CN110185000B - Panel waterproof covering structure for ultrahigh panel dam - Google Patents
Panel waterproof covering structure for ultrahigh panel dam Download PDFInfo
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- CN110185000B CN110185000B CN201910465254.3A CN201910465254A CN110185000B CN 110185000 B CN110185000 B CN 110185000B CN 201910465254 A CN201910465254 A CN 201910465254A CN 110185000 B CN110185000 B CN 110185000B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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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
- E02B3/16—Sealings or joints
Abstract
The invention provides a waterproof pavement structure of a panel for an ultrahigh panel dam.A pavement area is also arranged on the surface of the lower section of a concrete panel, and a ballast area is arranged above the pavement area; the paving area is divided into two layers from top to bottom, one layer is a gravel paving layer, and the other layer is a fly ash paving area and a stone powder paving area. By adopting the scheme, the paving arrangement is combined with the auxiliary anti-seepage object in a targeted arrangement, the characteristics of the paving material are fully utilized, and the auxiliary anti-seepage effect of the paving is more reliable. The stone powder excavated on site on the deep covering layer of the deep narrow valley is fully utilized, and the transportation cost of the fly ash is greatly reduced. The stress deformation characteristic of the surface plate combined with the covering area and the weight area sets the elevation range of the covering more scientifically and reasonably. The waterproof layer that sets up can improve concrete panel's life by a wide margin.
Description
Technical Field
The invention relates to the field of rock-fill dam structures of hydraulic and hydroelectric engineering, in particular to a panel waterproof covering structure for an ultrahigh panel dam.
Background
The concrete panel rock-fill dam has the advantages of convenient construction, less influence by climate, short general construction period, relatively low construction cost and the like, and is a novel rock-fill dam which is developed rapidly in water conservancy and hydropower engineering in recent years. With the accelerated development of hydropower construction, the dam construction height of the panel dam is increased, the valley topography is also generally narrow, the panel cover generally covers silt, fine sand, fly ash or other materials on the panel and the peripheral seams, the single covering silting effect has weak pertinence and the construction organization is not flexible enough.
For example, chinese patent document CN203080480U describes an upstream paving structure of a concrete faced rockfill dam, in which a concrete faced rockfill dam is poured on the upstream face, and a concrete toe board is poured on the bottom of the concrete faced rockfill dam, wherein: and building a panel weight block closely attached to the concrete panel, wherein the panel weight block is a straw bag filled with powder, the straw bag pile built by the straw bag is covered with the powder and paved to a designed section, and the powder is covered with the stone slag protective surface. The invention is suitable for water conservancy and hydropower engineering.
The traditional arrangement range is generally paved from the bottom of the panel to the height of 1/2 dams, the stress deformation characteristic during the operation process of the panel is not considered by the system, and the condition that the paving range is larger than the actual requirement and is not economical is possible. In addition, a cover can be arranged at the seam position of the primary panel, and the maintenance in the operation process is inconvenient.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a panel waterproof paving structure for an ultrahigh panel dam, which can be used for locally obtaining materials, reducing the laying cost and improving the anti-seepage effect of paving. In a preferred embodiment, the stress deformation characteristics of the panel can be matched. Is convenient for seam maintenance.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a waterproof pavement structure of a panel for an ultrahigh-face dam is characterized in that a pavement area is further arranged on the surface of the lower section of a concrete panel, and a weight area is arranged above the pavement area;
the paving area is divided into two layers from top to bottom, one layer is a gravel paving layer, and the other layer is a fly ash paving area and a stone powder paving area.
In the preferred scheme, the gravel grading of the gravel covering layer needs to meet the requirements of self-healing and auxiliary anti-seepage functions, the gravel of the gravel covering layer adopts excavating materials of mud-rock accumulation bodies, and the permeability coefficient of the gravel is not more than 1 × 10-5cm/s, the content of particles larger than 5mm is not more than 50%, the content of particles smaller than 0.075mm is more than 15%, and the maximum particle size is not more than 100 mm.
In a preferred scheme, the ballast area is a ballast cover heavy body covered on the paving area so as to protect a gravel paving layer and prevent the instability of gravel soil paving and fine particle loss; and (3) excavating and discarding ballast in the pivot area to fill the ballast in the ballast area, wherein the maximum grain diameter of the ballast is not more than 600mm, and the porosity after compaction is not more than 24%.
In the preferred scheme, a waterproof layer is arranged between the paving area and the concrete panel.
In a preferred scheme, the waterproof layer is a polyurethane waterproof layer;
or the waterproof layer is a modified nano-organosilicon waterproof layer which is sprayed on the surface of the concrete panel, and the surface of the modified nano-organosilicon waterproof layer is also coated with mortar.
In the preferred scheme, the waterproof layer is a polyurethane waterproof layer at the lower section of the concrete panel, the upper section of the waterproof layer is a modified nano-organosilicon waterproof layer, the modified nano-organosilicon waterproof layer is sprayed on the surface of the concrete panel, and mortar is further coated on the surface of the modified nano-organosilicon waterproof layer;
the polyurethane waterproof layer is positioned below the lowest water level line, and the modified nano-organosilicon waterproof layer is positioned above the lowest water level line and comprises a falling belt and a surface of an exposed panel.
The polyurethane waterproof layer is lapped with the modified nano-organosilicon waterproof layer.
In a preferable scheme, the polyurethane waterproof layer is a multilayer, the bottom layer is flexible and is used for being combined with concrete, the hardness of the middle layer is higher than that of the bottom layer and is used for waterproofing, and the top layer is an anti-aging and corrosion-resistant layer.
In a preferred scheme, the modified nano-organosilicon waterproof layer comprises the following components in parts by weight: 2-3 parts of high-boiling-point sodium silanol, 4-5 parts of organic-inorganic hybrid nano resin, 1-3 parts of nano-scale silica sol, 0.1-0.6 part of super-hydrophobic silica, 0.5-1 part of isopropanol, 0.1-0.3 part of polyvinyl alcohol and 0.01-0.2 part of anti-aging agent.
In a preferred embodiment, the top of the cover area and the ballast area is lower than the first-stage joint of the concrete panel.
The invention provides a waterproof blanket structure of a panel for an ultrahigh panel dam, which has the following beneficial effects compared with the prior art by adopting the scheme:
1. the paving arrangement is combined with the auxiliary anti-seepage object, the characteristics of the paving material are fully utilized, and the auxiliary anti-seepage effect of the paving is more reliable.
2. By arranging the panel composite covering structure, the covering material can be selected more flexibly and can better adapt to the construction conditions on site. The stone powder excavated on site on the deep covering layer of the deep narrow valley is fully utilized, and the transportation cost of the fly ash is greatly reduced.
3. The covering material can fully utilize building waste and engineering excavating material, and is economical and environment-friendly.
4. The stress deformation characteristic of the surface plate combined with the covering area and the weight area sets the elevation range of the covering more scientifically and reasonably.
5. The arranged waterproof layer can protect the concrete panel and further improve the anti-seepage effect
6. The paving cover is arranged below the first-stage joint separating position of the concrete panel, so that joint separating maintenance is facilitated.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a schematic upstream-downstream cross-sectional view of the present invention.
Fig. 2 is a schematic front view of the valley topography of the present invention.
Fig. 3 is a schematic partial cross-sectional view of the location of the blanket and ballast areas of the present invention.
In the figure: the gravel paving and protecting system comprises a paving area 1, a gravel paving layer 11, a fly ash paving area 12, a stone powder paving area 13, a waterproof layer 14, a weight area 2, a concrete panel 3, a revetment 4, a transition area 5, a rockfill area 6 and a first-stage parting joint 7.
Detailed Description
In the narrow river valley terrain, the ratio of the width B of the dam body to the height of the dam body is 1:1.13, and the road arrangement is difficult. But also covers a thicker muddy covering layer in the valleys, reaching 85 meters at the deepest. The maximum height of the dam body reaches more than 220 meters. The construction difficulty is high.
As shown in fig. 1 to 3, in the waterproof covering structure for the face plate of the ultra-high face plate dam, a covering area 1 is further arranged on the surface of the lower section of a concrete face plate 3, and a weight area 2 is arranged above the covering area 1;
the paving area 1 is divided into two layers from top to bottom, wherein one layer is a gravel paving layer 11, and the other layer is a fly ash paving area 12 and a stone powder paving area 13. The fly ash and the stone powder in the fly ash paving area 12 and the stone powder paving area 13 can enter into cracks to form plugging when the concrete panel cracks. The thickness of the fly ash covering area 12 and the stone powder covering area 13 is 0.5-1 m, the thickness of the gravel covering layer 11 is 3-5 m, and the gravel covering layer 11 is used for pressing the fly ash and the stone powder and preventing the fly ash and the stone powder from being washed away by water flow and losing.
In a preferred embodiment, the fly ash-covered area 12 is located near the bottom of the concrete panel 3, the stone powder-covered area 13 is located near the concrete panel 3, and the fly ash-covered area 12 and the stone powder-covered area 13 are connected to each other. The stone powder is sieved from clay soil obtained in the process of excavation of a foundation pit.
In the preferred scheme, the gravel material grading of the gravel layer 11 needs to meet the requirements of self-healing and auxiliary anti-seepage functions, the gravel material of the gravel layer 11 adopts excavating materials of mud-rock accumulation bodies, and the permeability coefficient of the gravel material is not more than 1 × 10-5cm/s, the content of particles larger than 5mm is not more than 50%, the content of particles smaller than 0.075mm is more than 15%, and the maximum particle size is not more than 100 mm.
In a preferred scheme, the ballast area 2 is a ballast cover heavy body covered on the paving area 1 to protect the gravel paving layer 11 and prevent the instability of gravel soil paving and fine particle loss; and (3) excavating, discarding and filling the ballast in the ballast area 2 by adopting a pivot area, wherein the maximum grain diameter of the ballast is not more than 600mm, and the porosity after compaction is not more than 24%.
In a preferred scheme, a waterproof layer 14 is arranged between the paving area 1 and the concrete panel 3.
In a preferred scheme, the waterproof layer 14 is a polyurethane waterproof layer;
or the waterproof layer 14 is a modified nano-organosilicon waterproof layer, the modified nano-organosilicon waterproof layer is sprayed on the surface of the concrete panel 3, and mortar is further coated on the surface of the modified nano-organosilicon waterproof layer.
Another preferred scheme is as shown in fig. 3, the waterproof layer 14 is a polyurethane waterproof layer at the lower section of the concrete panel 3, and a modified nano-silicone waterproof layer at the upper section, the modified nano-silicone waterproof layer is sprayed on the surface of the concrete panel 3, and mortar is further coated on the surface of the modified nano-silicone waterproof layer; the mortar can avoid direct scouring of water flow to the modified nano-organosilicon waterproof layer.
The polyurethane waterproof layer is positioned below the lowest water level line, and the modified nano-organosilicon waterproof layer is positioned above the lowest water level line and comprises a falling belt and a surface of an exposed panel. According to the scheme, the temperature below the water level line is constant, the polyurethane waterproof layer is good in effect, the temperature difference change is large at the lowest water level line, particularly at the position of the falling zone, the modified nano-organic silicon waterproof layer is good in ageing resistance and deformation resistance, water vapor can be prevented from being accumulated on the interface, acid corrosion concrete is generated under the cold and hot alternating action, and the service life of the concrete panel 3 is prolonged. The polyurethane waterproof layer is lapped with the modified nano-organosilicon waterproof layer.
In a preferable scheme, the polyurethane waterproof layer is a multilayer, the bottom layer is flexible and is used for being combined with concrete, the hardness of the middle layer is higher than that of the bottom layer and is used for waterproofing, and the top layer is an anti-aging and corrosion-resistant layer. From this multilayer structure, bottom flexible polyurethane can permeate concrete panel 3 in, with concrete close coupling, plays waterproof, fills out hourglass and adnexed effect. The middle layer polyurethane is used to provide elasticity and to connect the layers. The top layer is primarily used to provide uv resistance, aging resistance and corrosion resistance. Through multilayer structure, prolong the life of polyurethane waterproof layer by a wide margin. Wherein the flexible polyurethane, the elastic polyurethane and the anti-aging polyurethane are all commercially available products.
In a preferred scheme, the modified nano-organosilicon waterproof layer comprises the following components in parts by weight: 2-3 parts of high-boiling-point sodium silanol, 4-5 parts of organic-inorganic hybrid nano resin, 1-3 parts of nano-scale silica sol, 0.1-0.6 part of super-hydrophobic silica, 0.5-1 part of isopropanol, 0.1-0.3 part of polyvinyl alcohol and 0.01-0.2 part of anti-aging agent. With this structure, the nanosilica constitutes a microscopic three-dimensional structure, providing water-proof effect and also providing air permeability. In particular, the modified nano-organosilicon waterproof layer is a water-based material, and adopts a construction scheme of directly spraying and then spraying surface mortar, and the subsequent repair and maintenance are very convenient.
In a preferred embodiment, as shown in fig. 1, the top of the paved area 1 and the ballast area 2 is below the primary gap 7 of the concrete panel 3. By the structure, seam-parting maintenance in the later period is facilitated.
The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the technical features described in the present invention can be used in combination with each other without conflict, and the scope of the present invention should be defined by the technical means described in the claims, and equivalents thereof including the technical features described in the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.
Claims (3)
1. The utility model provides a waterproof shop cover structure of panel for superelevation panel dam which characterized by: the surface of the lower section of the concrete panel (3) is also provided with a paving area (1), and a weight area (2) is arranged above the paving area (1);
the paving area (1) is divided into two layers from top to bottom, one layer is a gravel paving layer (11), and the other layer is a fly ash paving area (12) and a stone powder paving area (13);
the gravel material gradation of the gravel layer (11) needs to meet the requirements of self-healing and auxiliary anti-seepage functions, the gravel material of the gravel layer (11) adopts excavating materials of mud-rock accumulation bodies, and the permeability coefficient of the gravel material is not more than 1 × 10-5cm/s, the content of particles larger than 5mm is not more than 50%, the content of particles smaller than 0.075mm is more than 15%, and the maximum particle size is not more than 100 mm;
the ballast area (2) is used for covering ballast weight bodies on the covering area (1) to protect the gravel covering layer (11) and prevent the instability of gravel soil covering and fine particle loss; the ballast in the weight-bearing area (2) is excavated in a hub area, the ballast is abandoned and filled, the maximum grain diameter of the ballast is not more than 600mm, and the porosity after compaction is not more than 24%;
a waterproof layer (14) is arranged between the paving area (1) and the concrete panel (3);
the waterproof layer (14) is a polyurethane waterproof layer at the lower section of the concrete panel (3), a modified nano-organosilicon waterproof layer is at the upper section of the concrete panel, the modified nano-organosilicon waterproof layer is sprayed on the surface of the concrete panel (3), and mortar is further coated on the surface of the modified nano-organosilicon waterproof layer;
the modified nano-organosilicon waterproof layer comprises the following components in parts by weight: 2-3 parts of high-boiling sodium silanol, 4-5 parts of organic-inorganic hybrid nano resin, 1-3 parts of nano-scale silica sol, 0.1-0.6 part of super-hydrophobic silica, 0.5-1 part of isopropanol, 0.1-0.3 part of polyvinyl alcohol and 0.01-0.2 part of anti-aging agent;
the modified nano-organosilicon waterproof layer is positioned above the lowest water line and comprises a falling belt and a surface of an exposed panel;
the polyurethane waterproof layer is lapped with the modified nano-organosilicon waterproof layer.
2. The structure of waterproof decking of panels for an ultra-high panel dam as claimed in claim 1 wherein: the polyurethane waterproof layer is multilayer, the bottom layer is flexible and is used for being combined with concrete, the hardness of the middle layer is higher than that of the bottom layer and is used for preventing water, and the top layer is an anti-aging and corrosion-resistant layer.
3. The structure of waterproof decking of panels for an ultra-high panel dam as claimed in claim 1 wherein: the top ends of the paving area (1) and the weight area (2) are lower than the one-stage seam (7) of the concrete panel (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910465254.3A CN110185000B (en) | 2019-05-30 | 2019-05-30 | Panel waterproof covering structure for ultrahigh panel dam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910465254.3A CN110185000B (en) | 2019-05-30 | 2019-05-30 | Panel waterproof covering structure for ultrahigh panel dam |
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| CN110185000A CN110185000A (en) | 2019-08-30 |
| CN110185000B true CN110185000B (en) | 2020-09-15 |
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| CN101074355B (en) * | 2006-05-17 | 2013-03-27 | 苏笮斌 | Cement-based penetrant crystalline waterproof material and production thereof |
| CN106626597A (en) * | 2016-12-05 | 2017-05-10 | 张维满 | Pressure-resistant fireproof plate and manufacturing method thereof |
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Effective date of registration: 20200821 Address after: The North Qingyang District of Chengdu City, Sichuan Province, No. 1 610072 Applicant after: China Power Construction Group Chengdu Survey and Design Research Institute Co.,Ltd. Address before: 443002 No. 54 Dongshan Avenue, Xiling District, Hubei, Yichang Applicant before: CHINA GEZHOUBA GROUP FIRST ENGINEERING Co.,Ltd. Applicant before: China Power Construction Group Chengdu Survey and Design Research Institute Co.,Ltd. Applicant before: GUODIAN DADU RIVER HOUZIYAN HYDROPOWER CONSTRUCTION Co.,Ltd. |
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