US2389057A - Reinforced concrete tank - Google Patents

Description

Nav. 13, 1945. c. KAND'ALL I REINFORCED CONCRETE TANK Filed Aug. 17,v 1945 BY /y@ ATTORNEY Patented Nov. 13, 1945 UNITED STATES PATENT OFFICE REINFORCED CONCRETE TANK Charles Kandall, New York, N. Y. Application Aug-ust 17, 1943, seria1N0;4e9,011

16 Claims.

This invention relates to reinforced concrete tanks such as settling tanks or aeration tanks for sewage treatment or the purification of water and for similar purposes.

Such tanks were heretofore constructed with a single division wall separating the adjacent tanks. Provision for expansion of the floor slab, due to changes in temperature was made by expansion joints in the slab within the tanks. The expansion joints split the tanks longitudinally. In such construction the oor slabs consisted of a series of cantilevers. A portion of the floor slab between the free end at the expansion joint and a vertical wall acts as a cantilever and its construction is less economical than a slab supported at both ends.

When one side of the division wall is empty and the other side full, tension is developed on one face of the slab and Wall. When the condition is reversed and the first side is full and the other side empty, the tension is on the opposite face of the slab and wall. This condition requires reinforcing steel in the top and bottom of the slab and on both sides of the wall.

Furthermore the split in the floor slabs weakened the construction, and there was always the likelihood of leaks into and out of the tanks at the expansion joints.

In tank construction as heretofore practiced, if one side of the expansion joint settles more than the other side, a complete rupture might result.

It is therefore an object of the present invention to provide for the construction of settling tanks or aeration tanks or tanks for similar purposes, in which the expansion joints in the floor slabs within the tanks are eliminated by the use of walls between adjacent tanks which are split longitudinally so as to form a split wall or double wall permitting expansion of the floor slab, each tank remains an integral whole unit without any split. With such construction there is economy in material and labor as less steel is necessary in the floor slab and less concrete need be used. Furthermore, each tank is a complete unit in itself instead of being two parts with an expansion joint.

It is another object of this invention to provide a highly improved tank construction of the character described which shall save in expansion joint material, including copper water stops, and in which leakage from and into the tank is elime inated, and whichshall be compact and practical and efficient to a high degree in use.

Other objects of this invention will in part be obvious and in part hereinafter pointed out.

' They invention accordingly consistsrn the features of construction, combinations of elements, andY arrangement of parts which will be exemplined in the construction hereinafter described, and of which the scope of application will be indicated in the following claims.'4 A

In thel accompanying drawing, in which is shown various possible illustrative embodiments of this invention,

Fig. 1 is a vertical cross-sectional view through a tank embodying the invention;

Fig.l 2 is a top plan view of the tank;

Fig. 3 is an enlarged, cross-sectional view of one of the division walls and portions of Ithe bottom slabs on opposite sides thereof; and

Fig. 4 is an elevational, cross-sectional Aview through a division wall, illustrating a modified construction.

Referring now in detail to the drawing, I0 designates for the purpose of illustrationV only, a settling tank embodying the invention for use in sewage disposal or water purification works, it being understood that the invention may be applied to aeration or other tanks. The tank I Il comprises end walls II, side walls I-2, a transverse wall I3 parallel to the walls I2 forming a series of tanks on either side thereof, and vertical division walls I4 parallel to the Walls II. The oor slabs. I6 are monolithically 'constructed with said walls.v 'The walls may be formed with usual channelsortroughs I8 inthe top surfaces thereof, and said troughs` may be provided' with openings for weirs I8; I

Inl tanks as heretofore constructed, the oor slabs I6 were split longitudinally within the tank to form expansion joints. Due to such construction the floor slabs had to be made heavy and reinforcing steel was necessary at the top and bottom of the slab. The reason for the necessity for heavy reinforcement was due to the fact that the slabs between the free end at an expansion joint and a division wall acted as a cantilever. The slabs had to be constructed to resist the stresses when a tank on either side' of a division wall was full and the other side empty. For this reason the bottom slabs Von such prior construction necessitated steel reinforcement at the top and at the bottom.

Furthermore the expansionjoints were subject to leakage as each tank was in fact two part tanks. `If one side of the split in such prior constructions settles more than the other side, a complete rupture might. result. In the present construction the expansion joint or split in the oor's'labs lis eliminated.` Instead the division walls I4 are split longitudinally in vertical planes, as at 23 from the bottom upwardly to a point beneath the upper end thereof, thus forming double walls. Expansion in the oor slab is permitted due to the splits 23. With such construction each tank is a complete unit in itself and the tanks are not parts as in prior constructions. Below each division wall there may be a concrete block 22.

Furthermore the floor slabs of the tanks do not act as cantilevers so that there is a saving both in concrete and reinforcing steel. Thus in the present construction reinforcing steel rods need be used only at the top of the oor slabs,

eliminating steel from the bottom of said floor end walls, and bottom slabs, and a vertical divislabs.

It will be further noted that there will be no leakage because the expansion joints are eliminated from the inside of the'tank and there is no likelihood of a tank rupturing in the middle;

There is furthermore a, saving of expansion joint material and the tanks are stronger than yprior constructions.

"In Fig. 4 there is vshown a modified constructionin which the divisionwall Ma is` formed with a split 23 as in tank 15D, but the wall Ill'between the split 23 and the trough or channel I8 is split as at 4t `forming an expansion joint which may be provided with a copper water stop 43.

If desired the tanks may be supported on piles should the character ofthe soil necessitate such construction.

The thickness of the concrete in the door slabs may also be reduced-due to the fact that the expansion joint has slab.

It' will thus be seen that there is provided a device in which the several objectsof; this in'- been eliminatedl in the oor blocks beneath said division walls.

7. A reinforced concrete tank having side and sion wall, said wall being formed with a vertical, longitudinal` dividing space extending to the unders'urfa'ce ofthe tank, and terminating below the upper end of the division wall, the bottom slab of the tank having steel reinforcements at the top only.

8. A multi-tank unit having walls to divide the tank into a plurality of Vindividual tanks, said walls being divided Vmedially thereof to permit expansion 'of the individual tanks.

9. A tank structure ,havingl end and side walls anda bottom slab and' transverse vertical walls, said walls being formed with expansion joints extending to the undersurface of thevbottomV slab vab ventionare achieved, and which is well adapted l to meet the lconditions of practical use.

As various possible embodiments might be made of the above invention, and as various changes might be made in the embodiments above set forth, it is to be understood that all matter herein set forth or showh'in the accompanying drawing is to be interpreted asillustrative and not in a limiting sense.

Having thus described# 'my invention, I claim as new and desire to secure by Letters Patent:

1. A tank structure having side walls and floor slabs and division walls dividingV the structure into a series of tanks, saidV division walls being double and each beihgl formed witha dividing space extending, to the bottom surface of the structure;

' 2. A tankl structure having sidewalls and door slabs andv division walls dividing the structure into a series of tanks, said division wallsbeing double` and each being formed 'with a. dividing space extending to the bottom` surface of the structure. said 'division walls being formed with troughs at their upper ends.

3..A reinforced concrete tank structure.. including a vertica'hintermediate wallto divide the structure into a 'plurality of. tanks, said wallbeing divided fromitslower ejnd upwardlyjto permitexpansi'on of the floor slab of the tank at opposite sides of the division.

14.., A. reinforced concrete tank structurey including z'a.,v.erti c'alE intermediate wall to divide the structure into a plurality of tanks, said wallbeing splitjfrom. itsV lower end. upwardly to permit expansjion injth'e bottom slabof the tanks at oppO-f site .sides of the. split, said wally having anl expansion joint at `its upper end.

whereby the tank ,structurei's divided into a .plurality of individual tanks, expansion of the tanks being permitted at said expansion joints.

10. A tank 'structure having end and 'side walls and a bottom slab and vertical division walls, said division walls comprising double walls' with space between them, said space extending to the undersurface, of the `bottom slabcf the structure whereby the 'structure is divided into a plurality of individual tanks, expansion oi theV tanks being permitted at said spaces. l

l1. A tank structure having endl and'4 side walls and a bottom slab and'division wall, said division wall being a double wal'liwith a spacebetween themextending to the'nndersurface yof the" bottom slab, wherebyV thetankl structure isl divided into a plurality 0fA individual' tanks. `expansion of the tanks being permitted at'rsaid space, said 'vdi'- vision side and end wallsgbeing 'formed with channels in their uppervendi4 l 12. A tank structure having end and side walls and a bottom slab. and division wall, said division wall, being a d'o'uble wall withi auspace, between them extending to the undersu'rface of the bottom slab, whereby the tank structure isgdivicledA into a plurality of individual` tanks,` expansion-,of the tanks being permitted. at said space, said division, side andA end wallsbeing formed'withychannels in their'upper end, `and saidx divisionjwalls having expansion, joints between the 'channels therein and the spaces therein. y ,A

13. A tank structure having sidewalls anctfloor slabs and division` Walls vdividing the structure into a series of' tanks, saidjdivi'sion walls being double and ea'chfbeingformed with a dividing space extending to 'thebottom surface offthe structure,` said dividing. spaces being less in width than the thickness of'saiddivision walls.

14. A reinforced concrete'. tank vstrucimre,4 in,- cludinga vertical, intermediate wall to'divide the structure into plurality Vof tanks.. Said'wall being divided 'from itslowerend `upwardly to Vpermit expansion oi the o'or slab Vof, the tank at opposite sidesV ofthe Ldivision, s 1.id4 Wall .being of' ,unifo'im width.

15. A tank structur-hating efad sidewalls 16. A reinforced concrete tank structure including a vertical intermediate wall to divide the structure into a plurality of tanks, said wall being formed with a space extending from its lower end upwardly to permit expansion in the bottom slab of the tanks at opposite sides of the split, said walls being split above said space, and an expansion joint at said split.

CHARLES KANDALL.

Images