US1791840A - Embankment for roads, railroads, and the like - Google Patents

Embankment for roads, railroads, and the like Download PDF

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Publication number
US1791840A
US1791840A US174040A US17404027A US1791840A US 1791840 A US1791840 A US 1791840A US 174040 A US174040 A US 174040A US 17404027 A US17404027 A US 17404027A US 1791840 A US1791840 A US 1791840A
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embankment
water
frost
layer
railroads
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US174040A
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Popke Lars Harald
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01BPERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B1/00Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
    • E01B1/008Drainage of track
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01BPERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B1/00Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
    • E01B1/001Track with ballast
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01BPERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2204/00Characteristics of the track and its foundations
    • E01B2204/07Drainage

Definitions

  • This invention relates to embankments for roads, railroads and the like in cold countries.
  • the object of the invention is tocounteract and as far as possible prevent the wellknown rising or swelling of the embankments when the frost breaks up in spring time. 7
  • the 'disadvan- .tages of the frost are eliminated by trying to prevent the admittance ofwa'ter to the road embankment or the like during the cold sea son, thus preventing frost formation in the foundations, etc., bylaying in the embankment or the like at suitable depth'one or; more layers of a tight material that does-not transmit water or water vapour.
  • condensed water and capillary water are entirely prevented from penetrating 'into the embankment and form frost.
  • the said layer should be in'the main parallel with the above surface of the embankment so as to evenly distribute the pressure to the ground below. 7
  • the layers may preferably be made out of sheet iron, plane or corrugated, or out of wood or other material that does not transmit water or'water-vapour.
  • the tightening layer l may be made out of sheet-iron, suitably galvanized or in other way made rust-proof. It may also be made out of other suitable'tight material.
  • the plate 1 In order to prevent sliding of the part of the embankment above the :plate 1, the latter may be provided with angle irons 2, projections or the like in the length direction of the] road; 7 v p
  • the plate shown in the figure isplane but may also be corrugated.
  • a road, railroad and the like embankment consisting of an earth fill comprising a sheet material and water impervious layer in said fill arranged substantially horizontal under the road; and a substantial layer of earth] between the roadand'the sheet layer, said sheet layerbeing adapted to prevent the ground moistu'reffrom creeping upwardly and depositing in the earth layer-under the road.

Description

Feb. 10, 1931. L. H. POPKE 1,791,840
EMBANKMENT FOR ROADS RAILROADS AND THE LIKE Filed March 9, 1927 //7 van for.-
Patented Feb. 10, 1 931 u NIT a srA'rssr -r LABS HARALD rorxn, or SOLLEFTEA, swnnnn EMBANKME-NT non noAns, :R-AILnoAns, Ann HE LIKE?" Application filed March 9, 1927, Serial No. 174,040; and asweaa nmn 9,4926.
- This invention relates to embankments for roads, railroads and the like in cold countries. The object of the invention is tocounteract and as far as possible prevent the wellknown rising or swelling of the embankments when the frost breaks up in spring time. 7
According to general opinion the frost in the ground is-formed in the following way:
At the first stage of the frost formation the.
water present in the moist soil freezes to ice at the surface. Thereupon ground water penetrates upwards on account of the capillary force and is deposited as ice on the underside of the already formed crust. It has also been believed that water in the form of vapour is conveyed through the. cavities in the groundfrom the deeper moist layers and is condensed below the frozen crust due to the wellknown physical law of the cold wall. The water thus condensed is thereuponfrozen to ice by the chill from the outside. The frost crust is gradually growing in the last named way causing the layers above the frost-proof V swelling occurs due to the frost which is esdepth finally to contain considerably more water than the same would have been able to absorb in an unfrozen state. Thiscauses the frost to break up and the soil. becomessoft,
even practically liquid, and therefore will be less or not at all able to withstand the pres sure exerted by vehicles, horses, etc. In the frozen ground in winter-time also rising or pecially troublesome "in railroad banks.
Above named disadvantages are particularly great when certain kinds of clayare present in the ground.
As above described three differentfactors contribute to the frost formation, namely:
1. Surface water-or free'water;
3. Condensed water.
It has been tried tosreduce the, mentioned disadvantages by laying twig or sandbed:
- dings belowthe road or railroad fembank ment, therebytrying to prevent the frost from. penetrating. into the same. Experience has, however, proved that such [a method not at all or only in a verylittledegree eliminate the said disadvantages.
I According'to this inventionthe 'disadvan- .tages of the frost are eliminated by trying to prevent the admittance ofwa'ter to the road embankment or the like during the cold sea son, thus preventing frost formation in the foundations, etc., bylaying in the embankment or the like at suitable depth'one or; more layers of a tight material that does-not transmit water or water vapour. By this method condensed water and capillary water are entirely prevented from penetrating 'into the embankment and form frost. The said layer should be in'the main parallel with the above surface of the embankment so as to evenly distribute the pressure to the ground below. 7
The layers may preferably be made out of sheet iron, plane or corrugated, or out of wood or other material that does not transmit water or'water-vapour.
The invention is illustrated by wayof example in the accompanying drawing, wherein is shown a cross-section through a road embankment provided with one layer of a tight material.
The tightening layer l may be made out of sheet-iron, suitably galvanized or in other way made rust-proof. It may also be made out of other suitable'tight material. v
In order to prevent sliding of the part of the embankment above the :plate 1, the latter may be provided with angle irons 2, projections or the like in the length direction of the] road; 7 v p The plate shown in the figure isplane but may also be corrugated.
When embedd'ng a layerof tightfmaterial' V in the embankment in accordance with-the invention, the road body above'the same will become safe "against the admittance of condensed water and'capillary water. 4 The cavitiesin the ground above the tightlayer will therefore contain an ordinary quantity of air. -Butfas a1r: 1n .comparlson -w1th 1ce lsa very'b'ad'heat conductor,theroadbodyboth Y I above andbelowthe tight'layer will be much better insulatedagainst the chill. The chill will be muchless able to penetrate down;
"ice. i
through-the embankment so that a consid- Q my hand.
erable decrease in the frost-proof'depth is reached. In fact the ground below the tight layer will also be frost-proof so that the said layer will be embedded practically entirely in frost-proof soil. 7
Iclaim: V
A road, railroad and the like embankment consisting of an earth fill comprising a sheet material and water impervious layer in said fill arranged substantially horizontal under the road; and a substantial layer of earth] between the roadand'the sheet layer, said sheet layerbeing adapted to prevent the ground moistu'reffrom creeping upwardly and depositing in the earth layer-under the road. y r V In testimony whereof I have hereunto set LABS HARALD Po PKE.
US174040A 1926-03-09 1927-03-09 Embankment for roads, railroads, and the like Expired - Lifetime US1791840A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5007764A (en) * 1988-04-11 1991-04-16 Poentynen Esko Insulated trafficked surface
US20030178194A1 (en) * 2002-03-20 2003-09-25 Maxwell Andrews Method of reducing ground disturbance during freeze-thaw cycles and a subsurface insulation material

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5007764A (en) * 1988-04-11 1991-04-16 Poentynen Esko Insulated trafficked surface
US20030178194A1 (en) * 2002-03-20 2003-09-25 Maxwell Andrews Method of reducing ground disturbance during freeze-thaw cycles and a subsurface insulation material
US6854935B2 (en) * 2002-03-20 2005-02-15 Maxwell Andrews Method of reducing ground disturbance during freeze-thaw cycles and a subsurface insulation material

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