A high slope support structure for excavation of reservoir basin of pumped storage power station

Abstract

The utility model provides a high slope support structure for excavation of a reservoir basin of a pumped storage power station, including a support system structure and a drainage system, wherein the support system structure and the drainage system are arranged in a staggered manner on the high slope excavation surface, the support system structure and the steel mesh are arranged on the high slope excavation surface in coordination with a connection structure, and a concrete layer is sprayed on the support system structure and the steel mesh, and the thickness of the concrete layer is 12cm-15cm. The utility model is conducive to layered support when supporting the high slope of the reservoir basin of a pumped storage power station, and can ensure the stability of the high slope support structure of the reservoir basin of the pumped storage power station, thereby avoiding bearing large soil pressure, water pressure and other forces, and effectively avoiding problems such as slope landslide, deformation and settlement.

Description

Technical Field

[0001] The utility model relates to the technical field of high slope support for reservoir basin excavation, in particular to a high slope support structure for reservoir basin excavation in a pumped storage power station. Background Art

[0002] The reservoir of a pumped storage power station is an important part of the power station. Its main function is to store water for power generation. The design and construction of the reservoir needs to take into account multiple factors, such as topography, geology, hydrology, etc., to ensure its safety, stability, economy and environmental protection.

[0003] The reservoir basin should be located in an area with good topographic and geological conditions to avoid natural disasters such as landslides and mudslides. At the same time, detailed geological surveys of the reservoir basin are required to understand the distribution, properties and structure of the rock and soil layers to provide a basis for the design; the reservoir basin should take into account the hydrological conditions and understand the laws of runoff, floods, low water and other laws in the basin to rationally plan the reservoir capacity and water for power generation; the construction of the reservoir basin should minimize damage and pollution to the environment and take corresponding environmental protection measures, such as soil and water conservation and ecological restoration; the construction of the reservoir basin should fully consider safety, including the design of water retaining, flood discharge, and sand discharge to ensure the normal operation and service life of the reservoir basin. In practice, the excavation slope of the reservoir basin is as high as more than 100 meters. In addition, the mutual interference between the high slope support and the excavation, the untimely support or the support progress cannot keep up with the excavation progress will inevitably affect the safety of the high slope. The existing technology of high slope support in the reservoir basin of pumped storage power stations has the following technical problems:

[0004] The high slope support structure of the reservoir basin excavation of the pumped storage power station has poor stability. When it is subjected to large earth pressure, water pressure and other forces, it is prone to problems such as slope landslide, deformation and settlement.

[0005] Therefore, there is an urgent need for a high slope support structure for excavation of a reservoir basin of a pumped storage power station to solve the above problems. Summary of the invention

[0006] The purpose of the utility model is to overcome the above-mentioned shortcomings and provide a high slope support structure for excavating a reservoir basin of a pumped storage power station to solve the problems raised in the background technology.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is: a high slope support structure for excavation of a reservoir basin of a pumped storage power station, including a support system structure and a drainage system, wherein the support system structure and the drainage system are arranged in a staggered manner on the high slope excavation surface, the support system structure and the steel mesh are arranged on the high slope excavation surface through a connecting structure, a concrete layer is sprayed on the support system structure and the steel mesh, and the thickness of the concrete layer is 12cm-15cm.

[0008] Preferably, the support system structure includes locking anchor piles, slope locking anchor rods and slope system anchor rods. The locking anchor piles are arranged in multiple rows and columns on the top sections of each excavation of the high slope, and the slope locking anchor rods and slope system anchor rods are staggered in multiple rows and columns on each slope section of the high slope excavation.

[0009] Preferably, the steel mesh is respectively matched and fixed with the locking anchor piles, the slope locking anchor rods and the slope system anchor rods through connecting structures.

[0010] Preferably, the connecting structure includes a U-shaped mounting plate, a grab plate for fixing the steel mesh is provided on the U-shaped mounting plate, a T-shaped slot is provided on the inner side of the U-shaped mounting plate, and a clamping plate for cooperating with the bottom of the U-shaped mounting plate and clamping the support system structure is slidably provided in the T-shaped slot.

[0011] Preferably, the T-slot is open near the inner side wall of the U-shaped mounting plate, and the T-slot is open on the side wall of the open end of the U-shaped mounting plate.

[0012] Preferably, both ends of the clip are sliders that cooperate with the T-slot, the sliders are connected through an arc-shaped clip, and the clip is provided with a threaded rod that passes through the T-slot and a nut that cooperates with the threaded rod to fix the clip, the threaded rod is fixedly connected to the slider, and the threaded rod extends from the arc section of the U-shaped mounting plate and is sleeved with the nut.

[0013] Preferably, the drainage system includes a drainage structure arranged on the excavated surface of a high slope and a drainage pipe arranged therein, the drainage structure includes a gravel layer and a geotextile layer arranged in sequence outside the drainage pipe, the drainage pipe body is provided with a plurality of filter holes, and the distance between two adjacent drainage pipes is 3.8m-4.2m.

[0014] Preferably, when the high slope excavation surface is excavated in stages, the slope locking anchor rods are arranged at the upper part of each slope; and the slope system anchor rods are arranged at the lower part of each slope.

[0015] Preferably, the spacing between two adjacent locking anchor piles is 1.8m-2.2m; the spacing between two adjacent slope locking anchor rods is 1.8m-2.2m; the spacing between two adjacent slope system anchor rods is 1.8m-2.2m.

[0016] Preferably, the length of the locking anchor pile is 12m-15m, and the diameter is 32mm; the length of the slope locking anchor rod is 9m-12m, and the diameter is 28mm; the length of the slope system anchor rod is 6m-8m, and the diameter is 25mm.

[0017] The utility model has the following beneficial effects:

[0018] 1. The utility model is conducive to layered support when supporting high slopes in the reservoir basin of a pumped storage power station, and can ensure the stability of the high slope support structure in the reservoir basin of a pumped storage power station, thereby avoiding bearing large earth pressure, water pressure and other forces, and effectively avoiding problems such as slope landslides, deformation and settlement. That is, by arranging multiple rows and columns of locking anchor piles on each excavated top section of the high slope, the slippage and collapse of the top of the slope can be effectively prevented, and the overall stability of the slope can be improved. At the same time, the multiple rows and columns of slope locking anchor rods and slope system anchor rods arranged on each slope section can further reinforce the slope to prevent the slope from In order to prevent local slip and collapse, multiple rows and columns of drainage holes and drainage structures are set up to effectively drain the groundwater inside the slope, reduce water pressure, reduce the destructive effect of seepage on the slope, and improve the stability of the slope. The steel mesh matched with the lock anchor piles, slope lock anchor rods and slope system anchor rods is laid on the excavated section to enhance the bearing capacity of the slope and improve the shear and tensile resistance of the slope. The concrete layer sprayed on the steel mesh, lock anchor piles, slope lock anchor rods and slope system anchor rods can protect the slope from wind and rain erosion and biological damage, which is conducive to the protection and maintenance of the slope environment.

[0019] 2. The utility model matches the steel mesh with the locking anchor pile, the slope locking anchor rod and the slope system anchor rod respectively by setting a unified connection structure, thereby avoiding the problem of needing to set different connection structures to match the steel mesh according to the different structures of the locking anchor pile, the slope locking anchor rod and the slope system anchor rod;

[0020] 3. The connection structure of the utility model is convenient for fixing on the locking anchor piles, slope locking anchor rods and slope system anchor rods of different structures, and buckles the steel mesh on the slope at the same time;

[0021] 4. The slider in the clip of the utility model is conducive to the sliding cooperation with the T-shaped slide groove, and the arc-shaped clip is conducive to the cooperation with the locking anchor pile, the slope locking anchor rod and the columnar rod body in the slope system anchor rod;

[0022] 5. The drainage structure in the utility model has good drainage effect, can protect the slope environment, ensure the smooth flow of drainage pipes, prevent blockage and has strong adaptability;

[0023] 6. The utility model sets the slope locking anchor rod at the upper part of each slope, which can effectively prevent the upper rock or soil from sliding, and increase the overall stability of the slope. At the same time, the slope system anchor rod is set at the lower part of each slope, which can prevent the lower rock or soil from moving, and further enhance the stability of the slope;

[0024] 7. The purpose of limiting the spacing between the locking anchor piles, the slope locking anchor rods, the slope system anchor rods and the drainage holes in the present invention is to ensure the support stability, improve the construction efficiency and reduce the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the utility model;

[0026] Figure 2 It is a schematic diagram of the connection structure in the utility model;

[0027] Figure 3 It is a partial cross-sectional view of the connection structure in the utility model;

[0028] Figure 4 It is a structural schematic diagram of a grab piece provided on a U-shaped mounting plate in the utility model;

[0029] Figure 5 This is a schematic diagram of the structure in which the clip and the threaded rod cooperate with each other in the utility model;

[0030] Figure 6 It is a schematic diagram of the drainage structure in the utility model. DETAILED DESCRIPTION

[0031] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0032] See also Figures 1 to 6 A high slope support structure for excavation of a reservoir basin of a pumped storage power station includes a support system structure 1 and a drainage system 2. The support system structure 1 and the drainage system 2 are arranged in a staggered manner on the high slope excavation surface. The support system structure 1 is matched with a steel mesh 3 through a connection structure 4 and is arranged on the high slope excavation surface. A concrete layer 5 is sprayed on the support system structure 1 and the steel mesh 3. The thickness of the concrete layer 5 is 12cm-15cm. The steel mesh matched with the locking anchor pile, the slope locking anchor rod and the slope system anchor rod is laid on the excavation section surface to enhance the bearing capacity of the slope and improve the shear and tensile resistance of the slope. The concrete layer sprayed on the steel mesh, the locking anchor pile, the slope locking anchor rod and the slope system anchor rod can protect the slope from wind and rain erosion and biological damage, which is beneficial to the protection and maintenance of the slope environment.

[0033] Preferably, the support system structure 1 includes locking anchor piles 1.1, slope locking anchor rods 1.2 and slope system anchor rods 1.3, wherein the locking anchor piles 1.1 are arranged in multiple rows and multiple columns on the top sections of each excavation of the high slope, and the slope locking anchor rods 1.2 and slope system anchor rods 1.3 are staggered in multiple rows and multiple columns on each slope section of the high slope excavation. By arranging multiple rows and multiple columns of locking anchor piles on each excavation top section of the high slope, the slippage and collapse of the top of the slope can be effectively prevented, and the overall stability of the slope can be improved. The multiple rows and multiple columns of slope locking anchor rods and slope system anchor rods arranged on each slope section can further reinforce the slope and prevent local slippage and collapse of the slope.

[0034] Preferably, the steel mesh 3 is respectively matched and fixed with the locking anchor pile 1.1, the slope locking anchor rod 1.2 and the slope system anchor rod 1.3 through the connection structure 4. By setting a unified connection structure, the steel mesh is matched with the locking anchor pile, the slope locking anchor rod and the slope system anchor rod respectively, thereby avoiding the problem of setting different structures of connection structures to match the steel mesh according to the different structures of the locking anchor pile, the slope locking anchor rod and the slope system anchor rod.

[0035] Preferably, the connection structure 4 comprises a U-shaped mounting plate 4.1, on which a gripping piece 4.2 for fixing the steel mesh 3 is arranged, and a T-shaped slot 4.3 is arranged inside the U-shaped mounting plate 4.1, and a clip 4.4 is slidably arranged in the T-shaped slot 4.3 to match the bottom of the U-shaped mounting plate 4.1 and clamp the support system structure 1. The connection structure is convenient for fixing on locking anchor piles, slope locking anchor rods and slope system anchor rods of different structures, and buckles the steel mesh on the slope at the same time.

[0036] Preferably, the T-slot 4.3 is open near the inner side wall of the U-shaped mounting plate 4.1, and the T-slot 4.3 is open on the side wall of the open end of the U-shaped mounting plate 4.1.

[0037] Preferably, the two ends of the clip 4.4 are sliders 4.4.1 that match the T-slot 4.3, the sliders 4.4.1 are connected by arc-shaped clips 4.4.2, the clips 4.4 are provided with threaded rods 4.5 that penetrate the T-slot 4.3 and nuts 4.6 that match the threaded rods 4.5 to fix the clips 4.4, the threaded rods 4.5 are fixedly connected to the sliders 4.4.1, and the ends of the threaded rods 4.5 that extend out of the arc section of the U-shaped mounting plate 4.1 are sleeved with the nuts 4.6. The sliders in the clips are conducive to sliding with the T-slots, and the arc-shaped clips are conducive to matching with the columnar rods in the locking anchor piles, the slope locking anchor rods and the slope system anchor rods. In practice, the bottom of the U-shaped mounting plate is arc-shaped, and can also be a straight-line structure.

[0038] Preferably, the drainage system 2 comprises a drainage structure 2.1 arranged on the high slope excavation surface and a drainage pipe 2.2 arranged therein, the drainage structure 2.1 comprises a crushed stone layer 2.1.1 and a geotextile layer 2.1.2 arranged outside the drainage pipe 2.2 in sequence, the drainage pipe 2.2 is provided with a plurality of filter holes 2.2.1, and the distance between two adjacent drainage pipes 2.2 is 3.8m-4.2m. The drainage structure has a good drainage effect, can protect the slope environment, ensure the smoothness of the drainage pipe, prevent blockage and has strong adaptability.

[0039] Preferably, when the high slope excavation surface is excavated in stages, the slope locking anchor rods 1.2 are arranged at the upper part of each slope; and the slope system anchor rods 1.3 are arranged at the lower part of each slope.

[0040] Preferably, the spacing between two adjacent locking anchor piles 1.1 is 1.8m-2.2m; the spacing between two adjacent slope locking anchor rods 1.2 is 1.8m-2.2m; the spacing between two adjacent slope system anchor rods 1.3 is 1.8m-2.2m.

[0041] Preferably, the length of the locking anchor pile 1.1 is 12m-15m, and the diameter is 32mm; the length of the slope locking anchor rod 1.2 is 9m-12m, and the diameter is 28mm; the length of the slope system anchor rod 1.3 is 6m-8m, and the diameter is 25mm. The purpose of limiting the spacing between the locking anchor pile, the slope locking anchor rod, the slope system anchor rod and the drainage system is to ensure support stability, improve construction efficiency and reduce costs.

[0042] The working principle of this embodiment is as follows:

[0043] The excavation of the rockwork on the slopes of various parts is carried out according to the specific requirements of the support methods and methods. The high slope rapid excavation and support method of "graded pre-splitting, step blasting, layered slag discharge, and layered support" is adopted for construction. On the excavated slope, after the upper layer of slag (the layered slag discharge height does not exceed 4m) is excavated and transported, the lower layer of slag is used as a construction platform to carry out the construction of the locking anchor piles 1.1, slope locking anchor rods 1.2, slope system anchor rods 1.3 and drainage system 2, steel mesh 3 and concrete layer 5 of each excavation section. For example, in the excavation of the top section, multiple rows and columns of locking anchor piles 1.1, drainage system 2, steel mesh 3 and concrete layer 5 are constructed. In the slope section outside the top section, multiple rows and columns of slope locking anchor rods 1.2, slope system anchor rods 1.3 and drainage system 2, steel mesh 3 and concrete layer 5 are constructed;

[0044] When the connection structure 4 is used to connect the steel mesh 3 and the support system structure 1, when the T-slot 4.3 is opened at one end of the U-shaped mounting plate 4.1, the clamping piece 4.4 can be removed and the U-shaped mounting plate 4.1 can be slid from one side of the open end to the bottom side and put on the locking anchor pile 1.1, the slope locking anchor rod 1.2 or the slope system anchor rod 1.3. At this time, the bottom of the U-shaped mounting plate 4.1 is respectively in contact with the locking anchor pile 1.1, the slope locking anchor rod 1.2 or the slope system anchor rod 1.3, and the grabbing piece 4.2 presses the steel mesh 3 on the slope. After matching, the clamping piece 4.4 is slid into the T-slot 4.3, and the threaded rod 4.5 is penetrated at the bottom of the U-shaped mounting plate 4.1 and fixed by the nut 4.6, so that the clamping piece 4.4 is matched with the U-shaped mounting plate 4.1 and fixed in the locking On the anchor pile 1.1, the slope locking anchor rod 1.2 and the slope system anchor rod 1.3, when the T-slot 1.3 is closed at both ends of the U-shaped mounting plate, the locking anchor pile 1.1, the slope locking anchor rod 1.2 or the slope system anchor rod 1.3 are passed through the through hole formed by the U-shaped mounting plate 4.1 and the clamping piece 4.4 from top to bottom, and the bottom of the U-shaped mounting plate 4.1 is respectively in contact with the locking anchor pile 1.1, the slope locking anchor rod 1.2 or the slope system anchor rod 1.3, and at the same time, the grabbing piece 4.2 presses the steel mesh 3 on the slope. After matching, the threaded rod 4.5 is passed through the bottom of the U-shaped mounting plate 4.1 and fixed by the nut 4.6, so that the clamping piece 4.4 and the U-shaped mounting plate 4.1 are matched and fixed on the locking anchor pile 1.1, the slope locking anchor rod 1.2 and the slope system anchor rod 1.3.

[0045] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A high slope support structure for excavation of a reservoir basin of a pumped storage power station, comprising a support system structure (1) and a drainage system (2), characterized in that: The support system structure (1) and the drainage system (2) are arranged in a staggered manner on the high slope excavation surface. The support system structure (1) and the steel mesh (3) are arranged on the high slope excavation surface in coordination with each other through a connection structure (4). A concrete layer (5) is sprayed on the support system structure (1) and the steel mesh (3). The thickness of the concrete layer (5) is 12 cm-15 cm.

2. A high slope support structure for excavation of a reservoir basin of a pumped storage power station according to claim 1, characterized in that: The support system structure (1) comprises locking anchor piles (1.1), slope locking anchor rods (1.2) and slope system anchor rods (1.3); the locking anchor piles (1.1) are arranged in a plurality of rows and columns on the top sections of each excavation of a high slope; the slope locking anchor rods (1.2) and slope system anchor rods (1.3) are arranged in a plurality of rows and columns in an alternating manner on each slope section of the high slope excavation.

3. A high slope support structure for excavation of a reservoir basin of a pumped storage power station according to claim 1, characterized in that: The steel mesh (3) is respectively matched and fixed with the locking anchor pile (1.1), the slope locking anchor rod (1.2) and the slope system anchor rod (1.3) through the connection structure (4).

4. A high slope support structure for excavation of a reservoir basin of a pumped storage power station according to claim 1, characterized in that: The connection structure (4) comprises a U-shaped mounting plate (4.1), a gripping piece (4.2) for fixing the steel mesh (3) being arranged on the U-shaped mounting plate (4.1), a T-shaped slot (4.3) being arranged on the inner side of the U-shaped mounting plate (4.1), and a clamping piece (4.4) cooperating with the bottom of the U-shaped mounting plate (4.1) for clamping the support system structure (1) being slidably arranged in the T-shaped slot (4.3).

5. A high slope support structure for excavation of a reservoir basin of a pumped storage power station according to claim 4, characterized in that: The T-shaped slot (4.3) is open near the inner side wall of the U-shaped mounting plate (4.1), and the T-shaped slot (4.3) is open on the side wall of the open end of the U-shaped mounting plate (4.1).

6. A high slope support structure for excavation of a reservoir basin of a pumped storage power station according to claim 4, characterized in that: The two ends of the clip (4.4) are sliders (4.4.1) that match the T-slot (4.3); the sliders (4.4.1) are connected via an arc-shaped clip (4.4.2); a threaded rod (4.5) that penetrates the T-slot (4.3) and a nut (4.6) that matches the threaded rod (4.5) to fix the clip (4.4); the threaded rod (4.5) is fixedly connected to the slider (4.4.1); and the end of the threaded rod (4.5) that extends out of the arc section of the U-shaped mounting plate (4.1) is sleeved with the nut (4.6).

7. A high slope support structure for excavation of a reservoir basin of a pumped storage power station according to claim 1, characterized in that: The drainage system (2) comprises a drainage structure (2.1) arranged on a high slope excavation surface and a drainage pipe (2.2) arranged therein, the drainage structure (2.1) comprising a crushed stone layer (2.1.1) and a geotextile layer (2.1.2) arranged in sequence outside the drainage pipe (2.2), the drainage pipe (2.2) having a plurality of filter holes (2.2.1) on its body, and the distance between two adjacent drainage pipes (2.2) being 3.8m-4.2m.

8. A high slope support structure for excavation of a reservoir basin of a pumped storage power station according to claim 2, characterized in that: When the high side slope excavation surface is excavated in stages, the side slope locking anchor rods (1.2) are arranged at the upper part of each side slope; and the side slope system anchor rods (1.3) are arranged at the lower part of each side slope.

9. A high slope support structure for excavation of a reservoir basin of a pumped storage power station according to claim 2, characterized in that: The spacing between two adjacent locking anchor piles (1.1) is 1.8m-2.2m; the spacing between two adjacent side slope locking anchor rods (1.2) is 1.8m-2.2m; and the spacing between two adjacent side slope system anchor rods (1.3) is 1.8m-2.2m.

10. A high slope support structure for excavation of a reservoir basin of a pumped storage power station according to claim 2, characterized in that: The locking anchor pile (1.1) has a length of 12m-15m and a diameter of 32mm; the slope locking anchor rod (1.2) has a length of 9m-12m and a diameter of 28mm; and the slope system anchor rod (1.3) has a length of 6m-8m and a diameter of 25mm.

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