Method for protecting river bank by sand-river pile group and flexible mattresses

Abstract

The invention discloses a method for protecting the river bank by a sand-river pile group and flexible mattresses, which comprises the step of arranging flexible mattress protective structures along the banks of the river, and is characterized in that the pile group consisting of at least two rows of protective piles is also arranged outside the side edge of the river bed in which the flexible mattress protective structure is arranged and used for protecting the river bank. When the method is specifically implemented, the flexible mattress protective structure generally can extend to the position 8 to 17m under the underwater river bed, the protective piles adopt concrete square piles, the lower end of each concrete square pile is rooted in the position about 10m under the bottom of the river bed so as to make the protective pile keep stable, and the height of the upper end of each concrete square file exceeds the design flood level. In the method, the pipe group arranged in the river bed outside the flexible mattresses can make a downstream and dank effect, and make the flow velocity of the water greatly slow down after flowing through the pile group by the streaming function, thereby reducing the scouring capability of the water flow and avoiding the damage to the flexible mattresses so as to achieve good bank protection effect.

Description

technical field [0001] The invention relates to a river bank protection technology, in particular to a method for compound protection of a river bank by a pile group and a soft row of fine sand rivers. Background technique [0002] At present, in the field of river bank protection, there is a protection method using a soft row structure, which is widely used because it has the advantages of not affecting the water flow structure, convenient implementation, and good protection effect. The soft row protective structure is mainly composed of a number of concrete rectangular blocks, and the rectangular blocks are connected by hinges and other components and covered on the river bank to be protected. Usually, the soft row protective structure must be arranged at the end of the river bank to the maximum water level of the river. , extending 8-17 meters into the river bed, which can prevent the river mud under the rectangular block from being washed away by the water flow, and play...

AI Technical Summary

Problems solved by technology

[0003] However, in fine-sand rivers, because the bed sand is very fine and the anti-scourability is low, in some river sections with high flow velocity, gust flow and oblique flow, the river water has great scouring force on the soft body row itself and the bed sand below. Large, often causes the river water to quickly wash away the sediment below the side edge of the river bed, forming a hollow area. As the scope of the empty area gradually increases, a rectangular block of soft bodies located on the side of the river bed will appear. Subsidence, collapse and other phenomena, and then cause the other positions of the soft row to arch, hinge cracking, etc., thus destroying the integrity of the soft row

When the structure of the soft row is destroyed, it will cause the failure of river bank protection