Slope supporting structure of water level variable amplitude area of water inlet and outlet of pumped storage power station

Abstract

The utility model relates to a slope supporting structure of a water level variable amplitude area of a water inlet and a water outlet of a pumped storage power station, which comprises a plurality of drainage holes, a broken stone hardcore, a reinforced concrete fitting slope and a drainage floral tube, one end of each drainage hole extends into a slope, the other end of each drainage hole extends to the slope surface of the slope, a plastic blind ditch pipe is arranged in each drainage hole, and the reinforced concrete fitting slope is arranged in the plastic blind ditch pipe. The plastic blind ditch pipe extends by a preset length in the length direction of the drainage hole. The broken stone hardcore is laid on the slope surface of the side slope, and the reinforced concrete fitting slope is laid on the outer surface of the broken stone hardcore; the drainage floral tube penetrates through the broken stone hardcore and the reinforced concrete fitting slope and is connected with the plastic blind ditch tube, the end, away from the plastic blind ditch tube, of the drainage floral tube is exposed out of the reinforced concrete fitting slope, and the junction of the drainage floral tube and the broken stone hardcore is plugged with an asphalt hemp rope; the slope supporting structure can keep the overall stability of the slope, and the situation of local collapse of the slope is avoided.

Description

Technical Field

[0001] This application relates to the technical field of water conservancy and hydropower, and particularly relates to a slope support structure in the water level variable amplitude area of the intake and outlet of a pumped storage power station. Background Art

[0002] Currently, the main methods of slope support are: shotcrete support (a support structure mainly composed of steel bar anchors, cables, and shotcrete), pile wall support (setting a reinforced concrete pile wall at the toe of the slope), geogrid or lattice beam anchor (using geogrids made of plastic or metal materials, mainly for soil slopes). For the rock slopes of the pumped storage power station with frequently changing water levels, shotcrete support is mainly used. For soil slopes, the stability of the slope in the water level variable amplitude area is ensured mainly by slowing down the slope + surface lattice beam + dry rubble masonry and geotextile filter inside the lattice beam. For the soil slopes in the water level variable amplitude area, it has been found that in the operating power stations, especially in some local areas with large water level variable amplitude and large flow velocity, the collapse of dry rubble masonry and lattice beams occurs frequently. Summary of the Utility Model

[0003] The embodiment of this application provides a slope support structure in the water level variable amplitude area of the intake and outlet of a pumped storage power station, which can maintain the overall stability of the slope and avoid local collapse of the slope.

[0004] The slope support structure in the water level variable amplitude area of the intake and outlet of the pumped storage power station provided by the embodiment of this application includes:

[0005] Drainage holes, the number of the drainage holes is multiple, one end of the drainage holes extends into the slope, and the other end extends to the slope surface. A plastic blind drain pipe is arranged in the drainage holes, and the plastic blind drain pipe extends a preset length along the length direction of the drainage holes;

[0006] Gravel cushion layer and reinforced concrete slope paving, the gravel cushion layer is laid on the slope surface, and the reinforced concrete slope paving is laid on the outer surface of the gravel cushion layer;

[0007] Drainage perforated pipe, the drainage perforated pipe is configured to pass through the gravel cushion layer and the reinforced concrete slope paving and be connected to the plastic blind drain pipe, and one end of the drainage perforated pipe far from the plastic blind drain pipe is exposed outside the reinforced concrete slope paving. An asphalt hemp rope is plugged at the junction of the drainage perforated pipe and the gravel cushion layer.

[0008] In addition, the slope support structure provided by the embodiment of this application may also have the following additional technical features:

[0009] In an alternative solution, the slope support structure further includes a geotextile, and the geotextile is wrapped around at least part of the outer wall of the plastic blind drain pipe and at least part of the outer wall of the non-exposed section of the drainage perforated pipe.

[0010] In an alternative solution, the drain holes are arranged obliquely to the horizontal plane, and the inclination elevation angle of the drain holes is 5-10°, the aperture of the drain holes is 80 mm, and the opening depth is 3-5 m; a plurality of the drain holes are arranged in a plum blossom shape, and the distance between two adjacent drain holes is 3 m.

[0011] In an alternative solution, the laying thickness of the gravel cushion layer is 10-15 cm, and the laying thickness of the reinforced concrete slope protection is 30 cm.

[0012] In an alternative solution, the length of the drain perforated pipe exposed outside the reinforced concrete slope protection is 5-10 cm, and the drain perforated pipe is made of PE material.

[0013] The beneficial effects of the embodiments of the present application are as follows:

[0014] In the slope support structure in the embodiments of the present application, the water level variation range is controlled by arranging the water level area drain hole structure, and the plastic blind drain pipe and the drain perforated pipe are used to make the slope support structure have the advantages of convenient construction and good drainage performance, can maintain the water pressure stability, avoid the reverse pressure difference in the concrete slope protection from damaging the structure, and thus effectively solve the slope instability caused by poor support and drainage of the soil slope.

[0015] It should be understood that the above general description and the following detailed description are only exemplary and do not limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the slope support structure provided by the present application in a specific embodiment.

[0017] Reference numerals: drain hole 1, plastic blind drain pipe 2, gravel cushion layer 3, reinforced concrete slope protection 4, drain perforated pipe 5, asphalt hemp rope 6, geotextile 7.

[0018] The accompanying drawings here are incorporated into the description and form a part of the description, showing the embodiments consistent with the present application, and are used together with the description to explain the principles of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to better understand the technical solutions of the present application, the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0020] It should be clear that the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0021] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The singular forms "a", "the", and "said" used in the embodiments of the present application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0022] It should be understood that the term "and / or" used herein is only a relationship describing associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0023] It should be noted that the orientation terms such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described from the angles shown in the drawings and should not be construed as limitations on the embodiments of the present application. In addition, in the context, it should also be understood that when it is mentioned that an element is connected "above" or "below" another element, it can not only be directly connected "above" or "below" another element, but also be indirectly connected "above" or "below" another element through an intermediate element.

[0024] As Figure 1 shown, the embodiments of the present application provide a slope support structure in the water level fluctuation area of the intake and outlet of a pumped storage power station. This slope support structure is mainly applicable to the slopes in the water level fluctuation area that meet the safety requirements of hydraulic structures, such as the slopes at the inlet and outlet of a pumped storage power station.

[0025] The slope support structure provided by the embodiments of the present application mainly includes drain holes 1, a gravel cushion layer 3, a reinforced concrete slope lining 4, and a drain perforated pipe 5. Among them, the number of drain holes 1 is multiple. One end of the drain hole 1 extends into the slope, and the other end extends to the slope surface. A plastic blind drain pipe 2 is arranged in the drain hole 1, and the plastic blind drain pipe 2 extends a preset length along the length direction of the drain hole 1. The gravel cushion layer 3 is laid on the slope surface, and the reinforced concrete slope lining 4 is laid on the outer surface of the gravel cushion layer 3. The setting of the gravel cushion layer 3 and the reinforced concrete slope lining 4 can effectively prevent local collapse of the slope. The drain perforated pipe 5 is configured to pass through the gravel cushion layer 3 and the reinforced concrete slope lining 4 and be connected to the plastic blind drain pipe 2, and one end of the drain perforated pipe 5 away from the plastic blind drain pipe 2 is exposed outside the reinforced concrete slope lining 4. An asphalt hemp rope 6 is plugged at the junction of the drain perforated pipe 5 and the gravel cushion layer 3.

[0026] In this embodiment, the slope support structure controls the water level fluctuation by arranging the drainage holes 1 in the water level area, and utilizes the plastic blind ditch pipe 2 and the drainage flower pipe 5 to make the slope support structure have the advantages of convenient construction and good drainage. It can maintain stable water pressure and avoid the reverse pressure difference caused by the concrete slope to damage the structure, thereby effectively solving the problem of slope instability caused by poor support and drainage of the soil slope.

[0027] like Figure 1 As shown, in a specific embodiment, the slope support structure further includes a geotextile 7, which covers at least a portion of the outer wall of the plastic blind ditch pipe 2 and at least a portion of the outer wall of the non-exposed section of the drainage flower pipe 5. The wrapping of the geotextile 7 can effectively prevent fine particles from being carried out.

[0028] like Figure 1 As shown, in a specific embodiment, the arrangement of the drainage holes 1 can be arranged according to the needs of the specific project and the water permeability of the soil. For example, the drainage hole 1 has an inclination angle of 5 to 10°, a hole diameter of 80 mm, and an opening depth of 3 to 5 m; multiple drainage holes 1 are arranged in a plum blossom shape, and the distance between two adjacent drainage holes 1 is 3 m. Of course, in some other embodiments, other values of the depth and spacing of the drainage holes 1 can be preset, which will not be described in detail in this article.

[0029] like Figure 1 As shown, in a specific embodiment, the laying thickness of the crushed stone cushion layer 3 is 10-15 cm, and the laying thickness of the reinforced concrete slope 4 is 30 cm. In addition, the length of the drainage flower pipe 5 exposed from the reinforced concrete slope 4 is 5-10 cm, and the drainage flower pipe 5 is made of PE material. Generally speaking, the diameter of the drainage flower pipe 5 can be 70 mm. The drainage flower pipe 5 made of PE material has strong anti-aging ability, thereby improving the service life of the entire slope support structure.

[0030] The slope support structure in the embodiment of the present application can be constructed according to the following steps:

[0031] 1) After the slope construction is completed, the drainage holes 1 are drilled. The diameter, depth and number of the drainage holes 1 can be preset according to the scale of the slope. For example, the diameter of the drainage holes 1 can be 80 mm, the depth is 5 m, the spacing between rows is 3 m × 3 m, the elevation angle is 5 to 10°, and the drainage holes 1 are arranged in a plum blossom shape, and then a crushed stone cushion layer 3 is laid.

[0032] 2) A drainage flower pipe 5 is arranged at the junction of the structure and the reinforced concrete panel and the crushed stone cushion layer 3. The length is 10 cm of the exposed reinforced concrete. One section of the drainage flower pipe 5 is connected to the blind ditch pipe, and 5 cm of the exposed reinforced concrete panel is wrapped with geotextile 7 on the outside of the opening area.

[0033] 3) Use asphalt hemp rope 6 to seal the gap at the junction of the drainage flower pipe 5 and the gravel cushion layer 3, and wrap the geotextile 7 around the outside of the opening area to prevent fine particles from being brought out.

[0034] 4) Carry out the construction of reinforced concrete panels, and do a good job in protecting the drainage flower pipe 5 and maintaining the reinforced concrete panels.

[0035] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A slope support structure in the water level variable amplitude area of the intake and outlet of a pumped storage power station, characterized in that, Including: Drainage holes, the number of the drainage holes is multiple, one end of each drainage hole extends into the slope interior, and the other end extends to the slope surface. A plastic blind drain pipe is arranged in the drainage hole, and the plastic blind drain pipe extends a preset length along the length direction of the drainage hole; Gravel cushion layer and reinforced concrete slope lining, the gravel cushion layer is laid on the slope surface, and the reinforced concrete slope lining is laid on the outer surface of the gravel cushion layer; Drainage perforated pipe, the drainage perforated pipe is configured to pass through the gravel cushion layer and the reinforced concrete slope lining and be connected to the plastic blind drain pipe, and one end of the drainage perforated pipe away from the plastic blind drain pipe is exposed outside the reinforced concrete slope lining. An asphalt hemp rope is plugged at the junction of the drainage perforated pipe and the gravel cushion layer.

2. The slope support structure in the water level amplitude change area of the intake and outlet of the pumped storage power station according to claim 1, characterized in that It further includes a geotextile, and the geotextile is wrapped around at least part of the outer wall of the plastic blind drain pipe and at least part of the outer wall of the non-exposed section of the drainage perforated pipe.

3. The slope support structure in the water level variable range area of the intake and outlet of the pumped storage power station according to claim 1 or 2, characterized in that, The drainage holes are arranged obliquely to the horizontal plane direction, and the inclined elevation angle of the drainage holes is 5 - 10°. The aperture of the drainage holes is 80 mm, and the opening depth is 3 - 5 m; the multiple drainage holes are arranged in a plum blossom shape, and the distance between two adjacent drainage holes is 3 m.

4. The slope support structure in the water level variable amplitude area of the intake and outlet of the pumped storage power station according to claim 3, characterized in that, The laying thickness of the gravel cushion layer is 10 - 15 cm, and the laying thickness of the reinforced concrete slope lining is 30 cm.

5. The slope support structure in the water level variable amplitude area of the intake and outlet of the pumped storage power station according to claim 1 or 2 or 4, characterized in that, The length of the drainage perforated pipe exposed outside the reinforced concrete slope lining is 5 - 10 cm, and the drainage perforated pipe is made of PE material.

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