RU222480U1 - DRAIN TRAY - Google Patents

Abstract

The utility model relates to the field of hydraulic engineering, in particular to drainage structures for draining storm and surface water, and can be used in the construction of transport structures. The drainage tray is made of polymer concrete, a material based on a fine fraction of mineral rock and a polymer thermosetting binder. The shape of the drainage tray is U-shaped in cross-section with a base and side walls. The walls are inclined outward at an angle of 25-35°. In plan, the tray has an extension on one side for joining similar sections of the tray into a single structure. The dimensions of the tray are: A and B - top width, h - height, L - length. To strengthen the structure of the tray, polymer concrete is reinforced with a glass roving mesh, which protrudes beyond the edges of the overhangs by 150-200 mm and is used to fix the tray in a monolithic concrete frame.

Description

The utility model relates to the field of hydraulic engineering, in particular to drainage structures for draining storm and surface water from atmospheric precipitation, and can be used in the construction of railways, highways and bridge structures.

The B-6 reinforced concrete drainage channel is widely known, made according to the series 3,503.1-66 “Prefabricated reinforced concrete products for drainage structures on highways”, adopted as a prototype. Concrete trays are made of concrete of class not lower than B20 and are reinforced with a frame made of reinforcement of class A240. The manufacturing method is semi-dry vibrocompression, which ensures high strength of the products. Additional additives are added to the concrete mixture to increase the water resistance of concrete. Telescopic concrete trays B-6 have a U-shaped cross-section and an expansion of one side in plan, which ensures mutual penetration of the trays into each other and form a hermetically sealed connection. Each subsequent tray is inserted into the previous one - the narrow part into the wide one. The dimensions of such a product are 540×250×540 mm and a total weight of 50 kg. When installing trays, lifting equipment must be used, which is a disadvantage. The main disadvantage of concrete trays is their low durability, which is 10-15 years, since they practically do not withstand chemically aggressive environments.

Concrete trays have been replaced by polymer-composite ones based on thermoplastics. The patent is known (RU 40059 U1 class IPC E01F 5/00 date of publication 08/24/2004). The disadvantages of this solution are the instability of the material (polypropylene), to temperature changes and direct solar radiation, which leads to rapid embrittlement of the thermoplastic and deformation of the product.

Lightweight drainage trays from patents are also known (RU 50548 U1 class IPC E01F 5/00, publication date 01/20/2006), (RU 2285766 C1 class IPC E01F 5/00, E01C 11/22 publication date 10/20/2006 ), (RU 2669597 C1 cl. IPC E01F 5/00, E01C 11/22 publication date 10/12/2018), (RU 2344220 C2 cl. IPC E01F 5/00, E01C 11/22 publication date 01/20/2009 ), (RU 2375515 C2 class IPC E01F 5/00, E01C 11/22 publication date 12/10/2009), in the form of a trough-shaped body with a connecting widening along one of its ends. The closest in design are patent RU 151170 U1, 03/27/2015, it is made rectangular in cross section, as well as patent JPS 50157027 U dated 12/25/1975, in which the entire tray is made in the form of a lattice frame and reinforced with additional rods.

The rigidity of the tray structure, made of thin thermosetting plastics with reinforcement from glass, basalt and carbon fibers, is ensured by the arrangement of a system of longitudinal and transverse stiffeners located outside the tray body. These technical solutions have high operational reliability and wide application possibilities. According to the results of accelerated tests, durability reaches 50 years. When laying such trays in a trench, as well as during operation, hitting the trays with a hammer or other objects, as well as mechanical impacts that could lead to damage to the tray, are not allowed. It should be noted that a drawback of the drainage tray design is that they are not repairable; if damaged, a complete replacement of the section is required.

The purpose of the utility model is to create drainage trays that operate over the entire range of operating temperatures, have structural strength and rigidity against mechanical and static impacts, and also ensure their resistance to chemically aggressive environments.

To achieve this goal, the drainage tray (1) is made of polymer concrete, a material based on a fine fraction of mineral rock and a polymer thermosetting binder. The cross-sectional shape of the drainage tray is U-shaped with a base and side walls that are inclined outward at an angle of 25-35°, which increases the throughput of the section. In plan, the tray has an extension on one side for joining similar sections of the tray into a single structure. The dimensions of the tray are: A and B - top width, h - height, L - length. To strengthen the structure of the tray, the polymer concrete is reinforced with a mesh (2) made of glass roving, which protrudes beyond the edges of the overhangs of the polymecrete tray by 150-200 mm and is used to fix the tray in a monolithic concrete frame.

On site, drainage trays are installed as follows. A trench is dug, and a bedding of compacted fine-grained material (sand) is placed on top. Then the installation of trays (I) begins in such a way that each subsequent tray is inserted into the previous one - the narrow part into the wide one, which forms a sealed lock. Temporary fixation of the trays is carried out by installing fiberglass anchors (1) through the reinforcing mesh (2). Then the gaps between the soil (5) and the tray (1) are filled with a rigid mixture of concrete (4), so that the mesh (2) and the anchor (3) are completely immersed in it.

Brief description of the drawings.

Figure 1 shows the design of a drainage tray with a cross section.

Figure 2 shows the attachment point for the tray in the design position on the slope.

Claims (1)

A drainage tray containing a U-shaped body in cross section with a base and side walls, characterized in that the material used is a composition in the form of a polymer concrete mixture based on a fine fraction of mineral rock and a polymer thermosetting binder, which is reinforced with a mesh of glass roving for fixation it in a monolithic concrete frame, with a protrusion beyond the edges of the overhangs of the polymer concrete tray by 150-200 mm.

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