Page images
PDF
EPUB
[graphic][merged small][subsumed][subsumed][subsumed][graphic][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][merged small][subsumed][subsumed][ocr errors][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][merged small][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][ocr errors][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][merged small]

Figure 18. --Canal outlet works--Plan and sections. (Sheet 1 of 2.)

From drawing 328-D-950.

[ocr errors]
[merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][merged small][ocr errors][merged small][merged small]

Figure 18.--Canal outlet works--Plan and sections. (Sheet 2 of 2.)

From drawing 328-D-950.

[blocks in formation]

NOTES

200

300

[ocr errors]

400

500

DISCHARGE CUBIC FEET PER SECOND

Discharges are based on a canal water surface of 2705.0.
For a canal water surface higher than 2705.0, the increase must be
subtracted from the reservoir water surface elev.to obtain the discharge.
For a canal water surface lower than 2705.0, the decrease must be added
to the reservoir water surface elev. to obtain the discharge.
In computing discharges, the losses through the operating gate and stilling well were
based on 1:12 scale model studies. The remainder of the losses were computed.
Any variations in discharge from these curves as determined by measurements
of flow downstream from the canal outlet works should be reported to the
Chief Engineer

[ocr errors]

600

700

UNITED STATES

800

[blocks in formation]

Figure 19.--Canal outlet works discharge curves.

distribution was investigated and was found to be nearly uniform with a maximum base pressure intensity of 3, 500 pounds per square foot, which is well within the safe bearing capacity of the foundation material.

The vertical shaft and the 900 bend were reinforced as needed to withstand the stresses produced by the assumed loadings. Allowable stresses for 3,000-pound concrete were used in the design.

(c) Trashracks. -- The five trashrack sections for the canal outlet works intake structure are each approximately 8 feet 3 inches wide by 7 feet 7 inches high. Each section consists of 2- by 5/8-inch trash bars supported by 8- by 1-1/4-inch horizontal plates. The ends of the horizontal plates are attached to vertical side members. The open space of 4-7/8 inches between trash bars is considered adequate protection for the high-pressure gate. The trashracks were designed for a differential head of 40 feet and a stress of 33,000 pounds per square inch.

27. Pressure Conduit. - The 5.5-foot-diameter pressure conduit mentioned in section 25 extends from the intake structure to approximately station 4+68.00. The conduit is about 208 feet long and is divided into five 28-foot sections and one 36.5-foot section, connected by 4.5-foot closure sections. Each of the six sections is provided with a cutoff collar. A reach of the conduit is shown in figure 20.

[graphic]

Figure 20.--Pressure conduit of canal outlet works. Workmen are compacting backfill adjacent to conduit. 328-701-3295, November 23, 1951.

-

(a) Loadings. In the design of the pressure conduit, vertical loads were considered equal to the weight of the embankment above the centerline and distributed uniformly. Lateral loads were assumed to have a trapezoidal distribution and be equal to one-third of the vertical load at any elevation. The following loading conditions were investigated:

(1) Embankment saturated to phreatic line for normal reservoir water surface elevation; conduit empty.

(2) Embankment saturated to phreatic line for normal reservoir water surface elevation; conduit filled with water and reservoir water surface at elevation 2785.0.

[graphic][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][merged small][subsumed][subsumed][subsumed][ocr errors][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][merged small][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][merged small][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][merged small][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][merged small][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][graphic][merged small][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][merged small][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][ocr errors][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed]

Figure 21. --Canal outlet works--Gate chambers and stilling well details.
(Sheet 1 of 2.) From drawing 328-D-951.

« PreviousContinue »