SU971984A1 - Apparatus for protecting sea canal against drift - Google Patents

Description

(54) DEVICE FOR PROTECTION OF THE SEA CHANNEL FROM PAYMENT

one

The invention relates to hydraulic engineering and can be used in the design and construction of artificial water approaches to seaports.

A device for protection of the sea channel against sedimentation, made in the form of a sediment trap 1.

Sediment traps are slots in the submerged slope, parallel to the channel axis. These slots intercept a portion along the coastal sediment flow and prevent its sedimentation in the channel. However, after filling the tank, the sediment traps freely cross it and are deposited in the channel.

It is also known a device for protecting the marine channel from breaking, which includes protective piers located on both sides of the channel and protruding into the sea. Sediments accumulate from the external to the channel of the side of the pier. The place of accumulation of sediments is called a pocket or an incoming angle.

B. However, the nano-scavenging effect of the use of moles of known construction is temporary. When filling the sediment pocket, bypass the mole head

and get into the channel. Pocket capacity is not restored. The process of accumulation of sediment in the pocket of the moles is irreversible. Thus, even under the action of agitations, a concomitant erosion, i.e., directed in the direction opposite to the accumulation of sediments, the entire pocket zone is in the wave shadow and is not subjected to - the eroding action of the waves.

To release the pocket capacity and prevent the channel from becoming obstructive, mechanical sediment transfer from one side of the channel to the other is performed depending on the direction of the crush. For this, bypassing is used. Bypassing consists of alluvial installations located on the moles, the suction nozzles of which are directed into the pockets, and pipelines laid from one side of the channel to the other. Accumulating sediments in the pockets are pumped through the pipeline to the opposite side of the channel in the direction of their natural transport 2.

The disadvantages of these devices include the complexity of their operation in the conditions of the storm, when major movements occur

Claims (3)

Claim 1. A device for protecting the sea canal from drift, including protective malls located on both sides of the channel and protruding into the sea, characterized in that, in order to increase the efficiency of protection, it is equipped with breakwaters located parallel to the malls from their outer side at a distance equal to half design wavelengths. 2. The device according to π. I, characterized in that the length of each breakwater is equal to one third of the length of the adjacent pier. 3. The device according to paragraphs. 1 and 2, characterized in that the end face of each breakwater is located in the same plane as the end face of the adjacent pier.