Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Flood discharge hole opening multi-layer asymmetric arrangement method suitable for high arch dams

A layout method and asymmetric technology, applied in arch dams, dams, water conservancy projects, etc., can solve the problems of unable to open the water tongue longitudinally, unable to reduce the energy dissipation pressure of the water cushion pond, unable to ensure sufficient collision of the water tongue in the air, etc. Achieving the effect of reasonable collision angle and avoiding spatial overlap

Inactive Publication Date: 2020-08-07
POWERCHINA HUADONG ENG COPORATION LTD +1
View PDF6 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At the same time, the water tongue cannot be pulled apart longitudinally, causing the water tongue to overlap in the air. At the same time, when the deep holes on the surface of the dam body are combined with flood discharge, the water tongue in the air cannot be guaranteed to fully collide and spread effectively, and the energy dissipation pressure of the water cushion pond cannot be reduced. A multi-layer asymmetric layout method for flood discharge orifices suitable for high arch dams

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Flood discharge hole opening multi-layer asymmetric arrangement method suitable for high arch dams
  • Flood discharge hole opening multi-layer asymmetric arrangement method suitable for high arch dams
  • Flood discharge hole opening multi-layer asymmetric arrangement method suitable for high arch dams

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A multi-layer asymmetric layout method for flood discharge orifices suitable for high arch dams. The dam body orifices are arranged in two layers of surface hole overflow weirs and deep hole overflow weirs. There are 6 surface hole overflow weirs and are arranged along the The center of the arch dam is arranged asymmetrically, and there are 7 deep hole overflow weirs, which are arranged asymmetrically along the center of the arch dam. The surface hole overflow weirs and deep hole overflow weirs are arranged alternately in space.

[0032] Further, preferably, the width of the surface holes is W, and the minimum thickness of the pier between the surface holes is not less than 0.25W.

[0033] Further, preferably, the top of the outlet of the deep hole overflow weir is pressed down in an arc shape, and the height of the outlet is 2 / 3 of the height of the cave body.

[0034] Further, preferably, the plane layout of the deep hole overflow weir and the surface hole overflow we...

Embodiment 2

[0037] Embodiment 2: Based on Embodiment 1, but different again is;

[0038] Further, preferably, the 6 surface hole overflow weirs are arranged asymmetrically according to the angle, 1# and 4# use the surface hole overflow weir outlet and adopt a large depression angle design, the large depression angle is 35°, 2# and 5# surface hole overflow The outlet of the weir is designed with a small angle of 5°. The outlet of the 3# surface hole overflow weir is designed with a small depression angle of 15°. The outlet of the overflow weir of 6# is designed with a medium depression angle of 25°. , the distance between the surface hole overflow weirs with the same or similar outlet angle is two surface hole overflow weirs.

[0039] The present invention adopts 6 surface holes and divides them into three groups: wherein 1# and 4# are designed with a large depression angle at the surface hole outlet, and the depression angle is 35°; 2# and 5# surface hole outlets are designed with a small...

Embodiment 3

[0040] Embodiment 3: based on Embodiment 1 and 2, but different again is;

[0041] Further, preferably, the outlet angles of the seven deep hole overflow weirs are symmetrically arranged, the outlets of 1# and 7# deep hole overflow weirs have a small depression angle, and the small depression angle is 5°, and the outlets of 2# and 6# deep hole overflow weirs The outlet is a small angle of 3°, the outlet of 3# and 5# deep hole overflow weirs is a medium angle of 12°, and the outlet of 4# deep hole overflow weir is a large angle, large The pick angle is 25°, the outlets of the deep hole overflow weirs are located at the same elevation, and the distance between the outlet elevation of the deep hole overflow weirs and the elevation of the top of the surface hole overflow weirs is 6-8W.

[0042] Aiming at the problem of deep hole water tongue dispersion, the present invention arranges the center of the protruding angles of the deep holes symmetrically, wherein the outlets of the 1#...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a flood discharge hole opening multi-layer asymmetric arrangement method suitable for high arch dams, and belongs to the field of water conservancy and flood discharge architectures. The overlapping of trajectory nappes in the narrow space can be effectively avoided through the asymmetric arrangement of surface outlets and the asymmetric arrangement of deep hole planes. When the surface outlets are combined with the deep holes to discharge the flood, collision angles of each nappe in the air are reasonable, the surface outlet large or medium depression angle nappes collide with the deep hole small depression angle nappes, the surface outlet small depression angle nappes collide with the deep hole small jet angle nappes, the surface outlet small jet angle nappes collide with deep hole large jet angle nappes, the collision angles of the nappes in the air are in the range of 35-65 degrees, the collision angles are reasonable, and the nappes can be effectively dispersed.

Description

technical field [0001] The invention relates to the field of water conservancy and flood discharge buildings, in particular to a multi-layer asymmetric arrangement method for flood discharge orifices suitable for high arch dams. Background technique [0002] At present, with the construction of high-head water conservancy and hydropower projects, the height of the arch dam body and the flood discharge flow have been continuously increased, and the dam body undertakes a huge flood discharge task. The rationality of the flood discharge layout is directly related to the stability of the downstream cushion pond and the entire hydropower project. safety. The principle of flood discharge and energy dissipation layout is that the water tongues are fully dispersed without overlapping when the orifice is single-layer flood discharge, and the water tongues collide and disperse to improve energy dissipation efficiency when the dam body is full-power flood discharge. If the symmetrical...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): E02B7/12E02B8/06
CPCE02B7/12E02B8/06
Inventor 徐建荣彭育薛阳胡亚安辜晋德赵建钧王宇安建峰赵建平
Owner POWERCHINA HUADONG ENG COPORATION LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com