} \right)}}}}\)

Rc ≤  60%

\(y = - 0.97 + 2.1Rc + \left( { - 1.13 + 2.4Rc} \right)e^{{{{ - x} \mathord{\left/ {\vphantom {{ - x} {\left( {0.02 + 0.17Rc} \right)}}} \right. \kern-\nulldelimiterspace} {\left( {0.02 + 0.17Rc} \right)}}}}\)

Rc > 60%

Rock Block Distribution

\(y = - 0.51 - 0.82H + \left( { - 0.6 + 0.71H} \right)e^{{{{ - x} \mathord{\left/ {\vphantom {{ - x} {\left( {0.08 + 1.26H} \right)}}} \right. \kern-\nulldelimiterspace} {\left( {0.08 + 1.26H} \right)}}}}\)