CN110144857A - A kind of method of panel concrete rock-fill dams toe board anticracking - Google Patents
A kind of method of panel concrete rock-fill dams toe board anticracking Download PDFInfo
- Publication number
- CN110144857A CN110144857A CN201910444861.1A CN201910444861A CN110144857A CN 110144857 A CN110144857 A CN 110144857A CN 201910444861 A CN201910444861 A CN 201910444861A CN 110144857 A CN110144857 A CN 110144857A
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- China
- Prior art keywords
- toe board
- concrete
- anticracking
- rock
- thickness
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- 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.)
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Classifications
-
- 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
-
- 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
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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)
- Foundations (AREA)
Abstract
The invention discloses a kind of methods of panel concrete rock-fill dams toe board anticracking, first basic leveling concrete is poured in the plinth foundation after excavation, then the brushing pitch grease on basic leveling concrete, toe board is poured again, then the anchor pole of connection toe board, basic leveling concrete and plinth foundation is inserted on toe board, the seepage proof curtain constructed under toe board again, finally the spray coating heat preservation moisturizing polyurethane on the outside of toe board, entire construction are completed.The method effectively avoids the crack generated when toe board pours due to plinth foundation constraint, ensure that toe board structure meets antiseepage and the requirement of safety and stability.
Description
Technical field
The present invention relates to panel concrete rock-fill dams, especially prevent the panel for generating crack in toe board concrete construction mixed
The method of solidifying mound masonry dam toe board anticracking.
Background technique
Toe board is the concrete structure for being arranged in panel periphery in concrete face rockfill dam, being seated on ground, is passed through
Periphery fissure equipped with sealing is linked together with panel, forms the impervious body of the dam foundation or more, while being linked again with basement rock, and ground is closed
Leakage passage below, so that upper and lower leakage preventing structure be made to be linked as entirety.
The compression strength of toe board concrete is higher, and elasticity modulus is big, and Poisson ratio is small, and concrete own vol is restricted；
More cement consumption generates the higher heat of hydration in toe board work progress, especially in the proportion of early application, accordingly
Biggish drying shrinkage is generated, at this time by the constraint of basic rock mass, temperature change, causes to crack in addition.And basic scar integrality
Difference, the difference that rises and falls is big, and concrete thickness is uneven, and the reason of generation crack.
Summary of the invention
The technical problem to be solved by the invention is to provide a kind of methods of panel concrete rock-fill dams toe board anticracking, protect
Card toe board structure meets antiseepage and the requirement of safety and stability.
The technical solution adopted by the present invention is that: a kind of method of panel concrete rock-fill dams toe board anticracking, first after excavation
Plinth foundation on pour basic leveling concrete, the then brushing pitch grease on basic leveling concrete, then pour toe board,
Then the anchor pole of connection toe board, basic leveling concrete and plinth foundation, then the antiseepage curtain under toe board of constructing are inserted on toe board
Curtain, finally the spray coating heat preservation moisturizing polyurethane on the outside of toe board, entire construction are completed.
The basis leveling concrete avoids the uneven generation crack of toe board concrete thickness with a thickness of 30~50cm.
The heat and moisture preserving polyurethane avoids internal-external temperature difference variation that toe board is caused to crack with a thickness of 5~8cm.
The pitch grease avoids toe board from being constrained when pouring by basic leveling concrete and generates crack with a thickness of 2~3mm.
The beneficial effects of the present invention are: avoiding the principal element for generating crack in toe board construction from influencing, so as to avoid toe
Plank split generates, and enables the operation that toe board is safe and reliable.The method simple economy, and improve the safety of toe board structure
Property.
Detailed description of the invention
Fig. 1 is the structure chart of panel concrete rock-fill dams toe board anticracking of the invention.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and detailed description:
As shown in Figure 1, the method for panel concrete rock-fill dams toe board anticracking of the invention, the first plinth foundation after excavation
Basic leveling concrete 1 is poured on 6, then the brushing pitch grease 2 on basic leveling concrete 1, then pour toe board 3, then
The anchor pole 5 of insertion connection toe board 3, basic leveling concrete 1 and plinth foundation 6 on toe board 3, then the antiseepage under toe board 3 of constructing
Curtain 7, finally in 3 outside spray coating heat preservation moisturizing polyurethane 4 of toe board, entire construction is completed.
The basis leveling concrete 1 avoids unevenly being also easy to produce for toe board concrete thickness from splitting with a thickness of 30~50cm
Seam.
The heat and moisture preserving polyurethane 4 avoids internal-external temperature difference variation that toe board 3 is caused to crack with a thickness of 5~8cm.
The pitch grease 2 avoids toe board 3 from being generated when pouring by the constraint of basic leveling concrete 1 and splits with a thickness of 2~3mm
Seam.
Specifically, comprising the following steps:
1, basic leveling concrete 1 first is poured in the plinth foundation 6 after excavation, is poured after avoiding excessive fluctuating difference from causing
Toe board 3 cracks；
2, the brushing pitch grease 2 on basic leveling concrete 1, to reduce basic leveling concrete 1 to the strong about of toe board 3
Shu Zuoyong；
3, the anchor pole 5 for connection toe board 3, basis leveling concrete 1 and the plinth foundation 6 of constructing on toe board 3, to guarantee to apply
Enough lid weight power is provided when seepage proof curtain 7 under work toe board 3；
4, in 3 outside spray coating heat preservation moisturizing polyurethane 4 of toe board, so that toe board 3 obtains heat and moisture preserving, to avoid generating temperature
Spend crack.
The heat and moisture preserving polyurethane 4 is to be mixed with diisocyanate resin and end hydroxy polyether by 1:1.
For example, certain engineering, basic leveling concrete 1 is first poured in the plinth foundation 6 after excavation, 30~50cm of thickness,
The cracking of toe board 3 is poured after avoiding excessive fluctuating difference from causing；Then 2mm thickness pitch grease 2 is brushed on basic leveling concrete 1,
It is acted on reducing basic leveling concrete 1 to the strong constraint of toe board 3；It is poured the toe board 3 with a thickness of 1.5m, is constructed on toe board 3
The anchor pole 5 of toe board 3, basic leveling concrete 1 and plinth foundation 6 is connected, length 9m enters rock 7.5m；The antiseepage constructed under toe board 3
Curtain 7；In toe board 3 outside spray coating heat preservation moisturizing polyurethane 4, thickness 5cm, so that toe board 3 obtains heat and moisture preserving, to avoid producing
Raw thermal cracking.It is good using operational effect after engineering construction, crack is not found.
Example described above is merely to illustrate technical idea and feature of the invention, and its object is to those skilled in the art
Member only cannot limit the scope of the patents of the invention with this example it will be appreciated that the contents of the present invention and implement accordingly, i.e., and all
Same changes or modifications made by revealed spirit are invented, are still fallen within the scope of the present invention.
Claims (4)
1. a kind of method of panel concrete rock-fill dams toe board anticracking, which is characterized in that first in the plinth foundation (6) after excavation
Basic leveling concrete (1) is poured, then the brushing pitch grease (2) on basic leveling concrete (1), then pours toe board (3),
Then insertion connects the anchor pole (5) of toe board (3), basic leveling concrete (1) and plinth foundation (6) on toe board (3), then constructs
Seepage proof curtain (7) under toe board (3), finally the spray coating heat preservation moisturizing polyurethane (4) on the outside of toe board (3), entire construction are completed.
2. the method for panel concrete rock-fill dams toe board anticracking according to claim 1, which is characterized in that the basis is levelling
Concrete (1) avoids the uneven generation crack of toe board concrete thickness with a thickness of 30~50cm.
3. the method for panel concrete rock-fill dams toe board anticracking according to claim 1, which is characterized in that the heat and moisture preserving
Polyurethane (4) avoids internal-external temperature difference variation that toe board (3) is caused to crack with a thickness of 5~8cm.
4. the method for panel concrete rock-fill dams toe board anticracking according to claim 1, which is characterized in that the pitch grease
(2) it with a thickness of 2~3mm, avoids toe board (3) from being constrained when pouring by basic leveling concrete (1) and generates crack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910444861.1A CN110144857A (en) | 2019-05-24 | 2019-05-24 | A kind of method of panel concrete rock-fill dams toe board anticracking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910444861.1A CN110144857A (en) | 2019-05-24 | 2019-05-24 | A kind of method of panel concrete rock-fill dams toe board anticracking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110144857A true CN110144857A (en) | 2019-08-20 |
Family
ID=67592114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910444861.1A Pending CN110144857A (en) | 2019-05-24 | 2019-05-24 | A kind of method of panel concrete rock-fill dams toe board anticracking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110144857A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5595457A (en) * | 1995-03-14 | 1997-01-21 | Stucks; Mark A. | Storm drainage underflow dam unit |
| CN101644041A (en) * | 2009-08-27 | 2010-02-10 | 中国水电顾问集团华东勘测设计研究院 | Face rockfill dam toe board structure constructed on completely weathered bed rock and construction method thereof |
| CN101906768A (en) * | 2010-08-19 | 2010-12-08 | 中国水电建设集团十五工程局有限公司 | Panel construction method of concrete faced rock-fill dam |
| KR101455186B1 (en) * | 2014-07-18 | 2014-10-28 | 주식회사 삼안 | A waterproof plate for flooding prevention |
| CN108316251A (en) * | 2018-02-06 | 2018-07-24 | 浙江大学 | A method of Face Slab of Concrete of Rock-fill Dam is reinforced using superhigh tenacity cement-base composite material |
-
2019
- 2019-05-24 CN CN201910444861.1A patent/CN110144857A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5595457A (en) * | 1995-03-14 | 1997-01-21 | Stucks; Mark A. | Storm drainage underflow dam unit |
| CN101644041A (en) * | 2009-08-27 | 2010-02-10 | 中国水电顾问集团华东勘测设计研究院 | Face rockfill dam toe board structure constructed on completely weathered bed rock and construction method thereof |
| CN101906768A (en) * | 2010-08-19 | 2010-12-08 | 中国水电建设集团十五工程局有限公司 | Panel construction method of concrete faced rock-fill dam |
| KR101455186B1 (en) * | 2014-07-18 | 2014-10-28 | 주식회사 삼안 | A waterproof plate for flooding prevention |
| CN108316251A (en) * | 2018-02-06 | 2018-07-24 | 浙江大学 | A method of Face Slab of Concrete of Rock-fill Dam is reinforced using superhigh tenacity cement-base composite material |
Non-Patent Citations (2)
| Title |
|---|
| 《中国水力发电年鉴》编辑部: "《中国水力发电年鉴，2004年》", 31 December 2005, 中国电力出版社 * |
| 孙惠兰: "松塔水库可行性设计中坝型的选择", 《山西水利科技》 * |
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| 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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190820 |