US1077212A - Coffer-dam. - Google Patents

Description

seras an sion.

NILS I?.y AMBURSEN, GF BROGKL'TE, MASSACESTS, VsSSItil'()R T0 HYDRALIC CONSTRUCTIQN CGMPANY, 0E' BOSTON, MASSACHUSlli-TTSs A 00235.20-

RATION F NE'W JERSEY.

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Specification et Lettersiaten't.

Application led- May-29, 1912, Serial No..700,31. 'Renewed April 3; 1913; Serial. No. 758,713..V

To all whom t concern: l Be it known that I, Nine F. Aiinoizsnn, a citizen of the United States, and resident of Brookline, in the county of Norfolk and State-of Massachusetts, have invented certain new and useful 'Improvements in Coffer-Dams, of which the 'following is a specitication.

This invention has special reference 'to coller-denis built on softl foundations, such as gravel, sand, clay and other earthern niaterials;

The chief object ofthe invention is to increase the stability and decrease-the cost and the time "required in building the dem,

' and at the saine time minimize the risks in building Cotter-dams in relatively large rivers.

A further object is to ,construct a coer darnl without the delays, diiliculty and danger attending the use of scows or boats. y

A further object is to build a coiler-dam which can be removed quickly, to avoid obstruction of the river in case ot floods which may occur during` the construction of aper- \maiient dam, bridge pier, or other structure within the area of acoer-dam;

A further Objectis to build a coller-dani of s'iiilicie'nt` stability and strength to withstand Water pressure and prevent collapse in case of the Water over-topping the darn.

The invention consists in the improvements which I will now proceedto described and claim.

Of the accompanying drawings, forming a part of this specificationf-Figure' represents a top plan view of a coder-dam constructed in accordance with rnyinvention. 2 represents a section on line 22 of Fig. l. Fig. 3 represents a section on line :3 3 of rig. e.

In constructing a complete coller-dam ernbodyine' my invention, when Y the darn is three-sided, as shown by Fig. Land formed to inclose a space bounded atonesideby the river bank or shore 12, I first/drive at the downstream end A of the site of the dam, the commencement of two rows of piles eX- tending lengthwise of the dam, these rows comprising outer or niain pilesl, and inner or brace piles 14. After driving the first four piles I cap the tops of these piles with transverse beams 15, which connect the piles of the inner and outer rows in pairs. each beam connecting a pile of the inner row with a pile of the outer row abreast of it. On tlie raten-tee eases., este.'

transverse beams 15 I place 4longitudinal l. track members, each' preferably 'comprising a beam 1G and an iron track rail 1?, the

track beams 1Gr being preferably detachably secured to the transverse beams 15 by any' suitable means. ,I then mount a pile-driver on tlie'track members, and niove the sameto position to drive succeeding piles 13 and: 14,

these succeeding piles extending the lon'gi# tudiiial rows and being in turncappedbyfa transverse beam 15, after which` the track-is extended and the pile-driver moved aliead to drive two more piles 13 and 14. Tlise operations are-repeated until the'piles 13 and 1li are driven to the op-stream end of the dam, this bei'nggr` indicated bythe refer-` ence character B (Fig. 1).Y

The inner. sides of the piles`13. and 14-are provided with clamps or strut abntments 19, 20, which engage inclined struts 2l extending' from the oiiterto the inner'pile'as shown by Fig. 2. To the outei'sides of tlie outer piles 13 are attachedA longitudinal stringe-rs 2Q, preferably by Usliaped' boltsl 23, embracing the piles 13, as shown by Fig;

-3, and preferably secured by wedges 24. 'The Vstrin ;ers 22 form a backing for a .row of piling is preferably driven, starting at the up-streamend of the structure' at B; and' ending at the down-stream end'A. The cofter-'dani is now complete, ready r-tinWat-ering-ithe inclosed space. When the-structure incloseflby the coller-dam is completed the coller-dani may be removed vby 'withdrawing the' sheet piling and the piles, this operation commencing at the down-stream end A, and being carried on progressively tothe'iipstream end. The materialsv may be again vused for constructing vanother coter-dam in another section of the river, 'or elsewhere. In case the water is relatively deep, several piles may be driven 'in clusters and braced l accordingly to increasethe strength of the;

structure. The lstruts 21 are preferably applied after the sheetpiling has been driven, one end of each strut bearing on the abut ment. 19 and the other end o`n the abutment 20, the last-mentioned end being preferablyprovided with a clasp 26 composed ot a short length of chain attached to opposite sides of the strot and embracing the correspending inner pile le, said clasp enabling piles are driven in suliciently shallow water,

the ahutments 20 may be formed by stringers attached to the piles 14 after they are driven. The abutments 19, which arehigher than. the abutments 20, are preferably formed by stringere attached to th'c piles 13 after said piles are driven and a'tter the struts 2l have been placed in position. The

ahutments 19 hear on the upper sides of the outer end portions of the struts, while the abutments 20 bear on the under sides of the inner'end .portions of the struts. The inclined struts, engaged as above described with the abutments, cannot be displaced vertically in either direction, and do not require positive attachment to the piles, the ends of the struts being preferably notched orrec'essed topreyent lateral displacement. The struts are, therefore, detachably' secured so that the-parts of the dam may be readily separated. The struts, the piles 13 and 14, and the stringers l5 constitute rigid frames extending crosswise otvthe dam, the resistance of; the frames to water pressure onv the outer side of the dam being much greater than would be the case if the struts were parallel with the stringers.

I claim l. A coder dani comprising pilesdriven in substantially parallel inner and outer rows extending lengthwise of the dani, transverse beams connecting the piles of said rows in pairs, and' a continuous barrier-attached to the outer row of piles, the pilesirst driven and, the beams supported there- I hy constituting vsupports for a track on which a pile-driverniay he mounted in pee sition to drive succeeding piles.

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track members supported hy said transverse beams and adapted to support a pile-driver at diderent portions of the structure in position to drive additional iles.

4. A coder dam .comprlsing piles driven 'in substantially parallel inner and outer rows extending lengthwise of the dam, transverse beams connecting the piles of said rows in airS inclined struts inter osed be,

tweenthe piles of the inner and outer rows, said piles being provided with means for separably engaging the ends of the struts, and a continuous barrier attached to the outer row ot piles. i

5. A coder dam comprising piles driven in substantiallyV parallel inner and outer rows extending lengthwise of the dam,

transverse beams connecting the piles of said rows in pairs, inclined struts interposed between the piles of the inner and puter rows, said piles beingprovided Awith abutments separably engaging the upper and: lower sides of the end portions of the struts, and a continuous barrier attached to the outer row of piles.

ln testimony whereof I have affixed my signature, in presence of two witnesses.

s NILS F. AMBURSEN. Witnesses: y

C. F. BROWN, l. YV, Primaria.

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