RU2199622C2 - Strengthening of water-way structures - Google Patents

Abstract

FIELD: highway engineering; construction of water-ways on automobile rods. SUBSTANCE: water-way structure includes chute laid on preset slope. Water-way structure is additionally provided with transversal ridges and tooth-shaped projecting platforms which are used as bases for transversal ridges. Walls of chute have recesses immediately before transversal ridges; level of adjacent upper tooth-shaped projecting platform is higher than point of adjoining next transversal ridge located lower on slope. Dynamics ensures jet directivity of water flow and protection of structure when it cannot pass rated flow of water. EFFECT: enhanced reliability and durability. 5 dwg

Description

 The invention relates to the field of road construction and can be used in the construction of drainage structures on roads.

 There is a known drainage system (see AS 1606567 dated 02.11.87), in which, in order to increase the reliability of operation, a blind area is proposed to prevent erosion of the soil and, in general, the prevention of flooding of the main tray is achieved.

 However, the proposed system is cumbersome and expensive.

 Also known is a method of constructing a drainage structure (see Patent 2025551 of March 11, 91), in which geotextile materials are used and cost and labor costs of building a drainage structure are reduced.

 However, this method is applicable only on dense soils.

 The closest to the proposed is a drainage structure (see A. p. 949041 from 06.16.80), which achieves an increase in the operational reliability of the drainage structure by the presence of an additional tray.

 However, the indicated closest analogue assumes the operation of the operation service, which is difficult in the winter-spring period (drifts of snow, ice, snow tinctures) and is not economically feasible.

 The present invention is characterized in that the drainage structure is additionally equipped with transverse ridges and tooth platforms, which are the base of the transverse ridges, recesses are made on the walls of the tray immediately in front of the transverse ridges, while the level of the adjacent upper tooth platform is higher than the adjoining place of the next transverse ridge, downhill.

The proposed technical solution is illustrated by the drawings:
figure 1 shows a General view of the structure,
figure 2 - transverse ridge and its variant,
figure 3 - condition for compliance with the slope,
4 is an increase in throughput.

 During the operation of drainage type structures, there are often cases of erosion of soil adjacent to the structure, which facilitates the penetration of water into the base of the tray and causes deformation and then destruction of the structure. The erosion and destruction of the structure sometimes occurs like an avalanche. When constructing standard (according to a standard design) drainage structures on roads, special attention is paid to the quantitative and temporary factors of water collection from the surface and its discharge. In order to ensure the long-term operation of the drainage system, it is necessary to pay sufficient attention to such factors as the maximum use of the natural landscape of the area, the influence of various climatic and meteorological conditions, and the nature of the soil.

 The present invention is aimed at preventing the destruction of a drainage structure, taking into account the above factors at the construction stage.

 Depending on the slope of the relief (usually a ravine), the physical and mechanical properties of soils, as well as the length of the erected drainage structure in the places selected for a particular construction case, a structural element is made from monolithic reinforced concrete - a transverse ridge 1 (see figures 1 and 2 ), which is a solid reinforced concrete monolithic structure with a tray and consists of two vertical walls separated by a recess. The notch completely matches the cross section of the tray. The vertical walls have bevels directed towards the middle of the indicated element, with slopes that repeat the natural transverse slope of the ravine and slightly protrude above the ground.

 In order to ensure maximum protection of the structure from erosion, it is advisable to carry out landscape construction along the existing duct of the ravine with a minimum change in the natural topography. The dimensions and non-essential structural features of the transverse ridge are selected for a specific construction case, the number of transverse ridges being erected and the distance between them are determined taking into account the general slope of the relief and the physical and mechanical characteristics of the soil for a specific construction case.

 The base of the transverse ridge is the platform-tooth 2, which is structurally associated with the transverse ridge and is made of reinforced concrete (see figures 1 and 2). The upper surface of the platform-tooth is performed with a slope close to horizontal. The size (width) of the platform-tooth is comparable with the height of the tray, and the basic requirements for the platform-tooth follow from the consideration of the operation of the structure as a whole, in the following description, in dynamics.

 On the walls of the tray (see figure 1), immediately in front of the transverse ridges, recesses 3 are made, which are recesses of the shape of a semicircle, with the lower part located at the level adjacent to the tray of soil.

 During the construction of a drainage structure of the type described, a slope is maintained so that the level of the adjacent upper tooth-site is higher than the junction of the next transverse ridge located below the slope (see Fig. 3). The specified slope provides drainage and prevents soil erosion.

 In dynamics, the work of a drainage structure with the proposed structural elements is as follows. The main (transit) stream of water flows through the main tray. Water flowing along the tray (local lateral inflow), along the adjacent soil is directed by the transverse ridge 1 into the tray through the recesses 3, thereby ensuring streamline flow and protection from small erosion. In cases of frost formation, clogging or siltation of the living section of the tray, the main stream water that has exceeded the limits of the tray is also directed by a transverse ridge through the recesses into the tray, protecting the adjacent soil from strong erosion.

 To exclude irreversible destruction of the structure, in extreme cases, when the drainage structure cannot let in a flow exceeding the calculated one, the live section of the tray is increased by filling the transverse ridges adjacent to the tray with water, and the water collapsing onto the tooth platform 2 extinguishes its energy, and the platform -tooth prevents erosion of soil under the base of the tray. The size of the platform-tooth is set taking into account the specified circumstances.

 The proposed elements, the transverse ridge and the tooth platform, also perform the following function, namely, they serve as stops of the structure from significant precipitation and sliding of the structure on strong slopes, since the emphasis is on the horizontal construction of the tooth platform and the proposed structure is integral.

 The technical and economic characteristics of the proposed technical solution are justified by many years of practical experience of the authors, pay off the complexity of the construction with maximum security of the structure, ensuring its reliability and durability.

Claims (1)

 A drainage structure containing a tray laid on a given slope, characterized in that it is additionally equipped with transverse ridges and tooth platforms, which are the base of the transverse ridges, recesses are made on the walls of the tray immediately in front of the transverse ridges, while the level of the adjacent upper tooth platform is higher than the place adjoining to the tray of the next transverse ridge, which is lower downhill.

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