A fountain type surge chamber structure suitable for poor terrain conditions

Abstract

The utility model provides a kind of topography condition insufficient fountain type surge chamber structure, it is characterized in that, including ground structure, shaft, impedance hole section and pressure pipeline;The ground structure is arranged above ground;The shaft is arranged below ground structure;The impedance hole section is arranged below the shaft;The pressure pipeline is arranged below the impedance hole section;The ground structure, the shaft, the impedance hole section and the pressure pipeline are connected from top to bottom and form surge chamber structure.This utility model can make full use of topography condition, effectively solve surge too high, topography condition insufficient, when, conventional surge chamber ground room structure is too high and lead to ground structure safety low, overall stability is poor, affect side slope stability, operation and maintenance are not convenient etc. Problem, can effectively reduce surge chamber height, effectively dissipate.

Description

Technical Field

[0001] This utility model belongs to the technical field of surge tanks in water conservancy and hydropower engineering, specifically relating to a fountain-type surge tank structure suitable for terrain conditions with insufficient resources. Background Technology

[0002] The commonly used layouts for surge tanks in hydropower projects are buried and open types, which are suitable when the terrain elevation is appropriate and the geological conditions are favorable. When the terrain elevation is insufficient, neither buried nor open surge tanks can be constructed. The surge tank structure must then extend upwards to form a tall cylindrical structure above ground, making ground structure safety and operation and maintenance major issues. When geological conditions are poor, the overall stability of the ground structure and slope stability caused by leakage in the surge tank structure become even more critical problems. Therefore, the design of the surge tank structure directly affects the safety, progress, and economy of the project. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a fountain-type surge tank structure suitable for areas with insufficient terrain conditions. It can effectively solve the problems of low ground structure safety, poor overall stability, impact on slope stability, and inconvenience in operation and maintenance caused by the excessive height of the ground chamber structure in conventional surge tanks when the terrain and geological conditions are insufficient in high seismic zones. This utility model can effectively reduce the height of the surge tank and effectively dissipate energy.

[0004] The technical solution adopted in this utility model is as follows:

[0005] This utility model provides a fountain-type pressure regulating chamber structure suitable for terrain conditions with insufficient conditions, including a ground structure (1), a vertical shaft (2), an impedance orifice section (3), and a pressure pipe (4); the ground structure (1) is arranged above the ground; the vertical shaft (2) is arranged below the ground structure (1); the impedance orifice section (3) is arranged below the vertical shaft (2); the pressure pipe (4) is arranged below the impedance orifice section (3); the ground structure (1), the vertical shaft (2), the impedance orifice section (3), and the pressure pipe (4) are connected from top to bottom to form a pressure regulating chamber structure.

[0006] Preferably, the horizontal cross-sectional shape of the ground structure (1) is circular; the ground structure (1) includes a retaining wall (7), dry-laid stone (8) and a base plate (9); the dry-laid stone (8) is laid around the perimeter of the wellhead of the vertical shaft (2); the base plate (9) is arranged at the bottom of the dry-laid stone (8); the base plate (9) is provided with structural joints, waterstops and joint filling materials; the retaining wall (7) is provided on the outer perimeter of the dry-laid stone (8); the retaining wall (7) is a mortar-grouted stone retaining wall.

[0007] Preferably, the vertical shaft (2) has a circular horizontal cross-section, and the center of its horizontal cross-section is at the same position as the center of the ground structure (1); the top surface of the vertical shaft (2) extends beyond the upper surface of the dry-laid stone (8) of the ground structure (1), and a drainage pipe (6) is installed at a position corresponding to the bottom height of the dry-laid stone (8), and the drainage pipe (6) is sealed with non-woven fabric; the bottom plate of the vertical shaft (2) is provided with holes of the same center and size as the impedance hole section (3) and connected to each other; an anti-seepage layer (10) is provided between the shaft structure (5) of the vertical shaft (2) and the surrounding rock.

[0008] Preferably, the impedance hole section (3) has a circular horizontal cross-section, and the center of its horizontal cross-section is the same as the center of the vertical shaft (2); the impedance hole section (3) has a reinforced concrete lining structure; and the top of the impedance hole section (3) is connected to the lower surface of the bottom plate of the vertical shaft (2).

[0009] Preferably, the pressure pipe (4) is arranged horizontally, intersects perpendicularly with and connects to the impedance hole section (3); the pressure pipe (4) is constructed with reinforced concrete lining.

[0010] The fountain-type pressure regulating chamber structure provided by this utility model, suitable for terrain conditions with insufficient resources, has the following advantages:

[0011] This invention effectively solves the problems of low ground structure safety, poor overall stability, impact on slope stability, and inconvenience in operation and maintenance caused by the excessive height of the conventional surge tank structure when terrain conditions are insufficient. This invention can effectively reduce the height of the surge tank and effectively dissipate energy. Attached Figure Description

[0012] Figure 1 A cross-sectional view of a fountain-type pressure regulating chamber structure suitable for terrain conditions with insufficient conditions provided by this utility model;

[0013] Figure 2 A top view of a fountain-type pressure regulating chamber structure suitable for terrain conditions that are not ideal, provided by this utility model.

[0014] Wherein: 1---Ground structure; 2---Vertical shaft; 3---Impedance section; 4---Pressure pipeline; 5---Well body structure; 6---Drainage pipe; 7---Retaining wall; 8---Dry masonry; 9---Base slab; 10---Impermeable layer. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0016] This invention can make full use of terrain conditions and effectively solve the problems of low ground structure safety, poor overall stability, impact on slope stability, and inconvenience in operation and maintenance caused by excessively high ground structure of conventional surge chambers when the surge is too high or the terrain conditions are insufficient. It can effectively reduce the height of the surge chamber and effectively dissipate energy.

[0017] like Figure 1 As shown, this utility model discloses a fountain-type pressure regulating chamber structure suitable for terrain conditions with insufficient conditions, including a ground structure 1, a vertical shaft 2, an impedance orifice section 3, and a pressure pipe 4; the ground structure 1 is arranged above the ground; the vertical shaft 2 is arranged below the ground structure 1; the impedance orifice section 3 is arranged below the vertical shaft 2; the pressure pipe 4 is arranged below the impedance orifice section 3; the ground structure 1, the vertical shaft 2, the impedance orifice section 3, and the pressure pipe 4 are connected from top to bottom to form a pressure regulating chamber structure.

[0018] Specifically, the ground structure 1 is arranged above the ground, and its horizontal cross-section is circular. Its shape can be any closed shape that adapts to the terrain conditions and meets the hydraulic requirements and water tongue length. The ground structure 1 includes a retaining wall 7, dry-laid stone 8, and a base slab 9. The dry-laid stone 8 is laid around the perimeter of the wellhead of the vertical shaft 2. The base slab 9 is arranged at the bottom of the dry-laid stone 8. The base slab 9 should be provided with structural joints, waterstops, and joint filling materials according to the design requirements. The retaining wall 7 is set around the outer perimeter of the dry-laid stone 8. The retaining wall 7 is a mortar-grouted masonry retaining wall, and its height is calculated based on the maximum surge elevation and the volume of the upper pool.

[0019] The vertical shaft 2 has a circular horizontal cross-section, is arranged below and connected to the ground structure 1, and its horizontal cross-section center is at the same position as the center of the ground structure 1; the top surface of the vertical shaft 2 should extend beyond the upper surface of the dry-laid stone 8 of the ground structure 1, and a drainage pipe 6 is installed at the height corresponding to the bottom surface of the dry-laid stone 8, and the drainage pipe 6 is sealed with non-woven fabric; the bottom plate of the vertical shaft 2 is provided with holes of the same center and size as the impedance hole section 3 and is connected to them; a seepage-proof layer 10 is provided between the shaft body structure 5 of the vertical shaft 2 and the surrounding rock, i.e., the well wall rock and soil, and the seepage-proof layer 10 can be any form with underground structure seepage-proof function.

[0020] The impedance section 3 has a circular horizontal cross-section, is arranged below and connected to the vertical shaft 2, and its horizontal cross-section center is in the same position as the center of the vertical shaft 2; the impedance section 3 is constructed of reinforced concrete lining; the top of the impedance section 3 should be connected to the lower surface of the bottom plate of the vertical shaft 2.

[0021] The pressure pipe 4 is arranged horizontally, intersecting and connecting perpendicularly with the impedance orifice section 3; the pressure pipe 4 is constructed with reinforced concrete lining.

[0022] This utility model discloses a fountain-type surge tank structure suitable for terrain conditions with limited accessibility. The bottom of the vertical shaft 2 is connected to a horizontally arranged pressure pipe 4 through an impedance orifice section 3. The diameter of the impedance orifice section 3 is smaller than the diameter of the vertical shaft 2, thus forming a fountain-type structure. The seepage prevention performance of the structure is improved by the installation of an impermeable layer. This structure has high ground structural safety and overall stability, and will not affect slope stability, thus facilitating operation.

[0023] The following example, using a conventional hydropower station project that adopted the technical solution of this utility model, further illustrates the concept with reference to the accompanying drawings:

[0024] In a conventional hydropower station project, the ground elevation is 125m. The upper part of this location consists of residual slope debris and soil, while the middle and lower parts are alternating mudstone and sandstone with a thickness of about 60m. The highest surge water level in the conventional scheme is 136.4m. Insufficient ground elevation and poor geological conditions pose challenges to the construction of conventional surge chambers. Therefore, the pressure regulating chamber structure of this utility model is set in this project: the ground structure 1 is circular with a radius of 20m, the retaining wall 7 is a masonry retaining wall with a slope ratio of 1:0.25; the bottom plate 9 is 0.5m thick, and dry-laid stone 8 is laid on top; the vertical shaft 2 has an inner diameter of 22.5m and adopts a reinforced concrete structure, with a seepage-proof layer 10 formed by spraying flexible polymer mortar between the structure and the surrounding rock; the top surface of the vertical shaft 2 should exceed the upper surface of the dry-laid stone 8 of the ground structure 1, and a drainage pipe 6 is set at the height of the bottom surface of the dry-laid stone 8, and the drainage pipe 6 is sealed with non-woven fabric; the impedance hole section 3 has a diameter of 4.2m and adopts the form of reinforced concrete, and its bottom is vertically connected to the pressure pipe 4; the pressure pipe 4 is arranged horizontally with a diameter of 7.0m and adopts the form of reinforced concrete.

[0025] The above-mentioned technical solution disclosed in this utility model solves the problems of low ground structure safety, poor overall stability, impact on slope stability, and inconvenience of operation and maintenance caused by the excessive height of the ground chamber structure of conventional surge tanks when the terrain and geological conditions are insufficient. It can effectively reduce the height of the surge tank and effectively dissipate energy.

[0026] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A fountain-type pressure regulating chamber structure suitable for terrain conditions with insufficient conditions, characterized in that, It includes a ground structure (1), a vertical shaft (2), an impedance orifice section (3), and a pressure pipe (4); the ground structure (1) is arranged above the ground; the vertical shaft (2) is arranged below the ground structure (1); the impedance orifice section (3) is arranged below the vertical shaft (2); the pressure pipe (4) is arranged below the impedance orifice section (3); the ground structure (1), the vertical shaft (2), the impedance orifice section (3), and the pressure pipe (4) are connected from top to bottom to form a pressure regulating chamber structure.

2. The fountain-type pressure regulating chamber structure applicable to insufficient terrain conditions according to claim 1, characterized in that, The horizontal cross-sectional shape of the ground structure (1) is circular; the ground structure (1) includes a retaining wall (7), dry-laid stone (8) and a base plate (9); the dry-laid stone (8) is laid around the perimeter of the wellhead of the vertical shaft (2); the base plate (9) is arranged at the bottom of the dry-laid stone (8); the base plate (9) is provided with structural joints, waterstops and joint filling materials; the retaining wall (7) is set on the outer perimeter of the dry-laid stone (8); the retaining wall (7) is a mortar-grouted stone retaining wall.

3. The fountain-type pressure regulating chamber structure suitable for terrain conditions with insufficient conditions as described in claim 2, characterized in that, The vertical shaft (2) has a circular horizontal cross-section, and the center of its horizontal cross-section is the same as the center of the ground structure (1). The top surface of the vertical shaft (2) extends beyond the upper surface of the dry-laid stone (8) of the ground structure (1), and a drainage pipe (6) is installed at a position corresponding to the bottom height of the dry-laid stone (8). The drainage pipe (6) is sealed with non-woven fabric. The bottom plate of the vertical shaft (2) is provided with holes of the same center and size as the impedance hole section (3) and connected to each other. An anti-seepage layer (10) is provided between the shaft structure (5) of the vertical shaft (2) and the surrounding rock.

4. The fountain-type pressure regulating chamber structure applicable to insufficient terrain conditions according to claim 1, characterized in that, The impedance hole section (3) has a circular horizontal cross-section, and its center is the same as the center of the vertical shaft (2); the impedance hole section (3) is constructed of reinforced concrete lining; the top of the impedance hole section (3) is connected to the lower surface of the bottom plate of the vertical shaft (2).

5. The fountain-type pressure regulating chamber structure applicable to insufficient terrain conditions according to claim 1, characterized in that, The pressure pipe (4) is arranged horizontally and intersects and connects perpendicularly with the impedance hole section (3); the pressure pipe (4) is constructed of reinforced concrete lining.

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