GB2044831A

GB2044831A - Profile member

Info

Publication number: GB2044831A
Application number: GB7939944A
Authority: GB
Original assignee: HAENSCH P
Current assignee: HAENSCH P
Priority date: 1978-12-27
Filing date: 1979-11-19
Publication date: 1980-10-22
Also published as: FR2445433A1; BE874478A; DE7838440U1

Abstract

A profile member for sealing shuttering panels for use in mine workings. The profile member (10, 20), of hard resilient plastics material e.g. PVC, has a transverse web (11, 21) from which extends lower wall portions (12, 13 or 22, 23) extending in cross section substantially equal to or longer than the width of the web (11, 21) and at least one upper wall portion (14, 24). A second upper wall portion (15) or ledge (25) is provided to cover the inner side of the joint between two adjacent shuttering panels (16, 17). <IMAGE>

Description

SPECIFICATION Profile member for sealing shuttering panels in mine workings A profile member according to the present invention is a component of a shuttering construction kit (according to DOS 26 07 084), which is used as backfilling of a mine workings supported by arched timber sections.

This shuttering panel kit also includes shuttering panels, preferably having a length of 2.65m and a height of 0.5m, so-called traverses of U-shaped cross-section, the length of which is substantially equal to the height of the shuttering panels. The shuttering panels are placed on position over the whole arch against several timber sections and retained by securing by wedging to overlapping parts of the tenterhook trusses. The space between the shuttering panels and the mine face is filled by pumping in liquid or viscous back filling composition (grouting, anhydride).

When the backfilling composition has set, the shuttering is removed. The wedges are driven home in projecting parts of strips on the working side, which strips have holes formed therein. The strips are accommodated by a bearing gap between two shuttering panels.

The object of the invention resides in the sealing of the horizontal gaps between a lower shuttering panel and an upper shuttering panel to prevent leakage of the backfilling composition under pressure.

According to the present invention there is provided a profile member for sealing shuttering panels in mine sections, in which the profile member is formed of a hard resilient plastics material and has the same length as the shuttering panel, the profile member has a straight web the width of which corresponds to the thickness of a panel with which it is to be used, two downwardly extending wall portions, substantially rectangular in cross-section, are connected to said web, the height of which is substantially equal to or slightly longer than the width of web, and at least one upwardly extending wall portion substantially of rectangular cross-section is connected to said web.

Such a profile member is mounted on the top of a shuttering panel after a panel has been erected and before applying the tenterhook trusses, whereby the whole upper edge of the shuttering panel is covered. The two lower walls of the profile member, due to their inherent resilience, are securely clamped, and a tight fit of the profile member is obtained.

Then, during assembly, the tenterhook trusses are mounted, the strips of the tenterhook trusses are supported on the web of the profile member, whereby corresponding pieces are broken out of the upper wall or walls or the ledge. After attaching the tenterhook trusses, the upper shuttering panel is inserted between the upper walls or the wall and the ledge, whereupon in known manner wedging of the shuttering panels is effected.

Sealing of the filling side is produced especially by the upper and lower walls on the filling side, which, on account of their inherent resilience and on account of the forces created through the wedging, firmly abut against the shuttering panels in a region of 2-3 cm above and below the joint. On the workings side the joint is covered at least in the region of a cover ledge. Due to the fact that one profile rod have an h-shaped profile has an upper lip missing and only a low cover ledge is provided, the upper shuttering panel is always readily mounted even when used shuttering panels are used which are already somewhat distorted and sometimes have bulges in the longitudinal direction. In accordance with a further embodiment of the innovation two upper walls are formed on the profile member so that an H-shaped section is produced.The two upper walls, however, are somewhat shorter than the lower walls. Shuttering panels which not yet exhibit extensive bulges in the longitudinal direction may be readily inserted between the two upper lips.

Due to the inherent resilience of the lips and due to the tensioning forces, which originate from the wedging, tolerances are also compensated which occur due to the angling of the shuttering panels following the arc.

The present invention will be described further, by way of example with reference to the accompanying drawings, in which: Figure 1 shows in perspective a segment of an H-shaped profile section member; Figure 2 shows a segment of an h-shaped profile section member; Figure 3 is a perpendicular section through the region of the joint between two shuttering panels, sealed by abn H-shaped profile member; and Figure 4 shows a similar section using an hshaped profile member.

The profile members 10, 20 are made of a hard, resilient, plastics material, preferably hard PVC. They are as long as the associated shuttering panels, preferably 2.650m. In view of the use in a mine working, the plastics material has to be fire inhibiting and must not be subject to electrostatic charges.

The profile member 10 according to Fig. 1 has a transverse web 11 the width of which corresponds to the thickness of the shuttering panel, and has two downwardly extending wall portions 1 2 and 1 3 connected thereto and also two upwardly extending wall portions 14 and 1 5. The two lower wall portions 1 2 and 1 3 are slightly longer than the width of web 11, whilst the two upper wall portions 14 and 1 5 are slightly shorter than the width of the web 11. In any case, the spacing between the walls 12 and 13, and 14 and 15 is somewhat reduced towards their ends.

The profile member 20 according to Fig. 2 (h-shape) has a transverse web 21 and also has two downwardly extending wall portions 22 and 23 connected thereto, but only one upwardly extending wall portion 24. Instead of a second upwardly extending wall portion, a low ledge 25 is formed extending from the web 21.

Fig. 3 shows, on a natural scale, a part of the lower shuttering panel 1 6 and a part of an upper shuttering panel 1 7 in cross-section.

The shuttering panels 1 6 and 1 7 abut against a flange 1 8 of an arched working profile. The space between the shuttering panels and the mine working is to be filled with a backfilling composition 19, e.g. a grouting or anhydride.

The shuttering panels are retained by fixed wedges on the workings profile 1 8. So-called tenterhook trusses are thus used which on the workings side are hooked into the workings profiles. Each tenterhook truss has a steel grip 26 which is located in a joint between two shuttering panels and protrudes on the working side. After laying traverses, not shown, substantially parallel to the working profile a wedge is driven home in the protruding part of a strip 26.

Before applying the tenterhook trusses a profile member 10 or 20 is mounted on the lower shuttering panel 16. During assembly, the tenterhook trusses are latched and, in oreder to make room for the strips 26 of the tenterhooks, corresponding pieces are broken out of the upper walls 1 4 and 1 5 or from the wall 24 and the ledge 25. Then the upper shuttering panel 17 is inserted between the two upper walls 14, 1 5 or, when using a profile member 20, between the ledge 25 and the upper wall 24. The wedges are then driven home parallel to the working profile after applying traverses. The joint between the two shuttering panels 1 6 and 1 7 on the filling side are covered by a lower wall and an upper wall. The walls abut with seal against the shuttering panels, subject to the pressing forces produced under wedging, in the region of 2-3 cm from the bearing joint.

In the H-shaped profile according to Fig. 3, the joint is also overlapped by the same amount on the working side by the lips 1 2 and 1 5. When using a profile rod 20 of Figs.

2 and 4, the joint is covered by the ledge 25.

Claims

1. A profile member for sealing shuttering panels in mine sections, in which the profile member is formed of a hard resilient plastics material and has the same length as the shuttering panel, the profile member has a straight web the width of which corresponds to the thickness of a panel with which it is to be used, two downwardly extending wall portions, substantially rectangular in cross-section, are connected to said web, the height of which is substantially equal to or slightly longer than the width of web, and at least one upwardly extending wall portion substantially of rectangular cross-section is connected to said web.

2. A profile member according to claim 1, in which the lower wall portions are substantially longer than the width of rib and two substantially shorter upper-lips are provided.

3. A profile member as claimed in claim 1 or.2 wherein the profile member is 2.65m in length.

4. A profile member substantially as herein described with reference to and as illustrated in Figs. 1 and 3 or Figs. 2 and 4 of the accompanying drawings.