CN103306251B - Vibration damping and energy dissipation limiting device for water diversion steel pipe bearing of hydropower station - Google Patents
Vibration damping and energy dissipation limiting device for water diversion steel pipe bearing of hydropower station Download PDFInfo
- Publication number
- CN103306251B CN103306251B CN201310255728.4A CN201310255728A CN103306251B CN 103306251 B CN103306251 B CN 103306251B CN 201310255728 A CN201310255728 A CN 201310255728A CN 103306251 B CN103306251 B CN 103306251B
- Authority
- CN
- China
- Prior art keywords
- steel pipe
- vibration damping
- buttress
- limiting
- diversion steel
- 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.)
- Active
Links
Classifications
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Revetment (AREA)
Abstract
The invention discloses a vibration damping and energy dissipation limiting device for a water diversion steel pipe bearing of a hydropower station. The device aims at solving the problems that the transverse deflection of a steel pipe of the existing built power station is excessive, and buttress concrete is cracked up by a limiting baffle easily. The vibration damping and energy dissipation limiting device comprises an anti-collision plate arranged on the inner side face of a buttress, wherein a limiting landing leg is arranged between the anti-collision plate and a supporting ring of a water diversion steel pipe; one end of the limiting landing leg is fixed on the supporting ring; the other end of the limiting landing leg is a free end; and a vibration damping pad is mounted at the free end. With the adoption of the device, transverse loads of the bearing and the steel pipe due to an earthquake effect and a water shock wave in the steel pipe are reduced greatly; earthquake damages are reduced; the harmful excessive deflection generated by the steel pipe is limited effectively; and the adverse effects due to the fact that a transverse limiting design gap of the steel pipe is difficult to guarantee caused by a steel pipe mounting error during a construction process are eliminated.
Description
Technical field
The present invention relates to a kind of power station diversion steel pipe bearing vibration damping displacement-limited with dissipation device, mainly be applicable to water channeling type power station major diameter exposed penstock slide, roll and gantry pillars, be particularly useful for the large PD duty pressure diversion steel pipe in the complicated geological such as high seismic intensity area, deep covering layer orographic condition area.
Background technology
Under prior art condition, small diameter pressure diversion steel pipe generally adopts saddle type sliding support, Supporting ring is provided with between diversion steel pipe and buttress, Supporting ring is fixed on the upper surface of buttress by sliding support, because saddle type sliding support is better to diversion steel pipe parcel property, under normal circumstances all without the need to adopting horizontal limit devices, and for the diversion steel pipe of medium format diameter and head, generally inside buttress, install interim horizontal limit devices additional, this stopping means is in low earthquake intensity district, use all right when penstock installation construction quality is good, but for high seismic intensity area, earthquake-prone region, the major diameter D in deep covering layer and Valley condition area, high water head P or large PD duty pressure diversion steel pipe, when power station unit increasing and decreasing load runs, steel pipe bearing there will be and laterally repeatedly swings back and forth collision and damage bearing, when even there is lateral seismic effect, diversion steel pipe transverse shifting makes steel pipe bearing depart from buttress, after causing pipeline burst, current destroy by rush of water the severe compromise of Power Plant.
In global range, the generation of earthquake disaster is more and more frequent, and along with hydroelectric development degree improves, in high seismic intensity area, the power station built, earthquake-prone region gets more and more.In hydroelectric project, in order to ensure the operational reliability of diversion steel pipe bearing, ensure for large PD duty pressure diversion steel pipe, to be necessary the seismic seeurity of bearing to arrange Horizontal Seismic, stopping means.
Summary of the invention
The deficiency excessive for existing Built hydropower station steel pipe transverse displacement, postive stop baffle easily breaks buttress concrete, the present invention aims to provide a kind of power station diversion steel pipe bearing vibration damping displacement-limited with dissipation device, this vibration damping displacement-limited with dissipation device can avoid buttress concrete to be damaged effectively, thus ensures the security of operation of whole hydroelectric project.
To achieve these goals, the technical solution adopted in the present invention is: a kind of power station diversion steel pipe bearing vibration damping displacement-limited with dissipation device, comprises the Crashworthy plate be arranged on buttress medial surface; Be provided with spacing supporting leg between described Crashworthy plate and the Supporting ring of diversion steel pipe, one end of this spacing supporting leg is fixed on described Supporting ring, and the other end is free end, and this free end is equipped with beam.
Be below the technical scheme of further improvement of the present invention:
Further, described buttress medial surface is vertical surface or inclined-plane, and described Crashworthy plate is fixed on the pre-embedded steel slab on buttress medial surface preferably by dowel.
As a kind of concrete form of structure, the free end of described spacing supporting leg is equipped with at least two pieces of postive stop baffles, the yielding rubber plate as beam is housed between at least two pieces of postive stop baffles.
Be the situation on inclined-plane for buttress medial surface, positive stop is equipped with in the termination of described Crashworthy plate, clashes into buttress when can prevent spacing supporting leg from producing lateral displacement.
Above structure; the present invention meets the requirement of buttress concrete partial pressing at the pre-buried spacing pressure-bearing steel plate of buttress medial surface (vertical surface or inclined-plane); postive stop baffle impact damage is exempted to protect buttress concrete; steel pipe Supporting ring arranges the postive stop baffle of band yielding rubber cushion block; rubber cushion blocks be 2 assembled, by the spacing gap value of rubber cushion blocks adjustment steel pipe transverse of dormant bolt and different-thickness.
Compared with prior art, the invention has the beneficial effects as follows: the present invention not only significantly reduces the transverse load of steel pipe in geological process and steel pipe caused by surge wave and bearing, alleviate earthquake, effective restriction steel pipe produces harmful excessive displacement, but also eliminates in work progress because steel pipe alignment error is difficult to the adverse effect that ensures that the spacing design gaps amount of steel pipe transverse is brought.
Below in conjunction with drawings and Examples, the present invention is further elaborated.
Accompanying drawing explanation
Fig. 1 is the structure principle chart (vertical surface buttress structural shape) of one embodiment of the invention;
Fig. 2 is I-I sectional view of Fig. 1;
Fig. 3 is the structure principle chart (inclined-plane buttress structural shape) of another embodiment of the present invention;
Fig. 4 is o-o sectional view of Fig. 3.
In the drawings
1-diversion steel pipe; 2-Supporting ring; 3-steel pipe bearing; 4-buttress; 5-Crashworthy plate;
6-dowel; The spacing supporting leg of 7-; 8-postive stop baffle; 9-positive stop; 10-beam;
11-countersunk head connecting bolt.
Detailed description of the invention
embodiment 1, Ethiopia's project diversion steel pipe lateral deflection are repaired
1.1 project profile
This project is positioned on the Neshe river in the basin, the blue or green Nile of Ethiopian capital Addis Ababa (Addis Ababa) northwest 250km, north latitude 9 ° of 43 ˊ ~ 9 ° 46 ˊ, east longitude 37 ° of 5 ˊ ~ 37 ° 16 ˊ.This power station is peak load stations, and every day runs 6.5h, and install 2 bucket formula turbine-generator units altogether, gross head 614.5m, single-machine capacity 48.5MW, total installation of generating capacity 97MW, unit is specified quotes flow 9.25m
3/ s, design year generated energy 2.155 hundred million kWh.
This engineering key construction is primarily of dam, flood spillway, diversion system, ground power house and go out the compositions such as the field of line.Dam adopts homogeneous earth dam, and crest elevation 2235.0m, maximum height of dam 38m, normal pool level 2230.0m, level of dead water 2214.0m, aggregate storage capacity is 4.48 hundred million m
3, minimum capacity of a reservoir is 8,500 ten thousand m
3, effective storage 3.63 hundred million m
3; Flood spillway, water inlet etc. form the tower structure of dam upstream jointly, and diversion system inducer and flood discharge section are arranged in juxtaposition up and down, pass through dam, and the layout of diversion system adopts the layout pattern of hole two machine, and factory building is ground type.
The Construction Party of this project is Utilities Electric Co. of Ethiopia (EEPCO), owner engineer is Mei Huahazha international corporation of the U.S. (MWH), Ge Zhou Ba group company of China is engineering EPC general contractor, Zhongnan Prospecting Design Inst. China Hydrauelectric Consultant Group is design subcontractor, Project contract total lever factor 38 months.This project is formally signing and put into operation immediately in December, 2006, and on July 22nd, 2010 is lower lock retaining formally, and on December 17th, 2011,2 units were all constructed and put into operation generating.
the 1.2 diversion steel pipe lateral deflection analyses of causes
In September, 2011, power station is after water-filling first, find that portions produces larger lateral deflection, maximum transversal addendum modification reaches 65mm, and this displacement has the trend along with the time increases gradually, excessive lateral deflection causes bearing postive stop baffle torsional deformation serious, and buttress and postive stop baffle junction concrete cracking destroy, 7#, 9#, 10# and 11# bellows expansion joint extruding torsional deformation is serious, and pull bar ruptures.
The analysis of causes of diversion steel pipe excessive lateral deflection is thought: cause power station first the excessive main cause causing bellows expansion joint crimp to destroy of water-filling diversion steel pipe lateral deflection be that the installation steel pipe misalignment of axe that causes lack of standardization of diversion steel pipe and expansion coupling causes more greatly, and the design function that diversion steel pipe bearing horizontal limit devices fails to play expection is also the major reason causing this quality accident.
1.3 displacement repair
Postive stop baffle is provided with in buttress side when repairing first; after running a period of time, postive stop baffle shock buttress makes the local damage of part buttress concrete; during secondary repair process; carry out backfill concrete to a pier foundation to reinforce; adopt expansion bolt to add bumper pad at concrete buttress medial surface, cushion and protect buttress concrete.Due in the air that rubber cushion blocks exposes, under the wild environment of exposing to the sun and rain for a long time, rubber easily produces aging, and bearing positive stop and rubber extrude for a long time and also easily causes rubber cushion blocks to damage and unsightly, its repairing effect need the inspection of time.
embodiment 2, certain dam of Iran and power station project
Certain dam of Iran and power station project are positioned at Iranian western Lorestan and economize on the Rudbar river in Zagros mountain area, apart from Teheran, capital (Tehran) about 454km.Power station is water channeling type power station under the complex geological condition of high earthquake zone, and engineering is made up of key constructions such as dam, flood spillway, dam body discharge orifice, water-carriage system, ground power house and switching stations.Power station installs 2, single-machine capacity 225MW, rated head 430.74m, metered flow 115.6m
3/ s.Diversion Tunnel footpath 6.0m, is about 1.34km, two-wire 1., 2. exposed conduit steel pipe be about 2.34km and 2.32km, caliber from 4.4m to 4.0m, 3.8m, 3.4m.Steel pipe passes through the different terrain regions such as abrupt slope, gentle slope, tunnel and coombe, and buttress complex geologic conditions is changeable, includes basement rock, deep covering layer, active fault and karst etc.
Use for reference the experience and lessons that Ethiopia's project diversion steel pipe lateral deflection is excessive, this power station is except considering lateral limiting device when diversion steel pipe sliding support designs, horizontal limit devices is set up to diversion steel pipe bearing, ensure that power station security of operation to greatest extent.
The content that above-described embodiment is illustrated should be understood to these embodiments only for being illustrated more clearly in the present invention, and be not used in and limit the scope of the invention, after having read the present invention, the amendment of those skilled in the art to the various equivalent form of value of the present invention has all fallen within the application's claims limited range.
Claims (4)
1. a power station diversion steel pipe bearing vibration damping displacement-limited with dissipation device, is characterized in that, comprises the Crashworthy plate (5) be arranged on buttress (4) medial surface; Be provided with spacing supporting leg (7) between the Supporting ring (2) of described Crashworthy plate (5) and diversion steel pipe (1), one end of this spacing supporting leg (7) is fixed on described Supporting ring (2), and the other end is free end, and this free end is equipped with beam (10).
2. power station according to claim 1 diversion steel pipe bearing vibration damping displacement-limited with dissipation device, it is characterized in that, described buttress (4) medial surface is vertical surface or inclined-plane, and described Crashworthy plate (5) is the pre-embedded steel slab be fixed on by dowel (6) on buttress (4) medial surface.
3. power station according to claim 1 diversion steel pipe bearing vibration damping displacement-limited with dissipation device, it is characterized in that, the free end of described spacing supporting leg (7) is equipped with at least two pieces of postive stop baffles (8), the yielding rubber plate as beam (10) is housed between at least two pieces of postive stop baffles (8).
4., according to the power station diversion steel pipe bearing vibration damping displacement-limited with dissipation device one of claim 1 ~ 3 Suo Shu, it is characterized in that, positive stop (9) is equipped with in the termination of described Crashworthy plate (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310255728.4A CN103306251B (en) | 2013-06-26 | 2013-06-26 | Vibration damping and energy dissipation limiting device for water diversion steel pipe bearing of hydropower station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310255728.4A CN103306251B (en) | 2013-06-26 | 2013-06-26 | Vibration damping and energy dissipation limiting device for water diversion steel pipe bearing of hydropower station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103306251A CN103306251A (en) | 2013-09-18 |
| CN103306251B true CN103306251B (en) | 2015-07-15 |
Family
ID=49131938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310255728.4A Active CN103306251B (en) | 2013-06-26 | 2013-06-26 | Vibration damping and energy dissipation limiting device for water diversion steel pipe bearing of hydropower station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103306251B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203320498U (en) * | 2013-06-26 | 2013-12-04 | 中国水电顾问集团中南勘测设计研究院 | Vibration reduction and energy dissipation limiting device for water diversion steel pipe support in hydropower station |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0762510B2 (en) * | 1993-03-09 | 1995-07-05 | 宏 五十嵐 | Steel pipe screw joint |
| JPH08100600A (en) * | 1994-09-30 | 1996-04-16 | Mitsubishi Heavy Ind Ltd | Method of carrying-in large-diameter steel pipe from shaft section to inclined shaft section |
| CN201305821Y (en) * | 2008-10-16 | 2009-09-09 | 靳顷 | Omnidirectional vibration isolating bearing |
-
2013
- 2013-06-26 CN CN201310255728.4A patent/CN103306251B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203320498U (en) * | 2013-06-26 | 2013-12-04 | 中国水电顾问集团中南勘测设计研究院 | Vibration reduction and energy dissipation limiting device for water diversion steel pipe support in hydropower station |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103306251A (en) | 2013-09-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Volkwein et al. | Design of flexible debris flow barriers | |
| CN203320498U (en) | Vibration reduction and energy dissipation limiting device for water diversion steel pipe support in hydropower station | |
| Wieland | Features of seismic hazard in large dam projects and strong motion monitoring of large dams | |
| CN103306251B (en) | Vibration damping and energy dissipation limiting device for water diversion steel pipe bearing of hydropower station | |
| KR20190124443A (en) | The foundation for installation of a solar panel using Scour Protection Form and construction method thereof | |
| Cochran | Seismic base isolation of a high voltage transformer | |
| CN104047273B (en) | Power station dissipation and scouring wall and construction method thereof | |
| de Sonneville et al. | Design and optimization of scour protection for offshore wind platform Dolwin Beta | |
| CN210899012U (en) | Be applied to photovoltaic power generation structure of breakwater | |
| CN210529614U (en) | Semicircular dam structure for installing lamp pile foundation | |
| Bochnak et al. | Design of RCC gravity dam and FEM modelling in GeoStudio-Longtan dam | |
| Jovani et al. | PV plant-New potentials in Vau i Dejes HPP, Albania | |
| CN103938596A (en) | Water conveyance tunnel line system crossing active fault | |
| CN105544474A (en) | Floating net vortex eliminating method applied in front of water inlet | |
| Wieland | Damage of Sefid Rud Buttress Dam Project in Iran Caused by the Magnitude 7.4 Manjil Earthquake of June 21, 1990 | |
| CN210975738U (en) | Protective dam body | |
| CN211713904U (en) | Underground factory building exploration open cut tunnel arrangement structure | |
| JP2014051970A5 (en) | ||
| CN216401713U (en) | Device is built in equipment of surface of water floating type power station body bracket component | |
| CN203846466U (en) | Water conveying tunnel tube system crossing movable fault | |
| CN112049156B (en) | Vibration-reducing, isolating, limiting and seepage-preventing connection system for pipe gallery foundation | |
| CN220057614U (en) | High-bearing-capacity bridge bearing platform structure | |
| KR101253039B1 (en) | Inflow steel form of tidal power plant and method for constructing inflow using thereof | |
| Wieland | Seismic design and safety aspects of bottom outlets, spillways and intake structures of large storage dams | |
| Eichenberger | The first commercial piano key weir in Switzerland |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent for invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 410014 Hunan province Changsha Yuhua District, camphor Road No. 16 Applicant after: Company limited of Central-South survey and design research institute of electricity Jian group of China Address before: 410014, 9 camphor Road, Yuhua District, Hunan, Changsha Applicant before: Zhongnan Prospecting Design Inst. China Hydrauelectric Consultant Group |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: ZHONGNAN PROSPECTING DESIGN INST. CHINA HYDRAUELECTRIC CONSULTANT GROUP TO: CHINA POWER GROUP ZHONGNAN INVESTIGATION DESIGN + RESEARCH INSTITUTE CO., LTD. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |