CN111236155A - Seepage-proofing drainage plugging system for pumped storage power station and construction method thereof - Google Patents
Seepage-proofing drainage plugging system for pumped storage power station and construction method thereof Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
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- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
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Abstract
The invention relates to the field of hydropower station seepage-proofing treatment, in particular to an upper reservoir seepage-proofing drainage plugging system of a pumped storage power station and a construction method thereof, wherein the drainage plugging system comprises a groove body which is arranged in an area with the seepage quantity of less than 5L/d on a dam body, a plugging layer is filled in the groove body, and a mortar layer is arranged on the upper surfaces of the groove body and the plugging layer; the drainage plugging system further comprises an anti-seepage hole arranged in an area, with the water seepage amount not less than 5L/d, of the dam body, the direction of the opening end of the anti-seepage hole is in the down-slope direction, a drain pipe is arranged in the anti-seepage hole, a one-way check valve is arranged at the upper end of the part, extending out of the anti-seepage hole, of the drain pipe, and a primer layer, an epoxy mortar layer and a polyurea layer are sequentially arranged on the periphery of the outer side of the anti-seepage hole. The construction method comprises the steps of water seepage amount inspection, plugging and drainage guiding, the drainage guiding and plugging system is ingenious in design and reasonable in structure, seepage prevention is carried out in a reverse water pressure water seepage area in a plugging or drainage guiding mode according to the water seepage amount, the seepage prevention effect is good, construction operation is convenient, and practicability is high.
Description
Technical Field
The invention relates to the field of hydropower station seepage-proofing treatment, in particular to an upper reservoir seepage-proofing drainage plugging system of a pumped storage power station and a construction method thereof.
Background
China's hydropower resources are vigorously developed and utilized in the past decades, and a large number of conventional hydropower stations and pumped storage power stations are built, such as three gorges hydropower stations, pueraria dam hydropower stations, official land hydropower stations, brocade hydropower stations, Huizhou pumped storage power stations, thirteen-tombs pumped storage power stations and the like. However, with the increase of the operation life of the hydropower station, many reservoir dams have leakage, cracks and other dangerous situations, so that the reservoir dams become dangerous reservoir dams, the effective exertion of the comprehensive functions of the reservoir dams is influenced, and the downstream safety is threatened. In order to ensure the stability and safety of the whole structure of the reservoir, the seepage-proofing reinforcing treatment of the reservoir dam is made, which is very important, so that the seepage-proofing reinforcing treatment needs to be carried out on the reservoir dam. At present, the construction, operation and maintenance of pumped storage power stations in China are in peak periods, inspection and maintenance are needed to be carried out on warehouse basins, retaining dams and galleries every 1-2 years, and the phenomenon of leakage in different degrees in the warehouse basins or the galleries can be found in the annual overhaul period. Once the similar problems occur, the seepage-proofing treatment needs to be carried out in time, and along with the continuous improvement of the construction technical level, the seepage-proofing reinforcing technology of the reservoir dam is increasingly diversified. From the case of the seepage-proofing treatment engineering of hydropower stations at home and abroad, the seepage-proofing forms of reservoir dams are mainly divided into 3 types, namely a vertical seepage-proofing form, a surface seepage-proofing form and a comprehensive seepage-proofing form combining two or more than two types, and a specific seepage-proofing treatment form is selected in a targeted manner according to the specific seepage condition of the reservoir dams so as to achieve the aim of seepage-proofing reinforcement.
Taking a Nanyang Huailong pumped storage power station as an example, the traditional modified asphalt mastic and polymer mortar seepage prevention system is adopted in the early-stage seepage prevention treatment, but the south yang Huailong upper reservoir runs for 8 years, so that the seepage prevention service life is short, the construction is inconvenient, and the water cleanliness is greatly influenced. Chinese patent (patent application No. 201910006324.9) discloses a method for preventing seepage of pumped storage power station, which comprises coating an interface agent on the surface of a reinforced concrete panel and the surface of a sprayed concrete panel, and spraying a two-component polyurea coating after the interface agent is cured, but the method can achieve a certain anti-seepage effect, but if water in a mountain body cannot be discharged in time in a reverse water pressure seepage area, the polyurea coating can fall off due to the fact that water in the dam body cannot be discharged due to rain after the reservoir is operated with water, so that the effective and timely discharge of the water in the dam body is a necessary means for ensuring the service life of the anti-seepage coating of the dam body to be prolonged.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an upper reservoir seepage-proofing drainage plugging system of a pumped storage power station and a construction method thereof.
The invention is realized by adopting the following measures: a pumped storage power station dam body warehouse entry plugging system comprises an entry plugging system, wherein the entry plugging system comprises a groove body arranged in an area with the water seepage amount less than 5L/d on a dam body, a plugging layer is filled in the groove body, the volume of the plugging layer is matched with the space in the groove body, the upper surface of the groove body and the upper surface of the plugging layer are in the same plane, and mortar layers are arranged on the upper surfaces of the groove body and the plugging layer; the drainage plugging system further comprises an anti-seepage hole arranged in an area with the seepage quantity not less than 5L/d on the dam body, the direction of the opening end of the anti-seepage hole is the down-slope direction, a drain pipe is arranged in the anti-seepage hole, drain holes are uniformly formed in the wall, extending into the anti-seepage hole, of the drain pipe, filter layers are arranged on the periphery of the drain holes and the opening end, extending into the anti-seepage hole, of the drain pipe, one-way check valves are arranged at openings of the upper ends of the portions, extending out of the anti-seepage hole, of the drain pipe, and a primer layer, an epoxy mortar layer and a polyurea layer are sequentially arranged on the.
Preferably, the diameter of the drain pipe is matched with the anti-seepage hole, the thickness of the epoxy mortar layer arranged around the anti-seepage hole is 2.5-3.5cm, and the thickness of the polyurea layer is 1.5-2.5 mm.
Preferably, the opening of the anti-seepage hole is a conical hole, the height of the conical hole is 5-10mm, a high-strength mortar layer is filled in the part, located on the periphery of the drain pipe, in the conical hole, and the upper surface of the high-strength mortar layer and the upper surface of the periphery of the conical hole are in the same plane.
Preferably, the depth of the anti-seepage hole is 1-1.5 m, and the length of the drain pipe extending out of the anti-seepage hole is 10-20 cm.
Preferably, the drain holes are distributed in the range of 0-50cm at the lower end of the drain pipe, the distance between every two adjacent drain holes is 5mm, and the diameter of each drain hole is 3-6 mm.
Preferably, the filter layer is made of geotextile, the periphery of the drain hole and the geotextile at the opening end of the drain pipe extending into the anti-seepage hole are integrated, and the upper end of the geotextile is trapped outside the drain pipe through the rope body.
A construction method of an anti-seepage drainage plugging system of a dam body of a pumped storage power station comprises the following steps:
(1) and (4) checking the water seepage amount: checking the water seepage amount of a water seepage area on the dam body, and marking an area with the water seepage amount being less than 5L/d and an area with the water seepage amount being not less than 5L/d;
(2) plugging: chiseling the area with the water seepage amount of less than 5L/d, filling a plugging agent into the groove body after chiseling for plugging, enabling the upper surface of the groove body and the upper surface of the plugging agent to be positioned on the same horizontal plane, and scraping an epoxy mortar layer or an epoxy putty layer around the groove body;
(3) leading and discharging: drilling an anti-seepage hole with the depth of 1-1.5 m in an area with the water seepage amount not less than 5L/d, wherein the opening end of the anti-seepage hole is an inverted cone-shaped hole, a drain pipe is arranged in the anti-seepage hole, the length of the drain pipe extending out of the anti-seepage hole is 10-20cm, the circumference of the lower end of the drain pipe is provided with a drain hole, geotextile is wrapped at the bottom of the drain pipe and the outer side of the drain hole for filtering, a rotary opening type one-way check valve is arranged at the pipe orifice of the drain pipe, high-strength mortar is filled in a gap between the inverted cone-shaped hole and the drain pipe, the surface of the anti-seepage hole and a surrounding dam body are in the same plane, a primer layer is coated around the anti-seepage hole, an epoxy mortar layer with the thickness of 2.5-3.5cm is coated at.
Preferably, in the step (3), the depth of the anti-seepage hole is 1.2 meters, the length of the drain pipe is 1 meter, and the lower end of the drain pipe extends into the anti-seepage hole by 80 cm.
Preferably, in the step (3), the drain holes are distributed in the range of 0-50cm at the lower end of the drain pipe, the distance between every two adjacent drain holes is 5mm, the diameter of each drain hole is 3-6mm, the periphery of each drain hole and the geotextile at the opening end of the drain pipe extending into the anti-seepage hole are integrated, and the upper end of the geotextile is tied outside the drain pipe through the rope body.
Preferably, in the step (3), the thickness of the primer layer is 1-3mm, an epoxy mortar layer with the thickness of 3cm is coated on the upper end of the primer layer in a scraping manner, and a polyurea layer with the thickness of 2mm is sprayed on the upper end of the epoxy mortar layer.
The invention has the beneficial effects that: the invention discloses an anti-seepage drainage plugging system for a pumped storage power station and a construction method thereof, the drainage plugging system has smart design and reasonable structure, adopts plugging or drainage mode to perform anti-seepage treatment in the reverse water pressure seepage area according to the seepage quantity, adopting a slotting plugging mode to prevent seepage in an area with small water seepage amount, adopting anti-seepage holes to drill in an area with large water seepage amount, installing a drain pipe, set up the wash port bottom the drain pipe, the wash port outside sets up the filter layer, avoids the internal impurity of mountain to get into the drain pipe and blocks up the body, and the tip that the drain pipe stretches out anti-seepage hole sets up one-way check valve, avoids rivers in the storehouse basin to go into the mountain, and the exit end direction of drain pipe is down along with the rivers, and the internal rivers of mountain of being convenient for go out, blade coating epoxy mortar and polyurea layer around the anti-seepage hole, make the prevention of seepage effect better, avoid polyurea layer to come to nothing simultaneously, and the practicality is strong.
Drawings
FIG. 1 is a schematic diagram of a cross-sectional structure of a block in an area with a water seepage amount less than 5L/D.
FIG. 2 is a schematic cross-sectional view of drainage construction in an area with water permeability of not less than 5L/D.
Fig. 3 is a front view of the drain pipe.
In the figure: 1-dam body, 2-groove body, 3-blocking layer, 4-mortar layer, 5-anti-seepage hole, 6-drainage pipe, 7-drainage hole, 8-one-way check valve, 9-taper hole, 10-high-strength mortar layer, 11-primer layer, 12-epoxy mortar layer, 13-polyurea layer and 14-filtering layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b): an anti-seepage drainage plugging system for an upper reservoir of a pumped storage power station comprises a drainage plugging system, wherein mountain bodies around an upper reservoir basin of the pumped storage power station have serious fracture zones, and mountain body water is gathered into the defect positions of the reservoir basin, such as emptying and the like along the fracture zones. When the water collecting amount of the empty position of the storehouse basin reaches a certain scale, the water pressure of the area is increased, certain reverse water pressure is generated on the impermeable layer of the storehouse basin, and the collected water leaks out along the weak position in the storehouse basin. The number of the leakage points is large, and the leakage points are distributed scattered, so that the number of concrete spraying areas is large. The existence of a large amount of water seepage points leaves hidden danger for later-stage two-component polyurea spraying construction on the one hand, and on the other hand, after reverse water pressure exceeds the bonding strength of the polyurea coating, the polyurea coating can be caused to fall off in a large area, and the service life and the durability of the polyurea coating are influenced.
The invention discloses an upper reservoir seepage-proofing drainage plugging system of a pumped storage power station, which comprises a drainage plugging system as shown in figure 1, wherein the drainage plugging system comprises a groove body 2 arranged in an area with the water seepage amount less than 5L/d on an upper reservoir dam body 1, a plugging layer 3 is filled in the groove body 2, the volume of the plugging layer 3 is matched with the space in the groove body 2, the upper surface of the groove body 2 and the upper surface of the plugging layer 3 are in the same plane, mortar layers 4 are arranged on the upper surfaces of the groove body 2 and the plugging layer 3, the plugging layer 3 is plugged by adopting a plugging agent to avoid the leakage phenomenon, and the mortar layers 4 can fill gaps in order to avoid gaps between the plugging layer 3 and the groove body 2 after plugging. Because the water seepage amount is smaller, the anti-seepage requirement can be met by adopting a plugging mode.
As shown in fig. 2-3, the drainage plugging system further comprises an anti-seepage hole 5 arranged in an area where the water seepage amount is not less than 5L/d on the dam body 1, the direction of the opening end of the anti-seepage hole 5 is a down-slope direction, the acute angle between the anti-seepage hole 5 and the dam surface of the dam body 1 is 30-60 degrees, so that water can rapidly enter the anti-seepage hole 5, a drain pipe 6 is arranged in the anti-seepage hole 5, the depth of the anti-seepage hole 5 is 1-1.5 meters, preferably 1.2 meters, and the length of the drain pipe 6 extending out of the anti-seepage hole 5 is 10-20 cm. The diameter of the drain pipe 6 is matched with that of the anti-seepage hole 5, so that the drain pipe 6 just extends into the anti-seepage hole 5, drain holes 7 are uniformly formed in the wall of the drain pipe 6 extending into the anti-seepage hole 5, the drain holes 7 are distributed in the range of 0-50cm at the lower end of the drain pipe 6, the distance between every two adjacent drain holes 7 is 5mm, the drain holes 7 are uniformly distributed in the circumferential direction of the drain pipe 6, the diameter of each drain hole 7 is 3-6mm, and the drain holes 7 enable water in the dam body 1 to enter the drain pipe 6 through the drain holes 7. The periphery of wash port 7 and the opening end department that drain pipe 6 stretched into in the anti-seepage hole 5 all are provided with filter layer 14, filter layer 14 is geotechnological cloth, the periphery of wash port 7 and the geotechnological cloth formula as an organic whole of opening end department that drain pipe 6 stretched into in the anti-seepage hole 5, the outside of pricking at drain pipe 6 through the rope body is stranded to the upper end of geotechnological cloth, can carry little stone or impurity to flow into together sometimes because of the internal water in mountain, for avoiding wash port 7 and drain pipe 6 to appear blockking up, adopt geotechnological cloth to filter water, make the water impurity that gets into drain pipe 6 less. The opening of the upper end of the part of the drain pipe 6 extending out of the anti-seepage hole 5 is provided with a one-way check valve 8, the one-way check valve 8 is a swing one-way check valve, the check valve is commercially available, and the specific structure of the check valve is not described in detail, the check valve 8 is used for enabling the water in the water discharge pipe 6 to flow into the upper reservoir basin, the water in the reservoir basin cannot reversely flow into the water discharge pipe 6, therefore, water in the mountain is conveniently discharged, the opening of the anti-seepage hole 5 is provided with the conical hole 9, the height of the conical hole 9 is 5-10mm, the high-strength mortar layer 10 is filled at the peripheral part of the drain pipe 6 in the conical hole 9, the high-strength mortar layer 10 can seal a gap between the drain pipe 6 and the anti-seepage hole 5, the drain pipe 6 is prevented from being installed infirm in the anti-seepage hole 5, the drain pipe 6 is prevented from loosening in the anti-seepage hole 5, and the upper surface of the high-strength mortar layer 10 and the upper surface of the periphery of the conical hole 9 are in the same plane. The periphery of the outer side of the anti-seepage hole 5 is sequentially provided with a primer layer 11, an epoxy mortar layer 12 and a polyurea layer 13 from bottom to top. The thickness of the epoxy mortar layer 12 arranged around the anti-seepage hole 5 is 2.5-3.5cm, and the thickness of the polyurea layer 13 is 1.5-2.5 mm. The primer layer 11 enables the bonding force of the base surface of the dam body to be strong, the epoxy mortar layer 12 plays a role in resisting abrasion, the polyurea layer 13 plays a role in seepage prevention, and because water in the mountain body can be timely discharged from the drain pipe 6 under the action of reverse pressure, the phenomenon that the polyurea layer 13 is empty due to the fact that the water in the mountain body cannot be discharged is avoided.
A construction method of an anti-seepage drainage plugging system of a dam body of a pumped storage power station comprises the following steps:
(1) and (4) checking the water seepage amount: checking the water seepage amount of a water seepage area on the dam body, and marking an area with the water seepage amount being less than 5L/d (liter per day) and an area with the water seepage amount being not less than 5L/d;
(2) plugging: and (3) chiseling the area with the water seepage amount of less than 5L/d, filling a plugging agent into the groove body after chiseling for plugging, enabling the upper surface of the groove body and the upper surface of the plugging agent to be positioned on the same horizontal plane, and blade-coating an epoxy mortar layer or an epoxy putty layer around the groove body, so that the water seepage part is plugged well, and the anti-seepage effect is good.
(3) Leading and discharging: and drilling an anti-seepage hole with the depth of 1-1.5 meters, preferably 1.2 meters, in an area with the water seepage quantity of not less than 5L/d, wherein the opening end of the anti-seepage hole is an inverted cone-shaped hole, the direction of the opening end of the anti-seepage hole is a down-slope direction, the acute angle between the anti-seepage hole and the dam face of the dam body is 30-60 degrees, so that water can conveniently and quickly enter the anti-seepage hole, a drain pipe is arranged in the anti-seepage hole, the length of the drain pipe extending out of the anti-seepage hole is 10-20cm, preferably the length of the drain pipe is 1 meter, and the lower end of. The drain pipe is characterized in that drain holes are formed in the periphery of the lower end of the drain pipe, geotextile is wrapped at the bottom of the drain pipe and the outer sides of the drain holes for filtering, the drain holes are distributed in the range of 0-50cm of the lower end of the drain pipe, the distance between every two adjacent drain holes is 5mm, the diameter of each drain hole is 3-6mm, the periphery of each drain hole and the geotextile at the opening end of the drain pipe extending into the anti-seepage hole are integrated, the upper end of the geotextile is trapped outside the drain pipe through a rope body, and the geotextile plays a role in filtering, so that impurities or small stones in. The pipe orifice of the drain pipe is provided with a swing type one-way check valve, when the reverse water pressure is larger, mountain water flows into the reservoir basin from the drain pipe, water in the reservoir basin cannot enter the drain pipe to cause reservoir basin leakage, a gap between the inverted cone-shaped hole and the drain pipe is filled with high-strength mortar, the surface of the anti-seepage hole and a surrounding dam body are in the same plane, a gap between the drain pipe and the anti-seepage hole is avoided, a primer layer is coated around the anti-seepage hole in a rolling mode, the upper end of the primer layer is coated with an epoxy mortar layer with the thickness of 2.5-3.5cm in a scraping mode, and the upper end of the epoxy mortar layer is coated with a polyurea layer with the thickness of 1.5-2.5 mm. The optimal scheme is that the thickness of the primer layer is 1-3mm, an epoxy mortar layer with the thickness of 3cm is coated on the upper end of the primer layer in a scraping mode, and a polyurea layer with the thickness of mm is sprayed on the upper end of the epoxy mortar layer. The primer layer enables the bonding force of the base surface of the dam body to be stronger, the epoxy mortar layer plays a role in resisting abrasion, the polyurea layer plays a role in seepage prevention, and because water in the mountain can be discharged from the drain pipe in time under the action of reverse pressure, the phenomenon that the polyurea layer is hollowed due to the fact that the water in the mountain cannot be discharged is avoided, and therefore the seepage prevention effect is better.
Claims (10)
1. The utility model provides a prevention of seepage drainage plugging system of pumping storage power station warehouse entry which characterized in that: the dam drainage plugging device comprises a drainage plugging system, wherein the drainage plugging system comprises a groove body arranged in an area with the water seepage amount less than 5L/d on a dam body, a plugging layer is filled in the groove body, the volume of the plugging layer is matched with the space in the groove body, the upper surface of the groove body and the upper surface of the plugging layer are in the same plane, and mortar layers are arranged on the upper surfaces of the groove body and the plugging layer; the drainage plugging system further comprises an anti-seepage hole arranged in an area with the seepage quantity not less than 5L/d on the dam body, the direction of the opening end of the anti-seepage hole is the down-slope direction, a drain pipe is arranged in the anti-seepage hole, drain holes are uniformly formed in the wall, extending into the anti-seepage hole, of the drain pipe, filter layers are arranged on the periphery of the drain holes and the opening end, extending into the anti-seepage hole, of the drain pipe, one-way check valves are arranged at openings of the upper ends of the portions, extending out of the anti-seepage hole, of the drain pipe, and a primer layer, an epoxy mortar layer and a polyurea layer are sequentially arranged on the.
2. The seepage-proofing drainage plugging system for the pumped storage power station upper warehouse according to claim 1, characterized in that: the diameter of the drain pipe is matched with the anti-seepage hole, the thickness of the epoxy mortar layer arranged around the anti-seepage hole is 2.5-3.5cm, and the thickness of the polyurea layer is 1.5-2.5 mm.
3. The seepage-proofing drainage plugging system for the pumped storage power station upper warehouse according to claim 1, characterized in that: the opening of the anti-seepage hole is provided with a conical hole, the height of the conical hole is 5-10mm, a high-strength mortar layer is filled in the part, located on the periphery of the drain pipe, in the conical hole, and the upper surface of the high-strength mortar layer and the upper surface of the periphery of the conical hole are in the same plane.
4. The seepage-proofing drainage plugging system for the pumped storage power station upper warehouse according to claim 1, characterized in that: the depth of the anti-seepage hole is 1-1.5 m, and the length of the drain pipe extending out of the anti-seepage hole is 10-20 cm.
5. The seepage-proofing drainage plugging system for the pumped storage power station upper warehouse according to claim 4, characterized in that: the drain holes are distributed in the range of 0-50cm at the lower end of the drain pipe, the distance between every two adjacent drain holes is 5mm, and the diameter of each drain hole is 3-6 mm.
6. The seepage-proofing drainage plugging system for the pumped storage power station upper warehouse according to claim 1, characterized in that: the filter layer is made of geotextile, the periphery of the drain hole and the geotextile at the opening end of the drain pipe extending into the anti-seepage hole are integrated, and the upper end of the geotextile is trapped outside the drain pipe through the rope body.
7. The construction method of the seepage-proofing drainage plugging system for the pumped storage power station upper storeroom according to claim 1 is characterized in that: the method comprises the following steps:
(1) and (4) checking the water seepage amount: checking the water seepage amount of a water seepage area on the dam body, and marking an area with the water seepage amount being less than 5L/d and an area with the water seepage amount being not less than 5L/d;
(2) plugging: chiseling the area with the water seepage amount of less than 5L/d, filling a plugging agent into the groove body after chiseling for plugging, enabling the upper surface of the groove body and the upper surface of the plugging agent to be positioned on the same horizontal plane, and scraping an epoxy mortar layer or an epoxy putty layer around the groove body;
(3) leading and discharging: drilling an anti-seepage hole with the depth of 1-1.5 m in an area with the water seepage amount not less than 5L/d, wherein the opening end of the anti-seepage hole is an inverted cone-shaped hole, a drain pipe is arranged in the anti-seepage hole, the length of the drain pipe extending out of the anti-seepage hole is 10-20cm, the circumference of the lower end of the drain pipe is provided with a drain hole, geotextile is wrapped at the bottom of the drain pipe and the outer side of the drain hole for filtering, a rotary opening type one-way check valve is arranged at the pipe orifice of the drain pipe, high-strength mortar is filled in a gap between the inverted cone-shaped hole and the drain pipe, the surface of the anti-seepage hole and a surrounding dam body are in the same plane, a primer layer is coated around the anti-seepage hole, an epoxy mortar layer with the thickness of 2.5-3.5cm is coated at.
8. The construction method of the seepage-proofing drainage plugging system for the pumped storage power station upper storeroom according to claim 7, wherein the construction method comprises the following steps: in the step (3), the depth of the anti-seepage hole is 1.2 meters, the length of the drain pipe is 1 meter, and the lower end of the drain pipe extends into the anti-seepage hole by 80 cm.
9. The construction method of the seepage-proofing drainage plugging system for the pumped storage power station upper storeroom according to claim 7, wherein the construction method comprises the following steps: in the step (3), the drain holes are distributed in the range of 0-50cm at the lower end of the drain pipe, the distance between every two adjacent drain holes is 5mm, the diameter of each drain hole is 3-6mm, the periphery of each drain hole and the geotextile at the opening end of the drain pipe extending into the anti-seepage hole are integrated, and the upper end of the geotextile is trapped outside the drain pipe through the rope body.
10. The construction method of the seepage-proofing drainage plugging system for the pumped storage power station upper storeroom according to claim 7, wherein the construction method comprises the following steps: and (3) coating an epoxy mortar layer with the thickness of 3cm on the upper end of the primer layer in a scraping way, and spraying a polyurea layer with the thickness of mm on the upper end of the epoxy mortar layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010184799.XA CN111236155A (en) | 2020-03-17 | 2020-03-17 | Seepage-proofing drainage plugging system for pumped storage power station and construction method thereof |
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| CN202010184799.XA CN111236155A (en) | 2020-03-17 | 2020-03-17 | Seepage-proofing drainage plugging system for pumped storage power station and construction method thereof |
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| CN (1) | CN111236155A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115030113A (en) * | 2022-07-12 | 2022-09-09 | 中电建十一局工程有限公司 | Construction method of check valve of underwater flap valve |
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2020
- 2020-03-17 CN CN202010184799.XA patent/CN111236155A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115030113A (en) * | 2022-07-12 | 2022-09-09 | 中电建十一局工程有限公司 | Construction method of check valve of underwater flap valve |
| CN115030113B (en) * | 2022-07-12 | 2024-02-13 | 中电建十一局工程有限公司 | Construction method of underwater flap valve check valve |
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