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Tunneling through Garlock fault
Two shields were used in driving 5 mi long water supply tunnel through Tehachapi Mountains in Southern California; laser beam was used for tunnel alignment; 24-ft 4 in. diam steel shields are forced forward with ring of hydraulic jacks mounted at their rear ends; each one has thrust of 250 tons, for total of 11,500,000 lb.
Tunneling through Garlock fault
Two shields were used in driving 5 mi long water supply tunnel through Tehachapi Mountains in Southern California; laser beam was used for tunnel alignment; 24-ft 4 in. diam steel shields are forced forward with ring of hydraulic jacks mounted at their rear ends; each one has thrust of 250 tons, for total of 11,500,000 lb.
Tunneling through Garlock fault
Western Construction
Western Construction ; 42
1967
Article (Journal)
English
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Adam Garlock. April 26, 1848. Laid upon the table
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