IL29212A

IL29212A - Large tanks and method of erection thereof

Info

Publication number: IL29212A
Application number: IL29212A
Authority: IL
Original assignee: Sircovich O
Priority date: 1967-12-25
Filing date: 1967-12-25
Publication date: 1971-04-28
Also published as: US3577692A

Description

s N Π 24 D 1 Π Ί D D D i D D e Π Π 0 9 TANKS AND METHOD OP ERECTION THEREOF ABSTRACT OF THE DISCLOSURE A concrete tank comprises a bottom a plurality of inner and outer vertical columns arranged in circular arrays with each inner column spaced between and tied to a pair of outer a plurality of wall panels each spanning one of the inner and one of the outer and restraining preferably two or more applied around all the outer columns for restraining their outward movements According to a preferred method of erecting the tank and for introducing prestressing a temporary structure is provided at the center and pulls inwardly on the inner columns before the restraining cables are applied to the outer BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a tank particularly of and also to a method of erecting and prestressing the The tank structure and method are particularly applicable with respect to the construction of large concrete water Description of the Prior Large concrete particularly for use as water have been mainly made of concrete cast in The tank so produced is thus permanent and cannot be distnanteled and erected at another In the time required for producing such a tank is and the cost such a tank construction is very rigid and therefore may develop unforseen stresses producing Large concrete tanks have also been produced by using prefabricated but as a rule they were secured together by permanent and rigid connec SUMMARY OF THE PRESENT INVENTION The present invention provides a tank structure which uses prefabricated concrete elements assembled together in a manner enabling the tank structure to be quickly erected if need arises dismantled as and which structure so that it can accommodate changes in stress minimizing the developing of According to the present there is provided a tank structure comprising a bottom a group of outer and a group of inner vertical columns each arranged in a circular array the inner columns staggered between the outer and with each inner column tied between a pair of outer a plurality of wall panels each spanning the distance between one of the inner and one of the outer vertical tying means for tying each of the inner columns to the pair of outer columns disposed on its opposite and restraining means applied around all the outer vertical column for restraining their outward The Invention also provides a preferred method for erecting such a tank structure in which a temporary auxiliary structure is disposed in the center of the circular arrays of the The inner columns are connected to the auxiliary and the latter is then caused to exert a pull on the connected moving as well as the other group of columns and the panels between The restraining elements are then applied around all the outer columns and the temporary auxiliary structure is Further features and advantages of the invention will be apparent from the description BRIEF DESCRIPTION OF THE DRAWINGS The present is herein somewhat diagrammatically and by way of example with reference to the accompanying whereinι 1 is a top plan view of a tank structure conetructed in accordance with the present 2 is a sectional view along lines of is a view similar to but along lines of 1 and also showing the temporary auxiliary structure used in erecting the and and 5 illustrate constructional details on an enlarged OF THE PREFERRED EMBODIMENT The tank structure illustrated in the drawings comprises a bottom slab 1 of which may be cast in situ or and which may have an upturned 2 at its periphery On this bottom slab are erected a plurality of upright or vertical concrete columns arranged in two circular arrays forming concentric namely an outer circular array of columns 3 and an inner circular columns The inner columns are disposed slightly inwardly in relation to the outer columns 3 and at points which are between two outer columns Concrete each of a dimension to span the distance between one of the inner and one of the outer vertical columns 3 and are then placed between the latter columns so that the vertical edges of these panels contact the latter Each of the inner columns by a plurality of steel cables 7 fastened to elements 7 embedded in or secured to the to the two neighboring outer columns 3 between which it is In the preferred method of erecting the the foregoing elements are supported A temporary auxiliary structure 6 erected in the center of the circular arrays of the and radial connecting elements 5 such as rigid rods or flexible steel are connected between the temporary structure 6 and the inner columns The radial connecting elements 5 are applied at different levels and at different angles between the temporary structure 6 and the inner columns as shown in The temporary structure 6 is then caused to exert an Inward pull on all the inner columns which displaces the latter columns and since these columns are tied by elements 7 to the columns the latter also move This action also slightly displaces the panels 8 and presses them tightly against the edges of the spanned inner and outer Restraining elements preferably two or more steel are then disposed around the outer columns and the temporary structure 6 together with the radial connecting elements 5 are As shown in the temporary structure 6 may merely be another vertical column supported on a member 10 which is actuated to cause the structure 6 to exert an inward pull on inner columns A of procedures may be used for causing structure 6 to exert this inward For in one procedure member 10 may be a jack which is operated to cause the structure 6 to be whereby inner columns are pulled inwardly by means of the connecting elements This is a preferable procedure since the lifting of the structure which changes the angle of the connecting elements 5 causing the latter to exert the radial pull inwardly on the inner columns also produces a vertical component of force acting an upward direction on columns thereby reducing the friction with the bottom slab 1 so that the inward sliding of the columns occurs more Another possible procedure is to use for supporting member 10 a member which is rotated or winding part of the connecting elements wire around the structure 6 and thereby pulling the inner columns As shown in and 5 the contacting edges of columns 3 and with panels 8 are preferably rounded so that the points of contact are whereby the forces exerted by the when the tank is or by the cables 9 the opposite will result in a very high local pressure along the contacting providing a high degree of If necessary or seals 12 may be applied at the Juncture between the vertical columns 3 and t and the wall panels In seals may also be placed on the bottom slab 1 at the thereof with the vertical columns 3 and and of the wall panels It will be appreciated that the foregoing tank structure may be produced at a relatively low and may be quickly erected and dismantled as may be It will also be seen that this structure is and therefore can accommodate changes in stress minimizing the developing of For when the tank is filled with an outward pressure will be applied causing these elements to move slightly and when the water is drained from the these elements will move slightly inwardly under the urge of the cables 2 In some it may be desired to apply an force on the columns after the restraining cables are put into This can be done by using the temporary structure 6 the connecting elements but the latter would of course have to be rods or columns 3 and and the panels may each consist of a plurality of prefabricated elements placed one on top of the other until the total height of the structure is A roof may also be the panels need not be but may be shaped as The tank may be used for granular material instead of Other modifications and applications will be insufficientOCRQuality

Claims

P.A, 2 212 2 WHAT IS CLAIMED ISi

1. A tank structure, comprising a bottom slab, an outer group of vertical columns arranged in a circular array around said bottom slab, an inner group of vertical columns arranged in a circular array around said bottom slab with each disposed inwardly of said outer columns and between a pair of them, a plurality of wall panels each spanning the distance between and contacting the edges of one of said inner and one of said outer vertical columns, typin means tyj&ng each of said inner vertical columns to the pair of outer vertical columns disposed on opposite sides thereof, and restraining means applied around all said outer vertical columns restraining outward movement thereof.

2« A tank structure as defined in Claim 1, wherein said typing means comprises a cable secured between each of said inner vertical columns and the pair of outer vertical columns disposed on opposite sides thereof.

3· A tank structure as defined in Claim 1, wherein said restraining means comprises at least two vertically-spaced cables disposed around said outer vertical columns.

A tank structure as defined in Claim 1, further including seals at the junctures between said bottom slab and all said vertical columns and wall panels. 5· A tank structure as defined in Claim 1, further including seals at the Junc u e between said

vertical columns and said wall panels.

6. A tank structure as defined in Claim 1, wherein all said vertical columns and wall panels are o

concrete.

7. A method of erecting a tank structure comprising* disposing an outer group of vertical columns in a circular array and an inner group of vertical

columns in a circular array with each of the inner columns located, inwardly of the o¾¾er columns and between a pair of them, disposing a plurality of wall panels each spanning the distance between one of the inner and one of the outer vertical columns and each of the inner vertical columns tied to the pair of outer vertical columns disposed on opposite sides thereof; erecting a temporary auxiliary

structure in the center o the circular arrays;

connecting all the vertical columns of one of said groups to said temporary auxiliary structure by

means of radial connecting elements; causing said temporary auxiliary structure to exert a pull on all said connected vertical columns , displacing them, as well as the other group of vertical columns and wall panels, radially inwardly), disposing oa*** restraining means around all the outer group of vertical columns and in contact therewith; and removing said temporary auxiliary structure.

8. Die method as defined in Claim 7, wherein said radial connecting elements are connected to the inner group of vertical columns.

9* The method according to Claim 7» wherein said

P.A. 29212/2

radial connecting elements are applied at different levels and at different angles between said temporary auxiliary structur and said connected vertical columns.

10. The method as defined in Claim 7* wherein said pull is exerted by raising said temporary auxiliary structure.

COHEN ZEDEK & SPISBACH

Attorneys for Applicant.