CN110593222B - A curved overflow weir structure for bank spillway - Google Patents
A curved overflow weir structure for bank spillway Download PDFInfo
- Publication number
- CN110593222B CN110593222B CN201910837852.9A CN201910837852A CN110593222B CN 110593222 B CN110593222 B CN 110593222B CN 201910837852 A CN201910837852 A CN 201910837852A CN 110593222 B CN110593222 B CN 110593222B
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- weir
- overflow
- guide wall
- overflow weir
- spillway
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- 238000012876 topography Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
- E02B8/06—Spillways; Devices for dissipation of energy, e.g. for reducing eddies also for lock or dry-dock gates
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/30—Flood prevention; Flood or storm water management, e.g. using flood barriers
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Sewage (AREA)
- Barrages (AREA)
Abstract
The invention discloses a curve overflow weir structure of a bank spillway, which comprises overflow weirs, an outer guide wall and an inner guide wall, wherein the outer guide wall is arranged close to the bank and extends along the terrain, the inner guide wall is close to a riverbed, the axis of the overflow weirs adopts an asymmetric curve, the inner guide wall adopts arc line arrangement, the overflow weirs are arranged in an offset way towards one side of the riverbed, the overflow leading edge length of the overflow weirs is increased, and flood smoothly enters a chute through the overflow weirs during flood discharge. The weir body is deviated to one side of the riverbed, the drainage front edge of the weir body is longer than that of a traditional straight weir, so that the drainage design flow can be ensured, the problems of transverse flow and circulation caused by the side weir can be avoided, and meanwhile, the engineering quantity increase caused by the large-scale overflow of the spillway is avoided. The invention simplifies the structural style of the overflow weir, reduces the construction difficulty, reduces the engineering quantity and the engineering investment, and obtains good social benefit and economic benefit.
Description
Technical Field
The invention relates to a flood discharging facility in water conservancy and hydropower engineering, in particular to a curve overflow weir structure of a bank spillway.
Background
The shore spillway in the hydraulic and hydroelectric engineering comprises an overflow weir, a chute and an energy dissipation facility. Weirs are commonly used in the form of utility weirs, wide top weirs and hump weirs. The shore spillway arrangement is typically positive trough, side trough. The overflow chute of the positive chute type spillway has its chute axis orthogonal to the overflow weir axis, the water flow direction passing through the chute is parallel to the chute axis, and the water flow passing through the chute of the side chute type spillway is nearly perpendicular to the chute axis. The positive weir flow coefficient is slightly larger, the condition of water flow behind the weir is better, the phenomenon of circulation and detouring easily occurs behind the side weir, especially for the low weir and low water head condition, the combination of the positive weir and the side weir is adopted, the stress concentration at the junction of the weir body is realized, the structure of the weir body is complex, and the flow state behind the weir is disordered. The curve overflow weir can be well adapted to the topography and geological conditions, and the drainage capacity is increased and the flow state of water flow behind the weir is relieved under the condition of not increasing the scale of the spillway.
Disclosure of Invention
The invention aims to solve the technical problem of providing a curve overflow weir structure of a bank spillway, which can ensure the overflow capacity, adjust the flow state, and is economical and practical for a water conservancy junction with limited drainage front edge.
In order to solve the technical problems, the technical scheme is that the curve overflow weir structure of the spillway on the bank comprises overflow weirs, outer guide walls adjacent to the bank and extending along the terrain, and inner guide walls adjacent to the riverbed, wherein the axes of the overflow weirs are asymmetric curves, the inner guide walls are arranged in an arc manner, the overflow weir bodies are arranged in an offset manner towards one side of the riverbed, the overflow front length of the overflow weir bodies is increased, and flood smoothly enters a chute through the overflow weirs during flood discharge.
The overflow weir is a practical weir, a wide top weir or a hump weir.
The axial line of the overflow weir is an asymmetric curve and adopts an arc shape, a parabolic shape or an elliptic shape.
The included angle alpha between the axis of the chute and the central line of the overflow weir is 15-45 degrees.
The inner guide wall is arc-shaped, the arc circle center of the inner guide wall is arranged on the extension line of the overflow weir curve circle center, and the upstream extension section L of the inner guide wall is 1-2 times of weir height.
The invention has the beneficial effects that under the condition of not increasing the width of the spillway, the overflow weir is arranged by adopting an asymmetric curve, the arrangement form of the overflow weir is optimized according to local conditions, the axial direction and the front edge length of the overflow weir are only changed, the drainage capacity of the overflow weir is effectively increased, the flow state behind the overflow weir is stably transited, the drainage design flow is ensured, the problems of transverse flow and circulation caused by a side overflow weir are avoided, the structure type of the overflow weir is simplified, the construction difficulty is reduced, the engineering quantity is reduced, and the engineering investment is reduced.
Drawings
Fig. 1 is a schematic plan view of a curved weir structure of a spillway according to the present invention.
FIG. 2 is a schematic A-A cross-sectional view of a curved weir configuration of a spillway according to the present invention.
In the figure, 1-overflow weir, 2-outer guide wall, 3-inner guide wall, 4-chute, 5-chute axis, 6-overflow weir central line, L-inner guide wall extension length and angle between alpha-overflow weir central line and chute axis.
Detailed Description
The invention is described in further detail below with reference to the attached drawings and detailed description:
As shown in fig. 1-2, the curve overflow weir structure of the spillway on the bank comprises an overflow weir 1, an outer guide wall 2 and an inner guide wall 3, wherein the outer guide wall 2 is arranged close to the bank and extends along the terrain, the inner guide wall 3 is close to a riverbed, the axis of the overflow weir 1 adopts an asymmetric curve, the inner guide wall 3 adopts arc arrangement, the overflow weir body is arranged in an offset way towards one side of the riverbed, the overflow front length of the overflow weir body is increased, and flood smoothly enters a chute 4 through the overflow weir 1 during flood discharge.
The overflow weir 1 is a practical weir, a wide top weir or a hump weir.
The axial line of the overflow weir is an asymmetric curve and adopts an arc shape, a parabolic shape or an elliptic shape.
The included angle alpha between the axis 5 of the chute and the central line 6 of the overflow weir is 15-45 degrees.
The inner guide wall 3 is arc-shaped, the arc circle center of the inner guide wall is arranged on the extension line of the overflow weir curve circle center, and the upstream extension section L of the inner guide wall 3 is 1-2 times of weir height.
In a small reservoir junction project, a dam is a homogeneous earth dam, the maximum dam height is 39m, an open type single-hole spillway is adopted for flood discharge, the water head on the dam is 3.4m, the check flood discharge flow is 201m 3/s, and the design flood discharge flow is 91m 3/s. The spillway is limited by the topography, has limited width arrangement and high and steep left side slopes. The positive weir arrangement is adopted, because the weir height is lower, the water head difference is small, the flow coefficient is smaller, if the design is met, the spillway width is increased, the spillway excavation amount is increased, the side slope is increased, and the engineering investment is increased. If the side weir arrangement is adopted, the design of the down-flowing flow is required to be satisfied, the overflow front edge is excessively long, the flow state of water flow behind the weir is disturbed, and the turbulent flow circulation problem is easy to occur. By adopting the combination of the positive weir and the side weir, the stress at the junction of the weir body is concentrated, the structure of the weir body is complex, and the flow state of water flow behind the weir body is more turbulent.
The overflow weir of the invention is adopted. The weir body is directly arranged in the reservoir area, a low practical weir body which is arranged in an asymmetric curve is arranged in the spillway, a longer overflow weir can be arranged in a limited width, the right circular arc guide wall adjusts the inlet water flow state, the water flow state behind the weir is stable when the water level is low and high, and finally the water flow state smoothly enters the spillway. The invention changes the engineering structure type and the water flow state, so that the design engineering is economical and reasonable, attractive and applicable.
The above-described embodiments are only for illustrating the technical spirit and features of the present invention, and it is intended to enable those skilled in the art to understand the content of the present invention and to implement it accordingly, and the scope of the present invention is not limited to the embodiments, i.e. equivalent changes or modifications to the spirit of the present invention are still within the scope of the present invention.
Claims (3)
1. The utility model provides a curve overflow weir structure of bank spillway, including overflow weir (1), close to bank according to outside guide wall (2) and the inboard guide wall (3) that are close to the riverbed that the topography extends to set up, a serial communication port, inboard guide wall (3) adopt the pitch arc to arrange, with overflow weir body to riverbed one side skew arrangement, increase overflow weir body overflow front length, flood passes overflow weir (1) smoothly gets into chute (4) during the flood discharge, the axis (5) of chute and the contained angle alpha of overflow weir central line (6) are between 15~ 45, inboard guide wall (3) are circular-arc, inboard guide wall's pitch arc centre of a circle is on the extension line at overflow weir curve centre of a circle, inboard guide wall (3) upper reaches extension L is 1~2 times height.
2. A curved weir arrangement for a shore spillway according to claim 1, wherein the weir (1) is a utility, broadtop or hump weir.
3. The curved weir structure of a shore spillway according to claim 1, wherein the weir axis is an asymmetric curve, and is circular arc, parabolic or elliptical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910837852.9A CN110593222B (en) | 2019-09-05 | 2019-09-05 | A curved overflow weir structure for bank spillway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910837852.9A CN110593222B (en) | 2019-09-05 | 2019-09-05 | A curved overflow weir structure for bank spillway |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110593222A CN110593222A (en) | 2019-12-20 |
| CN110593222B true CN110593222B (en) | 2025-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910837852.9A Active CN110593222B (en) | 2019-09-05 | 2019-09-05 | A curved overflow weir structure for bank spillway |
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| Country | Link |
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| CN (1) | CN110593222B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113186871B (en) * | 2021-05-10 | 2022-06-07 | 大连理工大学 | Canyon dam beneficial to dredging of floating objects |
| CN118441650B (en) * | 2024-07-08 | 2024-10-15 | 四川大学 | A structure for improving the flow pattern of asymmetric spillway inlet |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587330A (en) * | 2012-02-09 | 2012-07-18 | 中国水电顾问集团西北勘测设计研究院 | Arc-shaped labyrinth weir with downstream dropping slope chute |
| CN203514272U (en) * | 2013-07-22 | 2014-04-02 | 中国水电顾问集团华东勘测设计研究院 | Side-weir-type spillway |
| CN211256913U (en) * | 2019-09-05 | 2020-08-14 | 中国电建集团北京勘测设计研究院有限公司 | Curve overflow weir structure of bank spillway |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1678962A1 (en) * | 1989-09-29 | 1991-09-23 | П.Р. Хлопенков | Spillway dam |
| CN100557141C (en) * | 2007-10-12 | 2009-11-04 | 四川大学 | Diversion devices for river dams and spillways |
| CN101705669A (en) * | 2009-12-07 | 2010-05-12 | 上海交通大学 | Duckbilled thin-plate weir device |
| CN206428677U (en) * | 2017-01-11 | 2017-08-22 | 三峡大学 | A kind of Bank-run Spillway water inlet leads wall construction |
| CN108824365B (en) * | 2018-06-27 | 2020-07-14 | 河海大学 | Double-deck arc riverbed ecological remediation structure |
| CN109778802A (en) * | 2019-03-21 | 2019-05-21 | 中水北方勘测设计研究有限责任公司 | Narrow Valleys, deep tail water, super large discharge per unit width curve gravity dam flood-discharge energy-dissipating structure |
-
2019
- 2019-09-05 CN CN201910837852.9A patent/CN110593222B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587330A (en) * | 2012-02-09 | 2012-07-18 | 中国水电顾问集团西北勘测设计研究院 | Arc-shaped labyrinth weir with downstream dropping slope chute |
| CN203514272U (en) * | 2013-07-22 | 2014-04-02 | 中国水电顾问集团华东勘测设计研究院 | Side-weir-type spillway |
| CN211256913U (en) * | 2019-09-05 | 2020-08-14 | 中国电建集团北京勘测设计研究院有限公司 | Curve overflow weir structure of bank spillway |
Non-Patent Citations (3)
| Title |
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| 岸边溢洪道的进口布置与孔口选择;张文等;《东北水利水电》;19921027(第05期);第26-30页 * |
| 曲线形布置溢流堰的应用及其过流能力的分析;韩瑜等;《西北水资源与水工程》;19970630;第08卷(第02期);第8-14页 * |
| 河岸式无闸溢洪道异型进口段的水力设计方法;王仕筠等;《江西水利科技》;19871001(第03期);第33-56页 * |
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| CN110593222A (en) | 2019-12-20 |
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