SU981498A1 - Method of working a canal by a stream - Google Patents

Description

(54) METHOD FOR DEVELOPING A CHANNEL FLOW

one

The invention relates to hydraulic construction, in particular to the development of canals (ameliorative, river management, etc.) with a water flow.

There is a known method of forming a canal free of charge by a stream of water, including the development of a pioneer trench with the subsequent formation of a channel by supplying water 1 into it.

The disadvantage of this method is the unregulated process of self-leaching of the channel at a limited length, as a result of which an uneven erosion of the pioneer trench and silting of the bottom with erosion products occurs. This method is associated with significant additional costs and labor intensive work due to the need to refine the Russians. la to finite sizes.20

There is also known a method for developing a channel by a flow, including the installation of a constraining device in the channel with its subsequent movement 2.

However, this method does not ensure the development of a channel along its length, since the removal of eroded rocks is not ensured.

 The purpose of the invention is to increase the efficiency of the process and prevent silting up of a large channel.

The goal is achieved by the fact that the constraining device is installed at a depth at which speeds form in the constricted part of the channel exceed speeds of erosion for this category of soil, and its movement is carried out continuously afloat against the current, with the removal of soil eroded into the nanoscapes receiver.

On. FIG. 1 shows a diagram of a section of a pioneer trench with a constraining device, a longitudinal section along the axis; in FIG. 2 - the same, plan view.

The channel design method is performed as follows.

Claims (2)

A pioneer trench 1 is laid along the canal route, into which a 3 S S flow of water is passed, at the end of the pioneer trench 1 a constraining device 2 is immersed in the flow, which is, for example, a tank filled with ballast. (water, sand, gravel, etc.). The immersion of the device 2 is carried out to a depth that creates an IB formed by the narrowest living cross-section of the velocity flow, contributing to enhanced erosion of this trench soil category in depth and width. As we form a 3, the immersion of the device 2 is controlled in such a way that the resulting ground differential enhances the erosion process in front of the device 2, while coasting the erosion 4 and discharging the erosion material into the nanopath receiver 5 (water, water flow, etc.). this ensures a continuous washout process. After reaching the predetermined depth and width of the erosion in this area, the constraining device 2 moves afloat against the flow. In this way, the development of a route for the entire path of the channel is carried out. In the development of a large canal, the erosion of trenches in width is provided by narashivanie additional sections of the Shy device. The proposed method is economical due to the low labor intensity of the work performed and a significant reduction in construction time due to the achievement of increased erosion at any water consumption in the trench. S The advantages of this method include the fact that it is suitable for the construction of canals for any purpose — land reclamation, when spraying river bends, etc. — practically any carrying capacity and in any categories of soil eroded, both in loose sand and in the USA. zly hard clay Claim method The development of a channel by a flow, including the installation of a constraining device in a channel and its subsequent movement, characterized in that, in order to increase the efficiency of the method and prevent silting up a long channel, the constraining device is installed at a depth at which speeds form in the constricted part of the channel. exceeding the erosion rates for this soil category, and its movement is carried out continuously afloat against the current with the removal of the soil eroded in the nano-sap mnik Sources of information taken by IN attention during the examination 1. Zsenov D., Construction of the Karakum Canal in sandy soils using water flow. Hydrotechnical and amelioration, No. 2, 1961, p. 47-5O. 2. Authors svdedelstvo USSR NO 256646, cl. E 02 B3 / 02, 1966 (prototype). ff / X XXAV // VXXNX / AV // VV S y / Ay / AyvO