CN-122013730-A - Self-collapsing weir structure

CN122013730ACN 122013730 ACN122013730 ACN 122013730ACN-122013730-A

Abstract

The invention provides a self-collapsing weir body structure which is arranged into an open structure capable of freely overflowing and comprises a control section and a chute section, wherein the control section and the chute section are arranged in a chute type foundation of a mountain after excavation, the top of the control section is arranged according to a water retaining height of a reservoir, the control section comprises a detachable overflow weir, a drainage and triggering system and a dismounting device, a main body of the overflow weir adopts a brickwork structure, a reinforced concrete protection layer and a polyurea impermeable layer are sequentially arranged on the surface of the overflow weir, the drainage and triggering system is connected with the dismounting device, an upstream reservoir and a chute section, and the drainage and triggering system is configured to trigger the dismounting device to destroy the overflow weir from the water blocking structure to the water draining structure when the upstream reservoir reaches a preset critical working condition. The invention solves the contradiction between construction engineering investment control and superscalar flood safety control under the superscalar flood condition.

Inventors

ZHU ANLONG
SHA BIN
ZHANG PING

Assignees

中国电建集团华东勘测设计研究院有限公司

Dates

Publication Date: 20260512
Application Date: 20260106

Claims (10)

1. A self-collapsing weir structure is characterized in that the self-collapsing weir structure is an open structure capable of freely overflowing and comprises a control section and a chute section, the control section and the chute section are arranged in a chute foundation of a mountain after excavation, the top of the control section is arranged according to a water retaining height of a reservoir, the control section comprises a detachable overflow weir, a drainage and triggering system and a dismounting device, a main body of the overflow weir adopts a brickwork structure, a reinforced concrete protection layer and a polyurea impermeable layer are sequentially arranged on the surface of the main body of the overflow weir, the drainage and triggering system is connected with the dismounting device, an upstream reservoir and a chute section, and the drainage and triggering system is configured to trigger the dismounting device to destroy the overflow weir to be converted into a water draining structure from a water blocking structure when the upstream reservoir reaches a preset critical working condition.
2. The self-collapsing weir structure according to claim 1, wherein the control section comprises a connection structure arranged at two sides and at the bottom of the overflow weir, a water passing channel connected with the downstream chute section is arranged in the connection structure, a plurality of disassembling cavities communicated with the water passing channel are arranged at the bottom of the overflow weir, the disassembling device is arranged in the disassembling cavities, the elevation of the bottom of the water inlet of the water passing channel is consistent with the warning water level of the upstream water reservoir, and the water outlet is arranged at the downstream of the disassembling cavities.
3. The self-collapsing weir structure of claim 2, wherein a plurality of said detachment cavities are spaced from the bottom of said weir in the direction of the water flow.
4. The self-collapsing weir structure of claim 2, wherein the outlet of the water passage is connected to the downstream chute section by a drain pipe, and the inlet of the water passage is larger than the outlet.
5. The self-collapsing weir structure as set forth in claim 1, wherein a plurality of longitudinally and transversely disposed structural slots are spaced apart within the reinforced concrete protective layer, and a rigid foam board is disposed within the plurality of structural slots.
6. The self-collapsing weir structure of claim 1, wherein anchor bars are provided between the control section and the chute section and the trough foundation.
7. The self-collapsing weir structure of claim 1, wherein the main body of the overflow weir is composed of brickwork with different bonding strengths, the inside of the overflow weir is a low-bonding brickwork, the outside of the overflow weir is a high-bonding brickwork, and the surface of the high-bonding brickwork is provided with the reinforced concrete protection layer.
8. The self-collapsing weir structure as set forth in claim 7, wherein a mesh reinforcement is disposed in the reinforced concrete protective layer and connected to the brickwork by tie bars.
9. The self-collapsing weir structure of claim 1, wherein the control section comprises a control section retaining wall and a control section bottom plate, the chute section comprises a chute section retaining wall and a chute section bottom plate, and the control section retaining wall and the control section bottom plate are in transitional connection with the chute section retaining wall and the chute section bottom plate.
10. The self-collapsing weir structure of claim 9, wherein water stop structures are provided at structural joints between the control section retaining wall, the control section bottom plate, the chute section retaining wall and the chute section bottom plate.

Description

Self-collapsing weir structure Technical Field The invention relates to the technical field of flood discharge engineering, in particular to a self-collapsing weir structure. Background In the field of water conservancy and hydropower engineering, the flood control grade of a reservoir dam is determined according to the engineering scale, the hazard degree and the like, and the flood control grade is respectively provided with a flood design standard (such as 50 years) and a flood check standard (such as 1000 years). In the scheme design and engineering construction process, the scale and the structural strength of the spillway are strictly determined according to the standards, so that flood can be safely discharged and energy can be dissipated in a standard range, and meanwhile, the economic rationality of engineering investment is ensured. However, global climate change causes extreme rainfall events to occur, with a significant increase in the risk of actual floods exceeding the original design criteria (i.e. "superscalar floods"). If the design standard is comprehensively improved for dealing with accidental out-of-standard floods, the dam height, spillway size and structural strength are greatly increased, so that the engineering investment is obviously increased, the long-term utilization rate is low, and the economical efficiency is poor. Disclosure of Invention Aiming at the defects in the prior art, the invention aims to provide a self-collapsing weir structure. The invention solves the contradiction between construction engineering investment control and superscalar flood safety control under the superscalar flood condition. The invention provides a self-collapsing weir body structure which is arranged into an open structure capable of freely overflowing and comprises a control section and a chute section, wherein the control section and the chute section are arranged in a chute type foundation of a mountain body after excavation, the top of the control section is arranged according to the water retaining height of a reservoir, the control section comprises a detachable overflow weir, a drainage and triggering system and a dismounting device, the main body of the overflow weir adopts a brickwork structure, the surface of the overflow weir is sequentially provided with a reinforced concrete protective layer and a polyurea impermeable layer, the drainage and triggering system is connected with the dismounting device, an upstream reservoir and the chute section, and the drainage and triggering system is configured to trigger the dismounting device to destroy the overflow weir to be converted into a water draining structure from the water blocking structure when the upstream reservoir reaches a preset critical working condition. As a preferable technical scheme, the control section comprises connecting structures arranged at two sides and the bottom of the overflow weir, a water passing channel connected with the downstream chute section is arranged in the connecting structures, a plurality of disassembling cavities communicated with the water passing channel are arranged at the bottom of the overflow weir, the disassembling device is arranged in the disassembling cavities, the elevation of the bottom of a water inlet of the water passing channel is consistent with the warning water level of an upstream water reservoir, and a water outlet is arranged at the downstream of the disassembling cavities. As a preferable technical scheme, the bottom of the overflow weir is provided with a plurality of disassembly cavities at intervals in the water flow direction. As a preferable technical scheme, the water outlet of the water passing channel is connected with the downstream chute section through a drain pipe, and the water inlet of the water passing channel is larger than the water outlet. As a preferable technical scheme, a plurality of longitudinally and transversely arranged structural joints are arranged in the reinforced concrete protection layer at intervals, and a hard foam template is arranged in the plurality of structural joints. As a preferable technical scheme of the invention, anchor bars are arranged between the control section and the chute section and between the chute section and the chute foundation. According to the preferable technical scheme, the overflow weir is characterized in that the overflow weir is composed of brickwork with different bonding strengths, the inner part of the overflow weir is a low-bonding brickwork, the outer part of the overflow weir is a high-bonding brickwork, and the surface of the high-bonding brickwork is provided with the reinforced concrete protection layer. As a preferable technical scheme, the reinforced concrete brick is characterized in that a reinforced mesh is arranged in the reinforced concrete protection layer, and the reinforced mesh is connected with a brickwork through lacing wires. According to the preferable technical scheme, the control sect