US1819664A - Bulkhead - Google Patents

Description

0. K. WEST BULKHEAD Filed Sept. 20, 1929 2 Sheets-Sheet l INVENTOR BY m 4f m es'z ATToRNl'z Aug. 18, 193] 0. K. WEST 1,819,664

I -BULKHEAD Filed Sept. 2Q. 1929 2 Sheets-Sheet. 2

INVENTOR 0074*? 47 M52- ATTORNE'Y '30 bulkhead to the inner Patented Aug. 18, 1931 :1 EE EEE ST OMAR K. WEST, OF DETROIT, -MIGHIGAN BULKHEAD Application filed September 20, 1929. Serial No. 894,101.

This invention relates to improvements in bulkheads, 'and refers more"particula'rly to adjustable bulkheads which may be readily applied to the ends of forms before pouring either concrete tunnels for sewers, culverts and the like, or caissons.

It is anobject of the'invention to provide a bulkhead which may either. be employed for tunnel work wherein an internal form only is used and the earth employed as'the external form in which case a movable plate on the bulkhead is moved outwards so that it enters the earth and holds that end of the bulkhead in position, or for caissons wherein both internal and external forms are employed in which case the movable plate is moved outward'and secured to the outer form.

In the latter case the movable plate is intended to be moved back before removal of the bulkhead so as to materiallyfacilitate that operation.

Other objects of the invention are to provide a bulkhead wherein striking flanges are provided so that the movable plate may be readily driven partly into the earth or out of the latter in tunnel work, or in caisson work moved from its inward to its outward position or vice versa; wherein means are provided for securing the inner end of the form; and whereina gripping member is provided so that the bulkhead maybe easily pried. away from'the end of the tunnel or caisson after the concrete has set. I '35 With these and other objects and advantages in view which will become apparent as the specification proceeds the invention s hereinafter more fully described with theaid of the accompanying drawings, in which:

Figure 1 illustrates a front elevation of the invention in position on the end of a tunnel, and I V Figure 2 is a. section on the line 2-2 of Figure 1. Figure 3 is a detail in perspective Figure t is a front elevation of'the invention'in place on the-end of a caisson, and

Figure 5 is a section on the line 5-5 of Figure 4c.

5 Referring firstly to Figures 1, 2 and 3. l

-margins-11a welded outer margin designates a section of a concrete tunnel having its outer side bounded by earth indicated alt-2, and a conventional metal form bounding its inner side. Projecting "forwardly from the end of the form 3'is a usual channel-shaped member 4. Referring now to the bulkhead, 5 denotes a stationary plate which, in this case, should besubstantially the same width as the wall of the tunnel 1, and in the case of circular tunnels segmental as shown. The inner-end of this plate 5 rests on the member 4. Projecting forwardly from the plate5 isa channel member 6 which is usually reinforced by gussets 6a since it is frequently submitted to a severe strain in a manner hereinafter mentioned. 7 indicates fish plates one extremity of eachof which is suitably fastened-towards one end of the outer side of the channel member 6. The opposite ends of the plate .7 are provided with holes 8 to receive bolts-9 which also extend through holes 10 inthe forwardly projecting flange 4a of the member 4. Thus the stationary plate 5 is held relative to the inner form 3. I Onthe-rear side of the stationary plate 1, and usually extending the full width of the latter is a key 11, The latter is preferably made of sheet steel, has its upper and lower or otherwise suitably secured to the plate 1, and its upper and lower walls 11?) and 110 rearwardly inclined towards one another and connected by "a substantially vertical portion 11d. Inthis case the endslof the key 11 are closed by heads 116 which are usually welded in position.

Slidable onfthe stationary plate 5 isia movable plate 12 usually ofsubstantially the same width as the latter and oflesser length. When the bulkhead is placed inposition the of the plate 12 should be substantially flush with the outer margin of the stationary plate 5. Projecting through the latter and usually having their heads welded v against the said stationary plate to hold them against movement arebolts13 which extend through slots "14 in the movable plate 12. These bolts act as guides and .permit move-, ment ofithe said movable plate. 15and '16 indicate angle members arranged transversely latter is reinforced on the plate 12, and 17 is a handle thereto.

When the bulkhead is to be placed in position it is usually lifted by its handle 17 and the channel member 6. The fishplates are then secured in position to hold the inner end of the bulkhead. Nuts 18 on the bolts 13 are loosened andthe movable plate 12 1S driven outwards by striking either of the angle members 15 or 16 so that the said plate becomes partly buried in the earth. The outer end of the bulkhead is then firmly held in place. The provision of the outer angle member 15 is to afford the movable plate secured greater resistance against movement after the latter has been driven sufficiently far outwards for that member to have become imbedded in the ground.

After the concrete has set the bulkhead is removed by striking the angle member 16 and disengaging the movable plate 12 from the earth. Then the bolts 9 are removed from the fish plates 7 and the stationary member is pried outwards by taking a grip under the channel member 6. And for this reason the by the gussets 6a so that it will withstand the prying strain.

In Figures 4; and 5 a modified construction is shown applied to caisson forms, in which case an outer form has to be employed as there is no earth to utilize in its stead.

In this case 162 designates a caisson having its outer and inner. sides bounded by forms 2a and 3a respectively, and forwardly projecting conventional channel-shaped members 4b and secured to the ends of the latter.

Referring to the bulkhead itself 5a de notes a stationary plate similar to the plate 5 also having a channel member thereon reinforced by gussets 60. To the channel member 6?) and also to the channel member 40 fish stationary plate relative to the inner form 3% In this case a solid key 11g is shown secured by screws 11h to the inner side of the stationary plate 5a though when desired other forms ofkeys may be substituted.

Bolts 13a extend through the stationary plate 5a for holding a movable plate 12a and project through slots 14a in the latter.

' moved into its outer position shown.

= gin, with the channel member 46. By this means the outer end of the movable plate is firmly held relative to the outer form 2a,

One angle member 16a and a handle 1711 are similarly mounted on the movable plate 12a and similar nuts 18a are utilized on the plates 7a are secured for holding the.

bolts 13a for securing the movable plate 12a relative to the stationary plate 5a. 186 denotes wings suitably secured to the nuts 18 or 18a to facilitate turning them.

The movable plate 12a is disconnected from the channel-shaped member 17) by removing the fishplates 20 and driven into such position that it overlies the stationary plate 5a before the inner end of the latter is loosened from the inner form 362/. and the whole bulkhead pried loose. The purpose of this is to reduce the amount of bearing surface of the bulkhead on the concrete and therefore to materially lessen the labor required to remove the former from the latter.

IVhile in the foregoing the preferred embodiments of the invention have been described and shown, it is understood that the construction is subject to such further modifications as fall within the scope of the appended claims.

What I claim as my invention and desire to secure by Letters Patent is:

1. In a bulkhead, the combination of a stationary plate adapted to extend outwardly from one extremity of an inner form and substantially at right angles thereto a memher on the outer face of said plate, plates secured to said member which are attached to other members projecting forwardly from one end of the inner form, a key secured to the inner face of the stationary plate, a movable plate having substantially parallel slots therein slidable on said stationary plate and substantially parallel thereto, and fastening means engaging said stationary plate and projecting through said slots which either permit the movable plate to be moved substantially parallel to the stationary plate or enable the movable plate to be held still on the stationary plate, said movable plate being adapted to project beyond the outer margin of the stationary plate.

2. In a bulkhead, the combination of a stationary plate adapted to extend outwardly from one extremity of an inner tunnel form, a movable plate slidable on said stationary plate, means for holding the movable plate relative to the stationary plate, a key on the rear side of the stationary plate, and a transverse member on the front side of the movable plate, said movable plate and said transverse member being adapted to project outwardly beyond the stationary plate and to enter the earth which constitutes an outer tunnel form.

3. In a bulkhead, the combination of a stationary plate adapted to extend transversely of one extremity of an inner form having a channel-member arranged transversely adjacent its inner margin, said inner margin being adapted to rest on a member projecting forwardly from an inner tunnel form, fish plates connecting said transverse chan nel member with the other member, a key on the rear side of the stationary plate, a movable plate on said stationary plate, and means for holding said movable plate still relative to said stationary plate, said movable plate being adapted to project outwardly beyond the stationary plate so that its outer margin extends into the earth which forms on outer tunnel form.

4. In a bulkhead, the combination of a stationary plate the inner margin of which is to lie adjacent one extremity of an inner tunnel form and said plate lying at right angles to said inner form, means for holding that margin of the stationary plate relative to said inner form, a hollow key on the rear side on said stationary plate, a movable plate having substantially parallel slots therein, means engaging said stationary plate projecting through said slots so that said movable plate may either be held against independent movement or permitted to move substantially parallel with and on said stationary plate, and projecting portions on said movable plate adapted to be struck so that that plate may be thereby moved relative to said stationary plate, one of said projecting portions and the outer portion of the movable plate being adapted to enter the earth which forms an outer tunnel form.

5. In a bulkhead, the combination of a stationary plate extending outwardly from one extremity of a tunnel form and at right angles thereto, means for holding said plate relative to said form, a transversely arranged member on said plate having a flange substantially parallel with the inner margin of said plate so that a pry may be obtained thereunder, a movable plate adapted to slide on said stationary plate substantially at right angles to the inner margin of the latter, means for holding said movable plate still on said stationary plate, a closed hollow key on the rear side of said stationary plate, and at least one channel member extending transvegsely across the movable plate on its front s1 e.

6. In a bulkhead, the combination of a stationary plate adapted to extend outwardly from one end of an inner form and substantially at right angles thereto, a member on the outer face of said plate, means for securing said member to said inner form, a key secured to the inner side of the stationary plate, a movable plate slidable on said stationary plate, said movable plate being adapted to project outwardly varying distances beyond the margin of the stationary plate adjacent said inner form, and means for holding said movable plate against move ment relative to said stationary plate.

OMAR K. WEST.

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