US1387184A - Roadbed construction - Google Patents

Description

C. J. ROELKER.

ROADBED CONSTRUCTION. APPLICATION FILED mums. 1920.

1,387, 184. Patented Aug. 9, 1921.

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BOADBED CONSTRUCTION. APPLICATION man mmzs, 1920.

1,387,184. Patented Aug. 9,1921.

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CARL J. ROELKER, or RICHMOND, VIRGINIA, Assrenon or ONE-FOURTH To w. I.

- LEE, or RICHMOND, VIRGINIA.

Applicatio n filed. March 29, 1920. Serial No. 369,517. ,I

T all whom it may concern:

"Be, it known that I, CARL J. ROELKER; a citizen of the United-States, residing in the cityof Richmond, county of IIenrico, and

. State of Virginia, have invented new and useful Improvements in Roadbed Construction, of which the following is a specification.

This invention relates to cement or concrete road-bed construction for railways. The general object of the invention is to provide, a; construction of this character which can be'readily produced and which is ..provided with simple means for securing the rails; also to provide simple means for increasing the supporting surface of the construction which rests upon the earth or ballast. A further object of the invention ,is -toprovide a seat-plate of simple construction for supporting the rail and having special features of construction for preventing the plate from shifting on the upper face of the cement and for preventing the rail from shifting on the seat-plate. One of my objects isto provide a general construetion of this character havinga maximum strength and supporting surface with a minimum weight ofcement.

Further obiects of the invention will pear hereinafter.

Thev invention consists in the novel features and in the general combination of parts to be particularly described hereinafter. all of which contribute to produce a simple and -eflicient-road-bed construction. A preferred embodiment of my invention will be particularly described in the following specification. while the broad sco'oe of my invention will be pointed out in the appended. claims.

In the drawing V Figure 1 is a plan showing a portion of a road-bed embodying my invention;

Fig. 2 is a plan-upon an enlarged scale and furtherillustrating details of the in vention:

Fig. 3 is a cross-section taken on the line 3 30fFig.2;.

Fig.4 is a cross-section taken on the line 44 of 2; 1

Fig. .5. is a cross-section taken through one-of the rails and through a supporting stringer and particularly illustrating details of the mounting forfthe bolts which secure the rails;

I Specification of Letters Patent. Patented Aug.

. cement and for app-i ROAJJBED CONSTR'UCTION.

Fig. .6 is a plan upon an enlarged scale of one of the seat-plates which may be employed for supporting the rails on theface of the cement; and 1 Fig.7 is an edge elevation-10f the plate shown in F ig. 6 and indicating the means carried by the plate for anchoring it to the preventing lateral shifting of the rail.

In carrying out my invention I provide a palr of oppositely disposed" stringers I, 1

which extend longitudinally with the road- 7 ends of the stringers may be placed as near together as desired soas'to reducethe unsupported portlon ofthe rails between the adjacent units In order toadapt this construction to lo- I cal road-bed conditions and to insure sufficlent supporting surface for the construction resting upon the earth or ballast, I prefer to provide the ends of the tie-members with 1 lateral er-itensions 1 in line withthe stringers which arealsovirtually lateralextensions of the tie-members; I also may provide footing-webs 4 which connect the sides of the tie members with th inner sides of the stringers. These webs also operate to support the weight of a portion of the ballast; thistends to prevent shifting of the structure. They and are formed in a monolithic structure with the stringers and tie members. In the present instance these webs are formed in the corners at the junction points of the,

95 I are preferably formed of'cement or concrete stringers andtie-members. These webs may I have any width desiredto adapt them to the character ofthe earth or ballast; that is to say, they may be made wider or narrower to suit the local road-bedconditions.

The footing-webs are; preferably placed so that their" lower faces are flush with the bottom faces of the stringers and tie members,*('see Fig; 3). In order to give these footings 1 great strength with a minimum amount of Web with a plurality of reinforcing bars and these bars may be arranged parallel with the outer edge (5 of the webs; the bodies of these rods are therefore disposed within the webs and the ends of the rods extend into the interior of the stringers and tie-members (see Fig. 2).

in order to provide simple means for securing the rails to the cement construction and also to provide an enlarged area for distributing the weight of the rail and rolling stock on the cement, I prefer to provide a plurality of bolt-webs 7. These webs may be disposed in any suitable manner, provided they connect the sides of the lateral extensions, that is, the stringers and parts 1. with the sides of the tiemembers. These webs are not necessarily formed of cement, but may be, if desired, in the form of small plates or gussets embedded in the cement.

. I prefer however, to form these webs of cement simply monolithically with the rest of the construction. The upper faces of these webs are preferably flush with the upper faces of the cement. These webs should be of sufiicient depth to have ample strength to enable them to operate as mountings for bolts. In case these bolt-webs are so deep as to interfere with the placing of the belts in position, I may mount the inside bolt such as the, bolt 8, (see Fig. 5), in such a way that the bolt passes up through the footing-web and through an alining opening in the boltweb 7 just above.

In the case of the outside webs however, l provide shorter bolts 9 which simply pass up through the bolt-webs.

In order to secure the rails 2, l. prefer to provide a plurality of rail seat-plates 10 (see Fig. 6) these seat-pl ates are simply flat steel plates of substantially 2 form. that is to say, the plates are long enough to extend over the lateral extensions at the ends of each tic-member, and have extensions 11 which project out over the boltwebs. These extensions are located on opposite sides of.

the plate but out of line with each other. These plates have bolt openings 12 which aline with the bolts 8 and 9 so that after the bolts are placed in position, nuts 13 may be applied to the ends of the bolts to secure rail clips 1%, (see Fig. 5), which engage the flange 15 of the rail on opposite sides. The plates 10 are preferably countersunk into theface of the cement so that between the seat-plates, the bottom of the flange rests on the face of the cement.

The seat-plates 10 are preferably contion; this means however, should extend down into the cement so as to give the effect of an anchor. I prefer to accomplish. thlsbedded in the concrete, (see Figs. 6 and 7).-

In order to prevent any tendency of the rails 2 to shift laterally on the seat-plates, I provide the seatrplates with oppositely disposed upwardly projecting lugs 17 (see Fig. i

'1'); these lugs engage the edges of the rail flange substantially as indicated. Although l have shown a bolt opening 18 in each of the boltwebs, in Fig. 2, it will be noted that each seat plate only utilizes two of these openings. However, if desired, evidently the plate 10 may be made'of bl shape so as to enable four bolts to be used in each plate instead of two, and it is also obvious, by bending the lug 17 in an opposite direction from that indicated in Fig. 7, and by bending the lug 16 likewise in an opposite direction, the plate maybe given an opposite character, that is to say, the plate 10 can be of right hand'form or left'hand form. This gives the construction a certain amount of flexibility which may be desirable under certain circumstances for example, where the the road-bed is laid on a bridge.

ln order to reinforce the bolt-webs 7,1.-

may provide reinforcing means in the form of a bent rod 19 extending substantially around the pomt of intersection of a stringer and a tie-member so as to lie in the outer porl .t ons of the webs, to reinforce all four of the webs. H in the angles between the tie-member and its lateral extensions and are disposed inwardly with respect to the reinforcing means By placing the bodies of these rods The bolts are therefore located the under portion of the stringers they will absorb a great deal of the tension which exists in the stringers when a car wheel is directly over a stringer at an intermediate point between two tie-members. While of course, the stiffness of the rail tends to distribute the load over the entire bearing surface of the upper face of the cement,

there is a tendency for the concentrated load to bend the stringer downwardly at its middle point, the effect of which wouldloe to produce a tensile force in the under side of the stringer. I in order to strengthen the tie-members, I

provide a plurality of reinforcing rods 22] (see Fig. 3). The bodies of these rods are disposed. near the upper portion ofthe tiestrength ofthe tie-members and enable'the tiemembers to resist the high tensile forces which are developed in the upper portion of the tie-members when a wheel is resting on each end of a tie-member. When this occurs the concentration of the load at the ends ofthe tie-member'has a tendency to depress the ends of the tie members and causev a'relative elevation of the middle portion of the tie-members, that isto say, the upper portions of the tie-members are in tension and the lower portions in compression.

What I claim and desire to'secure by Letters Patent is:

l. A cement road-bed construction consisting of a pair of oppositely disposed stringers extending longitudinally with the road-bed under the rail positions, transversely disposed tie-members connecting the stringers, and footing-webs of less depth than the tiemembers connecting the innersides of the stringers with the tie-members and operating to support the weight of a portion of the ballast, and to increase the supporting surface resting on the earth or ballast.

2. A cement road-bed construction consisting of a pair of longitudinally disposed stringers located under the rail positions, transversely disposed tie-members connecting the stringers, footing-webs connecting the tie-members with the inner sides of the stringers to increase the supporting surface resting on the earth or ballast, rail seatplates countersunk into the upper face of the cement, and bolts passing through said webs and through said seat-plates, and extending above the upper face of the cement for securing the rails.

3. A cement road-bed construction consisting of a pair of oppositely disposed stringers located under the rail positions, transversely disposed tie-members connecting the stringers, footing-webs connecting the inner sides of the stringers with the tiemembers to increase-the supporting surface resting on the earth or ballast, bolt-webs connecting the sides of the stringers with the sides of the tie-members, rail seat-plates countersunk into the upper face of the eement, and bolts carried by the bolt-webs and extending up through the seat-plates for securing the rails. 7

4. A cement road-bed construction consisting of oppositely disposed stringers extending longitudinally with the road-bed, and located under the rail positions, transversely disposed tie-members connecting the stringers and having their ends projecting beyond the stringers, bolt-webs connecting the outer sides and inner sides of the stringers with the tie-members,rail seat-plates countersunk into'the upper face of the cement and'extending over said webs, and bolts carried by the bolt-webs extending up through the seatplates for securing. therails.

5. A cement road-bed construction consist ing of I stringers extending longitudinally with the road-bed, located under the rail positions, tie-members extending transversely to the stringers and with their ends projecting beyond the outer sides of the stringers, bolt-webs on the outer s des of the stringers and connecting the strlngers with the sidesof the projecting ends of the tie-members, bolt+webs formed onthe inner sides of the stringers and connecting the same with the sides of the tie-members, and

bolts carried by said bolt-webs and projecting above the upper face of'the cement, for I securing the rails. 6; A cement road-bed construction cons st- .ing'of a pair of oppositely disposed stringers extending longitudinally" with, the road-bed, reinforcing i bars. extending longitudinally with the stringers-and disposed in the lower portions" of the stringers, transversely disposed tie-members connecting the stringers,

reinforcing bars within the tie-members and dlsposed in the upper portions thereof, bolts,

and means for holding the same in the cement on opposite sides of the rail positions,

for securingthe rails, footing-webs of less depth than the tie members connecting the stringers and tie-members operating to support the weight of a portion of the ballast,

and also to increase the supporting surface resting on the earth or ballast, and reinforcing bars within the websand' extending into the interior ofthe stringers and tie-members.

7 .o A cement road-bed construction consisting of a pair of oppositely disposed stringers extending longitudinally with the road-bed, and located under the rail positions, tr'ansversely disposed tie-members connecting the stringers and having their ends projecting beyond the stringers, bolt-webs formed of cement on the outer sides of the stringers and on the inner sides of the stringers, and connecting the stringers with the tie-members, reinforcing rods withinsaid webs and extending into the interior ofthe stringers and tie-members, and bolts carried by said webs for securing the rails.

8. A cement road-bed construction consists ing of oppositely disposed members extending longitudinally with the road-bed and located under the rail positions, transversely disposed tie-members connecting the said members, bolt-webs connectingthesides of the said members with the tie-members, rail seat-plates countersunk into the upper face of the cement and having downwardly extending means embedded in the cement, and bolts mounted in said bolt-webs and passing through said plates for securing the rails,

9. A cement road-bed construction consisting of oppositely disposed tie-membersextending across the road-bed and having lateral extensions located under the rail positions, bolt-webs connecting the sides of the lateral extensions with the tie1nembers, rail seat-plates countersunk into the upper face of the cement, said seat plates having downwardly extending lugs projecting into the cement and having upwardly projecting lugs for engaging the edges of the rail flange; and bolts mounted in said bolt-webs and passing through said plates for securing the rails.

10. In a cement road-bed construction, a transversely disposed tie-member having lateralextensions adjacent the ends thereof,

webs disposed in the angles between the tiemember and the lateral GXtGHSlOllS, ad acent the upper face of the tie-members, and bolts passing loosely up through said webs for securing the rails, said webs being of less depth than the tie-member and constructed to the ballast at the side of the tie-member.

11. In .a cement road-bed construction, a transverse tie-member having lateral extene'rmit removal of the bolt by removing sions adjacent the ends thereof and integral webs formed in the angles between the tiemember and lateral extensions, the upper faces of said webs being substantially flush with the upper face of the tie-member, a seat-plate at each end supported by the tiemember and lateral extensions, and bolts mounted in the webs and passing through the seat-plates for securing the rails.

12. In a cement road-bed construction, a transverse tie-member having lateral extensions adjacent the ends thereof, integral webs formed in the angles between the tiemember and the extensions, with their upper faces flush with the upper faces of'the tieineinber and extensions, reinforcing means carried in the tie-member and lateral extensions and extending through the outer portions of the webs, each web having a bolt located in the angle and disposed inwardly with respect to the reinforcing means for securing the rails.

In testimony whereof, I have hereunto set my hand.

CARL J. ROELKER

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