Idro-sviluppo elettrico sullo Snake River a buoi piegare, Oregon . b- ned trith dan disegnati in scala di 1 pollice paria dieci piedi. Area in quadrati. Vol di sez. Vt.di sez. Seetion (da planimeter) 1 piedi largo. 1 ft. marea #, (cu.ft) 1-7 84.18 9419. 561,500 2-7 18.68 1868 230°00 3-7 13,86 1336 207,900 4-7 9,53 953 142,950 5-7 6.05 605 60,750 C-7 3.12 312 46,800 7 .93 93 13,9 50 -10- Xhe materiale del dan che è granito è stata assumedto pesare 150 libbre per piede cubico. Le forze sho^nin la quarta colonna rappresentano i pesi del var-sezioni ious agendo verso il basso attraverso i centri di gra-vity

• Collaboratore: The Reading Room / Alamy Foto Stock
• ID dell’immagine: 2AJAY41
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• Dimensioni: 1984 x 1260 px | 33,6 x 21,3 cm | 13,2 x 8,4 inches | 150dpi

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Hydro-electric development on the Snake River at Oxen Bend, Oregon . b- ned trith the dan drawn to a scale of 1 inch equalto ten feet. Area sq. in. Vol. of Sect. Vt.of Sect. Seetion (by planimeter) 1 ft. wide. 1 ft. tide #, (cu.ft) 1-7 84.18 9419. 561, 500 2-7 18.68 1868 230, °00 3-7 13.86 1336 207, 900 4-7 9.53 953 142, 950 5-7 6.05 605 60, 750 C-7 3.12 312 46, 800 7 .93 93 13, 9 50 -10- Xhe material of the dan which is granite was assumedto weigh 150 pounds per cubic foot. The forces sho^nin the fourth column represent the weights of the var-ious sections acting down through the centers of gra-vity of the respective sections. It is now necessaryto obtain the force and the point of application ofthe force due to the ^ater. The center of pressure, Xc, was determined by the equationX = 2 hj - H-, 3 h22 - hiThe force, E, due to the ^ater acting at Xc, wasdetermined by the equation 1J = I bhh^ rr is the reight of one cubic foot of water and isequal to 63.6 , b is the width of the section and <vastaken a.a one foot. The remaining terms are explainedby figure IX.. Fig. II. -11- *a P 61 84, 800 57. 8 76, 100 47.9 56, 700 37.9 36, 700 97 .9 23, 500 17.2 12, 150 7.2 3, 960 The following results were obtained. ^oct. hi ho X h 1-7 14.9 75.3 51.6 44.5 2-7 14.2 71.4 49.1 43.6 3-7 14.2 61.4 42.6 37.6 4-7 14.2 51.4 36.2 32.6 5-7 14.2 41.4 30 27.6 6-7 14.2 31.4 23.8 2^.6 7 14.2 21.4 18.0 17.6 By combining P acting horizontally thru C andtho weight of the dam acting vertically thru the cen-ter of gravity as previously determined, the resultantpressure nay be determined for each section. By con-necting the points where this pressure acts on thetoases of the respective sections, the line of result-ant pressures may be obtained. This line was found tobe very close to the center of the din. It is now necessary to determine the maximumpressure acting on the base of the dan. i— * f e 1 [ J J J 1 1 ii 1 1 1 l sr~ Fig. III. -18» Figure III represents fhe trapezoid of pressure on the base of the dan.

Parole chiave associate all'immagine

• bookcentury1900
• bookdecade1910
• bookidhydroelectri
• bookyear1910