Staggered pipe buried type permeable spur dike

Abstract

The invention discloses a staggered pipe buried type permeable spur dike. A spur dike body is internally provided with a plurality of sets of communicating steel pipe structures of which the interlayers are arranged in a staggered mode, certain included angles exist between the projections of the steel pipe axes in the horizontal plane and the dike axis, and the projections in the horizontal plane are distributed in the shape like an Arabic number eight; and meanwhile, the bottom of the dike body is provided with concrete sheet piles arranged in a surrounding mode, and the concrete sheet piles are parallel to the dike axis on the upstream and downstream sides of the permeable spur dike and are perpendicular to the dike axis at the head of the dike. Compared with existing permeable spur dikes, the staggered pipe buried type permeable spur dike can better stabilize water flow, weaken vortexes behind the dike and reduce scouring of materials at the head of the dike; and meanwhile, the flow velocity of the bottom layer of the water flow in the downstream position of the spur dike can further be decreased, and sediment deposition is promoted so that sedimentation and beach building can be conducted.

Description

technical field [0001] The invention belongs to the field of river management, and in particular relates to a staggered buried pipe type permeable spur dam structure. Background technique [0002] Groove dam is a type of hydraulic structure used for river regulation. One end of the river bank is connected to the embankment in the shape of a "T", hence the name "groove dam". Spur dikes have multiple functions of river channel regulation. On the one hand, it can protect the river bank from being directly eroded by the incoming flow to avoid scour damage. At the same time, it also has multiple functions such as improving the channel, protecting the river facies and maintaining the diversity of water ecology. Groove dikes are divided into impermeable spur dikes and permeable spur dikes. Most of the existing permeable spur dikes are hydraulic plate permeable spur dikes and shaft pile permeable spur dikes. Compared with non-permeable spur dikes, these two types of permeable spur ...

AI Technical Summary

Problems solved by technology

The water flow passing through the dam body has a relatively high flow velocity at the section near the dam axis on the downstream side. On the one hand, it will cause serious scour of the riverbed, threatening the safety of the engineering structure. On the other hand, the backwater area and flow velocity behind the dam will be reduced range causing unstable disturbances, affecting sedimentation and sedimentation

[0003] Among the existing technical solutions for permeable spur dams, the authorized invention patent ZL201310521749.6 uses several groups of permeable holes with square cross-sections arranged in the horizontal direction. On the one hand, it will cause stress concentration in the permeable holes, threatening the structural safety of the spur dam , on the other hand, the horizontally arranged permeable holes have poor energy dissipation effect on the water flow through the dam

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