Soil nailing refers to
a. a cut face of excavation supported by closely spaced steel bars or angles.
b. a cut face of excavation supported by closely spaced steel bars and shotcrete.
c. a cut face of excavation supported by closely spaced steel bars and shotcrete over WWR.
d. a cut face of excavation supported by closely spaced steel bars in grouted holes and shotcrete over WWR.
e. none of the above.
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