US1138394A

US1138394A - Reservoir and tank.

Info

Publication number: US1138394A
Application number: US64935211A
Authority: US
Inventors: William Mueser
Original assignee: Individual
Current assignee: Individual
Priority date: 1911-09-14
Filing date: 1911-09-14
Publication date: 1915-05-04
Anticipated expiration: 1932-05-04

Description

VVx MUESER.

RESERWm AND TANK. .n.PPLlc/.UIGN HLED sEPT.14.-191|-,

latened May LL, 1915.

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Specification of Letters Patent.

llatented May el, ti.

application filed September le, 1911. Seria-.1 No. 649,352.

Be it known that I, WiLLiAM Monsun, va

v citizen of the United States, residing in the borough of Bronx, in the vcounty of New .orln city' and State of New York, have in- 'vented certain new and Vuseful lmprove- L0 cation of a principle not heretofore used in tank and reservoir design, the constructionYV of tanks and reservoirs in accordancel with this new principle and the 'adoption of the various details resultingfrom the novel construction as -is hereinafter pointed out.

Small circular tanks, as built heretofore, have given little trouble, as an ample amount of material could readily be used in the bottom and Wall of the tank to take care of the stresses developed by the Weight of the fluid stored in the tank, although this result has only been attained by a wasteful use of material.

Large circular tanks, both of steel and re- '25 iniiorced concrete have frequently failed, and

are always leaking, usually in the lower part orn1 the circular Wall. 4lhis is due to their construction being faulty both in principle and detail. The larger the tank the more serious have been these defects, and the greater the Waste of material used in trying .to overcome the defects. A

lt has been the practice to make the bottoni and the circular Wall oi' tanks, reservoirs or standpipes integral, rznly fastened together, and the larger the tank the greater' have been the precautions taken to tie, rivet or bond these two elements together.

My invention provides .that the circular e0 Wall shallinot be united or fastened to the not been solved.

While this invention necessarily also re-y lates to tanks and reservoirs of steel con- \struction, its importance becomes most evident and it is most readily described in connection with a lcircular"reinforced concrete tank or standpipe of magnitude.

Assuming a circular reinforced concrete tank to be 125 reet in diameter and 50 feet high, filled With Water: Thewater pressure at the bottoni of the about 50 6a5=3125 pounds per square foot; therefore, the tension in the circular Wall for one foot of height Would be w 195,312 pounds.

It is usual to embed rings of steel bars in the concrete Wall to take care of this tension. Allowing a tensile stress of 20,000 pounds per'square inch of steel, it Would require almost 10 4square inches of steel .to reinforce the circular Wall nearv the bottom for a. height of one foot. Since allmaterials are elastic,and elongatewhen subjected to tension, the steel bars will also elongate when under tensile stress. ticity of" steel is approximately 30,000,000# pounds, and the circular length of each steel bar in a tank 125 feet in diameter, is about 393 feet, and therefore the elongation of each steel bar ring under a stress of 20,000# per square inch will be aesxzacooxiz 30,000,000

This increase in length ofthe steel bar ring, corresponds to an increase in diameter of the ring of or in other Words, it is necessary for, the steel bar ring to increase its diameter from 125k feet to 125 feet and l inch, in order to 3.144` inches.

mail,

circular tank would bek The modulus of elas be strained to the extent of 20,000 pounds Weight on it and its friction on foundations, y

then the circular Wall Will be shorn off the' bottom in its effort to increase the diameter. l

My invention recognizes these facts by making bottoni and wall independent of each other. The bottom sustains the vertical` pressure and does not 'have to expand, the circular wall sustains the horizontal pressure and is allowed to expand and contract in accordance .with the pressure exerted. The construction details to waterproof the joint between bottom and wall and to facil1- tate the sliding of the wall on the bottom by reducing the friction between the two to a Aminimum are of minor importance and may be varied without departing from the spirit of the invention.

In the drawings Figure 1 is a vertical sec tion of a part of the bottom and circular Wall of a reinforced concrete tank of mag- 'nitude embodying my invention and showing a number of construction details designed to water roof not only the joint between wall and E bottom themselves, and Fig. 2 is a horizontal section through the same on the plane of the line 2-2 in Fig. 1 and a top plan view of the parts beneath such plane. Fig. 3 is a view in miniature and in elevation of the complete structure. Fig. 4 is a view similar to Fig. 1 of a simplified form of construction embodying my invention; and Fig. 5 is an enlarged detail in vertical section of one end of the base and the foot of the wall. l j

In the drawings 10 is the bottom or base of the tank made of concrete and reinforced by radial bars 11, and circular bars 12 placed at appropriate intervals in accordance with the strains they are intended to meet. At its .outeredge the bottom is increased both in superficial and cross sectional area to form a supplemental extension annulus 13 to support the additional 4weight due to the wall of theitank, and 'this isreinforced by radial bars 14 and circular bars 15 if required.

20 is the circular wall preferably tapering O,from the bottom toward the top and reinforced by circular bars 21 arranged at gradually increasing intervals. L-beams 22 or similar elements of construction are placed I at suitable intervals around the wall in oi'- der to give it rigidity to support the bars 21 and to distribute possible shearing stresses in the wall itself. This wall 20 rests upon the bottom 10 merely by gravity. As it will move with respect to the supplemental extension annulus 13 on which it directly rests when subjected to Ithe horizontal pressure of the water, anvantifriction element may be placedr between the two contacting surfaces, for; instance, two plates of metal, a lowerplate23v in the wall and an upper 'plate 16 inthe' annulus. The constructionwhich Iprefe'r, however, ,is to insert between c these contacting surfaces a layer of relatively .soft-material, for; instance, oiled paper or tarred felmnhichwill be somewhat readily abraded or sheared lso that'lit will coinpletelje fill any crevices'zwhich may exist in ottom but also the wall and these surfaces and serve as a water seal be tween them. The relative movement 'of y.these surfaces is slight and necessarily slow and this layer need not be very thick or very large. The upper surface of the bottom is provided with a layer of suitable waterproofing material 17, for instance, asphalt, and above that there is arranged a lining 18 of any suitable material. A similar sheath 24 of water-proofing is placed against the inner surface of the circular wall 202 and this is likewise provided with a suitable lining 25. In order to allow for expansion and contraction this lining is made ibn sec# tions, and joints 26 are arranged between these sections, and these may likewise be filled with waterproofing, if desired.

In order to provide for a maximum amount of movement between the bottom of the tank and the circular wall and to insure still further the waterproofing of the joint, the bottom is sloped inwardly at 19 leaving a wedge-shaped depression or gutter between such slope and the lower 'innersurfacc This depression is of the circular wall. preferably filled with an elastic plastic material, like coal tar pitch, indicated at 30.' This should be applied when hot so that it will be thin and ill every crevice in either surface. An elastic waterseal is thus formed between the bottom and the circular wall.. AIf the material of which this seal is composed should deteriorate in time at places 1t can at such places .be readily renewed at any convenient time when the tank is empty without in the least interfering with the construction of the tank. It is So arranged vthat the greater the water pressure, the

.but any other desirable means` for lmaking the joint water-tight may be used.

In embodying the invention various forms of construction may be employed, andthe details may be varied within wide limits without departing from the said invention. The invention is also applicable to tanks and reservoirs made'of steel, concrete and various other material.

What I claim as new is:-

1. A tank orl reservoir for luent'material, comprising a bottom and a continuous upstanding conning wall mounted on 'the ,bot-

tom, the lower edge of said wall bein Aslidable upon the bottom to permit tlievfexpansion Vand contraction of said wall, lwithout injuring it and said bottom, and anti-fricshoulder of the bottom.

v 3. A tank or reservoir for fluent material,

:comprising a bottom having a shoulder and a continuous upstanding conlining wall mounted on the bottom alongside the shoulder, the lower edge of said wall being movlable upon the bottom to permit of its expan- 4sion and contraction without injuring it or said bottom,

I a seal of substantially perma- I'iently plastic material interposed between ,-lth'e inner face of the side wall and the shoulderof the bottom, and anti-friction members .interposed between the lower edge of he wall and bottom.

A tank or reservoir for fluent material,

comprising a bottom of cementitious mate- A rial anda continuous upstandmg confining .wall of cementitious material mounted on -.l the'bottom, the lower edgeof said wall being i slidable uponv the bottom to permit the eX- pansion and contraction thereof without injuring it or said bottom, said bottom fur,

ed on the bottom,

the movement of the wall on the `thermore having an upstanding continuous shoulder Jarranged within the conlinlng Wall and spaced therefrom, antifriction plates interposed between the lower edge of the wall and the upper face of the bottom, and a seal of pitch-1ike material interposed between the shoulder of the bottom and the inner face of -the wall.

5. A tankor reservoir for fluent material,

comprising a bottom, a separate wall mounted on the bottom, and a joint between the wall andbottom, includingmeans to facilitate the movement of the wall on the bottom.

6. A tank or reservoir for fluent material, comprising a bottom, a separate Wall mounta joint between the wall including means that facilitates bottom, and a liquid-proofing seal interposed between the bottom and wall.

and bottom,

7. Atank or reservoir for iuent material, j

comprising a bottom, a substantially cylindrical confining,` wall mounted on the bot.- tom, a joint between the lower end of the wall and bottom, including means that facilitatesgthekmovement of the wall on the bottomatall-points, and means for maintaining the `oint sealed irrespective of the movement oithe wall.

Intestimony whereof affix my signature in presence of Vtwo witnesses.

' 5*-, l Y. WLLIAM MUESER. Witnesses: f5. 1Cor, l

l ALAN C. McDoN-NELL.