Transactions of the American Society of Civil Engineers, vol. LXVIII, Sept. 1910
Transactions of the American Society of Civil Engineers, vol. LXVIII, Sept. 1910
The Bergen Hill Tunnels. Paper No. 1154
Book Excerpt
Pounds | | | | Depth | Cubic | of | Advance | | | Drilled | Yards | Dynamite | | +---------+------------+-----------+------------+---------+ | Heading | 190 to 220 | 35 to 42 | 134 to 196 | 6½ to 8 | +---------+------------+-----------+------------+---------+ | | | | | | | Bench | 145 " 190 | 90 to 110 | 118 " 167 | 6½ " 8 | +---------+------------+-----------+------------+---------+
+-----+-------------------------+----------------------------------+ | | Per Cubic Yard | Per linear Foot of Tunnel | | +------------+------------+-------+-----------+--------------+ | | Linear | Pounds | Cubic | No. of | Pounds | | | Feet | of | Yards | Feet | of | | | Drilled | Dynamite | | Drilled | Dynamite | +-----+------------+------------+-------+-----------+--------------+ | Hd. | 5.4 to 6.0 | 3.9 to 5.0 | 5.3 | 28 to 32 | 20.7 to 26.5 | +-----+------------+------------+-------+-----------+--------------+ | B. | 1.6 " 1.9 | 1.3 " 1.8 | 13.7 | 22 " 36 | 17.8 " 24.7 | +-----+------------+------------+--
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