US951668A - Pile. - Google Patents

Description

L. E. WELSH.

PILE. APPLIGATIUN FILED renzo. 190e.

amnted Ma?. 8, ww.

SHEETS-SHEET 1.

T. WELSH.

PILE.

APPLIGATIOH $11.21 Emma, 1999.

Pa-@ma may.: 8, 1910.

2 EHBETS-SHEET 2.

Oui

.af "iirrr oriiigoit.

LOUIS E. WELSH, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOB, BY DIRECT AND MESNE ASSIGNMENTS, TO AMERICAN CON CRETE PlLING COMPANY, OF PHILADEL- PHIA, PENNSYLVANIA; A CORPORATION OF JERSEY.

PILE.

Specification of Letters Patent.

Patented Mar. 8, 1910.

Application filed February 20, 1909. Serial Nrn 479,143.

'my invention to so construct a pile that it will carry a greater load than concrete )iles of the ordinary construction, and this o ject I attain by toriniii a series of shoulders on the pile which wil bear upon the earth at different points, thus materially increasing what may be termed the sui-,face friction.

'lhe pile is particularly adapted-for use in ground which ha an ,under ;-.trata of quiclrsand and where it is desirable to ntilize the upper strata to support the pile.

In the accompanying drawings Figure l, is a view in elevation of one form of my improved pile, the shoulders being formed hf.' a series of corrugations; Fig. E. is a Similai' Yview to Fig. l, showing the Shoulders in the forni of a spiral; Fig. 3, 'is a sectional view showing the first step in innerting a pile of in v improved construction into the ground; Fig. et, is a sectional View showing the second step in the process; Fig. 5, is n sectional view showin the completed pille within the ground; lig. 6, is a sectional' view Showing a modification of the' form of corrugatione; Fig. 7, is a view of another modification; Fig. 3, is a View showingth'e corrugatione toi-ined in a. tubularconerete pile, Fig. 9, is a view showing a modifica tion ot the shell illustrated in Fig. S: Fie:A

i v h 10. is a view showing;f a. inodilication of the method of; driving the vpile into the ground; and Fig. l1, is a view showing only a portion of the pile corrugated.

Al-lcretofore concrete piles have usually heen made with a smooth surface and of even diameter throughout their length, or have heen inailc with a smooth surface and tapered. These are the two forme ot piles now in common use.

Referring to the drawings A is the body portion of a concrete pile havingIr a series-of ribs rf alternating with grooves n; the rihn.'

as illustrated in Fig. Y1. being ot annular forni, but in some instances they may be in the form of a spiral, as illustrated in Fig.

2, without departing from the essential features of the invention.

Y B is the point. of the pile which, in the present instance as illustrated in Fig. l, consists of a metallic-sectlon B and a concrete section B2; the metallic point in this instance being hollow and the concrte of the pile ex 50 tending through the hollow section nd forming the ext-reine lower end of the pile. In Fig. 2,' I have illustrated a solid point B3.

1`hc.corrugations in Fig. l, ane formed in a curve having the same contour throughout,

but they may be formed as shown in Fig. '6, in which the lower edge of the rib o can be abrupt, as shown at a, or they may be. formed as at a, Fig. 7 'having square corners instead of round corners as shown in 7o F ig. l. The shape of the ribs may be modified in man)1 ways Without departing from the essential features ot the invention.

In order to properly insert such a pile into the ground l use the device clearly illustrated in Fig. 3. B is the point, B is the outer ring Section and C is the inner section of the point having,T a flange o restino' on a shoulder o on the ring section B', as i ustrated in the application for patent tiled by me on the 29th day of December 1908, un der Serial No. 469,834. Attached to this,- inner section (l in the present instance is a tubular driving fornrv l), this forni 'is screw threaded at its lower end and adapted to a screw thread on ari-extension c on the inner Section of the point B. E ie-the driving head grooved at c to receive the upper end of the driving form D and surrounding this' driving forni is a protectiu7 casing F rest- 90 ing on a shoulder b and lie in central p0- sition by a flange b2 on the ring B in the present instance, and this protcting casing is adapted to a groove e in the head E.

Mounted between the driving form D and 95 the casing F, as illustrated in Fig. 3, is a corrugated tube/I and this tube can be made of ordinary corrugated sheet. inetal bent into form and riveted, or may he made in tubular form in the first instaure if desired, or instead of beingof i'forrnijated sheet metal this Section may he inade as Iehoun at I', Fig. S. ofa concrete Shell having a corrugated outer face The corrugationii may be inside as shown in Fi to any torni desired. Then this corrugated 8 or 9. or mayl bcinoditied 105 section is placed infposition between the driving form D and the casing F the pile is driven in the .ordinary manner and whenV driven to the depth desired .the- 'driving Aforinl with the central-sectionCof the'point, in the present instance, is removed leaving-the interiorzoif` the cor-ru at'ed'shellA exposed, anl

inspection can then e madez throughoutthe entire length-of the pile, or, onlarge piles, the earth under the pile canbedug 'out and properly-preparedl to receive the 4 concrete as desired, andthen a concrete filling is placed n the pile, 4.as indicated Ain Fig. 4, after wiiih one pile after another isdriven, the earth is packedti litlyl against the concrete pile and the -eart undereeachnorr'u ation" adds its support to the entire' ile, 'ma ng a Vvery substantial-support forth ing capacity.

It will be readilyun erstoodthat the concrete shells shown. in Figs. 8 or. 9 may be used in place of theV corrugated metal sections, and that these concrete shells' may be reinforced with metal embedded in the conway or at the top, depending upon the characterl ofearth into which the` crete' and' when Vsuchaforin is' used as in Fig. 9, I (prefer to make the reinforce also corrugate so as to add, materially to the strength ol the structure.

The body of the pile maybe reinforced and drive entirely by the' outer f orm, or casingF, as illustrated in'Fig. 10. In this con'- struction the point lsection is made solid and -the seat fori-the driving casing F is of sufficient width to receive the said casing and the corrugated tube may rest within the flange onthe point section, so that the driv ing casing-is eid firmly between the point and the head.

In some instances the pile may also be corrugated for a portion' ofits length, as in Fig. 11,--.a- Udcthemcorru ated 'portion may be at the lower end, as s own in Fig. l1, or midlconsiderably While I 'prefer to introduce the corrugated tubular shell into the 'ground at the [saine time therhole is bein lornied to receive the pile, the shell may introduced intothe ole after it is formed without departing from the essential features of the invention.

While it isfnot absolutely essential to'have' the point of greater diameter than the protecting casing, I prefer to' make it larger' .so as to avoid as much as possible the skin friction in driving the pile. into the ground,

the point secand .furthermore by making am enabled to tion larger than the casing more readily withdraw the casing after the pile has reached the depth required.

e outer casing F can be removed,- leavin theearth to come in direct contact with t e corrugations of the pile, and, when' e pile and increasf therein.

1n any m anner desirable, and-iii some in-` stances'I may dispense'with the inner form l. The process herein described'of intro ducing` a corrugated tube into the ground, said process consisting in providing a substantially smooth-surfaced tubular element forming a combined driving formand protective casing with a point section, mountin within said driving elementa corrugate tubular shell, forcing said driving element by impact to forma hole in 'the ground and simultaneously introducing the tubular shell therein, and then withdrawing the protective driving eleinent and leaving the point section and corrugated shell within tli'e `ground.

: 2. The Aprocessherein 'described of introlf `ducing a corrugated tube `into the ground,

said rocess consisting in providing a driv ing 'orm and a substantially smooth-surfaced protective casing with a p oint section, mounting a corrugate tubular shell between the protective casing and the driving form, forcing said driving form and casin by impact to form a hole Jin the ground'an simultaneously 3. The process herein described of lforinintroducing the tubular shell ing a corrugated concrete pile, said process form so as to ex o se the.

ground with the- 4. The process herein described of forming a corrugated concrete pile in the ground,

said process consistin in providing a sub#- stantially.- smooth-sur aced tubular element forming a combined driving form and protective casin in tiiular shell,' forcing said driving element 'by impact to form a hole in the ground and simultaneously introducing the tubular shell therein, 'filling said corrugated shell with concrete, and then withdrawing the protective driving element and leaving the point section and coi'ru ated shell within the ground ywith the bo yportion of concrete.

In testimony whereof, I have signed my naine to this specification, in the presence of two subscribing Witnesses.

Louis E.

Witnesses:

Jos. H. KLniN, IVM. A. BARR.-

with a point Section, mountf, within said'drving element a corrugated

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