US 3621660 A
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Description (OCR text may contain errors)
Nov. 23, 1971 J. KRINGS 3,621,660
BUILDING SET FOR THE SHEETING OF SERVICE DITCIIES Filed May 11, 1970 2 Shoots-Shoot 1 :7 3 A f: v
I I6 3 L 0/ 8 F; .4 ALV 9 VIII INVENTOR. J 0 SE F K RlNGS ATTOQNEYS Nov, Z3, 1971 KRlNGs 3,621,660
BUILDING SET FOR THE SHEETING OF SERVICE nl'rcuEs Filed May 11, 1970 2 Shoots-Shoot 2 I I a I v y I f I I l I 4 INVENTOR. JUSEF KPANGS OQMEYS United States Patent US. C]. 6139 Claims ABSTRACT OF THE DISCLOSURE This disclosure relates to sheeting for shoring ditches and similar embankments. In lieu of the usual arrangement in wooden timbers, or in the case of permanent sheeting, steel plates, each wall of the sheeting is formed of hollow steel sections joined together with there being disposed at regular intervals guide supports, each of which includes one leg which is receivable in the sheeting and a second leg which projects into the ditch and has received therein shoes of tightening devices. The guide supports are longer than the sheeting and project therebelow so as to provide support for the sheeting and to permit the additional driving of the sheeting as excavation proceeds without releasing the supporting pressure on the sheeting.
The invention relates to a building set for the sheeting of service ditches or similar things consisting of building plates to be arranged in transversely spaced pairs and tightening devices that can be attached between the plates, which tightening devices include tightening elements which are adjustable axially and shoes arranged at the ends of the tightening elements, and which shoes are received in perpendicular guide supports fitting against the sheeting plates.
In the case of mechanical sheeting of service ditches or similar things, it has been known to drive sheeting plates along the sides of the excavated ditches that are to be excavated into the soil by means of a ramming weight which can be operated by an excavator. These sheeting plates as a rule consist of steel sections connected firmly with one another, whose longitudinal axes run parallel to the axis of the ditch. T ransversely to these sheeting plates are guide supports, generally in the form of hollow sheet steel sections, connected firmly with the plates, each guide support having a carrier section for the reception of shoes, and which section is open in the direction of the inside of the ditch. The shoes are, in turn, attached to the free ends of longitudinally adjustable tightening elements stretching across the width of the ditch. These tightening elements press the sheeting plates lying opposite to one another against the walls of the ditch and prevent the ditch from caving in.
It in the course of the further excavation of the ditch the sheeting plates are driven more deeply into the soil, then the tightening elements first must be released, so that 3,621,660 Patented Nov. 23, 1971 distortions of the profile of the ditch will be avoided. When releasing the tightening elements, however, changes in the profile of the ditch likewise can occur easily due to the forces of the pressure of the soil acting on the sheeting plates, and under certain conditions caveins can occur.
In order to avoid these, the proposal Was already made in my copending application Ser. No. 793,409, filed Jan. 23, 1969, now US. Pat. No. 3,530,679, not to fix the shoes in the guide supports, as is generally customary, but to guide them slidably. However, this solution offers only limited advantages.
Therefore the present invention is based on the task of creating a building set for the sheeting of ditches where the driving in of the sheeting plates and the changes in the position of the tightening arrangements can be accomplished to a large extent independently of one another in such a way that the profile of the ditch remains intact and that a safe support of the wall of the ditch will be continuously guaranteed.
In accordance with the invention the sheeting plates are formed as elongated section carriers or steel sheet sections rigidly connected with one another, whose longitudinal axes run essentially perpendicularly and that the guide supports, in relation to the sheeting plates, are guided in said plates relatively shiftably.
With this construction, it is possible to drive in the guide supports independently of the sheeting plates or to draw them in independently and to arrange them at any desired positions of the sheeting plates. In doing so, this will result in the advantage, that in the case of the placement of large diameter pipes into the ditch, the sheeting plates can remain in their positions and merely the guide supports are pulled out somewhat in relation to the sheeting plates with the transverse tightening of the sheeting plates facing each other suffering thereby in an essential way.
An advantageous development of the invention consists in this, that the sheeting plates consist of hollow sections and that the guide supports have been developed as forkshaped bodies with parallel legs, one of which inside legs is guided glidingly in one of the hollow sections of the assigned sheeting plate and the other outside leg of which is disposed inside the profile of the ditch and consitutes a guide for the shoes of the assigned tightening arrangements.
A further advantageous development of the invention consists in this, that at least the outside leg of the guide support is longer than the height of the sheeting plate. As a result of that, it is possible to drive in the guide support deeper than the sheeting plate and to use it also as a guide support for the sheeting plate, which can then be driven in subsequently and accordingly.
Even if the soil below the sheeting plates is underwashed, still the guide for the sheeting plates remains intact. In order to develop the tightening elements guided in a pair of guide supports into a rigid tightening frame, it will be advantageous if there are two shoes guided in one guide support with two tightening arrangements being connected rigidly with one another. If desired and for practical purposes, two shoes each disposed one above the other can be connected rigidly with one another through an intermediate element which is adjustable in its length.
Further characteristics of the invention will come to light from the subsequent description of embodiments according to the invention given by way of example on the basis of the drawings.
FIG. 1 is a perspective view of a schematic arrangement of one side of the. building set according to the invention in operating position.
FIG. 2 is a fragmentary vertical sectional view through a ditch taken generally along the line II--II in FIG. 1.
FIG. 3 is a fragmentary horizontal sectional view taken along the line IIIIII in FIG. 2.
FIG. 4 is an elevational view of one set of shoes with parts broken away and shown in section.
With reference to the drawings, the building set according to the invention consists of two sheeting plates 1 facing each other (although only one sheeting plate has been shown), guide supports 2 and tightening arrangements 3 cooperating with the sheeting plates 1.
In detail, the sheeting plates 1 consist of perpendicular steel sheet hollow sections 4 in the shape of a box or C- shaped in its cross section and arranged one beside the other, which have been welded together into plate bodies and whose longitudinal axes have been disposed perpendicularly.
Every guide support 2 consists of a fork-shaped body, made up of a leg 5 and a leg 6 with the leg 5 being of a box section or similar section. The leg 5 is guided as a gliding element in one of the hollow sections 4 and will be called an inside leg. The other or outside leg 6 of the guide supoprt 2 is in the form of a U-shaped or C- shaped section carrier. Effectively, at least the outside leg is longer than the height of the sheeting plate 1 and may be sharpened on the bottom.
The upper ends of the legs 5, 6 project above the upper edge of the sheeting plate 1 and are connected rigidly with one another at their uppermost part. Between the two legs 5, 6 there is a space of somewhat more than the thickness of the wall of the sheeting plate 1, which spacing is just sufiicient to make possible a relative movement between said plate 1 and the guide support 2.
The shoes 7, 7' of the tightening elements 8, 8' are guided in the outside leg 6. Preferably two shoes 7, 7' disposed one above the other are connected rigidly with one another. As shown in FIG. 2, this can be accomplished by forming both shoes 7, 7' from one piece. Another advantageous design, shown in FIG. 4, consists in the fact that the two shoes 7, 7' are connected firmly together by opposed spindles 9, 9' disposed axially in relation to one another and threaded in an elongated nut 10 in the form of a pipe. As a result, the two shoes 7, 7 can be firmly maintained at a certain spacing. It is also possible to use the tightening elements 8, 8' individually by omitting the connecting nut 10.
As is shown in the drawings, every shoe 7, 7' includes a dumbbell-like body, one part 1-1, 11 of which is guided in the outside leg 6 of the guide support 2, while the other part 13, 13' being connected thereto via an intermediate piece 12, for example in the form of a shaft butt, with the part 11, 11' disposed outside the guide support 6. These elements 13', 13' are enclosed in respective pressure housings 14, 14 open on one side, which housings are disposed at the ends of the tightening elements 8, 8'. Each pressure housing is rigidly connected with either a righthanded or left-handed spindle 15, which is surrounded by a pipe-like nut 16, which; in turn, has projecting pegs 17 or surfaces for the action of a suitable adjusting tool. The construction of the tightening arrangement is not the subject of this invention but is the subject of my aforementioned U.S. application Ser. No. 793,409 and need not 'be described here in more detail.
In orer to avoid tilting the tightening arrangement in the case of a perpendicular shifting of the shoes 7, 7 in the guide support 2, element 13 ,13' has been configurated, for practical purposes, as shown in FIG. 2, to be cylindrically or semi-cylindrically, the axis thereof running horizontally.
In operation, first of all the sheeting plates 1 are driven into the bottom of the ditch after the excavation of the ditch has been partially completed and along the two ditch walls. For example, the shovel of an excavator is used as a drop hammer. Then the inside leg 5 of each of a pair of guide supports 2 is introduced into one of the hollow sections of two opposing sheet plates 1. Each guide support 2, if need be, can be driven into the bottom of the ditch. Then the shoes 7, 7 are introduced into the outside legs 6 of the guide support 2 and are connected with the opposing shoes 7, 7' by the tightening elements '8, 8. The tightening devices 3 formed in this manner may then be used to press the shoes 7, 7' against the guide supports 2 and the sheeting plates 1 through operation of the nuts 8, 8'.
If it is necessary to free the open space of the ditch for the installation of large pipes, then the guide supports 2 themselves can be pulled somewhat upwards without the tightening devices 3 acting on the sheeting plates 1, having to be materially loosened. Also, the tightening arrangements 3 themselves can be vertically adjusted and arranged in height according to the necessary arrangement.
The new building element will permit a many sided use of its indvidual elements and makes possible a simpler method of operation. The building element is not limited to a certain design of the tightening arrangements 3 but may utilize other known designs. Also, the sheeting plates 1 and the guide supports 2 can have a dilferent profile within the framework of the inventive concept. For example, the sheeting plates 1 also can consist of simple U-sections whose legs point toward the inside of the ditch, whereby the guide supports can be formed, for example, with a double T or similar profiles, which on the one hand are guided in the profiles of the sheeting plate 1 and on the other hand constitute a guide for the shoes 2, 2 of the tightening arrangements 3.
While preferred forms and arrangements of parts have been shown in illustrating the invention, it is to be clearly understood that various changes in details and arrangement of parts may be made without departing from the spirit and scope of this disclosure.
1. Building set for the sheeting of service ditches and the like consisting of sheeting plates to be arranged in pairs and of tightening devices attachable between said plates, said tightening devices being formed of axially adjustable tightening elements having shoes disposed at their ends, and the shoes are received in perpendicular guide supports fitting against the sheeting plates, characterized in that the sheeting plates are formed of elongated sections rigidly connected with one another, and whose longitudinal axes are intended to be essentially perpendicular, and the guide supports are guided for relative axial shifting movement relative to respective ones of said sheeting plate sections and in relation to the sheeting plates as a whole.
2. Building set according to claim 1, characterized in that the sheeting plates are hollow and in that the guide supports are developed as fork-shaped bodies with parallel legs, one of which legs is guided slidingly in one of said hollow sections of the respective sheeting plate and the other leg is adapted to be disposed inside a ditch profile and constitute a guide for said shoes of the respective tightening devices.
3. Building set according to claim 2, characterized in that at least said other leg of each guide support is longer than the height of the sheeting plate.
4. Building set according to claim 2, characterized in that each tightening device includes two of said shoes guided in each guide support with the shoes in each guide support being connected rigidly with one another.
5. Building set according to claim 4, characterized in that the two shoes are connected rigidly with one another by means of an intermediate element adjustable in length.
6. Building set according to claim 4, characterized in that the shoes are configurated generally like dumbbells with one element received in a pressure housing of said tightening devices and a second element received in said guide support and one shoe element of each shoe is of a generally cylindrical configuration with its cylinder axis disposed horizontally.
7. Building set according to claim 1, characterized in that at least said other leg of each guide support is longer than the height of the sheeting plate.
8. Building set according to claim 1, characterized in that each tightening device includes two of said shoes guided in each guide support with the shoes in each guide support being connected rigidly with one another.
9. Building set according to claim 8, characterized in that the two shoes are connected rigidly with one another by means of an intermediate element adjustable in length.
10. Building set according to claim 1, characterized in that the shoes are configurated generally like dumbbells with one element received in a pressure housing of said tightening devices and a second element received in said guide support and one shoe element of each shoe is of a generally cylindrical configuration with its cylinder axis disposed horizontally.
References Cited UNITED STATES PATENTS 554,680 2/1896 Haentges 6l--39 UX 918,046 4/1909 Hartnagel 6139 3,420,065 1/1969 Holl 6141 A DENNIS L. TAYLOR, Primary Examiner US. Cl. X.R. 61-41 A