Trajectory energy dissipation and scouring preventing method of spillway of small and medium-sized reservoir

A spillway, small and medium-sized technology, which is applied in the field of deflecting flow, energy dissipation and scour prevention of spillways of small and medium-sized reservoirs, and can solve the problems of dam toe and downstream guide wall easy to be scoured, gravel wear stilling basin, and stilling basin with large engineering volume, etc. problems, to achieve the effect of low operation and maintenance costs, stable water flow, and small engineering volume

A spillway, small and medium-sized technology, which is applied in the field of deflecting flow, energy dissipation and scour prevention of spillways of small and medium-sized reservoirs, and can solve the problems of dam toe and downstream guide wall easy to be scoured, gravel wear stilling basin, and stilling basin with large engineering volume, etc. problems, to achieve the effect of low operation and maintenance costs, stable water flow, and small engineering volume

CN108755618AInactive Publication Date: 2018-11-06广东省水利电力勘测设计研究院有限公司
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  • Trajectory energy dissipation and scouring preventing method of spillway of small and medium-sized reservoir
  • Trajectory energy dissipation and scouring preventing method of spillway of small and medium-sized reservoir
  • Trajectory energy dissipation and scouring preventing method of spillway of small and medium-sized reservoir

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Embodiment Construction

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0036] Such as figure 2 As shown, a small and medium-sized reservoir spillway deflecting energy dissipation and anti-scour method, including:

[0037] Along the flow direction of the overflow tongue, the overflow nose sill, the water cushion pool and the retaining wall are respectively excavated. Among them, the deflecting nose sill is located upstream of the overflow tongue, and the water cushion is located at the scour pit of the overflow tongue. The wall is located downstream of the water tongue. It also includes setting a bottom plate at the bottom of the flow tongue between the flow-deflecting nose sill and the water cushion.

[0038] Among them, the method of excavating the overhanging nose sill, water pad pool and retaining wall is as follows:

[0039] The construction site layout shall be carried out within the range from ...

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Abstract

The invention discloses a trajectory energy dissipation and scouring preventing method of a spillway of a small and medium-sized reservoir. The method comprises the step of correspondingly excavatinga flip bucket, a plunge pool and a retention wall in the flowing direction of a trajectory nappe of the spillway, wherein the flip bucket is at the upstream of the trajectory nappe; the plunge pool ispositioned at a scouring pit of the trajectory nappe; and the retention wall is at the downstream of the trajectory nappe. With the adoption of the method, the energy can be dissipated; the scouringis prevented; and the construction is quick.

Description

technical field [0001] The invention relates to a spillway deflecting energy dissipation technology, in particular to a spillway deflecting energy dissipation and scour prevention method for small and medium-sized reservoirs. Background technique [0002] When the spillway in the water conservancy project discharges water, the potential energy is converted into kinetic energy, which can cause the scour of the downstream river bed, endangering the safety of the spillway and other buildings. The main means of prevention and control of this safety problem is energy dissipation, and the auxiliary measure is anti-shock. At present, the energy dissipation methods commonly adopted are: bottom flow energy dissipation, deflecting flow energy dissipation, and surface flow energy dissipation. [0003] The above several energy dissipation methods have the following problems: [0004] (1) Underflow energy dissipation [0005] Underflow energy dissipation has a long history. It is wide...

Claims

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Application Information

Patent Timeline
06 Nov 2018
Publication
CN108755618A
IPC
E02B8/06
CPC
E02B8/06
Inventors
董良山; 贺小康