SU1021692A1 - Channel built-up facing deformation seam - Google Patents

Abstract

DEFORMATION SEAM OF THE CHANNEL COVERING COLLECTION, COMPRESSED j | {s1.HS.I- | y-. ... j S iC VV. ; - :; J - ;; .., -is- -. I ShK4YO th I holding a filler located in the cavity of the seam, and an impervious screen with folds of individual film panels connected in the region of the cavity of the seam and attached by means of anchor ribs to the abutting facing elements, characterized in that simplification of the fabrication process of the seam, the film of the film at the site of the seam cavity are overlapped and provided with anchor ribs embedded in the filler, and folds are formed on the border between the ends of the joined elements and filler.

Description

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This invention relates to channel impervious devices, namely, expansion joints of prefabricated linings.

Designs of joints of prefabricated linings are known, in which the sealing of the butt joints is carried out with the help of various kinds of mastics, gaskets, membranes, keys, core tapes, etc. one.

However, they did not find their industrial application due to the complexity of manufacturing, the high cost, the scarcity of the materials used, and most importantly because of their unreliable work. Over time, under the influence of natural factors in which canal lining works, multiple alternate freezing and thawing, water saturation and desiccation, solar radiation and ions of salts and alkalis, stray currents, gases, as well as under the influence of constantly acting and repeatedly subjected to expansion and the narrowing of the butt space from changes in air temperature to 4-6 mm all known designs of butt joints are destroyed. None of the known butt joint designs satisfies the requirements for maintaining its operability with mutual displacements of prefabricated cladding elements under the effect of deformations of the soil foundation up to 150-200 mm.

Closest to the invention is a deformation slot of a team of channel lining, including a filler located in the cavity of the crevice and an anti-seepage screen with folds of individual film panels connected in the section of the cavity of the crevice and attached by means of anchor ribs to the elements of the facing facing 2.

The disadvantages of the known technical solution are low operational reliability and complicated manufacturing techniques of the deformation groove.

The purpose of the invention is to increase the operational reliability and simplify the production technology of the seam.

This goal is achieved by the fact that the film sheets at the site of the seam cavity are overlapped and provided with anchor ribs embedded in the filler, and folds are formed at the boundary between the ends of the joined elements and the filler.

The drawing shows the expansion joint, cross section.

The deformation shield includes an anti-filtration screen consisting of

Two bent forged polyethylene strips 1 embedded in the factory during the manufacture of concrete slabs 2 with anchor ribs 3. The joint cavity is filled with cement mortar 4, which monoliths the anchor ribs 3 of the free ends of the film, and thereby forms an anti-filter screen. The anti-filtration screen also has folds 5 located at the interface between the plates 2 and the filler 4. The thickenings 6 in the upper part of the anchor ribs 3 ensure the exclusion of contact filtration and a better adhesion of the ribs 3 to the concrete plates 2 and cement mortar 4. The thickening 7 in the lower part of the anchor edge provides vertical stability of these edges 3 along

0 relative to the film itself. The distance between the anchor ribs is taken in the range of 20-30 mm.

The expansion joint works as follows.

5 In case of deformations — mutual longitudinal or vertical movements of two adjacent plates 2 of the facing — there is no leakage (breaks in the integrity of the strip screen) of the joint butt, as in this case

0, the folds 5 are straightened and thus ensure the integrity of the polymer screen 1. The possible amount of mutual displacements of the prefabricated elements 2 of the facing can be up to 200 mm with a maximum height of folds of 5 to 50 mm. Larger than 50mm

 the height of the folds 5 is impractical, since in this case the folds 5 reach the top of the plates, which are usually 60 mm thick and are subject to destruction.

e In addition, for its implementation, the proposed construction does not require the creation of additional technical means, does not complicate, but simplifies the construction technology of prefabricated facings. The production of profiled (ribbed) polyethylene was mastered by our industry more than 10 years ago and it can be easily established at each of the plants that produce products from polyethylene.

Claims (1)

DEFORMATION SEAM OF THE CHANNEL COLLECTIVE FACING, containing a filler located in the seam cavity, and an anti-filter screen with folds of separate film panels connected to the seam cavity section and attached by means of anchor ribs to the mating facing elements, characterized in that, in order to increase the operational reliability and simplification of the technology for the manufacture of the seam, the film strip in the area of the seam cavity are overlapped and equipped with anchor ribs embedded in the filler, and folds are formed on the gran it between the ends of the joined elements and the filler. Od SO yo