Movable permeable pile spur dam and its operation method

Abstract

The invention discloses a movable permeable pile spur dike and an operation method thereof. The pile spur dike comprises a fixed rail, a plurality of moving rails, and a plurality of movable permeable piles arranged on the fixed rail and the plurality of moving rails , multiple pressure sensors and flow meters arranged at each monitoring point on the outer wall of each movable permeable pile, and a control platform; the control platform performs analysis and calculation based on the monitoring data from each pressure sensor and each flow meter, and adjusts each Move the track and the position of each mobile permeable pile so that the flow velocity and spur pressure at each monitoring point are less than the corresponding flow velocity threshold and pressure threshold, and the spur permeability is within the set range. The invention is applicable to various river conditions, and adaptively adjusts the water permeability of the spur and the shape of the spur according to the change of the flow velocity of the water flow and the pressure of the dam body, thereby effectively improving the stability of the spur and the application effect of ecological friendliness.

Description

technical field [0001] The invention belongs to the technical field of water conservancy engineering, and in particular relates to a movable permeable pile spur dam and an operating method. Background technique [0002] A spur dam is a hydraulic structure widely used in river regulation and maintenance. One end of it is connected to the embankment, and the other end goes deep into the river, presenting a "T" shape. Due to the lack of water depth in dry seasons, dangerous water flow, dangerous shoals and other obstructions to navigation in natural rivers, as well as coastal erosion, hydraulic structures such as spur dikes are used to alleviate the river bank from being directly eroded by incoming flows. It plays an important role in brush damage, sand attack by beaming water, improvement of waterway, maintenance of river facies, and protection of water ecological diversity. [0003] With the development of the times and the in-depth research on the flow field around the spur...

AI Technical Summary

Problems solved by technology

However, when the environment of the river changes greatly during the year, the operation of the spur dike is not universal because the length of the spur dike is constant and the water permeability of the spur dike is in a fixed range.

In addition, in actual engineering, in order to effectively improve the effect of river channel regulation, a single spur dike will be replaced by a spur dike group, but the backflow area between spur dikes in the spur dike group is fixed, and its adjustment ability is as limited as that of a single spur dike

[0005] Among the existing patented technologies such as CN106677121B, the movable permeable spur dam structure for protecting coastal erosion uses several rows of hollow caissons arranged at intervals to form the spur dam, which has good coastal erosion prevention effect and can also reduce the amount of engineering, but it still does not It has a rapid adjustment response mechanism that can adapt to the change of coastal flow in time; CN109853465A is a self-elevating spur dike that automatically adjusts the height according to the water level. However, after long-term use, spur dikes still cannot avoid problems such as foundation hollowing out and dam instability caused by erosion and erosion.

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