FI74092C - Linear drainage element to be used in soil, ground and water single building - Google Patents

Description

74092

Linear drainage element used in civil engineering.

Linear formwork elements are provided at the end of the field, in the ground and in the water.

The invention relates to a linear drying element with a central zone for dewatering and a surrounding filter layer. The element is preferably used for the manufacture of drainage systems for drainage and irrigation purposes in connection with earth, soil, water and road construction, as well as in agriculture.

Known drainage systems consist of perforated or non-perforated pipes which are either in contact with each other at their ends as such or connected to each other via sleeves and surrounded by a filtration layer.

The manufacture of such drainage systems involves a high consumption of materials and labor. In addition, the most commonly used ceramic pipes are susceptible to rupture and lead to difficult transport operations.

In addition to these, drainage pipes are known which are already surrounded by a filtration layer before installation. In this case, various raw materials are used as the filtration layer. For example, a felted fluffy fiber according to DE-AS 1 269 578 or a short straw as described in DE-OS 2 017 732 is used for this purpose. The disadvantage of these drainage pipes is the large manufacturing work, in addition to which their installation without a trench is usually impossible or requires complex equipment. DE-OS 2 027 724 discloses a drying line which is manufactured immediately before placement by placing a suitable loose material on a strip-like body and shaping it into a conductor.

DE-OS 1 928 471 describes uprights consisting of prefabricated, water-permeable hoses which, after installation on the ground, are filled with a powdery or granular substance. The disadvantage of this method is the large amount of bulk used in the manufacture of the drying lines and the special preparation of the bulk material required. Observation of the desired structure is not possible. DE-PS 1 140 878 / DE-OS 1 948 859 and DE-OS 1 459 400 disclose drying pipes in which the pipes are made of strip during the installation phase. The large installation workload is reduced by using a trenchless installation. The disadvantage is that the formation of the pipes cannot be controlled during the installation work / in which case, however, deformations of the pipes made of film strips cannot be avoided. When pipelines are usually devoid of an additional filter around them, the pipes clog quickly. In addition, these pipes require complex installation equipment.

All of the drying pipes shown have the disadvantage of the formation of deposits due to the air circulation in the pipeline in connection with ferrous water.

The technical object which the invention seeks to solve is thus to provide a linear drying element which can be manufactured under quality and construction control and which is fracture-proof, stable in size, coiled, flexible and suitable for trenchless installation, the structure being anti-rotation and provides an efficient cross-section for water transport.

According to the invention, the object is solved in that the drying element is a rope-like structure, the central zone being a water-permeable longitudinal capillary structure and the filter layer

The structure according to the invention is obtained, for example, in such a way that the indestructible waste arising from the production of planar pattern-cut products is crimped in a string and fastened with a middle filtering layer and an outer water-absorbing shell by known casing techniques.

It 3 74092 as a linear drying element. For enveloping, the web or strip-like shell can also be wound helically around the middle layer.

The outer water-absorbent shell consists of a plurality of strip-like or string-like textiles, either helically surrounding the middle layer or parallel to it in the longitudinal direction, and held in place by a highly permeable and thus high-productivity sheath. In this case, the outer shell has a simultaneous pre-filter effect and releases water to the heart according to the drainage of this water, and by retaining the precipitated ingredients prevents clogging of the middle filter layer and precipitation in the conductive heart.

The middle filter layer consists of a tubularly twisted web or overlapping strip-like textiles that completely surround the core. The layer has a porous structure that can be adapted to filter requirements.

The inner water-permeable core part may consist of crumpled planar, e.g. shaped, textile pieces, chopped textiles or several braids with a longitudinal capillary structure. Thanks to the tight arrangement, air circulation and thus precipitation due to air is prevented. Compared to the known drainage fillings, the longitudinal Kapil structure according to the invention enables efficient directed water transfer also in vertical use. The middle filterable layer and the water-permeable core are formed of non-rotting material.

The invention will now be described by means of an application:

The core of the linear drying element is formed by a water-permeable longitudinal capillary structure. This is advantageously achieved by, e.g. Particularly advantageous variants are obtained by using worn, chain-crocheted sacks of film-like materials, which suitably have longitudinal grooves, whereby many longitudinal capillaries are formed in the creasing. At the same time, the crimping results in a string-like seal that mainly retains its shape. The mainly water-repellent structure, on the other hand, provides sufficient water transfer capacity.

The core may also consist of a plurality of dense water-permeable strands having a longitudinal capillary structure. Through the cavities created between the strings, the longitudinal capillary structure is enhanced.

The middle filterable layer surrounding the core in a tubular or strip-like overlap may be a chain-crocheted material, a nonwoven mat, or other porous non-rotting planar material. In this case, the pore size of the filter layer must be dimensioned in accordance with the relevant requirements.

The outer water-absorbent shell may be a partially rotting, absorbent and water-permeable linear or planar textile, preferably a secondary raw material, located parallel to the longitudinal direction.

The retention of the rope structure is preferably achieved by a known sheathing technique utilizing additional fibers or yarns. However, it is also possible to use the line-shaped shell or parts thereof as a casing system in such a way that it helically surrounds the middle layer.

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Claims (6)

5,74092 A linear drying element for civil, foundation and hydraulic construction with a central zone for dewatering and a surrounding filter layer, characterized in that it is a rope-like structure, the central zone consisting of a water-permeable longitudinal capillary structure and a longitudinal filter layer of non-rotting textile web overlapping at the edges, and these are surrounded by an outer water-absorbing shell. A linear drying element according to claim 1, characterized in that the outer water-absorbing shell consists of a plurality of strip-like or string-like water-permeable partially decaying textiles parallel to the layer to be filtered and attached by additional shell fibers. A linear drying element according to claim 1, characterized in that the outer water-absorbing shell consists of a plurality of strip-like or string-like water-permeable partially decaying textiles which wrap around the layer to be filtered. A linear drying element according to claim 1, characterized in that the core consists of a crumpled, non-rotting water-permeable planar textile. A linear drying element according to claim 1, characterized in that the core consists of a plurality of water-permeable, non-rotting longitudinal capillary strings. 6 Patentkrav 74 0 9 2