CN115538382A - Anti-seepage system for the whole upper reservoir of the new pumped storage power station - Google Patents

Abstract

The invention provides a new type of anti-seepage system for the upper reservoir of a pumped storage power station. The system includes: a reservoir basin, a reservoir bank and an anti-seepage structure; the anti-seepage structure includes: geotextile layer, quick-setting rubber asphalt waterproof coating anti-seepage Layer, plinth, another geotextile layer and cover layer; among them, the geotextile layer is laid on the top of the reservoir bank and the reservoir basin, and the top of the geotextile layer is sprayed with an anti-seepage layer of quick-setting rubber asphalt waterproof coating, and the plinth Set above the anti-seepage layer of quick-setting rubber asphalt waterproof coating, spray the anti-seepage layer of quick-setting rubber asphalt waterproof coating on the top of the toe board, and lay another geotextile layer on the anti-seepage layer of quick-setting rubber asphalt waterproof coating above the toe board, cover The heavy layer is covered above the other geotextile layer, and the technical solution of the present application utilizes the combination of multilayer geotextile and multilayer quick-setting rubber asphalt waterproof coating anti-seepage layer, which can play an anti-seepage effect on the entire reservoir.

Description

Anti-seepage system for the whole upper reservoir of the new pumped storage power station

technical field

The invention relates to the technical field of anti-seepage in water conservancy projects, in particular to a novel anti-seepage system for the entire upper reservoir of a pumped storage power station.

Background technique

With the rapid development of my country's economy and society, the number of water conservancy projects is also increasing. Their main functions in actual production and life include hydropower generation, water storage, flood control and drought relief, etc., but the premise of ensuring that water conservancy projects play their own role , the anti-seepage treatment of the project must be done well. The seepage problem of reservoir water conservancy projects will seriously threaten the normal operation of the reservoir, shorten the service life of the project, bring hidden dangers to the overall safety and stability, and even induce accidents, so it is extremely important to take anti-seepage treatment of reservoir water conservancy projects.

At present, the water conservancy projects in most of the reservoirs in our country were built many years ago. Due to the technical means, financial problems and other factors at that time, many water conservancy projects have seepage, which poses a threat to people's lives and properties. Therefore, it is necessary to Implement anti-seepage treatment technology to ensure the stability and reliability of water conservancy projects, give full play to its role, and benefit people.

The existing anti-seepage treatment methods for water conservancy projects are mainly grouting technology and anti-seepage wall technology. The gaps are filled with a layer of plastic waterproof caulking. risk of leakage.

Contents of the invention

The purpose of the present invention is to provide a new type of anti-seepage system for the entire reservoir of the upper reservoir of the pumped storage power station, so as to solve the problem of poor anti-seepage effect and risk of leakage at the connection between the reservoir basin and the reservoir bank of the existing reservoir .

The new anti-seepage system of the upper reservoir of the new pumped storage power station provided by the present invention includes:

Reservoir basin, reservoir bank and anti-seepage structure;

The reservoir basin is built on the bottom of the reservoir, the reservoir bank is built around the reservoir, and the anti-seepage structure is arranged on the reservoir bank and the reservoir basin;

The anti-seepage structure includes: a geotextile layer, a quick-setting rubber asphalt waterproof coating anti-seepage layer, a plinth, another geotextile layer and a heavy cover layer;

The geotextile layer is laid above the reservoir bank and the reservoir basin, the quick-setting rubber asphalt waterproof coating anti-seepage layer is sprayed on the top of the geotextile layer, and the toe board is arranged on the quick-setting rubber asphalt waterproof coating. above the anti-seepage layer of gelled rubber asphalt waterproof coating, and the plinth covers the reservoir bank and the transition area between the reservoir basin and the reservoir bank; the quick-setting rubber asphalt waterproof coating anti-seepage layer is sprayed above the plinth, and the Another geotextile layer is laid on the quick-setting rubber asphalt waterproof coating anti-seepage layer above the toe board, and the covering layer is laid on the top of the other geotextile layer.

Further, the cover layer is covered with gravel fly ash, and the cover layer is located in the transition area between the reservoir bank and the reservoir basin.

Further, a fine stone concrete protective layer is poured above the quick-setting rubber asphalt waterproof coating anti-seepage layer on the storage basin, and the fine stone concrete protective layer is located in the area between the toe boards.

Further, the reservoir bank includes a foundation layer, a cushion layer area and a transition layer;

The base layer is formed by rolling a layer of asphalt combined with a layer of sand and gravel, and then laying a layer of asphalt and a layer of sand and gravel, and the base layer is located below the geotextile layer on the bank of the reservoir;

The cushion layer area is laid under the base layer, and the cushion layer area is paved with stones with a maximum outer diameter less than or equal to 80mm;

The transition layer is laid under the cushion area, and the transition layer is made of stones with a maximum outer diameter less than or equal to 300mm.

Further, the bank of the reservoir is divided into the bank of the main rockfill area or the bank of the mountain rock mass area according to the different terrain of the construction location;

The bank of the main rock-fill area is built on a flat terrain. The base of the bank in the main rock-fill area is a rock-fill layer, and the rock-fill layer is formed by stacking stones with a maximum outer diameter less than or equal to 800 mm. The transition layer is located above the rockfill layer.

Further, the reservoir bank in the mountain rock mass region is built on the side of the mountain body, and the reservoir bank in the mountain rock mass region is laid with a concrete layer, a sand layer and a gravel layer sequentially from bottom to top on the side wall of the mountain body, and the transition layer located above the gravel layer.

Further, the sand layer is composed of particles with a particle size of 0.2-2mm.

Further, the crushed stone layer is composed of crushed stones with a diameter of 2-20mm.

Further, the bottom of the storage basin is provided with a grouting curtain, and the grouting curtain is formed by perforating and grouting around the storage basin.

Adopt above-mentioned technical scheme, compared with prior art, the beneficial effect of the present invention is:

In the technical solution of the present application, the anti-seepage structure includes: a geotextile layer, a quick-setting rubber asphalt waterproof coating anti-seepage layer, a plinth, another geotextile layer and a heavy cover layer;

Wherein, the geotextile layer is laid on the top of the reservoir bank and the reservoir basin, the top of the geotextile layer is sprayed with an anti-seepage layer of quick-setting rubber asphalt waterproof coating, and the toe plate is arranged above the anti-seepage layer of quick-setting rubber asphalt waterproof coating, And the toe board covers the reservoir bank and the transition area between the reservoir basin and the reservoir bank; the quick-setting rubber asphalt waterproof coating anti-seepage layer is sprayed on the top of the toe board, and another geotextile layer is laid on the quick-setting rubber asphalt waterproof coating above the toe board. On the seepage layer, the heavy cover layer is set on the other geotextile layer. The combination of multi-layer geotextile and multi-layer quick-setting rubber asphalt waterproof coating and anti-seepage layer can play the role of anti-seepage in the whole pool of the reservoir, especially in the transition area between the bank and the bottom of the reservoir. Heavy layers, combined with geotextile and quick-setting rubber asphalt waterproof coating anti-seepage layer between the two, can fully improve the anti-seepage effect in the transition area, and solve the problem of poor anti-seepage effect at the connection between the reservoir basin and the reservoir bank Well, there is the issue of risk of leakage.

In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments of the present invention will be described in detail below together with the accompanying drawings.

Description of drawings

In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the specific implementation or description of the prior art. Obviously, the accompanying drawings in the following description The drawings show some implementations of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

Fig. 1 is the overall structure schematic diagram of the anti-seepage system of the whole reservoir of the upper reservoir of the novel pumped storage power station provided by the present invention;

Figure 2 is a partial enlarged view of A in Figure 1;

Fig. 3 is a partial enlarged view of place B in Fig. 1;

Fig. 4 is a schematic diagram of the reservoir bank structure in the mountain rock mass region of the anti-seepage system of the upper reservoir of the new pumped storage power station provided by the present invention;

Fig. 5 is a schematic diagram of the reservoir bank structure in the main rockfill area of the anti-seepage system of the upper reservoir of the new pumped storage power station provided by the present invention.

In the figure: 11-fine stone concrete protection layer, 12-grouting curtain, 21-reinforced concrete panel, 22-plastic waterproof caulk, 23-base layer, 24-cushion layer area, 25-transition layer, 26-rockfill layer, 27-concrete layer, 28-sand layer, 29-gravel layer, 31-geotextile layer, 32-quick-setting rubber asphalt waterproof coating anti-seepage layer, 33-toe board, 35-another geotextile layer, 36 -Cover heavy layer.

detailed description

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplified descriptions, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the invention.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

The embodiment of the present application provides a new anti-seepage system for the whole reservoir of the upper reservoir of the pumped storage power station, which can fully improve the anti-seepage effect of the whole reservoir of the reservoir.

Specifically, as shown in Figure 1, the anti-seepage system for the entire reservoir of the new pumped storage power station includes: the reservoir basin, the reservoir bank and the anti-seepage structure;

A reservoir basin is built at the bottom of the reservoir, and a reservoir bank is built around the reservoir. The anti-seepage structure is set on the reservoir bank and the reservoir basin to maintain an all-round anti-seepage effect on the reservoir bank and the reservoir basin;

The anti-seepage structure includes: a geotextile layer 31, a quick-setting rubber asphalt waterproof coating anti-seepage layer 32, a plinth 33, another geotextile layer 35 and a heavy cover layer 36;

The geotextile layer 31 is laid on the top of the reservoir bank and the reservoir basin. The top of the geotextile layer 31 is sprayed with an anti-seepage layer 32 of quick-setting rubber asphalt waterproof coating. The toe board 33 is made of reinforced concrete. Above the anti-seepage layer 32 of the rubber asphalt waterproof coating, and the plinth 33 covers the transition area between the bank of the reservoir and the bank of the reservoir basin and the bank of the reservoir;

Another layer of quick-setting rubber asphalt waterproof coating anti-seepage layer 32 is sprayed on the top of the toe board 33, and another geotextile layer 35 is laid on the quick-setting rubber asphalt waterproof coating anti-seepage layer 32 above the toe board 33, and the cover layer 36 Covering is arranged on the top of another geotextile layer 35 .

In the technical solution of the present application, the anti-seepage layer of the quick-setting rubber asphalt waterproof coating can adopt a spraying quick-setting rubber asphalt waterproof coating finish provided in Patent No. 202110082867.6, more specifically, the spraying quick-setting rubber The asphalt waterproof paint finish includes at least: 5-30 parts of pearlescent pigment, 70-200 parts of resin, 1-3 parts of film-forming aid, 0.3-1 part of defoamer, 1-3 parts of thixotropic agent, 1-3 parts Coupling agent, 3-6 parts of dispersant and 1-3 parts of leveling agent.

The use of this waterproof coating topcoat has the following advantages: it can realize the problem of no lap joints, and solve the risk of water channeling caused by lap joints; it can perfectly cover and solve the waterproof problem of special-shaped structures; it can cope with the harsh environment of natural exposure, and has ultra-wide width and high resistance , low temperature, ozone aging resistance; coping with fatigue deformation, with exponential super crack resistance and fatigue resistance. It can cope with ice expansion in winter in exchange of four seasons, and has the advantages of super freeze-thaw resistance and temperature change resistance.

In practical application, there is a large amount of water stored in the reservoir, and the reservoir bank, reservoir basin, and the transition area between the reservoir bank and the reservoir basin are prone to water seepage. In the technical scheme of the present application, another geotextile layer 35 is combined with the quick-setting rubber asphalt waterproof coating anti-seepage layer 32 as the first heavy waterproof structure, which has the functions of anti-seepage and isolation, and the weight of the gravel fly ash cover is 36 for the transition area. Another geotextile layer 35 acts as a fixation.

Considering that the long-term use of the above-mentioned first waterproof structure may cause the deterioration of the anti-seepage effect due to material aging or other factors, in this embodiment, the geotextile layer 31 is combined with the quick-setting rubber asphalt waterproof coating anti-seepage layer 32 on it. And as the second waterproof structure, the waterproof coating has excellent bonding performance with the base surface for the adhesion between the waterproof material and the base surface, so that the anti-seepage layer of the entire quick-setting rubber asphalt waterproof coating is fully adhered to the water-facing surface of the later structure, Completely solve the problem of water channeling between the anti-seepage layer and the structural layer of the quick-setting rubber asphalt waterproof coating. The gap between the geotextile layer 31 and the toe board 33 is fully bonded to prevent water leakage in the gap between the geotextile layer 31 and the contact surface of the toe board 33 . By adopting the above-mentioned double anti-seepage structure, the anti-seepage effect of the reservoir bank, reservoir basin, and transition area of the reservoir is better than the anti-seepage requirements of the reservoir.

In the specific technical solution of the embodiment of the present invention, as shown in Figure 4-5, the reservoir bank and the reservoir basin are all laid with a geotextile layer 31, and the top of the geotextile layer 31 is sprayed with an anti-seepage layer of quick-setting rubber asphalt waterproof coating 32. Since the quick-setting rubber asphalt waterproof coating anti-seepage layer 32 has a good waterproof effect, the combined use of the quick-setting rubber asphalt waterproof coating anti-seepage layer 32 and the geotextile layer 31 meets the anti-seepage requirements of the reservoir bank and the reservoir basin.

In the specific technical solution of the embodiment of the present invention, the plinth 33 needs to be constructed in multiple times on the bank of the reservoir during the actual construction process, so there are several gaps in the plinth 33 formed by multiple constructions, and the gaps are embedded with plastic waterproofing. Seam glue 22 is filled.

In the specific technical solution of the embodiment of the present invention, a fine stone concrete protective layer 11 is poured above the quick-setting rubber asphalt waterproof coating anti-seepage layer 32 on the reservoir basin, and the fine stone concrete protective layer is located in the area between the toe boards.

The fine stone concrete protective layer 11 protects the quick-setting rubber asphalt waterproof coating anti-seepage layer 32 and the geotextile layer 31 of the reservoir basin, thereby ensuring an excellent anti-seepage effect.

In the specific technical solution of the embodiment of the present invention, as shown in Figures 4-5, the reinforced concrete panel 21 is located between the lowest sinking water level 41 of the reservoir bank and the anti-seepage structure, and the surface is sprayed with quick-setting rubber asphalt waterproofing Paint anti-seepage layer 32.

In the specific technical solution of the embodiment of the present invention, the bank of the reservoir includes a base layer 23, a cushion layer area 24 and a transition layer 25;

The base layer 23 is formed by rolling a layer of asphalt and a layer of sand and then laying a layer of asphalt and a layer of sand and rolling, and the base layer 23 is laid below the geotextile layer 31 on the bank of the reservoir;

The cushion area 24 is laid under the foundation layer 23, and the cushion area 24 is formed by laying stones with a maximum outer diameter less than or equal to 80mm;

The transition layer 25 is laid under the cushion area 24, and the transition layer 25 is laid by stones with a maximum outer diameter less than or equal to 300mm.

Specifically, the asphalt can be used as an oily adhesive after being heated. After the asphalt is heated, a layer of gravel is laid on it, and then the gravel is rolled into the asphalt to form a whole, and then a layer of asphalt and a layer of gravel are laid. Roll again to form the base layer 23. The base layer 23 is simpler, more economical, more efficient and safer than the conventional roller compacted mortar slope protection construction, and avoids structural defects such as panel cracks that are easily caused by the conventional roller compacted mortar slope protection construction.

Anti-filter materials are mixed in the cushion area 24 to prevent the loss of coarse and fine particles in the bank of the reservoir. The function of the cushion layer area 24 is to prevent unfavorable seepage deformation such as piping and flowing soil on the bank of the reservoir.

The cushion area 24 has poor adhesion and has the risk of falling off. The outer diameter of the stone material used in the transition layer 25 is greater than that of the cushion layer area 24, which can allow the cushion layer area 24 to adhere firmly and make the bank of the reservoir more firm.

In the specific technical solution of the embodiment of the present invention, as shown in Figure 5, the bank of the reservoir can be divided into the bank of the main rockfill area or the bank of the mountain rock mass area according to the different terrain of the construction location;

The bank of the main rock-fill area is built on a flat terrain. The base of the bank in the main rock-fill area is the rock-fill layer 26, and the rock-fill layer 26 is piled up with stones with a maximum outer diameter of 800mm or less.

The rockfill layer 26 is the reservoir bank of the main rockfill area, and mainly bears the water-retaining pressure and thrust of relatively large-sized rocks, which also contains some fine materials, so that the rockfill layer 26 is compacted. The rockfill layer 26 makes the bank of the reservoir more firm.

In the specific technical solution of the embodiment of the present invention, as shown in Figure 4, the bank of the mountain rock area is built on the side of the mountain, and the bank of the mountain rock area is successively laid with a concrete layer 27 and a sand layer 28 on the side wall of the mountain. and gravel layer 29.

The concrete layer 27 has a reinforcement effect on the surface of the mountain rock mass, preventing the surface of the mountain rock mass from falling off, which affects the safety of the bank of the mountain rock mass area. The base layer plays an isolation role on the mountain body, and at the same time increases the adhesion of the mountain body to the transition layer 25, making the bank of the reservoir in the rock mass region of the mountain body stronger.

In the specific technical solution of the embodiment of the present invention, the reservoir basin is provided with a grouting curtain 12, and the grouting curtain 12 is formed by perforating and grouting around the bottom of the reservoir basin.

The grouting curtain 12 is to pour grout into the cracks and gaps of the rock mass or soil layer to form a continuous water-blocking curtain.

Specifically, the drilling and grouting of the grouting curtain 12 is gradually densified according to the order arranged in the design. For curtains with two or more rows of holes, most of them first drill and irrigate the downstream row, then drill and irrigate the upstream row, and finally drill and irrigate the middle row. It has the function of reducing seepage volume and osmotic pressure.

Finally, it should be noted that each embodiment in this specification is described in a progressive manner, each embodiment focuses on the differences from other embodiments, and the same and similar parts of each embodiment refer to each other That is; the above embodiments are only used to illustrate the technical scheme of the present invention, rather than limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it still can The technical solutions described in the foregoing embodiments are modified, or some or all of the technical features are equivalently replaced; in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. However, these modifications, substitutions or combinations do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (9)

1. The utility model provides a novel upper reservoir full storehouse anti-seepage system of pumped storage power station which characterized in that includes: a reservoir basin, a reservoir bank and an anti-seepage structure;

the reservoir basin is built at the bottom of the reservoir, reservoir banks are built around the reservoir, and the seepage-proofing structure is arranged on the reservoir banks and the reservoir basin;

the barrier structure includes: the waterproof coating comprises a geotextile layer, a rapid-hardening rubber asphalt waterproof coating impervious layer, toe boards and a cover weight layer;

the geotextile layer is laid above the reservoir bank and the reservoir basin, the rapid-hardening rubber asphalt waterproof coating impervious layer is sprayed above the geotextile layer, the toe board is arranged above the rapid-hardening rubber asphalt waterproof coating impervious layer, and the toe board covers the reservoir bank and a transition region between the reservoir basin and the reservoir bank; toe board top spraying rapid hardening rubber asphalt waterproofing paint barrier layer, another geotechnological cloth layer lay in the toe board top on the rapid hardening rubber asphalt waterproofing paint barrier layer, another geotechnological cloth layer top is located to the lid heavy layer lid.

2. The novel pumped storage power station upper reservoir whole reservoir seepage prevention system as claimed in claim 1, wherein the weight covering layer is made of stone slag and fly ash and is located in a transition region between the reservoir bank and the reservoir basin.

3. The novel pumped storage power station upper reservoir whole reservoir seepage prevention system as claimed in claim 2, wherein a fine aggregate concrete protective layer is poured on the reservoir basin above the rapid hardening rubber asphalt waterproof coating seepage prevention layer, and the fine aggregate concrete protective layer is located in the area between the toe boards.

4. The novel pumped storage power station upper reservoir full bay seepage prevention system of claim 1, wherein said reservoir bank comprises a base layer, a bedding layer region and a transition layer;

the foundation layer is formed by combining a layer of asphalt with a layer of gravel and then laying a layer of asphalt and a layer of gravel again, and is positioned below the geotechnical cloth layer on the bank of the reservoir;

the cushion area is laid below the base layer and is formed by laying stones with the maximum outer diameter of less than or equal to 80 mm;

the transition layer is paved below the bedding layer region and is paved by stones with the maximum outer diameter of less than or equal to 300 mm.

5. The novel upper reservoir whole-reservoir seepage-proofing system of the pumped storage power station as claimed in claim 4, wherein the reservoir bank is divided into a main rockfill area bank or a mountain rock mass area bank according to the difference of construction position landform;

the regional bank of main rockfill is built in the position that the topography is flat, the basic unit on the regional bank of main rockfill is the rockfill layer, the rockfill layer is piled by the stone that the biggest external diameter is less than and is equal to 800mm and builds and form, the transition level is in the top on rockfill layer.

6. The novel pumped storage power station upper reservoir whole warehouse seepage prevention system as claimed in claim 4, wherein the mountain rock mass area bank is built on the side face of the mountain, a concrete layer, a sand layer and a gravel layer are sequentially laid on the side wall of the mountain from bottom to top, and the transition layer is positioned above the gravel layer.

7. The novel pumped storage power station upper reservoir full bay seepage prevention system of claim 6, wherein said sand layer is comprised of particles having a particle size of 0.2-2 mm.

8. The novel pumped storage power station upper reservoir whole reservoir seepage prevention system as claimed in claim 6, wherein the gravel layer is composed of gravel blocks with a diameter of 2-20 mm.

9. The novel pumped storage power station upper reservoir whole reservoir seepage prevention system as claimed in claim 1, wherein a grouting curtain is arranged at the bottom of the reservoir basin, and the grouting curtain is formed by punching and grouting the periphery of the reservoir basin.

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