CN114293582A - Damping structure of concrete gravity dam in multiple earthquake areas - Google Patents
Damping structure of concrete gravity dam in multiple earthquake areas Download PDFInfo
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- CN114293582A CN114293582A CN202210172058.9A CN202210172058A CN114293582A CN 114293582 A CN114293582 A CN 114293582A CN 202210172058 A CN202210172058 A CN 202210172058A CN 114293582 A CN114293582 A CN 114293582A
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- dam
- partition
- gravity dam
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- seismic
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- 230000005484 gravity Effects 0.000 title claims abstract description 36
- 239000004567 concrete Substances 0.000 title claims abstract description 21
- 238000013016 damping Methods 0.000 title claims abstract description 13
- 238000005192 partition Methods 0.000 claims abstract description 37
- 239000002893 slag Substances 0.000 claims abstract description 11
- 238000005553 drilling Methods 0.000 claims abstract description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 239000011382 roller-compacted concrete Substances 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims 2
- 238000010521 absorption reaction Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 4
- 230000003313 weakening effect Effects 0.000 abstract description 3
- 238000005336 cracking Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The invention discloses a damping structure of a concrete gravity dam in a multi-earthquake area, wherein at least one row of partition holes which are distributed in an arc shape on the plane and penetrate into bedrock are respectively arranged at positions which are not less than 100m away from the upper and the downstream sides of a dam body of the gravity dam, the partition holes are arranged along the left and the right sides of the dam body, the plane is of a convex mirror shape, the convex faces towards the outer side of the dam body of the gravity dam, the drilling depth of each partition hole is 0.5-0.6 times of the height of the dam, a PVC pipe with the diameter not less than 80% of the partition hole diameter is arranged in each partition hole, the PVC pipe is filled with slag, and two ends of the PVC pipe are plugged with plugs. By utilizing the reflection principle of the convex mirror, the seismic waves meet the arc-shaped partition hole and then are reflected back, and are superposed, neutralized and reduced with the next new seismic wave crest, so that the aim of weakening the seismic wave disasters is fulfilled; in addition, the relatively loose slag in the hole can also weaken the propagation of seismic waves. Compared with other damping methods, the damping device is safe, reliable, economical, reasonable and high in operability, and can effectively prevent the gravity dam from cracking.
Description
Technical Field
The invention relates to a damping technology, in particular to a damping structure of a concrete gravity dam in a multi-earthquake area.
Background
As an ancient and modern dam type, the concrete gravity dam has the advantages of simple construction technology, high construction speed, strong adaptability to various geological conditions, safety, reliability and the like, and occupies an important place in the dam construction of China and even the world, and is more and more widely applied along with the continuous development of the concrete technology. Because water resource distribution in China is unbalanced, more than 80% of water energy resources are concentrated in western high-altitude multi-earthquake areas, and the earthquake-resistant safety of the dam is one of the most critical problems in dam design in China. The concrete dam inevitably cracks when encountering strong earthquake; at present, the earthquake-proof measures adopted by projects are mainly to configure earthquake-proof reinforcing steel bars, but tests prove that the width of cracks can be reduced by configuring the earthquake-proof reinforcing steel bars, the development of the cracks is effectively controlled, and the cracks cannot be avoided.
Disclosure of Invention
The invention aims to solve the technical problem of providing a damping structure of a concrete gravity dam in a multi-earthquake area, which is safe, reliable, economical, reasonable, strong in operability and capable of effectively reducing and avoiding the occurrence of cracks of the concrete gravity dam.
In order to solve the problems, the technical scheme adopted by the invention is as follows: the utility model provides a damping structure of many earthquake regions concrete gravity dam, on apart from the gravity dam body, the downstream side is not less than 100m position respectively arrange at least one row of wall hole that is the arc distribution in the plane, go deep into the basement rock, every row of wall hole is arranged along dam body left and right sides bank direction, be convex surface mirror type on the plane, the convex surface is towards the gravity dam body outside, the drilling depth of wall hole is 0.5 ~ 0.6 times of dam height, place the PVC pipe that the diameter is not less than 80% of wall aperture in the wall hole, it is intraductal to fill with the slay, PVC pipe both ends are with the end cap shutoff.
The gravity dam body is a normal concrete gravity dam or a roller compacted concrete gravity dam.
The diameter of the partition hole is
The spacing is 3-3.5 m, the upstream and downstream are both arranged in two rows, the row spacing is 2.5m, the front row and the rear row are arranged in a crossed manner, and the partition holes at the two ends of each row of partition holes are close to the left bank and the right bank of the dam body.
The partition holes are arranged in opposite arcs on the upper plane and the lower plane so as to reflect the seismic waves back by utilizing the convex mirror reflection principle.
The slag is densely filled to increase the reflection, refraction and diffraction of seismic waves
The invention has the beneficial effects that: according to the invention, by utilizing the reflection principle of the convex mirror, seismic waves are reflected back after encountering the arc-shaped partition hole and are superposed, neutralized and eliminated with the next new seismic wave crest, so that the aim of weakening seismic wave disasters is fulfilled; in addition, the relatively loose slag in the hole can also weaken the propagation of seismic waves. Compared with other damping methods, the damping device is safe, reliable, economical, reasonable and high in operability, and can effectively prevent the gravity dam from cracking.
Drawings
Fig. 1 is a schematic structural view of a shock-absorbing structure of a concrete gravity dam for multiple seismic regions according to the present invention.
FIG. 2 is a top plan view of the shock absorbing structure of the multi-seismic area concrete gravity dam of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in figures 1-2, the damping structure of the concrete gravity dam in the multi-earthquake area is characterized in that at least one row of partition holes 1 which are distributed in an arc shape on the plane and penetrate into bedrock are respectively arranged at the positions, which are not less than 100m away from the upper side and the downstream side of a dam body 5 of the gravity dam, each row of partition holes are arranged along the directions of the left bank and the right bank of the dam body, the plane is in a convex mirror shape, the convex surface faces the outer side of the dam body 5 of the gravity dam, the drilling depth of each partition hole is 0.5-0.6 times of the height of the dam, a PVC pipe 2 with the diameter not less than 80% of the partition hole diameter is arranged in each partition hole 1, slag 3 is filled in each PVC pipe 2, and two ends of each PVC pipe 2 are blocked by plugs 4.
The gravity dam body 5 is a normal concrete gravity dam or a roller compacted concrete gravity dam.
The diameter of the partition hole 1 is
The spacing is 3-3.5 m, the upstream and downstream are both arranged in two rows, the row spacing is 2.5m, the front row and the rear row are arranged in a crossed manner, and the partition holes at the two ends of each row of partition holes 1 are close to the left bank and the right bank of the dam body. The partition holes 1 are arranged in opposite arcs on the upper plane and the lower plane so as to reflect the seismic waves 7 back by utilizing the convex mirror reflection principle. The slag 3 is densely filled to increase the reflection, refraction and diffraction of seismic waves
According to the invention, by utilizing the reflection principle of the convex mirror, the seismic wave 7 is reflected back after encountering the arc-shaped partition hole, and is superposed, neutralized and reduced with the wave crest of the next new seismic wave 7, so that the aim of weakening the disaster of the seismic wave 7 is fulfilled; in addition, the relatively loose slag in the hole also weakens the propagation of the seismic waves 7. PVC pipes 2 with the diameter not less than 80% of the partition aperture are placed in the partition holes 1 to form different materials, and the different materials reflect, refract and diffract seismic waves. Two ends of the PVC pipe 2 are plugged by plugs 4 to prevent water in a river channel from entering the pipe, and reflection, refraction and diffraction to seismic waves are increased.
The working process of the invention is as follows:
(1) firstly, excavating a dam foundation and pouring a dam body;
(2) drilling partition holes at the upstream and downstream of the dam 180m away from the dam body, wherein the hole diameter is 100-120 mm, the distance is 3-3.5 m, two rows of partition holes with the row distance of 2.5m are adopted at the upstream and downstream, the partition holes in the front row and the rear row are arranged in a crossed manner, the partition holes are arranged in a convex mirror manner on the plane, the convex faces the outer side of the dam body of the gravity dam, and the drilling depth is 0.5-0.6 times of the height of the dam;
(3) and (4) putting the PVC pipe with the closed bottom end into the partition hole, filling slag layer by layer in the pipe and compacting, and sealing the top end of the PVC pipe after the slag is filled to the pipe orifice.
(4) And performing surface plugging on the partition holes.
The whole process is completed.
The above examples are only for illustrating the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the same, and the scope of the present invention is not limited by the examples, i.e., the equivalent changes or modifications made in the spirit of the present invention disclosed are still within the scope of the present invention.
Claims (5)
1. The damping structure of the concrete gravity dam in the multi-earthquake area is characterized in that at least one row of partition holes (1) which are distributed in an arc shape on the plane and penetrate into bedrock are respectively arranged at positions which are not less than 100m away from the upper side and the downstream side of a dam body (5) of the gravity dam, each row of partition holes are arranged along the direction of the left bank and the right bank of the dam body, the plane is of a convex mirror shape, the convex surface faces the outer side of the dam body (5) of the gravity dam, the drilling depth of each partition hole is 0.5-0.6 times of the height of the dam, a PVC pipe (2) with the diameter not less than 80% of the partition aperture is arranged in each partition hole (1), the interior of each PVC pipe (2) is filled with slag (3), and the two ends of each PVC pipe (2) are blocked by plugs (4).
2. The shock-absorbing structure of concrete gravity dam for multiple earthquake areas according to claim 1, wherein said gravity dam body (5) is a normal concrete gravity dam or a roller compacted concrete gravity dam.
3. The seismic isolation structure of a concrete gravity dam with multiple seismic zones as claimed in claim 1, wherein said partition holes (1) have a diameter of
The spacing is 3-3.5 m, the upstream and downstream are arranged in two rows with the row spacing of 2.5m, the front row and the rear row are arranged in a crossed manner, and the partition holes at the two ends of each row of partition holes (1) are close to the left bank and the right bank of the dam body.
4. The seismic isolation structure of a concrete gravity dam with multiple seismic zones as claimed in claim 1, wherein said cut-off holes (1) are arranged in opposite arcs on the upstream and downstream planes so as to reflect seismic waves (7) back by using the principle of convex mirror reflection.
5. The seismic absorption structure of a concrete gravity dam according to claim 1, wherein said slag (3) is densely filled to increase the reflection, refraction and diffraction of seismic waves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210172058.9A CN114293582A (en) | 2022-02-24 | 2022-02-24 | Damping structure of concrete gravity dam in multiple earthquake areas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210172058.9A CN114293582A (en) | 2022-02-24 | 2022-02-24 | Damping structure of concrete gravity dam in multiple earthquake areas |
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| CN114293582A true CN114293582A (en) | 2022-04-08 |
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| CN202210172058.9A Pending CN114293582A (en) | 2022-02-24 | 2022-02-24 | Damping structure of concrete gravity dam in multiple earthquake areas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116397942A (en) * | 2023-06-06 | 2023-07-07 | 河北雷格科技发展有限公司 | Anti-seismic online water quality monitoring station house |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1527370A1 (en) * | 1987-10-09 | 1989-12-07 | Всесоюзный проектно-изыскательский и научно-исследовательский институт "Гидропроект" им.С.Я.Жука | Concrete gravity dam for seismic regions |
| CN103410177A (en) * | 2013-07-26 | 2013-11-27 | 上海岩土工程勘察设计研究院有限公司 | Forming method of underground shielding vibration-isolation structure |
| CN106988350A (en) * | 2017-04-27 | 2017-07-28 | 北京市市政工程设计研究总院有限公司 | A kind of intensive drilling anti-explosion shock structure of back-up sand vibration isolation campshed |
| CN107227805A (en) * | 2017-07-19 | 2017-10-03 | 武汉大学 | The method of construction of underground vibration damping wall |
| CN109441109A (en) * | 2018-12-03 | 2019-03-08 | 三峡大学 | A kind of shock insulation buffer area reducing or eliminating seismic energy and method of construction |
| CN110397091A (en) * | 2019-08-08 | 2019-11-01 | 河北建筑工程学院 | Ancient building shock insulation barrier |
| CN209837120U (en) * | 2019-01-14 | 2019-12-24 | 华东交通大学 | Arc-shaped and variable-depth shock insulation ditch |
-
2022
- 2022-02-24 CN CN202210172058.9A patent/CN114293582A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1527370A1 (en) * | 1987-10-09 | 1989-12-07 | Всесоюзный проектно-изыскательский и научно-исследовательский институт "Гидропроект" им.С.Я.Жука | Concrete gravity dam for seismic regions |
| CN103410177A (en) * | 2013-07-26 | 2013-11-27 | 上海岩土工程勘察设计研究院有限公司 | Forming method of underground shielding vibration-isolation structure |
| CN106988350A (en) * | 2017-04-27 | 2017-07-28 | 北京市市政工程设计研究总院有限公司 | A kind of intensive drilling anti-explosion shock structure of back-up sand vibration isolation campshed |
| CN107227805A (en) * | 2017-07-19 | 2017-10-03 | 武汉大学 | The method of construction of underground vibration damping wall |
| CN109441109A (en) * | 2018-12-03 | 2019-03-08 | 三峡大学 | A kind of shock insulation buffer area reducing or eliminating seismic energy and method of construction |
| CN209837120U (en) * | 2019-01-14 | 2019-12-24 | 华东交通大学 | Arc-shaped and variable-depth shock insulation ditch |
| CN110397091A (en) * | 2019-08-08 | 2019-11-01 | 河北建筑工程学院 | Ancient building shock insulation barrier |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116397942A (en) * | 2023-06-06 | 2023-07-07 | 河北雷格科技发展有限公司 | Anti-seismic online water quality monitoring station house |
| CN116397942B (en) * | 2023-06-06 | 2023-09-22 | 河北雷格科技发展有限公司 | Anti-seismic online water quality monitoring station house |
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Application publication date: 20220408 |
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