International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 379
eachpoint. By cutting a channel across the narrow neck E, bothbridges are avoided. Such instances are of frequentoccurence. 1535. Crib Work.—When the foot of an embankmentis subject to the erosion of a current of water, as at L in Fig.45G, a crib work of logs and stones is built into the embank-… … Fig. 457. Stand the action of the current. A general plan of the cribis given in Fig. 457. Cribs serve the purpose both of retaining walls and of re-vetments. Their chief advantage lies in their adaption tosituations where the cost of retaining wall foundationswould be excessive. They can be…
Railroad engineering
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