US1742926A - Method of forming piles - Google Patents

Description

Jan. 7, 1930. D. MCG. NEWTON METHD oF FORMING PILES Filed Nov. 2, .1927

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Patented Jan. 7, 1930 UNITED STATES PATENT OFFICE l DONALD MCG. NEWTON, OF MONTCLAIR, NEWy JERSEY, .ASSIGrNOR TO MACARTHUR CONCRETE PILE CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK METHOD or romaine PILES Application led November 2,1927.A Serial No. 230,406.

This invention relates to an improved pile and method of forming the same.

It is an object to provide an article of this character by means of a method which may be readily practiced, the resultant article embodying a strong structure encased in the ground in such manner that a load placed upon the pile will be supported effectually.

A further object of the invention is that of furnishing a pile and an improved method of forming the same, which latter may be practiced economically and by relatively unskilled labor to provide an article which will render effective service for an indefinite period of time.

With these and further objects in mind, reference is had tothe attached drawings wherein there is illustrated one practical embodiment of the invention, and in which:

Figs. l, 2 and 3 are sectional side views of successive steps in the forming of a pile; and

Fig. 4 is a similar view showing the resultant article.

According to the present invention a drivino casinr isV rimaril sunk into the Ground.

b C D This may be accomplished conveniently as in Fig. l by dispos-ing within the casing 5 a core or ram 6, the lower end of which may be tapered as at 7 if desired. The sinking or driving of these elements into the ground is accomplished ordinarily by the use of a. pile driving mechanism which acts upon the upper end of the casing. To this end the core may at its upper end support, or have as an integral part, a driving head 8 against which 'the impelling member of the pile driving mechanism strikes, it being obvious that by means of the core the entrance of earth or foreign matter into the casing is prevented as the latter is sunk. This is aside from the fact that by means of the core the casing is reenforced to prevent any likelihood of damage incident to the strains of driving or sinking the same.

The driving casing has an exterior diameter approximately equal to the diameter which the finished pile is to have and after it has been sunk to the proper depth the core or ram is removed, as has been shown in Fig. 2. Thereupon there is introduced into the casing a permanent casing 9 which is filled, as has been indicated at 10 in Fig. .3, witha concrete mixture of suitable consis-tency. Obviously, a space will exist between the driving casing and the permanent casing so vthat* the lattermay be introduced freely into the former. This space has been somewhat exaggerated in Fig. 3 for the purpose of illustration. But in any event, this space, aswell as the void created by the withdrawal of the driving casing (hereinafter described) is filled so that there is no possibility of play cominginto existence between the finished ore unit and the supporting medium there- To this end preferably a grout mixture of a somewhat fiuid nature may bejintroducedy into this space. This is capable of accomplishment after` the filling of the ,permanent casing, by either pouring the grout mixture into the spaceexisting between the casings and permitting the same to flow downwardly by gravity, or as has been shown in Fig. `3,

by withdrawing the driving casing fromV around the permanent casing to provide what might be termed a reservoir, filling the latter with amass of grout 1l and thereupon withdrawing the first-named casing, resulting in the grout mixture-flowing into the space extant between the casings and also filling the void left by the withdrawal of the casing 5,

It will be obvious lin this connection that if, d ue to conditions of temperature, consistency of the mixture, smallness of the space existing between the casings, or for any other reasons, the grout mixture does not flow readily as desired, that a head or piston, indicated in dotted lines at 12 in Fig. 3, may bear, either byits own weight or under force, against the :sonv

" l, is laposteY upon 4the pile. .Y V

1t will also be apparent, in this connection, y that the outer layer will key into all irregu*y 1 z5 `Anthistimeit consequently no play can come into existence-- which r the load irrespective of the manner-in lar-ities of the ground, thus serving, to a cerwith core material, partiallywithdrawing the outer casing to provide a reservoir abovethek first casing and the core within the same, filling such reservoir with a similar material and causing the latter to flow through the space existing between. such casings andL into the voids created by the Withdrawal `of the 'Y outer casing, such latter material providing a layer wholly segregated by the inner casing from the core material and in direct material Contact with" pile is disposedand supported. .Y

In testimony whereof I aflix my signature.l

tain extent, to resist vertical strains imposed 1 upon the pile body. This is aside from the fact that the outer layer will yact to protect the permanent casing against corrosion incident to direct contact -with the supporting Vmedium. 'f d will be'appreciated that the configurations 'ofv 'the various elements em-y ployed, and zthespecific texture of the mixtureutilized might be varied in rnumerous respects-according to the finishedpile which is to Vbe produced.v Also', the stepsof the method may be' modified in various aspects 1 without departingA from the spirit ofthe invention. i Thus, among others, the objects specifically aforementioned are accomplished, the specific 85- teachingsof the'invention being as aforestated susceptiblev to numerous changes, without departing vfrom the spirit thereof as defined by-theclaims.V j Y fr y'Ha-ving described my invention, what'I of claim as new and Vdesire to secure by LettersV Patentis:

1. A method of forming apile in which a pair Aof telescoped casings are employed, which includes filling the interior and im? perforat-e lcasing with aceinentmaterial and flowing material of a like character into the space occupied by theV outer casing whilel withdrawing the latter from aroundthe inr'neicasing-and-such latter materialbeingin 50. direct Contact with the ground withinwhich said vile isdisposed and supported.

2,51 he 'method of'forming Qa' pile by "employing a pair oftel'escoped impe-'rfo'rate.cas-V ings, whichincludes Vfilling the inner casing V with acelnent mixture, withdrawing the outer casing while flowing a grout mixture'into the voids left by such withdrawal, such mixtureV thus occupying al position encircling the firstnamed `casing and forming a distinct layer separate from the ycement mixture and in direct contact with the-materialwithin which pile is disposed and supported.

v3. The method of forming a pile by employinga pair of telescoped imperforate casings, which includes filling the inner casing the groundpwithin "which said

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