Stone blocking grate type three-dimensional roughening method for damming

A three-dimensional, grid-type technology, applied in the field of interception, can solve the problems of threatening the safety of construction personnel and mechanical equipment, affecting the operation and scheduling of the power grid in the basin, and the high loss rate of interception materials, so as to shorten the closing time, ensure the safety and practicality of interception strong effect

Inactive Publication Date: 2015-01-07
SICHUAN UNIV +2
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the ultra-high closure hydraulic index, that is, the flow velocity is greater than 8m / s, the drop is greater than 10m, and the single-width power is greater than 120t·m / (m·s), the closure project needs to be combined with the control discharge of the upstream power station. But it will affect the operation and dispatch of the entire river basin power grid
During the period of regulation and closure, the throwing intensity is required to be very high, and the amount of artificial interception materials to be used is high, so not only is the cost high, the construction is difficult, but also the loss rate of the interception materials during this period is high, and the embankment head It is prone to collapse under the action of water flow, threatening the safety of construction personnel and mechanical equipment, and the risk of closure failure is extremely high

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
  • Stone blocking grate type three-dimensional roughening method for damming
  • Stone blocking grate type three-dimensional roughening method for damming
  • Stone blocking grate type three-dimensional roughening method for damming

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The engineering overview of embodiment 1, embodiment 2, embodiment 3 and comparative example 1 is as follows:

[0024] A power station adopts diversion in stages, the floor elevation of the three-stage diversion open channel is 982m, the elevation of the overflow weir crest is 994m, the height difference between the two reaches 12m, and the interception flow rate is 650m 3 / s, in the third phase of closure, the overflow weir can only play the role of diversion after the closure of the mouth of the dragon reaches a certain range and the water level of the reservoir reaches the height of the weir crest. At the same time, the closure of the project is affected by the topography, and double dikes are unconditionally arranged, resulting in a water velocity of 10.01m / s, a drop of 7.6m, and a single-width power of 240t·m / (m·s), making closure difficult.

[0025] Aiming at the above-mentioned projects, the shut-off simulation tests of Example 1, Example 2, Example 3 and Compara...

Embodiment 2

[0030] In this embodiment, a stone barrier 3 is set in the section of the intercepting Longkou 6 along the downstream of the embankment 2, perpendicular to the guide wall of the open channel and 50m away from the guide wall. The rock barrier is an array structure composed of a plurality of rock piles 7. The height of the embankment is 20m, and the height of the rock barrier = 0.8 times the height of the embankment = 16m. The arrangement of the array structure composed of a plurality of stone-blocking piles 7 is as follows: each stone-blocking pile in any row of two adjacent rows of stone-blocking piles is arranged corresponding to the center of the corresponding gap between the stone-blocking piles in the other row, correspondingly Each stone-blocking pile in any row of adjacent two rows of stone-blocking piles is arranged corresponding to the center of the corresponding gap between the stone-blocking piles in the other row. The number of columns of the array structure is 3 co...

Embodiment 3

[0033] In this embodiment, a stone barrier 3 is set in the section of the intercepting Longkou 6 along the downstream of the embankment 2, perpendicular to the guide wall of the open channel and 50m away from the guide wall. The rock barrier is an array structure composed of a plurality of rock piles 7. The height of the embankment is 20m, and the height of the rock barrier = 0.8 times the height of the embankment = 16m. The arrangement of the array structure composed of a plurality of stone-blocking piles 7 is as follows: each stone-blocking pile in any row of two adjacent rows of stone-blocking piles is arranged corresponding to the center of the corresponding gap between the stone-blocking piles in the other row, correspondingly Each stone-blocking pile in any row of adjacent two rows of stone-blocking piles is arranged corresponding to the center of the corresponding gap between the stone-blocking piles in the other row. The number of columns of the array structure is 5 colu...

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 provides a stone blocking grate type three-dimensional roughening method for damming. According to the stone blocking grate type three-dimensional roughening method for damming, a stone blocking grate is arranged at the downstream position along a berm in a damming colure gap area and prevents damming materials from running off, the stone blocking grate is an array structure composed of multiple stone blocking piles, the height of the stone blocking grate is 0.4 to 0.8 time that of the berm. According to the optimal arrangement mode of the array structure composed of the multiple stone blocking piles, any one of every two adjacent columns of stone blocking piles are arranged at the positions corresponding to the centers of gaps between the stone blocking piles of the other column, any one of every two adjacent rows of stone blocking piles are arranged at the positions corresponding to the centers of gaps between the stone blocking piles of the other row. By the adoption of the stone blocking grate type three-dimensional roughening method for damming, the wastage rate of the damming materials can be reduced during closure of a high-difficulty damming closure gap, the economical efficiency of a damming project is improved, the flow speed, the fall and the unit stream energy of the closure gap are reduced, and the safety of damming and successful damming are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of interception in water conservancy and hydropower projects, and in particular relates to a three-dimensional roughening method for interception of river courses and river engineering, and has a relatively high hydraulic index for the interception of a dragon mouth. Background technique [0002] In river engineering, especially in the construction of water conservancy projects, closure is a key link in engineering construction, and difficult closure is the top priority. Generally, the discriminant indicators for difficult closure are: high flow velocity (flow velocity greater than 6m / s), large drop (drop greater than 6m), and large single-width power (single-width power greater than 80t·m / (m·s)). For projects where a single index exceeds the standard by 5% to 10%, although the broken line embankment described in the patent CN201010129949.3 can be used to intercept the flow. However, after entering the Long...

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): E02B3/00E02B7/00
CPCE02B3/00E02B7/00
Inventor 雷运华张建民郭建和银登林彭勇曹钺刘国勇何小泷李明辉
Owner SICHUAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products