CN104805805B - 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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- CN104805805B CN104805805B CN201510092325.1A CN201510092325A CN104805805B CN 104805805 B CN104805805 B CN 104805805B CN 201510092325 A CN201510092325 A CN 201510092325A CN 104805805 B CN104805805 B CN 104805805B
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- heat
- dam
- moisture
- layer
- cracking resistance
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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 is and in particular to strengthen the side that dam heat and moisture preserving improves cracking resistance
Method.
Background technology
In order to reduce the impact greatly to dam concrete of cold wave and the low temperature of cold district and the temperature difference, hydraulic engineering field work
Author employs multiple heat and moisture preserving preventive means and dam is protected, and the two kinds of means of defences commonly used at present are: one is logical
Cross bonding and one piece of block benzene plate is assembled in dam surface and is incubated by the mode of anchoring, part engineering is for attractive in appearance and durability
Also it is cladded with being stamped layer protective layer in polystyrene board heat-insulatation layer；Another kind of method is using spraying coating process, hard polyurethane foam is overall
Seamless covering, on dam concrete surface, is cladded with being stamped layer protective layer in heat and moisture preserving froth bed simultaneously.
But, find through long-term engineering operation, particularly some engineering projects of early stage, using benzene plate etc., some have
The seam concrete dam that is incubated of connecting material, under strong wind, cold wave low temperature, infiltration, the external force effect such as ice is swollen, its insulation guarantor
Wet layer and overcoat occur in that a certain degree of damage, and some damages are than more serious.
For these damaged parts, such as whole removing re-starts heat and moisture preserving and construction of prevention work, on the one hand due to removing
Engineering cost can be greatly increased with rebuilding dam heat and moisture preserving Anti-crack system, both uneconomical, also not environmentally；On the other hand in former guarantor
Warm layer or dam concrete surface, it is understood that there may be many detecting instruments, circuit etc. are embedded into, rebuild and are likely to result in these facilities
Destroy；But if do not processed, damaged place can get more and more, and breakage is also further exacerbated by, and concrete is because occurring
Crack, thus losing protective effect, can have a strong impact on the safety of dam operation.Therefore, work out enhancing dam heat and moisture preserving to carry
The method of high cracking resistance energy is particularly important.
Content of the invention
The purpose of the present invention is the weak point overcoming prior art, on the basis of to the investigation of existing case history, and
On the basis of taking into full account dam concrete heat and moisture preserving guard system characteristic, research and propose enhancing dam heat and moisture preserving raising anti-
The method of fragility energy.
In order to reach above-mentioned technical characteristic, the object of the present invention is achieved like this:
Strengthen dam heat and moisture preserving and improve the method for cracking resistance it is characterised in that it comprises the following steps: the first step,
Former heat-insulation layer (2) surface impaired to dam concrete dam facing (1) is cleaned processing；Second step, on former heat-insulation layer (2) surface
Cover one layer of new moisture-heat preservation confining bed (3) to be sealed；3rd step, covers one layer on moisture-heat preservation confining bed (3) surface
Overcoat (4)；
Described moisture-heat preservation confining bed (3) uses hard polyurethane foam material；
Covering one layer of new moisture-heat preservation confining bed (3) in described second step is to adopt spraying coating process, using polyurethane spray
Hard polyurethane foam is covered in surface and its crack section of smooth good former heat-insulation layer (2) by automatic doubler surface glouer by spray gun.
In the described first step, mainly debris crack within that afterwards produce impaired to former heat-insulation layer (2) are carried out cleaning treatment
Process, the surface of former heat-insulation layer (2) and crack section part are patted whole.
Described 3rd step is optional step.
Described overcoat (4) can be using materials such as mortar, polyester mortar, anti-aging finish paint and polyureas.
The color of described overcoat (4) can be adjusted.
The thickness of described moisture-heat preservation confining bed (3) is in the range of 1cm ~ 10cm.
The thickness of described overcoat (4) is in the range of 0.5cm ~ 5cm.
The method have the advantages that:
Strengthen the method that dam heat and moisture preserving improves cracking resistance, be by the former guarantor in original impaired concrete dam facing
Cover one layer of moisture-heat preservation confining bed on warm layer, then cover one layer of overcoat again, by above-mentioned means of defence, can be fine
Impaired former heat-insulation layer is repaired, the gap occurring is closed, prevents from destroying further under external force, reach guarantor
Warm moistening effect.
In the above-mentioned first step, mainly debris crack within that afterwards produce impaired to former heat-insulation layer are carried out cleaning treatment
Process, primary fracture section part is patted whole, the bonding force of subsequent polyurethane rigid foam can be improved by smooth process, carry
Its repairing effect high.
Above-mentioned moisture-heat preservation confining bed uses hard polyurethane foam material, and this have with respect to original benzene plate
The advantages of thermal and insulating performance is better.
Covering one layer of new moisture-heat preservation confining bed in above-mentioned second step is to adopt spraying coating process, is coated with using polyurethane spray
For covering in surface and its crack section of smooth good former heat-insulation layer hard polyurethane foam by spray gun, using spraying
Equipment can improve efficiency of construction, ensure construction quality simultaneously.
Above-mentioned overcoat can be using materials such as mortar, polyester mortar, anti-aging finish paint and polyureas, can using overcoat
Further protection moisture-heat preservation confining bed improves its performance.
Above-mentioned 3rd step is optional step such that it is able to according to actual suitable this step of selection of engineering.
The color of above-mentioned overcoat can be adjusted, and can reach effect attractive in appearance by changing its color.
The thickness of above-mentioned moisture-heat preservation confining bed is in the range of 1cm ~ 10cm.
The thickness of above-mentioned overcoat is in the range of 0.5cm ~ 5cm.
Brief description
The invention will be further described with reference to the accompanying drawings and examples.
(dam type is gravity to the enforcement profile of the means of defence for present invention enhancing dam heat and moisture preserving cracking resistance for the Fig. 1
Dam).
(dam type is arch to the enforcement profile of the means of defence for present invention enhancing dam heat and moisture preserving cracking resistance for the Fig. 2
Dam).
In figure: concrete dam facing 1, former heat-insulation layer 2, moisture-heat preservation confining bed 3, overcoat 4, former moisture-heat preservation confining bed 5.
Specific embodiment
Below in conjunction with the accompanying drawings embodiments of the present invention are described further.
Referring to Fig. 1, the enhancing dam heat and moisture preserving for the specific embodiment offer of the gravity dam present invention improves crack resistance
The method of energy, the method comprises the following steps:
The first step, former heat-insulation layer 2 surface impaired to dam concrete dam facing 1 is cleaned processing；
Second step, covers one layer of new moisture-heat preservation confining bed 3 on former heat-insulation layer 2 surface and is sealed；
3rd step, covers one layer of overcoat 4 on moisture-heat preservation confining bed 3 surface.
Preferably scheme, miscellaneous within the crack producing after cleaning treatment is mainly impaired to former heat-insulation layer 2 in the first step
Thing is processed, and primary fracture section part is patted whole.
Preferably scheme, described moisture-heat preservation confining bed 3 uses hard polyurethane foam material.
Preferably scheme, covering one layer of new moisture-heat preservation confining bed 3 in second step is to adopt spraying coating process, using poly- ammonia
Hard polyurethane foam is covered in the smooth good crack section of former heat-insulation layer 2 by ester spraying equipment by spray gun.
Preferably scheme, described overcoat 4 can be using materials such as mortar, polyester mortar, anti-aging finish paint and polyureas.
Preferably scheme, the color of described overcoat 4 can be adjusted.
Preferably scheme, the thickness of described moisture-heat preservation confining bed 3 is in the range of 1cm ~ 10cm.
Preferably scheme, the thickness of described overcoat 4 is in the range of 0.5cm ~ 5cm.
Preferably scheme, the 3rd described step can select operation according to engineering practice.
Optional scheme, the thickness of described the adopted anti-aging finish paint of overcoat 4 is in the range of 0.1mm ~ 2mm.
Optional scheme, described anti-aging topcoat material can change heat and moisture preserving confining bed color, play attractive in appearance and
The effect of protection.
Referring to Fig. 2, the enhancing dam heat and moisture preserving for the specific embodiment offer of the arch dam present invention improves cracking resistance
Method, the method comprises the following steps:
The first step, the former heat-insulation layer 2 impaired to dam concrete dam facing 1 and former moisture-heat preservation confining bed 5 surface are carried out clearly
Clean process；
Second step, covers one layer of new moisture-heat preservation confining bed 3 on former moisture-heat preservation confining bed 5 surface and is sealed；
3rd step, covers one layer of overcoat 4 on moisture-heat preservation confining bed 3 surface.
Preferably scheme, miscellaneous within the crack producing after cleaning treatment is mainly impaired to former heat-insulation layer 2 in the first step
Thing is processed, and primary fracture section part is patted whole.
Preferably scheme, described moisture-heat preservation confining bed 3 uses hard polyurethane foam material.
Preferably scheme, covering one layer of new moisture-heat preservation confining bed 3 in second step is to adopt spraying coating process, using poly- ammonia
Hard polyurethane foam is injected in the smooth good crack section of former heat-insulation layer 2 by ester spraying equipment by spray gun.
Preferably scheme, described overcoat 4 can be using materials such as mortar, polyester mortar, anti-aging finish paint and polyureas.Excellent
The scheme of choosing, the color of described overcoat 4 can be adjusted.
Preferably scheme, the 3rd described step can select operation according to engineering practice.
Preferably scheme, the thickness of described moisture-heat preservation confining bed 3 is in the range of 1cm ~ 10cm.
Preferably scheme, the thickness of described overcoat 4 is in the range of 0.5cm ~ 5cm.
Optional scheme, described overcoat 4 can adopt anti-aging topcoat material.
Optional scheme, the thickness of described the adopted anti-aging finish paint of overcoat 4 is in the range of 0.1mm ~ 2mm.
Optional scheme, described anti-aging topcoat material can change heat and moisture preserving confining bed color, play attractive in appearance and
The effect of protection.
The polyurethane heat-insulation moisturizing confining bed of the present invention is compared with respect to former heat-insulation layer benzene plate, has the advantage that
1st, material excellent thermal insulation performance: polyurethane heat-insulation moisturizing material thermal conductivity is in below 0.022w/m.k, and benzene plate
, in 0.034w/m.k, other insulation material heat conductivitys are higher for heat conductivity；Heat conductivity is lower, and thermal and insulating performance is got over
Good, it is obvious that the polyurethane heat insulation material heat-insulating property as confining bed is more preferable.
2nd, material performance of keeping humidity effect is good: polyurethane heat-insulation moisturizing material, in addition to having excellent heat-insulating property, also has
Good moistening effect, because its monoblock is seamlessly connected, dam concrete moisture is locked in inside heat-insulation layer, and simultaneously extraneous is dry
Dry air cannot pass through heat and moisture preserving confining bed to reach dam facing it is ensured that interior humidity is not disturbed by external condition, has good
Good moistening effect.
3rd, construction technology is advanced: former heat-insulation layer by the way of artificial brushing adhesive, by square for one piece of block polystyrene board heat-insulatation
Material is pasted onto dam concrete surface, is partly fixed using insulating anchor bolt or cork.Polyurethane heat-insulation moisturizing confining bed
Carried out by the way of mechanically spraying.Both compare, and polyurethane heat-insulation moisturizing confining bed construction technology is advanced, and speed of application is fast,
Integral seamless connects, and adhesive property is good, and the construction of suitable dam body complex region and different curvature segmental arc, especially for dam body
The larger region of property at parts of edges and corners iso-stress can preferably be protected.
4th, fire prevention and good endurance: polyurethane heat-insulation moisturizing confining bed is a kind of binding agent of high intensity in itself, is adding
After foam made by foaming agent, its bonding force is still very strong, remains to combine well with concrete, polyurethane has corrosion resistance not
Can be corroded by sewage, after former heat-insulation layer benzene plate blister, water absorption is strong, by live actual observation and detection, part 0.6m × 1.5m
Up to 40kg after the benzene plate of specification is soaked, exceed weight more than 400% itself, the soaked rear adhesive property of adhesive also declines, and leads to
There are a large amount of obscissions in SEA LEVEL VARIATION area, benzene plate fire protecting performance is poor in addition, and polyurethane has preferable heat and flame.
As described above: by one layer of heat preservation moisturizing confining bed is covered again to the former heat-insulation layer of dam damaged part, to construct
As a example the hard polyurethane foam heat and moisture preserving layer of one layer of 1cm ~ 10cm, using the performance that new material is excellent, can not damage
In the case of original dam concrete heat insulation system, block various breach and crack, increase adhesive property, reach and improve insulation
Increase the purpose of performance of keeping humidity and cracking resistance simultaneously.
Described overcoat selects suitable material and construction technology, both can reduce extraneous stress to heat and moisture preserving layer
Impact and destruction, increase its durability, by controlling color and flatness, dam overall appearance can also be optimized simultaneously.
As material can be selected for mortar and polyester mortar, thickness can be in the range of 0.5cm ~ 5cm；May also be employed covering one layer of anti-aging finish paint
Form carry out, thickness can be in the range of 0.1mm ~ 2mm；Heat and moisture preserving confining bed color can be changed, play attractive in appearance and anti-
The effect of shield.
Claims (8)
1. strengthen dam heat and moisture preserving and improve the method for cracking resistance it is characterised in that it comprises the following steps: the first step is right
Impaired former heat-insulation layer (2) surface of dam concrete dam facing (1) is cleaned processing；Second step, covers on former heat-insulation layer (2) surface
One layer of new moisture-heat preservation confining bed (3) of lid is sealed；3rd step, covers one layer on moisture-heat preservation confining bed (3) surface and prevents
Sheath (4)；
Described moisture-heat preservation confining bed (3) uses hard polyurethane foam material；
Covering one layer of new moisture-heat preservation confining bed (3) in described second step is to adopt spraying coating process, is coated with using polyurethane spray
Covered in surface and its crack section of smooth good former heat-insulation layer (2) by spray gun for by hard polyurethane foam.
2. according to claim 1 strengthen dam heat and moisture preserving improve cracking resistance method it is characterised in that: the first step
Mainly debris crack within that afterwards produce impaired to former heat-insulation layer (2) are processed, by former heat-insulation layer (2) middle cleaning treatment
Surface and crack section part pat whole.
3. according to claim 1 strengthen dam heat and moisture preserving improve cracking resistance method it is characterised in that: described the
One step and second step are implemented, and the 3rd step is not implemented.
4. according to claim 1 strengthen dam heat and moisture preserving improve cracking resistance method it is characterised in that: described
Overcoat (4) adopts mortar, anti-aging finish paint or polyurea materials.
5. according to claim 1 strengthen dam heat and moisture preserving improve cracking resistance method it is characterised in that: described
The color of overcoat (4) can be adjusted.
6. according to claim 1 strengthen dam heat and moisture preserving improve cracking resistance method it is characterised in that: described guarantor
The thickness of wet insulation confining bed (3) is in the range of 1cm ~ 10cm.
7. according to claim 1 strengthen dam heat and moisture preserving improve cracking resistance method it is characterised in that: described
The thickness of overcoat (4) is in the range of 0.5cm ~ 5cm.
8. according to claim 4 strengthen dam heat and moisture preserving improve cracking resistance method it is characterised in that: described sand
Slurry adopts polyester mortar.
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 |
Applications Claiming Priority (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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104805805A CN104805805A (en) | 2015-07-29 |
| CN104805805B true CN104805805B (en) | 2017-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510092325.1A Active 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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Families Citing this family (3)
| 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 |
| 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 |
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| Publication number | Publication date |
|---|---|
| CN104805805A (en) | 2015-07-29 |
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