US878291A

US878291A - Shell-dam.

Info

Publication number: US878291A
Application number: US39835507A
Authority: US
Inventors: Edwin B Jennings
Original assignee: Individual
Current assignee: Individual
Priority date: 1907-10-21
Filing date: 1907-10-21
Publication date: 1908-02-04
Anticipated expiration: 1925-02-04

Description

180.878,291. PATBNTED PEB. 4, 1808.

E. B. JBNNINGS.

APPLICATION FILED 00T.2l.1907.

4 0 of the ground line ofthe inclined Walls and UNITED STATES,

EDWIN B. JENNrNes,

PATENT OFFICE;

OFNEW Yoan, N. Y.

" snnLa naiifr.-

Application filed Oct Specification of Letters Pateiit.

@bei 2 1. 1907. smaila. 398.356.

Patented Feb. 4, 1eo8..

. 'tres'sl piers; they. are formed integral vvith said buttress piers and are'aiched between andvtransversely'of the lines of the buttress piers and towandtheimpounded Water, the arches being sprunof from thecen'ters of the buttress piers as will be a arent frorn F ig. 2. In the buttress piers provide series of cavitiesv 2 vertically disposed and slightly inclined and in'the inclined walls I provide other series of cavities 3 longitudinally disposed between the outer and inner surfaces of said inclinedwalls and running longieffecting economy of .materials Without Vthe .v sacrifice of eflieiency.

i5 a series ot buttress piers set parallel with .one

'- yanother ands aced apartasuitable and prez'leterniinedV distance; andA inclined Walls formed,integrally-.therewith and` arched lie-: vtween Aan `,tr`ansversely of the (lines of the :buttress' -iers and toward vthe,impounded vWater. ithin'these v valls I provide series- -Of lo itudinally disposed circular cavities" and lWithin the buttress piers I provide series lof vertically .disposedandfslightly inclinedl circular cavities which reduce the amount of I t t I tudinally, that is,`fro rn near t-he foot to near n n carrying ou my inven ion, provi( e the amount of material employed and the Weight of the buttress piers and Walls without detracting from the strengthoi' the 'saine-or the rigidity'of the structureand'they further :make it possible to employ a thicker wall y and thicker buttress piers. These cavities in.- 1 cross section are ofcirc'ular configuration and ypreferably of elliptical configuration as shown` in the drawing, althou h I do not limit myself' in this respect.. f hess .cavities are of 50 llarger' areanear the foot of thewwalls and f .the topof the walls'.4 These cavities reduce material efmloyed and the weight without detracting om the strength or rigidity. 'This-construction'permits of athicker wall ndthicker'buttress piers and consequentlyl ac d greater area o i foundation bearing. The form of' theunder earth or rock foundation, the mann-er of connecting the Walls and.' buttresses thereto, or .the angle 'of inclination of .the wall br oppositeedge of the 'hut'tress piers forms no part of my invention., jA .Inth'e drawing, Figure 1 isa vertical cross vsection .andpartial elevation at the dotted line F' 2. Fig.` 2 is a horizontal seo. tion at thelotted line y, y, Fig'. 1, andpla'ny buttress'piers, 'and Fig. Bis a vertical' section L in fsmallersizao'f one buttress pier, at the- `dotted line z, e, Fig; 1. Inthe drawing, a represents the `earth or` rock bed which is to :be 'suitably excavated to 'any desired depth and ,also in any desired 'marinai-.for a suitable `foundation a1` upon W'hichthe buttress' piers l) and the inclinedvinte al `Walls c are tolle; rected and .by whic they are to. be su portd.. I

The buttress piers rareof theA desired -thickness. and set -parallel to one another `'where the shell dam is to be in' lineand'they Ire suitably spaced apart at a .predeter-' butt-rasees and contract in area toward the ltop of the Wallsand buttresses. ',The buttresses are preferably Wider at the lower parts `near their 'foundations than at the 'top as shown in Fig. 3, on account of the increased bearing thereby. provided, but I do notlimit my invention -in this respect. From Fig. 2 it will be noticed that the outer up stream surfaces of the arched walls c' are formed on a greater radius than are the .inner surfaces 'hetweenthe buttresses ,with the result that the Wallarches are thinn/est at the center and thickest at the buttresses, l.thus strengthening and stifening the .arches Without sacrifice oie-material: The. el iptical conguratienof-the cavities which in any cross section taken thereofresents the form 4 of an arch strengthens the s ell between said f cavities and the 'outer surfaces; the arch hav- 100 inga tendencyto prevent a pressing strain.' Furthermorethis form of construction in 4sures'a greaterarea of foundation bearing, making ltmore difiicu t to uri-seat the shell dani than would he the case if the foundation vand Walls were narrower. In both thebuttress piers and the inclined Walls the elliptical cavities in their longest dimensions are lparallel with the central line of buttress piers 0r Walls),4 therefore making it possible to use a $110 medium sizeofwall rather than an extensive mined distance, and the inclined walls c extd'aloag'eorresponding edges of the but- Wall, which would be necessaryif the cavities were turdo that their longest diameters Were at right angles to the line of the pieis orY walls. I do not limit myself to the proximity or number of these' elliptical cavities nor to the kind or character of foundation employed for the shell darn, nor to the inclination of the' wallsr or buttress piers. I further do not limit myself to constructing the shell dam accordingtdiny invention of plain or rein'- forced concrete, but I prefer to construct the buttress piers and the inclined walls so that they are integral.

I claim as my invention: y

1. A shell dam comprising' a seriesI of buttress piers suitably spaced apart and inclined walls along one edge of said iers formed integrally'rtherewith and arche between and transversely 'of the lines of the buttress piers and toward the impounded Water, said buttress piers and inclined Walls being constructed vwith series of circular cavities therein.

y 2. A shell dam comprising a series of buttress piers set arallel and spaced apart at a predeterminer distance and inclined walls arched between and transversely on the lines of the buttress piers and toward the ini-l pounded Water, with the arches sprung from the center of the buttress piers, the saidV buttress piersbeing each formed with series of elliptical cavities therein parallel with the outer edge of the buttress piers and the inclined walls formed with elliptical cavities therein in series running lengthwise from near the foot to near the top 'of the walls and all of said elliptical cavities arranged with the longest axis 1n line with the centers of the Walls and piers.

3. A shell dani comprising a series of buttress piers set parallel and spaced apart at a predetermined distance and incline'd walls arched between and transversely on the lines of the buttress piers and toward the impounded Water, with the arches sprung from the center of the buttress piers, the said buttress piers being each formed with series of elliptical cavities therein parallel with the outer vedge of the buttress piers and. the in- .clined walls formed with circular cavities therein in series running lengthwise' froml near the foot to near the top of the walls.

4. A shell dam comprising a series of-buttress piers suitably spaced apart and inclined Walls along one edge of said iers formed integrally therewith and arche be'- tween and transversely of the lines of the buttress piers and toward the impounded water,v saidv buttress piers and inclined Walls' being constructed with series :of circular cavities therein and the buttress piers being widerv at their lower foot portions than at the to I5. A shell dam comprising a series of buttress piers suitably spaced apart and inclined Walls along one edge of said piers formed in- `tegrally therewith and arched 4between and tress piers suitably spaced apart and in'-y clined Walls along one edge of said iers formed integrally therewith and arche be tween and transversely of the lines of' the .buttress piers and toward the impounded` water, the outer up stream surfaces of the arched walls being formed on a greater radius than are the inner surfaces between the- A.

buttresses; whereby the arches thinnest at the centers are, increased in thickness at the ends joining into the buttress piers, and said buttress piers and inclined walls being constructed with series of circular cavities therein.

Signed by me this 14th day: of October,

IVitnesses:

GEO. T.. PINCKNEY, E. ZACHARIASEN.

EDWIN B. JENNiNGs.