Daily regulation reservoir bank slope structure of pumped storage power station

Abstract

The utility model discloses a daily regulation reservoir bank slope structure of a pumped storage power station, and relates to the technical field of reservoir slope construction. The slope toe unit structure comprises a slope toe unit, a concrete retaining wall, a first foam light soil layer and a second foam light soil layer, the slope toe unit is located at the slope toe of the reservoir side slope, the concrete retaining wall is located in the middle of the reservoir side slope and makes contact with the water surface, and the first foam light soil layer is located behind the concrete retaining wall. The comprehensive treatment mode of the concrete retaining wall, the foam light soil, the grouted rubble slope protection and the slope toe unit is adopted, the operation characteristics of the pumped storage power station are fully considered, the physical performance of materials is exerted, the influence of frequent change of reservoir water level on the reservoir bank slope of the daily regulation reservoir on side slope scouring is effectively eliminated, meanwhile, the construction efficiency is improved, and the construction cost is reduced. The construction cost is reduced, and the problems that the construction of the existing daily regulation reservoir bank slope is influenced by the amplitude variation of the water level, and the construction difficulty and the construction cost are high are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of reservoir slope construction, in particular to a reservoir bank slope structure for a daily regulation reservoir in a pumped storage power station. Background Art

[0002] Engineering slope repair technology has been widely used in many industries such as highway, municipal administration, construction, and water conservancy. However, in previous engineering projects and technical research, there has been no special research on the repair technology of typical reservoir bank slopes with large water level fluctuations and frequent reservoir scheduling, such as pumped storage. Therefore, in such reservoir bank slope repair or reinforcement projects, traditional slope repair solutions and technologies are often selected first, without considering the operating characteristics of the pumped storage power station reservoir, which increases the construction difficulty and cost.

[0003] As a daily regulating reservoir, the pumped storage power station can adjust the water level by more than ten meters every day. Therefore, the collapse of the reservoir bank slope is mainly caused by the repeated scouring and hollowing of the slope foot by the change of reservoir water level, resulting in the instability of the base. Due to its engineering characteristics, the repair of the reservoir bank slope is more difficult. Traditional solutions for repairing the reservoir bank slope mostly use concrete retaining walls with anchor rods, frame beams, etc., which are expensive, difficult to construct, and have a long engineering period.

[0004] To this end, we provide a pumped storage power station daily regulation reservoir bank slope structure to solve the above-mentioned problems. Utility Model Content

[0005] The utility model aims to provide a bank slope structure of a daily regulating reservoir of a pumped storage power station, which adopts a comprehensive management method of concrete retaining walls, foam lightweight soil, mortar-laid stone slope protection and slope foot units, fully considers the operating characteristics of the pumped storage power station, gives full play to the physical properties of the materials, and effectively eliminates the influence of frequent changes in the reservoir water level on the bank slope of the daily regulating reservoir. The slope is scoured, while the construction efficiency is increased and the construction cost is reduced, solving the problem that the existing bank slope construction of the daily regulating reservoir is affected by the water level fluctuation, and the construction difficulty and construction cost are relatively large.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model is a bank slope structure of a daily regulation reservoir of a pumped storage power station, comprising a slope foot unit, a concrete retaining wall, a first foam lightweight soil layer and a second foam lightweight soil layer; the slope foot unit is located at the slope foot of the reservoir, the concrete retaining wall is located in the middle of the reservoir slope and in contact with the water surface, the first foam lightweight soil layer is located behind the concrete retaining wall, the second foam lightweight soil layer is located at the upper part of the reservoir slope and above the side of the first foam lightweight soil layer; the slope foot unit, the concrete retaining wall and the second foam lightweight soil layer are distributed in a stepped manner.

[0008] The slope foot unit includes pine piles, wire mesh and riprap layer; the pine piles are inserted into the slope soil, the wire mesh is hung on the top of the pine piles, stone cages are filled between the pine piles, and riprap treatment is used to form the riprap layer.

[0009] The utility model is further configured that the pine wood piles have a horizontal row spacing of 1.2 meters, a vertical row spacing of 1 meter, and an insertion depth of not less than 1 / 2 of the pile body length.

[0010] The utility model is further configured that the stone particle size of the riprap layer is 70-250mm, and the porosity is not greater than 24%.

[0011] The utility model is further configured such that the concrete retaining wall is cast on the top of a concrete base, the concrete base is cast on the top of a first crushed stone cushion layer, and the first crushed stone cushion layer is laid on a stepped surface of the slope soil.

[0012] The utility model is further configured that a mortar-laid stone slope protection is built on the lower end of one side of the concrete retaining wall close to the water surface; the bottom of the mortar-laid stone slope protection is fixedly connected to the top of the concrete base, and the lower end of the mortar-laid stone slope protection is fixedly connected to the upper end of the slope foot unit.

[0013] The utility model is further configured such that the first foam lightweight soil layer is poured on top of the backfill gravel layer and is fixedly connected to the concrete retaining wall, and the backfill gravel layer is laid on top of the first gravel cushion layer.

[0014] The utility model is further configured such that a second crushed stone cushion layer is laid on the top of the first foam lightweight soil layer; the top surface of the second crushed stone cushion layer is flush with the top surface of the concrete retaining wall, and a first concrete top plate is cast on the top surfaces of the two.

[0015] The utility model is further configured such that the second foam lightweight soil layer is cast at the top rear end of the first concrete top plate; a panel is fixed on the side of the second foam lightweight soil layer close to the water surface, a third crushed stone cushion layer is laid on the top of the second foam lightweight soil layer, a second concrete top plate and a concrete top beam are cast on the top of the third crushed stone cushion layer, and the concrete top beam is located in front of the second concrete top plate; an asphalt layer is cast on the top of the second concrete top plate.

[0016] The utility model has the following beneficial effects:

[0017] 1. The utility model adopts a slope foot unit at the bottom of the slope to stabilize the slope foot, and adopts a concrete retaining wall and a mortar-stone slope protection structure in the middle of the slope, which is located in an area that may be submerged during water level regulation and change. It has sufficient stability and strength, can effectively protect and eliminate slope scouring caused by water level fluctuations, and adopts a first foam lightweight soil layer and a second foam lightweight soil layer for filling on the upper part of the slope. Under the premise of avoiding long-term immersion in reservoir water, the lightweight soil has the excellent characteristics of light weight, fast construction, heat insulation and shock absorption, and strong pressure resistance. This regional and multi-level comprehensive repair technology for reservoir bank slopes fully considers the operating characteristics of pumped storage power stations, gives full play to the physical properties of materials, effectively eliminates the impact of frequent changes in reservoir water level on slope scouring of the daily regulation reservoir bank slope, and at the same time increases construction efficiency and reduces construction costs. Compared with the traditional concrete retaining wall repair method, it can reduce costs by more than 50%.

[0018] 2. The slope foot unit of the utility model is composed of pine piles, wire mesh, gabions and riprap, which have better stability when combined with each other, are not restricted by the water level of the reservoir, can be constructed underwater to a certain extent, and are more convenient to construct. The multi-layer crushed stone structure of the first crushed stone cushion layer, the backfill crushed stone layer, the second crushed stone cushion layer and the third crushed stone cushion layer can effectively enhance the stability of the ground, prevent ground deformation and loosening, reduce the risk of accidental collapse of the foundation, effectively prevent soil and water loss and soil erosion, reduce environmental risks, improve the bearing capacity of the foundation, and reduce settlement.

[0019] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a schematic diagram of the overall structural section of a daily regulation reservoir bank slope structure of a pumped storage power station.

[0022] Figure 2 The present invention is a schematic diagram of the construction process structure of the slope foot unit of the daily regulation reservoir bank slope structure of a pumped storage power station.

[0023] Figure 3 A schematic diagram of the construction process of a concrete retaining wall for a daily regulation reservoir bank slope structure of a pumped storage power station Figure 1 .

[0024] Figure 4A schematic diagram of the construction process of a concrete retaining wall for a daily regulation reservoir bank slope structure of a pumped storage power station Figure 2 .

[0025] Figure 5 The present invention is a schematic diagram of the construction process of the first foamed lightweight soil layer of the bank slope structure of a daily regulation reservoir of a pumped storage power station.

[0026] Figure 6 The present invention is a schematic diagram of the construction process of the second foam lightweight soil layer of the bank slope structure of a daily regulation reservoir of a pumped storage power station.

[0027] Figure 7 This is an enlarged schematic diagram of the top structure of the second foam lightweight soil layer of a daily regulation reservoir bank slope structure of a pumped storage power station.

[0028] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0029] 1-slope foot unit, 101-pine piles, 102-wire mesh, 103-riprap layer, 2-concrete retaining wall, 201-concrete base, 202-first crushed stone cushion layer, 203-mortared stone slope protection, 3-first foam lightweight soil layer, 301-backfill crushed stone layer, 302-second crushed stone cushion layer, 303-first concrete top plate, 4-second foam lightweight soil layer, 401-panel, 402-third crushed stone cushion layer, 403-second concrete top plate, 404-concrete top beam, 405-asphalt layer. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] See also Figure 1 The utility model is a bank slope structure of a daily regulating reservoir of a pumped storage power station, comprising a slope foot unit 1, a concrete retaining wall 2, a first foam lightweight soil layer 3 and a second foam lightweight soil layer 4; the slope foot unit 1 is located at the slope foot of the reservoir, the concrete retaining wall 2 is located in the middle of the reservoir slope and in contact with the water surface, the first foam lightweight soil layer 3 is located behind the concrete retaining wall 2, and the second foam lightweight soil layer 4 is located at the upper part of the reservoir slope and above the side of the first foam lightweight soil layer 3; the slope foot unit 1, the concrete retaining wall 2 and the second foam lightweight soil layer 4 are distributed in a stepped manner.

[0032] Among them Figure 2As shown, the foot of slope unit 1 includes pine piles 101, wire mesh 102 and riprap layer 103; pine piles 101 are inserted into the slope soil, wire mesh 102 is hung on the top of pine piles 101, gabions are thrown between pine piles 101, and riprap is used to form riprap layer 103; the horizontal row spacing of pine piles 101 is 1.2 meters, the vertical row spacing is 1 meter, and the insertion depth is not less than 1 / 2 of the pile body length; the stone particle size of riprap layer 103 is 70-250mm, and the porosity is not more than 24%. The foot of slope unit 1 is composed of pine piles 101, wire mesh 102, gabions and riprap, which have better stability when combined with each other, are not restricted by the water level of the reservoir, can be constructed underwater to a certain extent, and are more convenient to construct.

[0033] Among them Figure 3-4 As shown, the concrete retaining wall 2 is cast on the top of the concrete base 201, the concrete base 201 is cast on the top of the first crushed stone cushion layer 202, and the first crushed stone cushion layer 202 is laid on the stepped surface of the slope soil; the lower end of the concrete retaining wall 2 close to the water surface is built with a mortar-laid stone slope protection 203; the bottom of the mortar-laid stone slope protection 203 is fixedly connected to the top of the concrete base 201, and the lower end of the mortar-laid stone slope protection 203 is fixedly connected to the upper end of the slope foot unit 1. The structure of the concrete retaining wall 2 and the mortar-laid stone slope protection 203 has sufficient stability and strength, and can effectively protect and eliminate slope scour caused by water level fluctuations.

[0034] Among them Figure 5 As shown, the first foam lightweight soil layer 3 is cast on the top of the backfill gravel layer 301 and is fixedly connected to the concrete retaining wall 2; the backfill gravel layer 301 is laid on the top of the first gravel cushion layer 202; the second gravel cushion layer 302 is laid on the top of the first foam lightweight soil layer 3; the top surface of the second gravel cushion layer 302 is flush with the top surface of the concrete retaining wall 2, and the first concrete top plate 303 is cast on the top surfaces of the two.

[0035] Among them Figure 6-7 As shown, the second foamed lightweight soil layer 4 is cast at the top rear end of the first concrete top plate 303; a panel 401 is fixed on the side of the second foamed lightweight soil layer 4 close to the water surface, a third crushed stone cushion layer 402 is laid on the top of the second foamed lightweight soil layer 4, a second concrete top plate 403 and a concrete top beam 404 are cast on the top of the third crushed stone cushion layer 402, and the concrete top beam 404 is located in front of the second concrete top plate 403; an asphalt layer 405 is cast on the top of the second concrete top plate 403. The first foamed lightweight soil layer 3 and the second foamed lightweight soil layer 4 are used for filling, and the excellent characteristics of lightweight soil such as light weight, fast construction, heat insulation and shock absorption, and strong pressure resistance are brought into play under the premise of avoiding long-term immersion in reservoir water.

[0036] The multi-layer crushed stone structure including the first crushed stone cushion layer 202, the backfill crushed stone layer 301, the second crushed stone cushion layer 302 and the third crushed stone cushion layer 402 can effectively enhance the stability of the ground, prevent ground deformation and loosening, reduce the risk of accidental foundation collapse, effectively prevent soil erosion and soil loss, reduce environmental risks, improve the bearing capacity of the foundation, and reduce settlement.

[0037] The construction process of the reservoir bank slope structure is as follows:

[0038] S1: Pine wood piles 101 are driven at the foot of the slope, and then a wire mesh 102 is hung on the top of the pine wood piles 101, multiple gabions are thrown into the gabions between the pine wood piles 101, and then stones are thrown into the wire mesh 102 to form a riprap layer 103;

[0039] S2: laying a first crushed stone cushion layer 202 on the step surface of the slope soil, pouring a concrete base 201 on the first crushed stone cushion layer 202, pouring a concrete retaining wall 2 on the concrete base 201, and finally building a mortar stone slope protection 203 at the lower end of the side of the concrete retaining wall 2;

[0040] S3: backfilling gravel behind the concrete retaining wall 2 to form a backfill gravel layer 301, and pouring a first foamed lightweight soil layer 3 on the backfill gravel layer 301;

[0041] S4: laying a second crushed stone cushion layer 302 on the first foam lightweight soil layer 3, and casting a first concrete top plate 303 on the top of the second crushed stone cushion layer 302 and the top of the concrete retaining wall 2;

[0042] S5: Pour the second foamed lightweight soil layer 4 on the first concrete top plate 303, install the panel 401 on the side of the second foamed lightweight soil layer 4 close to the water surface, lay the third crushed stone cushion layer 402 on the top of the second foamed lightweight soil layer 4, pour the second concrete top plate 403 and the concrete top beam 404 on the third crushed stone cushion layer 402, pour the asphalt layer 405 on the second concrete top plate 403, and improve the ancillary facilities around the reservoir bank slope.

[0043] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0044] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A pumped storage power station daily regulation reservoir bank slope structure, comprising a slope foot unit (1), a concrete retaining wall (2), a first foamed lightweight soil layer (3) and a second foamed lightweight soil layer (4); characterized in that: The foot unit (1) is located at the foot of the reservoir slope, the concrete retaining wall (2) is located in the middle of the reservoir slope and in contact with the water surface, the first foam lightweight soil layer (3) is located behind the concrete retaining wall (2), and the second foam lightweight soil layer (4) is located at the upper part of the reservoir slope and above the side of the first foam lightweight soil layer (3); The slope foot unit (1), the concrete retaining wall (2) and the second foam lightweight soil layer (4) are distributed in a stepped manner; The slope foot unit (1) comprises pine wood piles (101), a wire mesh (102) and a riprap layer (103); The pine wood piles (101) are inserted into the slope soil, the wire mesh (102) is hung on the top of the pine wood piles (101), gabions are filled between the pine wood piles (101), and riprap treatment is used to form the riprap layer (103).

2. A pumped storage power station daily regulation reservoir bank slope structure according to claim 1, characterized in that: The pine wood piles (101) have a horizontal row spacing of 1.2 meters, a vertical row spacing of 1 meter, and an insertion depth of not less than 1 / 2 of the pile body length.

3. A pumped storage power station daily regulation reservoir bank slope structure according to claim 1, characterized in that: The riprap layer (103) has a stone particle size of 70-250 mm and a porosity of no more than 24%.

4. A pumped storage power station daily regulation reservoir bank slope structure according to claim 1, characterized in that: The concrete retaining wall (2) is cast on the top of a concrete base (201), the concrete base (201) is cast on the top of a first crushed stone cushion layer (202), and the first crushed stone cushion layer (202) is laid on a stepped surface of the slope soil.

5. A pumped storage power station daily regulation reservoir bank slope structure according to claim 4, characterized in that: A mortar-laid stone slope protection (203) is built on the lower end of the concrete retaining wall (2) on the side close to the water surface; The bottom of the mortar-laid stone slope protection (203) is fixedly connected to the top of the concrete base (201), and the lower end of the mortar-laid stone slope protection (203) is fixedly connected to the upper end of the slope foot unit (1).

6. A pumped storage power station daily regulation reservoir bank slope structure according to claim 4, characterized in that: The first foamed lightweight soil layer (3) is poured on top of the backfill gravel layer (301) and is fixedly connected to the concrete retaining wall (2); the backfill gravel layer (301) is laid on top of the first gravel cushion layer (202).

7. A pumped storage power station daily regulation reservoir bank slope structure according to claim 1, characterized in that: A second crushed stone cushion layer (302) is laid on top of the first foam lightweight soil layer (3); The top surface of the second crushed stone cushion layer (302) is flush with the top surface of the concrete retaining wall (2), and a first concrete top plate (303) is cast on the top surfaces of both.

8. A pumped storage power station daily regulation reservoir bank slope structure according to claim 7, characterized in that: The second foamed lightweight soil layer (4) is poured on the top rear end of the first concrete top plate (303); A panel (401) is fixed on the side of the second foamed lightweight soil layer (4) close to the water surface, a third crushed stone cushion layer (402) is laid on the top of the second foamed lightweight soil layer (4), a second concrete top plate (403) and a concrete top beam (404) are cast on the top of the third crushed stone cushion layer (402), and the concrete top beam (404) is located in front of the second concrete top plate (403); An asphalt layer (405) is poured on the top of the second concrete top plate (403).

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