CN112554139A - Flexible connection structure for anti-seismic beams in dam of high earth-rock dam - Google Patents
Flexible connection structure for anti-seismic beams in dam of high earth-rock dam Download PDFInfo
- Publication number
- CN112554139A CN112554139A CN202011367788.1A CN202011367788A CN112554139A CN 112554139 A CN112554139 A CN 112554139A CN 202011367788 A CN202011367788 A CN 202011367788A CN 112554139 A CN112554139 A CN 112554139A
- Authority
- CN
- China
- Prior art keywords
- seismic
- steel wire
- wire rope
- beams
- dam
- 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
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/02—Fixed barrages
- E02B7/04—Dams across valleys
- E02B7/06—Earth-fill dams; Rock-fill dams
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/16—Sealings or joints
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention relates to a flexible connection structure for an anti-seismic beam in a high earth-rock dam, and belongs to the technical field of anti-seismic beams in high earth-rock dams in hydropower engineering. The invention comprises at least two anti-seismic beams, wherein each anti-seismic beam is of a prefabricated reinforced concrete structure, a steel reinforcement cage is arranged in each anti-seismic beam, steel wire ropes are embedded in the end surfaces of the abutting ends of the two adjacent anti-seismic beams respectively, each steel wire rope is a U-shaped member, the two ends of each U-shaped member are fixedly connected with the steel reinforcement cage, the bent parts of the U-shaped members extend out of the outer end parts of the anti-seismic beams to serve as connecting joints, and the two connecting joints are connected through steel wire rope clamps. The steel wire rope is a galvanized steel wire rope. The invention has convenient construction and can better adapt to the deformation of the dam body under the earthquake condition.
Description
Technical Field
The invention relates to a flexible connection structure for an anti-seismic beam in a high earth-rock dam, and belongs to the technical field of anti-seismic beams in high earth-rock dams in hydropower engineering.
Background
The western part of China, where the distribution of water energy resources is rich, is a strong earthquake region of earthquakes, the earthquake frequency and intensity are very high, and the earthquake-resistant safety problem of the high earth-rock dam is one of the most prominent problems in the construction of hydropower engineering in the western strong earthquake region of China.
In the earthquake-resistant design of the high earth-rock dam, the top of the dam is a key part of the earthquake-resistant design. Firstly, because the earthquake acceleration response at the top of the dam is the strongest, the 'whiplash effect' of the high earth-rock dam in the earthquake can cause the rock mounds at the top of the dam to be loosened, rolled off, collapsed and even partially shallow sliding, and the integral earthquake-resistant safety of the dam can be endangered by the local damage; secondly, the earthquake settlement at the top of the dam is the main part of the total settlement of the dam body.
According to the similar engineering experience in the past, in the high earth-rock dam engineering built in strong earthquake areas at home and abroad, a reinforced structure is generally adopted within a certain elevation range of the dam crest to increase the earthquake resistance and the overall stability of the dam body. The anti-seismic structural style of arranging the anti-seismic beam system in the rockfill area of the dam body is successfully applied to a plurality of practical projects. Under the earthquake condition, the earthquake action effect is obviously improved after the rockfill at the dam top is vibrated to be loose, and the earthquake-proof beam system can restrain the granular rockfill materials into a whole, so that the rockfill materials at the dam top can be effectively limited from being loose, the earthquake-proof integrity of the dam body is enhanced, and the earthquake-proof beam system has the effects of shock absorption and shock insulation. The anti-seismic beam system is formed by connecting a plurality of groups of single reinforced concrete precast beams, the beam-to-beam connection is formed by winding a plurality of exposed ends of U-shaped steel bars embedded into the anti-seismic precast beams through steel wire ropes, and the U-shaped steel bars are clamped by the steel wire ropes to form dead buckles. The problems with this type of connection are: after the dam stores water, most of the anti-seismic beams positioned at the upstream are positioned below a normal water storage level, the surfaces of exposed reinforcing steel bars in the anti-seismic beams are not provided with protective layers, and the anti-seismic beams are soaked in a reservoir water level for a long time; the structural form of the connection through the steel bars is similar to rigid connection, and the adaptability to dam body deformation under the earthquake condition is not good enough.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the flexible connection structure for the anti-seismic beams in the dam of the high earth-rock dam is convenient to construct and has better adaptability to deformation of the dam body under the earthquake condition.
In order to solve the technical problems, the invention adopts the technical scheme that: the flexible connection structure for the anti-seismic beams in the dam of the high earth-rock dam comprises at least two anti-seismic beams, wherein each anti-seismic beam is of a prefabricated reinforced concrete structure, a steel reinforcement cage is arranged in each anti-seismic beam, steel wire ropes are pre-embedded in the end face positions of the abutting ends of every two adjacent anti-seismic beams respectively, each steel wire rope is a U-shaped member, the two ends of each U-shaped member are fixedly connected with the corresponding steel reinforcement cage, the bent portion of each U-shaped member extends out of the outer end portion of each anti-seismic beam to serve as a connection joint, and the.
Further, the method comprises the following steps: the anchoring length of the steel wire rope embedded into the anti-seismic beam is not less than 30 cm.
Further, the method comprises the following steps: two side edges of the U-shaped component are arranged along the horizontal direction; the U-shaped member is arranged in the center of the end face of the anti-seismic beam.
Further, the method comprises the following steps: the steel wire rope is a galvanized steel wire rope.
The invention has the beneficial effects that: the beams are connected through galvanized steel wire ropes embedded into the anti-seismic beams and clamped by rope clamps. The flexible connection structure is convenient to construct, processing steps such as bending of reinforcing steel bars are not needed, the designed length is directly cut, two ends of the galvanized steel wire rope are embedded into the anti-seismic beam, and the semicircular bent parts are exposed, so that the engineering quantity of multi-strand steel wire ropes for winding the reinforcing steel bars is saved, and the cost is favorably controlled; the flexible connection structure adopts galvanized steel wire ropes, has strong ageing resistance, corrosion resistance and durability, and solves the problem of corrosion of the steel bars under the action of the water level of the warehouse; because the steel wire ropes are more flexible than the steel bars, the flexible connection structure enables the anti-seismic beam system to form a flexible reinforcement system, the deformation of the dam body can be better adapted, the allowable deformation amount of the structure is increased, permanent longitudinal and transverse cracks or pulling-off generated by the dam body are effectively avoided, the connection between the dam body and a rigid building is avoided, the problem that the reinforced concrete beam cannot adapt to the non-uniform natural settlement after the dam is built and the non-uniform permanent deformation caused by an earthquake can be solved, and the risk of earthquake damage of the dam body of the high earth-rockfill dam in a strong earthquake area is effectively reduced.
Drawings
Fig. 1 is a plan-cut sectional layout view of structural reinforcing bars of an earthquake-proof beam in the present invention.
Fig. 2 is a sectional a-a layout view of fig. 1.
Fig. 3 is a schematic view of a connection structure of the seismic beam according to the present invention.
Parts in the figures are labeled: 1-earthquake-resistant beam, 2-steel wire rope, 3-steel wire rope clamp, 4-stress longitudinal bar, 5-stirrup, 6-hanging ring, 7-earthquake-resistant beam bottom and 8-earthquake-resistant beam top.
Detailed Description
The invention is further explained below with reference to the drawings and examples.
As shown in fig. 1 to 3, the anti-seismic beam comprises at least two anti-seismic beams 1, wherein each anti-seismic beam 1 is of a prefabricated reinforced concrete structure, a reinforcement cage is arranged in each anti-seismic beam 1, steel wire ropes 2 are pre-embedded in end faces of the abutting ends of the two adjacent anti-seismic beams 1 respectively, each steel wire rope 2 is a U-shaped member, two ends of each U-shaped member are fixedly connected with the reinforcement cage, the bent parts of the U-shaped members extend out of the outer end parts of the anti-seismic beams 1 to serve as connecting joints, and the two connecting joints are connected through steel wire rope clamps 3. In order to solve the problem of corrosion of the steel bar under the action of the reservoir water level, the steel wire rope 2 preferably adopts a galvanized steel wire rope. In order to effectively ensure the structural strength and facilitate connection, the anchoring length of the steel wire rope 2 embedded into the anti-seismic beam 1 is not less than 30 cm. Two side edges of the U-shaped component are arranged along the horizontal direction; the U-shaped member is arranged at the center of the end face of the earthquake-proof beam 1. Specifically, the reinforcement cage generally includes stressed longitudinal bars 4 and stirrups 5, and since the steel wire ropes 2 are connected to the middle position of the height direction of the earthquake-proof beam 1, the position generally corresponds to the position of the stirrups 5, and therefore, the steel wire ropes 2 are generally fixed with the stirrups 5. For the convenience of hoisting, the anti-seismic beam 1 is also embedded with a hoisting ring 6.
Examples
When the method is implemented, the method can be realized by the following steps:
the first step is as follows: and pre-burying steel bars and steel wire ropes in the beam of the anti-seismic precast beam. The method comprises the steps of blanking and binding stressed longitudinal bars and stirrups in the anti-seismic beam, and binding a galvanized steel wire rope and a ring-shaped stirrup, wherein the anchoring length of the steel wire rope embedded into the anti-seismic beam is not less than 30cm, and a semicircular outcrop of the galvanized steel wire rope is reserved at the end of the anti-seismic beam.
The second step is that: and (5) erecting and maintaining the precast beam. And fixing the template by adopting a template steel bar with a proper size, pouring concrete, removing the template after the strength meets the requirement, and continuously watering, moisturizing and maintaining for more than 28 days in the later period.
The third step: and (5) connecting the anti-seismic beams. And (3) clamping the exposed steel wire ropes by using the steel wire rope with the phi 22 to connect the steel wire ropes in single-strand mode, so that the single anti-seismic beam forms an in-dam anti-seismic frame lattice beam.
The fourth step: and hoisting and laying the anti-seismic beam. And after the dam anti-seismic beam placing platform is filled, firstly detecting the elevation. And if the local flatness does not meet the paving requirement, fine materials are adopted for manual flattening so as to ensure the flatness of the foundation paved by the anti-seismic beam. The beam is lifted to a lorry by a 16t crane, conveyed to the dam face and directly unloaded to the working face, and then placed after the field is leveled by a backhoe. After the placement is finished, measurement and checking are carried out again, and manual local adjustment is carried out, so that the placement position of the anti-seismic beam meets the design requirement, and the anti-seismic beam is ensured not to have an overhead phenomenon.
The fifth step: and (5) covering the anti-seismic beam. The installed anti-seismic beam is covered with the filler, the filler is poured onto the discharging platform, the back shovel fills the interior of the sash, the beam is prevented from shifting during filling, and the anti-seismic beam is prevented from being broken by large stones. After the filling of the rockfill material layer is completed, rolling is started. And a static rolling mode is adopted during rolling, so that the earthquake-proof beam is prevented from being broken by earthquake. And finishing rolling and performing upper-layer filling after the experiment is qualified.
The beam-to-beam flexible connection structure embedded into the galvanized steel wire rope in the precast beam is convenient to construct, the galvanized steel wire rope with the designed length is directly intercepted without processing steps such as bending of reinforcing steel bars, and the two ends of the galvanized steel wire rope are embedded into the precast beam and exposed out of the semicircular bending parts, so that the cost is saved; the flexible connection structure adopts galvanized steel wire ropes, has strong ageing resistance, corrosion resistance and durability, and solves the problem of corrosion of the steel bars under the action of the water level of the warehouse; because the steel wire ropes are more flexible than the steel bars, the flexible connection structure enables the anti-seismic beam system to form a flexible reinforcement system, can better adapt to the deformation of the dam body, increases the allowable deformation amount of the structure, effectively avoids permanent longitudinal and transverse cracks or pull-off generated by the dam body and connection between rigid buildings, and can solve the problem that the reinforced concrete beam cannot adapt to uneven natural settlement after the dam is built and uneven permanent deformation caused by earthquake.
Claims (4)
1. Antidetonation roof beam flexible connection structure in high earth-rock dam includes two piece at least antidetonation roof beams (1), and antidetonation roof beam (1) is provided with steel reinforcement cage, its characterized in that for prefabricated reinforced concrete structure in antidetonation roof beam (1): the end face positions of the abutting ends of two adjacent anti-seismic beams (1) are respectively pre-embedded with a steel wire rope (2), the steel wire ropes (2) are U-shaped members, the two ends of each U-shaped member are fixedly connected with a steel reinforcement cage, the outer end parts of the bent parts of the U-shaped members, extending out of the anti-seismic beams (1), serve as connecting joints, and the two connecting joints are connected through steel wire rope clamps (3).
2. The flexible connection structure for earthquake-resistant beams in high earth-rock dam dams of claim 1, characterized in that: the anchoring length of the steel wire rope (2) embedded into the anti-seismic beam (1) is not less than 30 cm.
3. The flexible connection structure for earthquake-resistant beams in high earth-rock dam dams of claim 1, characterized in that: two side edges of the U-shaped component are arranged along the horizontal direction; the U-shaped component is arranged in the center of the end face of the anti-seismic beam (1).
4. The flexible connection structure for earthquake-resistant beams in high earth-rock dam dams of any one of claims 1 to 3, characterized in that: the steel wire rope (2) is a galvanized steel wire rope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011367788.1A CN112554139A (en) | 2020-11-27 | 2020-11-27 | Flexible connection structure for anti-seismic beams in dam of high earth-rock dam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011367788.1A CN112554139A (en) | 2020-11-27 | 2020-11-27 | Flexible connection structure for anti-seismic beams in dam of high earth-rock dam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112554139A true CN112554139A (en) | 2021-03-26 |
Family
ID=75046567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011367788.1A Pending CN112554139A (en) | 2020-11-27 | 2020-11-27 | Flexible connection structure for anti-seismic beams in dam of high earth-rock dam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112554139A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2178845C2 (en) * | 2000-02-14 | 2002-01-27 | Мансуров Олег Ибрагимович | Antiseismic protective platform |
| CN202610768U (en) * | 2012-05-23 | 2012-12-19 | 中国水电顾问集团成都勘测设计研究院 | Anti-seismic girder structure of dam body |
| CN103556749A (en) * | 2013-10-10 | 2014-02-05 | 南京工业大学 | Hanging flexible connection of precast concrete infill wall |
| CN104074274A (en) * | 2014-07-17 | 2014-10-01 | 长沙远大住宅工业集团有限公司 | Connection joint of prefabricated sandwich side fascia |
| CN105155476A (en) * | 2015-09-24 | 2015-12-16 | 中国电建集团成都勘测设计研究院有限公司 | Meizoseismal-area high earth-rock dam aseismic structure and construction method thereof |
| CN109838012A (en) * | 2019-03-29 | 2019-06-04 | 贵州兴贵恒远新型建材有限公司 | A kind of flexible connecting device and its construction method of the assembled building block wall with aluminium set |
-
2020
- 2020-11-27 CN CN202011367788.1A patent/CN112554139A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2178845C2 (en) * | 2000-02-14 | 2002-01-27 | Мансуров Олег Ибрагимович | Antiseismic protective platform |
| CN202610768U (en) * | 2012-05-23 | 2012-12-19 | 中国水电顾问集团成都勘测设计研究院 | Anti-seismic girder structure of dam body |
| CN103556749A (en) * | 2013-10-10 | 2014-02-05 | 南京工业大学 | Hanging flexible connection of precast concrete infill wall |
| CN104074274A (en) * | 2014-07-17 | 2014-10-01 | 长沙远大住宅工业集团有限公司 | Connection joint of prefabricated sandwich side fascia |
| CN105155476A (en) * | 2015-09-24 | 2015-12-16 | 中国电建集团成都勘测设计研究院有限公司 | Meizoseismal-area high earth-rock dam aseismic structure and construction method thereof |
| CN109838012A (en) * | 2019-03-29 | 2019-06-04 | 贵州兴贵恒远新型建材有限公司 | A kind of flexible connecting device and its construction method of the assembled building block wall with aluminium set |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108343257B (en) | Construction method for additionally installing elevator in existing multi-storey house | |
| CN102979221B (en) | Shear wall structure configured with crossed slant internal prestress and construction method of shear wall structure | |
| CN208668765U (en) | Precast prestressed beam and assembled composite frame structure | |
| CN110055979A (en) | For the precast prestressed concrete anchor pier of slope reinforcement and production and construction method | |
| CN111364364A (en) | Construction method for cast-in-place prestressed concrete continuous box girder | |
| CN113417300B (en) | Slope support system and construction method thereof | |
| CN112982432A (en) | Prestressed concrete foundation pit supporting structure and construction method | |
| CN111894045A (en) | Anti-floating anchoring structure and anti-floating anchoring construction method for basement bottom plate | |
| CN210342375U (en) | Concrete laminated slab | |
| CN209923945U (en) | Slope surface protection structure | |
| CN110578287A (en) | assembled earth covering corrugated steel plate-prestressed concrete combined arch bridge and construction method thereof | |
| CN112709143B (en) | Cast-in-place inclined leg rigid frame bridge disc buckle type full-space support and template construction method | |
| CN110206135B (en) | Stone masonry house foundation reinforcing structure and method | |
| CN217204165U (en) | Assembled anchor rod frame beam | |
| CN112554139A (en) | Flexible connection structure for anti-seismic beams in dam of high earth-rock dam | |
| CN110067251A (en) | For the prefabricated reinforced concrete anchor pier of slope reinforcement and production and construction method | |
| CN212582757U (en) | Anti-floating anchoring structure for basement bottom plate | |
| CN211621667U (en) | Tubular pile cushion cap girder steel rail mounted tower machine walking foundation structure | |
| CN211037909U (en) | Beamless floor reinforcing structure | |
| CN213115222U (en) | Positioning and protecting device for internal reinforcing steel bars of shear wall | |
| CN210066763U (en) | Foundation pit side wall structure reinforcing and supporting device | |
| CN209413171U (en) | A kind of prefabricated component stair of light silencing | |
| CN114086473A (en) | High pier cast-in-place beam support and construction method thereof | |
| CN108951618B (en) | Pile anchor supporting device | |
| CN113279423A (en) | Prefabricated column pier and post-cast strip foundation beam assembly integral construction method |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210326 |
|
| RJ01 | Rejection of invention patent application after publication |