CN104805805A - Method for enhancing thermal insulation, moisture retention and anti-cracking performances of dam - Google Patents
Method for enhancing thermal insulation, moisture retention and anti-cracking performances of dam Download PDFInfo
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- CN104805805A CN104805805A CN201510092325.1A CN201510092325A CN104805805A CN 104805805 A CN104805805 A CN 104805805A CN 201510092325 A CN201510092325 A CN 201510092325A CN 104805805 A CN104805805 A CN 104805805A
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- dam
- moisture
- heat
- insulation layer
- confining bed
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- 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
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
- E02B3/128—Coherent linings made on the spot, e.g. cast in situ, extruded on the spot
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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
- E02B7/08—Wall dams
- E02B7/10—Gravity dams, i.e. those in which the weight of the structure prevents overturning
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- 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)
- Building Environments (AREA)
Abstract
The invention relates to a method for enhancing thermal insulation, moisture retention and anti-cracking performances of a dam. The method includes the steps: firstly, cleaning the damaged surface of an original thermal insulation layer of a concrete dam surface of the dam; secondly, covering the surface of the original thermal insulation layer by a new moisture retention and thermal insulation closed layer; thirdly, covering the surface of the moisture retention and thermal insulation closed layer by a protection layer. By the aid of the method, various notches and cracks can be sealed and plugged when a concrete thermal insulation system of an original dam is not damaged, adhesion performances are improved, thermal insulation of the dam is improved, and the moisture retention and anti-cracking performances are improved.
Description
Technical field
The invention belongs to hydraulic engineering technical field, be specifically related to strengthen the method that dam heat and moisture preserving improves cracking resistance.
Background technology
In order to reduce the low temperature of cold wave and cold district and the temperature difference greatly on the impact of dam concrete, hydraulic engineering field worker have employed multiple heat and moisture preserving preventive means and protects dam, two kinds of conventional at present means of defences are: one is by bonding and mode that is anchoring, one block of block benzene plate is assembled in dam surface to be incubated, and part engineering is also coated with layer protective layer in order to attractive in appearance with durability outside polystyrene board heat-insulatation layer; Another kind method adopts spraying coating process that hard polyurethane foam integral seamless covered dam concrete surface, is coated with layer protective layer outside heat and moisture preserving froth bed simultaneously.
But, find through long-term engineering operation, some particularly early stage object of construction production, some seamed connecting materials such as benzene plate are adopted to carry out the concrete dam be incubated, under strong wind, cold wave low temperature, infiltration, the External Force Acting such as ice is swollen, there is damage to a certain degree in its heat and moisture preserving layer and overcoat, some damages are more serious.
For these damaged parts, re-starting heat and moisture preserving and construction of prevention work as all removed, greatly can increase engineering cost owing to removing and rebuilding dam heat and moisture preserving Anti-crack system on the one hand, both uneconomical, also not environmentally; On the other hand on former insulation layer or dam concrete surface, many detecting instruments, circuit etc. may be there is and be embedded into, rebuild the destruction may causing these facilities; If but do not process, occur that damaged place can get more and more, breakage is also aggravated further, and concrete, because occurring crack thus losing protective effect, can have a strong impact on the safety that dam runs.Therefore, the method strengthening dam heat and moisture preserving raising cracking resistance is worked out particularly important.
Summary of the invention
The object of the invention is the weak point overcoming prior art, on the basis that existing case history is investigated, and take into full account on the basis of dam concrete heat and moisture preserving guard system characteristic, research and propose and strengthen the method that dam heat and moisture preserving improves cracking resistance.
In order to reach above-mentioned technical characteristic, the object of the present invention is achieved like this:
Strengthen the method that dam heat and moisture preserving improves cracking resistance, it is characterized in that, it comprises the following steps: the first step, and cleaning is carried out on former insulation layer (2) surface impaired to dam concrete dam facing (1); Second step, the moisture-heat preservation confining bed (3) new at former insulation layer (2) surface coverage one deck seals; 3rd step, at moisture-heat preservation confining bed (3) surface coverage one deck overcoat (4);
What described moisture-heat preservation confining bed (3) adopted is hard polyurethane foam material;
Covering the new moisture-heat preservation confining bed (3) of one deck in described second step is adopt spraying coating process, adopts polyurethane spray automatic doubler surface glouer hard polyurethane foam to be covered the surface of smooth good former insulation layer (2) by spray gun with in its crack section.
In the described first step, cleaning mainly processes the foreign material of the impaired inside, crack produced afterwards of former insulation layer (2), pats whole by the surface of former insulation layer (2) and crack section part.
Described 3rd step is optional step.
Described overcoat (4) can adopt the materials such as mortar, polyester mortar, anti-aging finish paint and polyureas.
The color of described overcoat (4) can adjust.
The thickness of described moisture-heat preservation confining bed (3) is within the scope of 1cm ~ 10cm.
The thickness of described overcoat (4) is within the scope of 0.5cm ~ 5cm.
The present invention has following beneficial effect:
Strengthen the method that dam heat and moisture preserving improves cracking resistance, by covering one deck moisture-heat preservation confining bed on the former insulation layer of original impaired concrete dam facing, and then cover one deck overcoat, by above-mentioned means of defence, can repair impaired former insulation layer very well, the gap occurred is closed, prevents from destroying further under external force, reach heat and moisture preserving effect.
In the above-mentioned first step, cleaning mainly processes the foreign material of the impaired inside, crack produced afterwards of former insulation layer, pats whole, can be improved the bonding force of subsequent polyurethane rigid foam by smooth process, improve its repairing effect by primary fracture section part.
What above-mentioned moisture-heat preservation confining bed adopted is hard polyurethane foam material, and this have the advantages such as thermal and insulating performance is better relative to original benzene plate.
Covering the new moisture-heat preservation confining bed of one deck in above-mentioned second step is adopt spraying coating process, polyurethane spray automatic doubler surface glouer is adopted hard polyurethane foam to be covered the surface of smooth good former insulation layer by spray gun with in its crack section, adopt spraying equipment to improve efficiency of construction, ensure construction quality simultaneously.
Above-mentioned overcoat can adopt the materials such as mortar, polyester mortar, anti-aging finish paint and polyureas, adopts overcoat can further protect moisture-heat preservation confining bed to improve its performance.
Above-mentioned 3rd step is optional step, thus this step of selection that can be actual suitable according to engineering.
The color of above-mentioned overcoat can adjust, by changing the effect that its color can reach attractive in appearance.
The thickness of above-mentioned moisture-heat preservation confining bed is within the scope of 1cm ~ 10cm.
The thickness of above-mentioned overcoat is within the scope of 0.5cm ~ 5cm.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is the enforcement sectional drawing (dam type is gravity dam) that the present invention strengthens the means of defence of dam heat and moisture preserving cracking resistance.
Fig. 2 is the enforcement sectional drawing (dam type is arch dam) that the present invention strengthens the means of defence of dam heat and moisture preserving cracking resistance.
In figure: concrete dam facing 1, former insulation layer 2, moisture-heat preservation confining bed 3, overcoat 4, former moisture-heat preservation confining bed 5.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the present invention are described further.
See Fig. 1, for the method for the enhancing dam heat and moisture preserving raising cracking resistance that gravity dam specific embodiments of the invention provide, the method comprises the following steps:
The first step, cleaning is carried out on former insulation layer 2 surface impaired to dam concrete dam facing 1;
Second step, the moisture-heat preservation confining bed 3 new at former insulation layer 2 surface coverage one deck seals;
3rd step, at moisture-heat preservation confining bed 3 surface coverage one deck overcoat 4.
Preferred scheme, in the first step, cleaning mainly processes the foreign material of the impaired inside, crack produced afterwards of former insulation layer 2, pats whole by primary fracture section part.
Preferred scheme, what described moisture-heat preservation confining bed 3 adopted is hard polyurethane foam material.
Preferred scheme, covering the new moisture-heat preservation confining bed 3 of one deck in second step is adopt spraying coating process, adopts polyurethane spray automatic doubler surface glouer to be covered in the smooth good crack section of former insulation layer 2 by spray gun by hard polyurethane foam.
Preferred scheme, described overcoat 4 can adopt the materials such as mortar, polyester mortar, anti-aging finish paint and polyureas.
Preferred scheme, the color of described overcoat 4 can adjust.
Preferred scheme, the thickness of described moisture-heat preservation confining bed 3 is within the scope of 1cm ~ 10cm.
Preferred scheme, the thickness of described overcoat 4 is within the scope of 0.5cm ~ 5cm.
Preferred scheme, the 3rd described step can select operation according to engineering practice.
Optional scheme, described overcoat 4 adopt the thickness of anti-aging finish paint within the scope of 0.1mm ~ 2mm.
Optional scheme, described anti-aging topcoat material can change heat and moisture preserving confining bed color, plays effect that is attractive in appearance and protection.
See Fig. 2, for the method for the enhancing dam heat and moisture preserving raising cracking resistance that arch dam specific embodiments of the invention provide, the method comprises the following steps:
The first step, cleaning is carried out on the former insulation layer 2 impaired to dam concrete dam facing 1 and former moisture-heat preservation confining bed 5 surface;
Second step, the moisture-heat preservation confining bed 3 new at former moisture-heat preservation confining bed 5 surface coverage one deck seals;
3rd step, at moisture-heat preservation confining bed 3 surface coverage one deck overcoat 4.
Preferred scheme, in the first step, cleaning mainly processes the foreign material of the impaired inside, crack produced afterwards of former insulation layer 2, pats whole by primary fracture section part.
Preferred scheme, what described moisture-heat preservation confining bed 3 adopted is hard polyurethane foam material.
Preferred scheme, covering the new moisture-heat preservation confining bed 3 of one deck in second step is adopt spraying coating process, adopts polyurethane spray automatic doubler surface glouer to be injected in the smooth good crack section of former insulation layer 2 by spray gun by hard polyurethane foam.
Preferred scheme, described overcoat 4 can adopt the materials such as mortar, polyester mortar, anti-aging finish paint and polyureas.Preferred scheme, the color of described overcoat 4 can adjust.
Preferred scheme, the 3rd described step can select operation according to engineering practice.
Preferred scheme, the thickness of described moisture-heat preservation confining bed 3 is within the scope of 1cm ~ 10cm.
Preferred scheme, the thickness of described overcoat 4 is within the scope of 0.5cm ~ 5cm.
Optional scheme, described overcoat 4 can adopt anti-aging topcoat material.
Optional scheme, described overcoat 4 adopt the thickness of anti-aging finish paint within the scope of 0.1mm ~ 2mm.
Optional scheme, described anti-aging topcoat material can change heat and moisture preserving confining bed color, plays effect that is attractive in appearance and protection.
Polyurethane heat-insulation moisturizing confining bed of the present invention is compared relative to former insulation layer benzene plate, has the following advantages:
1, material excellent thermal insulation performance: polyurethane heat-insulation material which can retain moisture coefficient of thermal conductivity is at below 0.022W/m.k, and benzene plate coefficient of thermal conductivity is at about 0.034W/m.k, and other heat insulating material coefficient of thermal conductivity is higher; Coefficient of thermal conductivity is lower, and thermal and insulating performance is better, so the polyurethane heat insulation material heat-insulating property clearly as confining bed is better.
2, material performance of keeping humidity is effective: polyurethane heat-insulation material which can retain moisture is except having excellent heat-insulating property, also there is good moistening effect, due to its monoblock seamless link, dam concrete moisture is locked in insulation layer inside, simultaneously extraneous dry air cannot arrive dam facing through heat and moisture preserving confining bed, can ensure that interior humidity does not disturb by external condition, there is good moistening effect.
3, construction technology is advanced: former insulation layer adopts the mode of artificial brushing adhesive stick, and one block of square polystyrene board heat-insulatation material of block is pasted onto dam concrete surface, and part adopts insulating anchor bolt or cork to be fixed.Polyurethane heat-insulation moisturizing confining bed adopts the mode of mechanically spraying to carry out.Both compare, and polyurethane heat-insulation moisturizing confining bed construction technology is advanced, and speed of application is fast; integral seamless connects; adhesive property is good, is applicable to the construction of dam body complex region and different curvature segmental arc, particularly can better protects for the region that dam body property at parts of edges and corners iso-stress is larger.
4, fire prevention and good endurance: polyurethane heat-insulation moisturizing confining bed itself is a kind of adhesive of high strength, adding after blowing agent makes foam, its bonding force is still very strong, still well can combine with concrete, polyurethane has corrosion resistance and can not be corroded by sewage, after former insulation layer benzene plate bubble, water imbibition is strong, by on-the-spot actual observation and detection, 40kg can be reached after the benzene plate of part 0.6m × 1.5m specification is soaked, exceed weight more than 400% own, the soaked rear adhesive property of bonding adhesive also declines, cause SEA LEVEL VARIATION district that a large amount of obscission occurs, in addition benzene plate fireproof performance is poor, polyurethane has good heat and flame.
Described above: by covering one layer of heat preservation moisturizing confining bed again to the former insulation layer of dam damaged part, for the hard polyurethane foam heat and moisture preserving layer of one deck 1cm ~ 10cm that constructs, utilize the performance of new material excellence, can when not damaging original dam concrete heat insulation system, block various breach and crack, increase adhesive property, reach and improve the object that insulation increases performance of keeping humidity and cracking resistance simultaneously.
Described overcoat selects suitable material and construction technology, both can reduce extraneous stress to the impact of heat and moisture preserving layer and destruction, increase its durability, also can be optimized dam overall appearance by control color and planeness simultaneously.As material can select mortar and polyester mortar, thickness can within the scope of 0.5cm ~ 5cm; Also the form covering one deck anti-aging finish paint can adopted to carry out, and thickness can within the scope of 0.1mm ~ 2mm; Heat and moisture preserving confining bed color can both be changed, play effect that is attractive in appearance and protection.
Claims (7)
1. strengthen the method that dam heat and moisture preserving improves cracking resistance, it is characterized in that, it comprises the following steps: the first step, and cleaning is carried out on former insulation layer (2) surface impaired to dam concrete dam facing (1); Second step, the moisture-heat preservation confining bed (3) new at former insulation layer (2) surface coverage one deck seals; 3rd step, at moisture-heat preservation confining bed (3) surface coverage one deck overcoat (4);
What described moisture-heat preservation confining bed (3) adopted is hard polyurethane foam material;
Covering the new moisture-heat preservation confining bed (3) of one deck in described second step is adopt spraying coating process, adopts polyurethane spray automatic doubler surface glouer hard polyurethane foam to be covered the surface of smooth good former insulation layer (2) by spray gun with in its crack section.
2. enhancing dam heat and moisture preserving according to claim 1 improves the method for cracking resistance, it is characterized in that: in the first step, cleaning mainly processes the foreign material of the impaired inside, crack produced afterwards of former insulation layer (2), pats whole by the surface of former insulation layer (2) and crack section part.
3. enhancing dam heat and moisture preserving according to claim 1 improves the method for cracking resistance, it is characterized in that: described 3rd step is optional step.
4. enhancing dam heat and moisture preserving according to claim 1 improves the method for cracking resistance, it is characterized in that: described overcoat (4) can adopt the materials such as mortar, polyester mortar, anti-aging finish paint and polyureas.
5. enhancing dam heat and moisture preserving according to claim 1 improves the method for cracking resistance, it is characterized in that: the color of described overcoat (4) can adjust.
6. enhancing dam heat and moisture preserving according to claim 1 improves the method for cracking resistance, it is characterized in that: the thickness of described moisture-heat preservation confining bed (3) is within the scope of 1cm ~ 10cm.
7. the enhancing dam heat and moisture preserving according to claim 1 or 3 improves the method for cracking resistance, it is characterized in that: the thickness of described overcoat (4) is within the scope of 0.5cm ~ 5cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510092325.1A CN104805805B (en) | 2015-03-02 | 2015-03-02 | Method for enhancing thermal insulation, moisture retention and anti-cracking performances of dam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510092325.1A CN104805805B (en) | 2015-03-02 | 2015-03-02 | Method for enhancing thermal insulation, moisture retention and anti-cracking performances of dam |
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| CN104805805A true CN104805805A (en) | 2015-07-29 |
| CN104805805B CN104805805B (en) | 2017-01-18 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826387A (en) * | 2019-02-13 | 2019-05-31 | 江苏尼高科技有限公司 | It is non-to root out formula outer thermal-insulation decorative restorative procedure |
| CN111778934A (en) * | 2020-07-23 | 2020-10-16 | 中国科学院西北生态环境资源研究院 | Heat-preservation and heat-storage anti-freezing structure for reservoir dam in cold region |
| CN113863215A (en) * | 2021-10-26 | 2021-12-31 | 中电建十一局工程有限公司 | Dam concrete overwintering heat preservation method for high-cold high-altitude areas |
| CN114960563A (en) * | 2022-04-29 | 2022-08-30 | 宜昌天宇科技有限公司 | Anti-aging structure and method along with increase of strength of dam concrete for long time |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1067241B1 (en) * | 1999-07-05 | 2005-12-14 | Max Aicher Recycling GmbH | Basin construction for catchment of a traffic road |
| CN201865259U (en) * | 2010-12-03 | 2011-06-15 | 吉林省志惠防腐保温工程有限公司 | Roof polyurethane composite heat insulating and waterproof system |
| CN203080482U (en) * | 2013-03-01 | 2013-07-24 | 中国水电顾问集团北京勘测设计研究院 | Roller compacted concrete dam structure applicable to cold environment |
| CN203346852U (en) * | 2013-04-16 | 2013-12-18 | 新疆额尔齐斯河流域开发工程建设管理局 | Anti-seepage and heat-insulation integrated system of dam |
-
2015
- 2015-03-02 CN CN201510092325.1A patent/CN104805805B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1067241B1 (en) * | 1999-07-05 | 2005-12-14 | Max Aicher Recycling GmbH | Basin construction for catchment of a traffic road |
| CN201865259U (en) * | 2010-12-03 | 2011-06-15 | 吉林省志惠防腐保温工程有限公司 | Roof polyurethane composite heat insulating and waterproof system |
| CN203080482U (en) * | 2013-03-01 | 2013-07-24 | 中国水电顾问集团北京勘测设计研究院 | Roller compacted concrete dam structure applicable to cold environment |
| CN203346852U (en) * | 2013-04-16 | 2013-12-18 | 新疆额尔齐斯河流域开发工程建设管理局 | Anti-seepage and heat-insulation integrated system of dam |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826387A (en) * | 2019-02-13 | 2019-05-31 | 江苏尼高科技有限公司 | It is non-to root out formula outer thermal-insulation decorative restorative procedure |
| CN111778934A (en) * | 2020-07-23 | 2020-10-16 | 中国科学院西北生态环境资源研究院 | Heat-preservation and heat-storage anti-freezing structure for reservoir dam in cold region |
| CN113863215A (en) * | 2021-10-26 | 2021-12-31 | 中电建十一局工程有限公司 | Dam concrete overwintering heat preservation method for high-cold high-altitude areas |
| CN114960563A (en) * | 2022-04-29 | 2022-08-30 | 宜昌天宇科技有限公司 | Anti-aging structure and method along with increase of strength of dam concrete for long time |
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| Publication number | Publication date |
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| CN104805805B (en) | 2017-01-18 |
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