CN105625271A - Method for repairing water stop of vertical joint of rock-fill dam concrete face slab - Google Patents
Method for repairing water stop of vertical joint of rock-fill dam concrete face slab Download PDFInfo
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- CN105625271A CN105625271A CN201511013376.7A CN201511013376A CN105625271A CN 105625271 A CN105625271 A CN 105625271A CN 201511013376 A CN201511013376 A CN 201511013376A CN 105625271 A CN105625271 A CN 105625271A
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- concrete
- polyureas
- brushing
- water stop
- hand
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- 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
Abstract
The invention belongs to the technical field of electric power, particularly relates to a method for repairing a water stop of a vertical joint of a rock-fill dam concrete face slab and specifically relates to a water stop structure and method for the surface of a vertical joint of a ground plate rock-fill dam water stop face slab of a high and cold hydropower station. Plastic packing adhesive glue is brushed in a concrete reserved groove; when a user touches the adhesive glue with fingers and judges that the adhesive glue is not sticky, a GB rubber water stop bar is installed; embedding and filling of GB plastic packing are conducted; an epoxy primer BE bonding agent is brushed on the surfaces of concrete at the positions, on the two sides of the GB plastic packing, of the reserved groove; and after the surface of the bonding agent is dried, polyurea is directly scraped with hands, and then base cloth is stuck. The method is simple in construction technology and high in efficiency, and the quality is easy to ensure; the appearance of the vertical joint is smooth, smoothness is high, a seepage-proof effect is good, and the plastic packing is reliably protected; durability is good, and bonding drawing force tests on the field show that the bonding strength between the water stop and concrete is high; and the freezing strength of ice is greatly reduced, damage caused by freezing to the water stop structure is effectively avoided, and the method is suitable for vigorous application and popularization of the power industry.
Description
Technical field
The invention belongs to technical field of electric power, particularly relate to a kind of method for repairing Face Slab of Concrete of Rock-fill Dam vertical lap seam sealing. Specifically for high and cold power station ground rock fill dam with face slab sealing panel vertical lap seam surface water stop structure and method.
Prior art
Winter of cold district is cold and very long, face dam winter operation more severe, panel vertical lap seam surface water stop structure is under ice thrust and ice pull out power repeated action, especially near change of level district, seriously impaired, expansion bolt is easily pulled out, press strip steel plate is come off, protection rubber cover plate is torn, and plasticity jointing material loses protection, destroys gradually under freezing effect.
Rock fill dam with face slab surface watertight seal technology is certain water conservation survey design research institute domestic design, lotus flower power station, Heilongjiang Province rock fill dam with face slab is applied, obtain good protection effect, although two power stations are all in cold district, but the exceptional operating conditions due to Pu Shihe power station, the maximum 20.99m of upper storage reservoir range of water level every day, run frequent, under the drawing force and frictional force effect of ice, cover plate destroys serious, affects the steady running in power station.
As shown in Figure 1, namely the GB plastic filler 3, GB in figure fixes the label of the material of producer to the vertical lap seam water sealing structure traditional method on traditional panel dam, as long as the filler without hesitation of the index that meets design requirement can use. Once it is called flexible filler in the past, it was the plastics seal material taking macromolecular materials such as isoprene-isobutylene rubbers as main material production, and under effect of water pressure, can squeeze in seam by filleting position, play joint filling sealing effect. Cover sheet is covered in plastic filler surface, plays sealing and protection plastic filler, and evenly transmits water pressure, and auxiliary plastic filler plays the flaky material of sealing effect, generally adopts the material that the ageing-resistant performances such as terpolymer EP rubber are good to make.
In Fig. 1 levelling at vertical lap seam place, rock fill dam dam joints cement bedding mortar 10, PVC pad 11 is installed, at pad W type copper seal 12, after installation acceptance(check), casting concrete panel 8, reserved expansion bolt 6 nut built-in fitting, the first polyurethane foam in panel seam place fills 9, at installation chloroprene rubber rod 1, joint surface brushing asphalt emulsion 7, at seam place, chloroprene rubber rod 1 is installed again, fill GB plasticity and fill out 3, glue 4 closed by brush, rubber plate 2 is installed, steel plate galvanized is adopted in rubber plate 2 both sides--galvanized flat steel 5 is closed, expansion bolt 6 is adopted to be linked with concrete by galvanized flat steel 5.
Above-mentioned this kind of prior art, especially in autumn and winter, Winter-Spring alternate freezing and thawing season, temperature difference per day causes more greatly panel seam displacement amount bigger, and water sealing structure damage situations is particularly outstanding.
Summary of the invention
For above-mentioned the deficiencies in the prior art part, the present invention provides a kind of method for repairing Face Slab of Concrete of Rock-fill Dam vertical lap seam sealing, it is intended that in order to realize excellent in durability, good seepage-proof property, to the reliable goal of the invention of protection of plastic filler.
To achieve the above object of the invention, the present invention is achieved by the following technical solutions:
For repairing a method for Face Slab of Concrete of Rock-fill Dam vertical lap seam sealing, comprise the following steps:
(1) polishing along the reserved rooved face of concrete vertical lap seam and the reserved groove of concrete with angle grinding machine, polishing width is to the reserved groove dual-side edge of concrete, and cleans with clear water, except dust, makes surface clean, without dirt;
(2) after naturally drying, brushing plastic filler assembly glue in reserved slot, to groove both sides extension 0.5-5cm, places 2-3 hour, installs GB rubber sealing rod when glue to be bonded refers to touch sticky, then embedding fills out GB plastic filler, tamp closely knit, smooth;
(3) GB plastic filler is embedding fill out end after, the reserved groove concrete surface brushing epoxy primer BE interfacial agents along GB plastic filler both sides, brushing evenly, without holiday;
(4) leaving standstill 4-5 hour, after interfacial agents table is dry, directly scrapes painting hand and scrape polyureas, it allows activity duration within 2 hours, is coated with four to five times; After hand scrapes polyureas brushing first time, paste tire base cloth at once, tire base cloth wide for 20-30cm and hand are scraped polyureas and combines together; The thickness that hand scrapes polyureas is controlled all over number by area and brushing, ensures that vertical lap seam position is less than within the scope of 25cm, and polyureas thickness is greater than 5mm, and the thickness that position, edge hand scrapes polyureas is greater than 3mm; Evenly, brushing once shaped, is not coated with back and forth, prevents parcel in brushing;
(5) scrape in polyureas construction process at brushing hand, if running into strong wind or raining, it is necessary to stop construction, carry out hiding protection to polyurea coating with protective material; After rain stops, wipe clean the dirt settling that SK hand is scraped on polyurea coating, it is possible to continue construction; After polyureas has been constructed, there is not water soaking in 12 hours, normal temperature maintenance.
Described plastic filler is GB plastic filler.
Described to groove both sides extension 0.5-5cm, comprising: 0.5cm, 0.6cm, 0.7cm, 0.8cm, 0.9cm, 1.1cm, 1.2cm, 1.4cm, 1.5cm, 1.6cm, 1.8cm, 2cm, 2.1cm, 2.2cm, 2.3cm, 2.4cm, 2.5cm, 2.6cm, 2.7cm, 2.8cm, 2.9cm, 3.0cm, 3.1cm, 3.2cm, 3.5cm, 3.7cm, 3.8cm, 4.0cm, 4.2cm, 4.5cm, 4.8cm, 5.0cm.
It is described to groove both sides extension 2cm,
Advantage and the useful effect of the present invention are as follows:
(1) construction technology is simple, and efficiency height, quality easily ensures.
(2) vertical lap seam flat appearance, highly polished, good seepage-proof property, the protection of plastic filler is reliable.
(3) good endurance, the bonding drawing force test through scene shows, itself and concrete cohesive strength height.
(4) cancel fastening piece, greatly reduce the freezing strength of ice, can effectively prevent the freezing destruction caused by water sealing structure.
Hand is scraped polyureas surface watertight seal and panel surface-normal seam is opened good protective effect, it is possible to effectively prevents ice sheet from being damaged by panel sealing, causes dam seepage to increase, causes the phenomenon of dam unstability to occur.
Pu Shihe pumped storage station upper storage reservoir rock fill dam with face slab scrapes polyureas cover sheet at the hand of a panel tensile vertical lap seam test application, experiences long-time test, and macroscopic test does not find any change, is suitable for power industry and widelys popularize and apply.
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Accompanying drawing explanation
Fig. 1 is concrete slab vertical lap seam water sealing structure figure;
Fig. 2 is that panel vertical lap seam sealing hand scrapes polyureas cover sheet schematic diagram.
In figure: chloroprene rubber rod 1, rubber plate 2, GB plastic filler 3, close glue 4, galvanized flat steel 5, expansion bolt 6, asphalt emulsion 7, concrete slab 8, polyurethane foam fills 9, sand-cement slurry bed course 10, PVC pad 11, W type copper seal 12, hand scrapes polyureas 13, tire base cloth 14, interfacial agents 15, reserved groove 16, plastic filler 17, assembly glue 18.
Embodiment
As shown in Figure 2, the present invention is a kind of method for repairing Face Slab of Concrete of Rock-fill Dam vertical lap seam sealing, comprises the following steps:
(1) polishing along the reserved rooved face of concrete vertical lap seam and the reserved groove 16 of concrete with angle grinding machine, polishing width is to the reserved groove dual-side edge of concrete, and cleans with clear water, except dust, makes surface clean, without dirt.
(2) after naturally drying, GB plastic filler assembly glue 18 is brushed in reserved slot, to groove both sides extension 0.5cm-5cm, usually can selective epitaxy 2cm best, place 2-3 hour, GB rubber sealing rod is installed when glue to be bonded refers to touch sticky, then embedding fills out GB plastic filler 17, tamp closely knit, smooth.
(3) GB plastic filler 3 is embedding fill out end after, the reserved groove concrete surface brushing epoxy primer BE14 interfacial agents 15 along GB plastic filler 3 both sides, brushing evenly, without holiday.
(4) leaving standstill 4-5 hour, after interfacial agents table is dry, directly scrapes painting hand and scrape polyureas 13, it allows activity duration within 2 hours, is coated with four-five times. Hand is scraped after polyureas 13 brushes first time, pastes tire base cloth 14 at once, with hand, tire base cloth 14 wide for 20-30cm is scraped polyureas 13 and combines together. The thickness that hand scrapes polyureas 13 can be controlled all over number by area and brushing, ensures that vertical lap seam position is less than within the scope of 25cm, and polyureas thickness is greater than 5mm, and the thickness that position, edge hand scrapes polyureas 13 is greater than 3mm. Evenly, brushing once shaped, is not coated with back and forth, prevents parcel in brushing.
(5) scrape in polyureas 13 construction process at brushing hand, if running into strong wind or raining, it is necessary to stop construction, carry out hiding protection to polyurea coating with protective materials such as canvas. After rain stops, wipe clean the dirt settling that SK hand is scraped on polyurea coating, it is possible to continue construction. After polyureas has been constructed, in 12 hours, control does not have water soaking, normal temperature maintenance as far as possible.
Panel vertical lap seam hand after completing scrapes polyureas cover sheet as shown in Figure 2.
The present invention is described to groove both sides extension 0.5-5cm when implementing, comprising: 0.5cm, 0.6cm, 0.7cm, 0.8cm, 0.9cm, 1.1cm, 1.2cm, 1.4cm, 1.5cm, 1.6cm, 1.8cm, 2cm, 2.1cm, 2.2cm, 2.3cm, 2.4cm, 2.5cm, 2.6cm, 2.7cm, 2.8cm, 2.9cm, 3.0cm, 3.1cm, 3.2cm, 3.5cm, 3.7cm, 3.8cm, 4.0cm, 4.2cm, 4.5cm, 4.8cm, 5.0cm ... all within protection domain of the present invention.
Claims (3)
1., for repairing a method for Face Slab of Concrete of Rock-fill Dam vertical lap seam sealing, it is characterized in that: comprise the following steps:
(1) polishing along the reserved rooved face of concrete vertical lap seam and the reserved groove of concrete with angle grinding machine, polishing width is to the reserved groove dual-side edge of concrete, and cleans with clear water, except dust, makes surface clean, without dirt;
(2) after naturally drying, brushing plastic filler assembly glue in reserved slot, to groove both sides extension 0.5-5cm, places 2-3 hour, installs GB rubber sealing rod when glue to be bonded refers to touch sticky, then embedding fills out GB plastic filler, tamp closely knit, smooth;
(3) GB plastic filler is embedding fill out end after, the reserved groove concrete surface brushing epoxy primer BE interfacial agents along GB plastic filler both sides, brushing evenly, without holiday;
(4) leaving standstill 4-5 hour, after interfacial agents table is dry, directly scrapes painting hand and scrape polyureas, it allows activity duration within 2 hours, is coated with four to five times; After hand scrapes polyureas brushing first time, paste tire base cloth at once, tire base cloth wide for 20-30cm and hand are scraped polyureas and combines together; The thickness that hand scrapes polyureas is controlled all over number by area and brushing, ensures that vertical lap seam position is less than within the scope of 25cm, and polyureas thickness is greater than 5mm, and the thickness that position, edge hand scrapes polyureas is greater than 3mm; Evenly, brushing once shaped, is not coated with back and forth, prevents parcel in brushing;
(5) scrape in polyureas construction process at brushing hand, if running into strong wind or raining, it is necessary to stop construction, carry out hiding protection to polyurea coating with protective material; After rain stops, wipe clean the dirt settling that SK hand is scraped on polyurea coating, it is possible to continue construction; After polyureas has been constructed, there is not water soaking in 12 hours, normal temperature maintenance.
2. a kind of method for repairing Face Slab of Concrete of Rock-fill Dam vertical lap seam sealing according to claim 1, is characterized in that: described plastic filler is GB plastic filler.
3. a kind of method for repairing Face Slab of Concrete of Rock-fill Dam vertical lap seam sealing according to claim 1, it is characterized in that: described to groove both sides extension 0.5-5cm, comprising: 0.5cm, 0.6cm, 0.7cm, 0.8cm, 0.9cm, 1.1cm, 1.2cm, 1.4cm, 1.5cm, 1.6cm, 1.8cm, 2cm, 2.1cm, 2.2cm, 2.3cm, 2.4cm, 2.5cm, 2.6cm, 2.7cm, 2.8cm, 2.9cm, 3.0cm, 3.1cm, 3.2cm, 3.5cm, 3.7cm, 3.8cm, 4.0cm, 4.2cm, 4.5cm, 4.8cm, 5.0cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511013376.7A CN105625271A (en) | 2015-12-31 | 2015-12-31 | Method for repairing water stop of vertical joint of rock-fill dam concrete face slab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511013376.7A CN105625271A (en) | 2015-12-31 | 2015-12-31 | Method for repairing water stop of vertical joint of rock-fill dam concrete face slab |
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| CN105625271A true CN105625271A (en) | 2016-06-01 |
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| CN201511013376.7A Pending CN105625271A (en) | 2015-12-31 | 2015-12-31 | Method for repairing water stop of vertical joint of rock-fill dam concrete face slab |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106836133A (en) * | 2017-03-31 | 2017-06-13 | 长江勘测规划设计研究有限责任公司 | Structure and construction method are repaired in a kind of concrete slab extruding destruction |
| CN108221866A (en) * | 2018-01-23 | 2018-06-29 | 中国水利水电科学研究院 | Severe cold area slab joint surface layer, which is put down, covers type flexibility water sealing structure and installation method |
| CN110409381A (en) * | 2019-07-04 | 2019-11-05 | 中国葛洲坝集团第一工程有限公司 | One kind being applied to rock seam crossing antiseepage cover plate compromise joint structure and construction method |
| CN110528465A (en) * | 2019-09-20 | 2019-12-03 | 中国水利水电科学研究院 | A kind of novel water-stop covering plate structure and its construction method |
| CN113737726A (en) * | 2021-08-31 | 2021-12-03 | 惠州北化工产学研基地有限公司 | Concrete face dam expansion joint structure |
| CN114382055A (en) * | 2022-02-24 | 2022-04-22 | 国网新源控股有限公司 | Asphalt concrete sliding joint structure and construction process |
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| CN204435318U (en) * | 2014-11-13 | 2015-07-01 | 北京中水科海利工程技术有限公司 | Be applied to the slab joint top layer application type water-stopping structure of Concrete Face Rockfill Dam |
| CN105155471A (en) * | 2015-09-02 | 2015-12-16 | 国家电网公司 | Water stopping method applied to joint of hydropower station and water stopping structure thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106836133A (en) * | 2017-03-31 | 2017-06-13 | 长江勘测规划设计研究有限责任公司 | Structure and construction method are repaired in a kind of concrete slab extruding destruction |
| CN108221866A (en) * | 2018-01-23 | 2018-06-29 | 中国水利水电科学研究院 | Severe cold area slab joint surface layer, which is put down, covers type flexibility water sealing structure and installation method |
| CN108221866B (en) * | 2018-01-23 | 2023-11-17 | 中国水利水电科学研究院 | Panel joint surface layer flat-covering type flexible water stop structure in severe cold region and mounting method |
| CN110409381A (en) * | 2019-07-04 | 2019-11-05 | 中国葛洲坝集团第一工程有限公司 | One kind being applied to rock seam crossing antiseepage cover plate compromise joint structure and construction method |
| CN110528465A (en) * | 2019-09-20 | 2019-12-03 | 中国水利水电科学研究院 | A kind of novel water-stop covering plate structure and its construction method |
| CN113737726A (en) * | 2021-08-31 | 2021-12-03 | 惠州北化工产学研基地有限公司 | Concrete face dam expansion joint structure |
| CN114382055A (en) * | 2022-02-24 | 2022-04-22 | 国网新源控股有限公司 | Asphalt concrete sliding joint structure and construction process |
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Application publication date: 20160601 |
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