CN111733768A - Pier tail structure of double-line water delivery aqueduct - Google Patents
Pier tail structure of double-line water delivery aqueduct Download PDFInfo
- Publication number
- CN111733768A CN111733768A CN202010457361.4A CN202010457361A CN111733768A CN 111733768 A CN111733768 A CN 111733768A CN 202010457361 A CN202010457361 A CN 202010457361A CN 111733768 A CN111733768 A CN 111733768A
- Authority
- CN
- China
- Prior art keywords
- pier
- aqueduct
- tail
- narrow
- narrow tail
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B5/00—Artificial water canals, e.g. irrigation canals
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B5/00—Artificial water canals, e.g. irrigation canals
- E02B5/08—Details, e.g. gates, screens
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention provides a pier tail structure of a double-line water delivery aqueduct, which comprises a narrow tail pier, a middle partition wall, an aqueduct left groove, an aqueduct right groove and an open channel transition section, wherein the aqueduct left groove and the aqueduct right groove are arranged by taking the central line of the middle partition wall as a symmetrical axis, the tail end of the middle partition wall is connected with the narrow tail pier, the narrow tail pier is arranged by taking the central line of the middle partition wall as a symmetrical axis, the middle partition wall, the narrow tail pier and the open channel transition section are all arranged by taking the central line of the middle partition wall as a symmetrical axis, and the width from the head end to the tail end of the narrow tail pier is gradually reduced so as to make the separation of water flow boundary layers attached to. Compared with the traditional double-line aqueduct pier tail structure, the double-line aqueduct pier tail structure has the advantages that the water flow can be prevented from being greatly fluctuated when the aqueduct is used for conveying water, the stress characteristic of the aqueduct structure is improved, and the water conveying capacity of the aqueduct is improved.
Description
Technical Field
The invention relates to the field of water delivery safety of water transfer engineering, in particular to a pier tail structure of a double-line water delivery aqueduct.
Background
The construction of the water transfer project is an important way for solving the problems of insufficient water resources in regions or unbalanced space-time distribution, after the water transfer project is applied, the configuration capacity and the water supply guarantee capacity of the water resources in water-affected regions can be greatly improved, and the economic, social and ecological benefits are very obvious.
In a long-distance and cross-basin large-scale water transfer engineering system, an aqueduct is the most common water delivery cross building, and an aqueduct adopting a double-line double-groove arrangement is also common. According to the conventional design method, the upper and lower streams of a double-line water delivery aqueduct of a large water transfer project are generally connected with a trapezoidal open channel through a gradual change section, and a partition wall between a left double-channel aqueduct and a right double-channel aqueduct generally adopts a semicircular pier head and a semicircular pier tail at the inlet and outlet of the aqueduct.
The inventor of the present application has found through research in the process of implementing the present invention that: during actual operation of a project, a semicircular tail pier 6 (shown in figure 3) is arranged at the rear end of the intermediate wall 2 in the existing design, the water surface of some aqueducts fluctuates greatly during large-flow water delivery, the water flow in the left aqueduct and the right aqueduct fluctuates alternately, and even the water surface in the upstream open channel and the downstream open channel of the aqueducts fluctuates greatly; meanwhile, under the action of water flow fluctuation load, the aqueduct and the open channel are threatened in structure safety and slope stability, and the comprehensive benefit of the whole water transfer project is finally influenced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a pier tail structure of a double-line water delivery aqueduct, so that the phenomenon of large fluctuation of water flow in the aqueduct and an open channel is reduced, the aqueduct and the open channel can deliver water stably, and the water delivery capacity of the aqueduct and the open channel can meet the design requirement.
The technical scheme adopted by the invention is as follows:
the utility model provides a pier tail structure of double-line water delivery aqueduct, includes narrow tail mound, mid-board, aqueduct left groove, aqueduct right groove, open channel transition section, and aqueduct left groove and aqueduct right groove use the central line of mid-board to arrange as the symmetry axis, the narrow tail mound of end-to-end connection of mid-board, narrow tail mound use the central line of mid-board to arrange as the symmetry axis, mid-board, narrow tail mound, open channel transition section all with the central line of mid-board arranges as the symmetry axis, the width of narrow tail mound head end to tail end reduces gradually to make attached in the separation of the rivers boundary layer of the wall of narrow tail mound left and right sides slows down.
Further, the narrow tail pier comprises a head end of the narrow tail pier, a tail end of the narrow tail pier, and a left side surface and a right side surface of the narrow tail pier which are positioned at two sides, the length of the narrow tail pier is d, the width of the head end of the narrow tail pier is b1, the width of the tail end of the narrow tail pier is b2, and the width of the intermediate wall is b 0; the relation between the narrow tail pier width b1 and the intermediate wall width b0 is b 1-b 0; the specific size relationship of the narrow tail pier is as follows: d is more than 1.3b1, b2 is less than 0.2b 1.
Furthermore, the left side surface of the narrow tail pier and the right side surface of the narrow tail pier are planes.
Furthermore, the left side surface of the narrow tail pier and the right side surface of the narrow tail pier are curved surfaces.
Furthermore, the curvature radius R of the curved surface is more than or equal to 3b 0.
Furthermore, the cross sections of the aqueduct left groove and the aqueduct right groove are rectangular or U-shaped.
Furthermore, the open channel transition section is transited from a rectangular section to an inverted trapezoidal section.
The invention improves the downstream semicircular tail pier of the partition wall in the existing traditional double-line water delivery aqueduct, changes the traditional semicircular tail pier into the narrow tail pier, leads the separation of the water flow boundary layers attached to the left side wall and the right side wall of the narrow tail pier to be slowed down, reduces the size and the quantity of single vortexes in the water flow behind the narrow tail pier, leads the energy of the single vortexes not to cause the periodic large fluctuation of the water flow, eliminates the periodic single vortexes shedding formed by the sharp separation of the water flow boundary layers of the left side wall and the right side wall of the semicircular tail pier, and avoids the occurrence of 'karman vortex street' in the water flow of the tail pier and the large fluctuation of the water flow in the aqueduct and the open channel caused; after the invention is adopted, the wave amplitude in the water delivery aqueduct and the open channel can be controlled in a safe range, and the maximum wave amplitude of the aqueduct is reduced by over 80 percent generally; the aqueduct and the water flow in the open channel are stable, which is beneficial to the stability of the side slope of the open channel, the alternating dynamic water load acting on the aqueduct is reduced, and the safety of the aqueduct structure is beneficial; the head loss of the aqueduct section is reduced, and the water delivery capacity of the aqueduct is improved to a certain extent.
Drawings
Fig. 1 is a schematic plan view of a pier tail structure of a double-line water transfer flume provided by the invention;
FIG. 2 is a schematic perspective view of a narrow tail pier according to the present invention;
FIG. 3 is a schematic plan view of a pier tail structure of a conventional double-line water transfer aqueduct;
fig. 4 is a schematic plan view of a pier tail structure of a double-line water transfer flume according to the present invention;
fig. 5 is a schematic plan view of a pier tail structure of a conventional double-line water transfer flume in implementation.
In the figure: 1-narrow tail pier, 2-intermediate wall, 3-aqueduct left groove, 4-aqueduct right groove, 5-open channel transition section, 6-semicircular tail pier, 1-narrow tail pier head end, 1-2-narrow tail pier tail end, 1-3-narrow tail pier left side surface and 1-4-narrow tail pier right side surface.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 2, an embodiment of a pier tail structure of a double-line water transfer aqueduct according to the present invention includes a narrow tail pier 1, a middle partition wall 2, an aqueduct left trough 3, an aqueduct right trough 4, and an open channel transition section 5.
The narrow tail pier 1 is located the end of the intermediate wall 2 and connected together with the intermediate wall, the narrow tail pier 1 is a symmetrical structure, the symmetry axis of the structure is the center line of the intermediate wall 2, the width from the head end to the tail end of the narrow tail pier 1 is gradually reduced, the narrow tail pier 1 comprises a head end 1-1 of the narrow tail pier, a tail end 1-2 of the narrow tail pier, a left side surface 1-3 of the narrow tail pier and a right side surface 1-4 of the narrow tail pier, which are located on two sides, and the left side surface 1-3 of the narrow tail pier and the right side surface 1-4 of the narrow tail pier can be planes or curved surfaces. The length of the narrow tail pier 1 is d, the width of the head end 1-1 of the narrow tail pier is b1, the width of the tail end 1-2 of the narrow tail pier is b2, and the width of the intermediate wall 2 is b 0; the relation between the width b1 of the narrow tail pier 1-1 and the width b0 of the intermediate wall 2 is b 1-b 0; the specific size relationship of the narrow tail pier 1 is as follows: d is more than 1.3b1, b2 is less than 0.2b 1.
The cross section of the aqueduct left groove 3 and the cross section of the aqueduct right groove 4 are identical in size and are both rectangular cross sections or U-shaped cross sections, and the aqueduct left groove 3 and the aqueduct right groove 4 use the center line of the intermediate wall 2 as a symmetry axis.
The open channel transition section 5 is a symmetrical structure, and the symmetry axis thereof is the center line of the intermediate wall 2.
The optimization technical scheme of the invention is as follows: when the left side surface 1-3 of the narrow tail pier and the left side surface 1-4 of the narrow tail pier 1 are changed from a plane to a curved surface, the curvature radius R is more than or equal to 3b 0.
The following is further illustrated by taking a double-line water transfer aqueduct hydraulic model test in a large long-distance water transfer project as an example, and combining the wave results in table 1:
fig. 4 shows an embodiment of a pier tail structure of a double-line water transfer flume of the present invention, and the relevant dimensions are as follows: the aqueduct left groove 3 and the aqueduct right groove 4 are both rectangular sections, and the section size (width multiplied by height) of the groove body is 13.0m multiplied by 7.8 m; the width b0 of the intermediate wall 2 is 5.0 m; the tail end of the intermediate wall 2 is connected with a narrow tail pier 1, the width b1 of the head end 1-1 of the narrow tail pier is 5.0m, and b1 is 5.0m of b 0; the width b2 of the tail end 1-2 of the narrow tail pier is 0.8m, and b2 is 0.8m < 0.2b1 is 1.0 m; the length d of the narrow tail pier 1 is 7.0m, and the d is 7.0m and more than 1.3b1 is 6.5 m; the open channel transition 5 has a length of 60.0 m.
Fig. 5 shows an embodiment of a conventional double-line water-conveying aqueduct pier tail structure, wherein the end of the partition wall 2 is connected with a semi-circular tail pier 6, the radius r of the semi-circular tail pier is 2.5m, and the width b0 of the intermediate wall 2 is 5.0 m.
The test results of two types of hydraulic models of the tail pier structure of the invention and the traditional tail pier structure are compared and shown in the table 1.
TABLE 1 comparison of results of two kinds of tail pier structure water flow wave tests
The results of the study in table 1 show that: the designed flow rate of 340m is conveyed in the aqueduct3(s) and increased flow rate 410m3When the water channel is in a/s state, if a traditional tail pier structure is adopted, the maximum wave amplitude of the transition groove section is 0.86m and 1.04m respectively, and the maximum wave amplitude in the channel is 0.36m and 0.40m respectively; after the tail pier structure is adopted, in aqueduct and channelThe maximum amplitude is less than 0.15 m. Compared with the traditional tail pier structure, the invention reduces the maximum wave amplitude of the aqueduct section by more than 80 percent and reduces the maximum wave amplitude in the channel by more than 60 percent; meanwhile, after the invention is adopted, because the water flow in the aqueduct and the channel is stable, the water level in front of the inlet of the aqueduct is reduced by 0.02m, which is helpful for improving the water delivery capacity.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. The utility model provides a pier tail structure of double-line water delivery aqueduct, includes narrow tail mound (1), mid-board (2), aqueduct left groove (3), aqueduct right groove (4), open channel gradual change section (5), and the central line that mid-board (2) was used in aqueduct left groove (3) and aqueduct right groove (4) is the symmetry axis and arranges its characterized in that: the end-to-end connection narrow tail mound (1) of intermediate wall (2), narrow tail mound (1) use the central line of intermediate wall (2) to arrange as the symmetry axis, intermediate wall (2), narrow tail mound (1), open channel gradual change section (5) all with the central line of intermediate wall arranges as the symmetry axis, the width of narrow tail mound (1) head end to tail end reduces gradually, so that attach in the water flow boundary layer separation of the wall of narrow tail mound (1) left and right sides slows down.
2. The pier tail structure of the double-line water transfer aqueduct of claim 1, wherein: the narrow tail pier (1) comprises a narrow tail pier head end (1-1), a narrow tail pier tail end (1-2), a narrow tail pier left side surface (1-3) and a narrow tail pier right side surface (1-4) which are positioned on two sides, the length of the narrow tail pier (1) is d, the width of the narrow tail pier head end (1-1) is b1, the width of the narrow tail pier tail end (1-2) is b2, and the width of the intermediate wall (2) is b 0; the relation between the width b1 of the narrow tail pier (1-1) and the width b0 of the intermediate wall (2) is b 1-b 0; the specific size relation of the narrow tail pier (1) is as follows: d is more than 1.3b1, b2 is less than 0.2b 1.
3. The pier tail structure of the twin-line water transfer aqueduct of claim 2, wherein: the left side surface (1-3) and the right side surface (1-4) of the narrow tail pier (1) are planes.
4. The pier tail structure of the twin-line water transfer aqueduct of claim 2, wherein: the left side surface (1-3) and the right side surface (1-4) of the narrow tail pier (1) are curved surfaces.
5. The pier tail structure of the double-line water transfer aqueduct of claim 4, wherein: the curvature radius R of the curved surface is more than or equal to 3b 0.
6. The pier tail structure of the double-line water transfer aqueduct of claim 1, wherein: the cross sections of the aqueduct left groove (3) and the aqueduct right groove (4) are rectangular or U-shaped.
7. The pier tail structure of the double-line water transfer aqueduct of claim 1, wherein: the open channel transition section (5) is transited from a rectangular section to an inverted trapezoidal section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010457361.4A CN111733768A (en) | 2020-05-27 | 2020-05-27 | Pier tail structure of double-line water delivery aqueduct |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010457361.4A CN111733768A (en) | 2020-05-27 | 2020-05-27 | Pier tail structure of double-line water delivery aqueduct |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111733768A true CN111733768A (en) | 2020-10-02 |
Family
ID=72647702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010457361.4A Pending CN111733768A (en) | 2020-05-27 | 2020-05-27 | Pier tail structure of double-line water delivery aqueduct |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111733768A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202899094U (en) * | 2012-11-09 | 2013-04-24 | 广东省水利水电科学研究院 | Large-scale gate pier for water gate projects |
| CN103422476A (en) * | 2012-05-23 | 2013-12-04 | 中国水电顾问集团昆明勘测设计研究院 | Multi-channel aeration facility with front oblique tail pier |
| CN104775404A (en) * | 2015-03-26 | 2015-07-15 | 中国水利水电科学研究院 | Steady flow friction reduction absorption basin |
| CN107190711A (en) * | 2017-04-28 | 2017-09-22 | 昆明理工大学 | A kind of combined energy dissipater of suitable high moisture head and small flow flood-discharge energy-dissipating |
| CN110847288A (en) * | 2019-11-27 | 2020-02-28 | 扬州大学 | Middle partition pier of water outlet flow channel of large front-mounted through-flow pump station and design method |
-
2020
- 2020-05-27 CN CN202010457361.4A patent/CN111733768A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103422476A (en) * | 2012-05-23 | 2013-12-04 | 中国水电顾问集团昆明勘测设计研究院 | Multi-channel aeration facility with front oblique tail pier |
| CN202899094U (en) * | 2012-11-09 | 2013-04-24 | 广东省水利水电科学研究院 | Large-scale gate pier for water gate projects |
| CN104775404A (en) * | 2015-03-26 | 2015-07-15 | 中国水利水电科学研究院 | Steady flow friction reduction absorption basin |
| CN107190711A (en) * | 2017-04-28 | 2017-09-22 | 昆明理工大学 | A kind of combined energy dissipater of suitable high moisture head and small flow flood-discharge energy-dissipating |
| CN110847288A (en) * | 2019-11-27 | 2020-02-28 | 扬州大学 | Middle partition pier of water outlet flow channel of large front-mounted through-flow pump station and design method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104179159B (en) | Power station bright flowing full tail water system | |
| CN105155484A (en) | Method for reconstructing temporary diversion tunnel into permanent flood discharge facility | |
| CN204185835U (en) | Power station free pressure flow tail water discharge | |
| CN111733768A (en) | Pier tail structure of double-line water delivery aqueduct | |
| CN209162940U (en) | A kind of fresh-keeping water supply pipe | |
| CN205208586U (en) | Variable cross section flue board that flow equalizes | |
| CN208917799U (en) | A kind of outstanding grid supplementary devices of current stabilization | |
| CN104234019B (en) | Variable-section surge chamber | |
| CN101705676B (en) | Breeches pipe arrangement method in arrangement of high-lift lock unilateral lock wall main corridor | |
| CN204924303U (en) | Open channel flume | |
| CN102650361B (en) | Flat-bottom equal-section steel bifurcated pipe | |
| CN206496131U (en) | New many channel pipeline connecting pieces | |
| CN209603094U (en) | A kind of low velocity fluid energy dissipating flow passage configuration | |
| CN201513667U (en) | Annular pipe decompression device | |
| CN201137055Y (en) | Fan shape disposed shunting pier group | |
| Jian et al. | Impact upon navigation conditions of river reach between the two dams by peak shaving at Three Gorges hydropower station | |
| CN106091383A (en) | A kind of water inlet component improving water tank stratified efficiency | |
| CN203420218U (en) | Bridge drainage elbow | |
| CN109778772B (en) | Joint guiding device for improving flow state of water inlet pool of lateral water inlet pump station | |
| CN211922550U (en) | Improve power station tailrace tunnel open-full flow influence's adverse slope weir structure | |
| CN206408597U (en) | The tail pier and gate pier component of spillway | |
| CN207739232U (en) | A kind of Y type flaring gate piers with stilling pond combined energy dissipation | |
| CN110485362A (en) | More automatic joint debugging formula reservoirs in library | |
| CN204185836U (en) | Variable-section surge chamber | |
| CN216892638U (en) | Device for ensuring low pressure and flexible operation of high-water-head gravity flow water supply engineering |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |