US1646997A - Concrete pavement for reservoirs, dams, levees, and the like - Google Patents

Description

* 1 646,997 Oct. 25, 1927. R. w. GELDER CONCRETE PAVEMENT FOR RESERVOIRS, DAMS, LEVEES, AND 'YI-IEn LIKE Filed April ze. 192s L n Imm/liar www @ML ZKM/5g@ Ll i) Patented @et 25', 1927.

UNITED STATES PATENT OFFICE..

ROYAL vv. Giannina, or enn'nnsv, comonline.

Application filed April 26, 1926. Serial No. 104,647

This invention relates to improvements in concrete pavements for reservoirs, dams, levees, and the like, such as are commonly designed to serve as lin-ings for reservoir embankments and floors, and for levee `and dam protection.

The invention has for its objects, generally speaking, the provision of pavements of the class referred to, which are of `improved design, and which are economical to construct and maintain, and, more particularly, the provision of oints in such pavements which are strong and permanently water-tight, but which, at the same time, permit of eXpansion and 'contraction of the-pavement, together with a certain degree o f flexibility.

In the accompanying drawing, Figure l, is a transverse sectional view in elevation of a concrete pavement joint in accordance with the present invention. Figure 2, is an isometric view of a concrete pavement and joint, a portion of the pavement being cut away, to show the character olf the Iconstruction embodying my invention which I prefer to use.

Referring to Figure l, the joint sill 2, shown iii section, extends longitudinally under the open, asphalt-um filled, joint 5, the paving slabs fl overlapping the sill on either side of the join-t. lt has hitherto been the practice in construction of this character, to merely seat the edges of the concrete pavement slabs upon 'the sills at a joint in the pavement, without providing means to restrain the `sill from settling away from the pavement slabs, or the pavement slabs from being heaved away from the sill by pressure from below. In my improved construction I overcome these faults by means of the dowel bars l which are embedded in the concrete sill 2 and protrude from either side of the sill into the ribs, beams, or brackets 3 constructed as integral parts of the pavement slabs 4. In order that no restraint will be offered to the free lateral expansion and contraction of the pavement slabs, the protruding ends of the doivel bars are thoroughly greased with cup grease or other heavy lubricant before embedment in the ribs, beams, or brackets. Asphaltum joints 6 and 7 are made between the upper face of the sill. 2 and bottoni faces of the pavement slabs where they overlap the sill, and between the ribs or beams and the sides of the sill, re-

considerable deflection of the pavement on either or both sides of the joint can 'take place, in either an upward or downward direction, without damage to the structure or water-tightness of the joint, the dowel b'ar bending and slipping in the ljoint 7 sufficiently to accommodate the deflection, while the asphaltum is suiciently elastic and ductile to withstand considerable `deilecti'on of the slabs and distortion in the joints without sacriiice of water-tightness, and further'- mor-e, no vertical movement 4or deiiection at the joint can take place without compressing and making more impervious to leakage, some portion of the joint.

In Figure 2, like numbers designate like parts. The monolithic construction of the sills 2 at points where they intersect one another serves to assist structurally in holding their position with reference to the pavement slabs. In addition to providing a means whereby the sills may be doweled in place the ribs or beams 3 serve to materially strengthen the construction of the pavement slabs and to restrain their llateral displacement, particularly on an embankment where they serve as anchorage to prevent or restrain the tendency of the slab to slide.

While l have sliown and described certain specific embodiments of my invention, I do not wish to be limited thereto in all respects as various changes, alterations, and modi lica'tions, may be made therein without departing from the scope and principle of the same. For example, the ribs, or beams, shown in the drawings may conceivably be constructed to run parallel to and alongside of the sills and doweled thereto, or brackets might be substituted for the ribs or beams. I claim broadly, therefore, the arrangement whereby, in a concrete pavement which overlaps a sill at its joints, the sill is doweled to an integral part of the pavement.

l desire to call particular attention to the fact that the pins or dowel bars serve to interconnect the sills and slabs in such a manner that the sill cannot move'away from the slab, if for any reason there shall be uneven settling and that the slabs will not move away from the sill or sills if they should be raised in some way. The construction is such that the sills and slabs are mutually supporting and provides sutcient flexibility to the joints to permit of free expansion and contraction in the slabs and moderate deHec-tion at the joint wit-hout detriment to the reciprocal support afforded by the dowel connection. y,

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is: f,

1.-In a concrete pavement having a sill and two slab portions provided with ribsv on the under surface, the ends of said slabs overlapping the silland having their edges in contact so `asto form a joint, a dowel pin extending transversely through the sill and projecting into openings in the ends of the ribs. l' i .-2. In a'concrete pavement having a plud rality of supporting sills and concrete slabs supported at their edgesv on said sills, the joints-between adjacent slabs being above and parallel with said sills, integral ribs pro- Y jecting downwardly from the lower side of each, slab, the ends of said ribs terminating adjacent ithe sides of the sills and dowel pins extending through the sills and'having their ends extending transversely into openings in said ribs wherebythe slabs become anchored to the sills.

i '3. In a ribbed concrete pavement having a sill and two slab portions overlapping the sill from opposite sides so as to be supported by the sill, a waterproofing material between the upper surface of the sill and the under surface of the slabs and between t-he adjacent edges-of the slabs.

4. In aribbed concrete-pavement having a sill and two slabportions overlapping the sill from opposite sides so-as to be supported by the sill, a waterproofing material bet-Ween therupper'surface of the 'sill and the under surface of the slabs and between the adjacent edges of the slabs, integral ribs having a surface on the undersides of the slabs,

said ribs terminating adjacent the sides of j the sill and dowel pins extending transverse-` ly throngh the sill and projectinglinto ,the

openings in the ribs.

6. A concrete pavement comprising, in combination, spaced sills, concrete slabs supported at their edges on the upper sides of said sills, .said slabs being provided on their under surface with ribs whose ends terminate adjacent the sides of the sills and dowel pins extending transversely through the sills and projecting into openings in the.

ends of the ribs, the ends of the dowel pins that extend. into the ribs being covered with a substance that preventsthe concrete from adhering to the surface ofthe pins. l

7. A concrete pavement comprising, in combination, spaced sills, concrete slabs supported at their edges `on the upper surfaces of said sills, said slabs being provided on their under surfaces with ribs which ter-V minate adjacent the sides of the sills, dowel pins extending transversely through the sills and projecting into openings in the adjacent ribs, and a layer of waterproofing material between the adjacent edges of the slabs and between the tops of the sills and the bot toms of the slabs. Y l

8. A concrete pavement comprising in combination, spaced sills, concrete ,slabs ibly interlocking; Y

ROYAL W. GELDER.

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