CN219908839U

CN219908839U - Drainage structure of bottom plate of stilling pool

Info

Publication number: CN219908839U
Application number: CN202320589713.0U
Authority: CN
Inventors: 石磊; 徐轶
Original assignee: Changjiang Institute of Survey Planning Design and Research Co Ltd
Current assignee: Changjiang Institute of Survey Planning Design and Research Co Ltd
Priority date: 2023-03-21
Filing date: 2023-03-21
Publication date: 2023-10-27
Anticipated expiration: 2033-03-21

Abstract

The utility model discloses a water draining structure of a bottom plate of a stilling pool, wherein the middle layer is a permeable concrete layer (2-7), a transverse seam (1-3) and a longitudinal seam (1-4) are arranged between two adjacent stilling pool bottom plates (2-5), copper sheet water stops (2-3) and rubber water stops (2-4) are arranged in the transverse seam (1-3) and the longitudinal seam (1-4), the copper sheet water stops (2-3) are positioned in a normal concrete upper layer (2-6), and the rubber water stops (2-4) are positioned in a normal concrete lower layer (2-8); the anti-floating damage device overcomes the defect that part of the bottom plate of the stilling pool is blocked, failed and the like due to the drainage structure in the prior art, and has the advantages of convenience in construction, safety, reliability and convenience in maintenance.

Description

Drainage structure of bottom plate of stilling pool

Technical Field

The utility model relates to the technical field of hydraulic energy dissipation building design, in particular to a drainage structure of a bottom plate of a stilling pool.

Background

The energy dissipation pool is a commonly used energy dissipation structure in the underflow energy dissipation building, is an energy dissipation facility capable of promoting the underflow hydraulic jump to be generated at the downstream of the water discharge building, and is widely applied to water discharge energy dissipation facilities of hydropower stations, reservoirs and the like in China due to the factors of high energy dissipation efficiency, rapid change of the underflow emergency flow into slow flow, strong adaptability and the like.

In the practical application process, the problem of anti-floating stability is often easy to generate under the combined action of dynamic water pressure and lifting pressure of the bottom plate of the stilling pool.

The drainage structure is arranged on the bottom plate of the stilling pool, so that the lifting force acting on the bottom plate is reduced, and the floating stability problem of the bottom plate is reduced.

Therefore, most of the current stilling pool bottom plates are provided with drainage structures, but due to different drainage structure designs, the drainage efficiency is different, and part of stilling pool bottom plates are resistant to floating damage due to the reasons of blockage, failure and the like of the drainage structures.

At present, a relief pool bottom plate drainage structure such as a relief pool bottom plate is usually adopted to directly drill a clear drain hole on the relief pool bottom plate and a backfill sand and gravel blind ditch is arranged below the bottom plate, and the relief pool bottom plate is often damaged such as blocking and the like in the construction process and the application process.

Therefore, a structure is urgently needed to solve the above-mentioned problems.

Disclosure of Invention

The utility model aims to overcome the defects of the background technology and provides a drainage structure of a bottom plate of a stilling pool.

The utility model is implemented by the following technical scheme that the drainage structure of the bottom plate of the stilling pool comprises a stilling pool guide wall, stilling pool tail sills and stilling pool bottom plates, wherein drainage galleries are arranged in the stilling pool guide wall and the stilling pool tail sills, one end of a PVC drainage pipe is arranged in the stilling pool bottom plate, the other end of the PVC drainage pipe extends into the drainage galleries,

the bottom plate of the stilling pool is divided into three layers, an upper layer and a lower layer are respectively a normal concrete upper layer and a normal concrete lower layer,

the middle layer is a permeable concrete layer, a transverse seam and a longitudinal seam are arranged between two adjacent stilling pool bottom plates, copper sheet water stops and rubber water stops are arranged in the transverse seam and the longitudinal seam, the copper sheet water stops are positioned in a normal concrete upper layer, and the rubber water stops are positioned in a normal concrete lower layer;

foundation drain holes are drilled in advance from the permeable concrete layer to the foundation.

In the technical scheme, the method comprises the following steps: the PVC drain pipe is arranged in the permeable concrete layer.

In the technical scheme, the method comprises the following steps: the thickness of the permeable concrete layer is not less than 10 cm, the porosity of the permeable concrete layer is 10% -20%, and the permeability of the permeable concrete layer is not less than 1mm/s.

In the technical scheme, the method comprises the following steps: the diameter of the basic drainage hole is 91 mm and the basic drainage hole penetrates into a rock body, the whole basic drainage hole is arranged in a quincuncial shape, the interval between the basic drainage hole and the rock body can be selected between 2 m and 5m according to the water permeability of bedrock, a drainage blind pipe is embedded in the basic drainage hole, and the non-woven geotechnical cloth is wrapped outside the drainage blind pipe.

In the technical scheme, the method comprises the following steps: the foundation drainage holes are arranged in a staggered manner with the transverse seam and the longitudinal seam.

Compared with the prior art that the drainage blind drain is arranged below the bottom plate of the stilling pool and the drainage structures such as the open drainage holes are arranged on the bottom plate of the stilling pool, the utility model has the following advantages:

1. the construction is rapid and convenient, pouring of the bottom plate of the stilling pool is directly carried out after the stilling pool is excavated, and the excavation and backfilling of the detailed grooves are not needed.

2. The pervious concrete in the utility model spreads over the whole stilling pool bottom plate, has large drainage area, and can adjust the spacing of the foundation drainage holes according to the properties of different stilling pool foundations, thereby being suitable for different foundation conditions.

3. According to the utility model, the anti-clogging blind material is arranged in the foundation drain hole, the permeable concrete layer is not directly connected with the outside, and the risk of clogging of the drain channel is reduced.

4. In the operation process of the stilling pool, after the foundation drain hole is damaged and blocked, the foundation drain hole can be re-drilled on the stilling pool bottom plate, and the hole opening position above the permeable concrete layer is blocked, so that the foundation drain hole can be repaired.

5. The utility model has the advantages of convenient construction, safety, reliability and convenient maintenance.

Drawings

Figure 1 is a plan view of the stilling pool of the present utility model,

fig. 2 is a cross-sectional view of A-A in fig. 1.

FIG. 3 is a cross-sectional view of B-B in bitmap 1.

In the figure: the device comprises a stilling pool guide wall 1-1, stilling pool tail sills 1-2, transverse joints 1-3 and longitudinal joints 1-4; the drainage gallery comprises the following components, by weight, 2-1 parts of a drainage gallery, 2-2 parts of a PVC drainage pipe, 2-3 parts of a copper sheet water stop, 2-4 parts of a rubber water stop, 2-5 parts of a stilling pool bottom plate, 2-6 parts of a normal concrete upper layer, 2-7 parts of a permeable concrete layer, 2-8 parts of a normal concrete lower layer and 2-9 parts of a foundation drainage hole.

Detailed Description

The present utility model will be described in further detail below with reference to the attached drawings, and at the same time, advantages of the present utility model will become more apparent and readily appreciated by the explanation.

Referring to fig. 1-3: the utility model provides a stilling pool bottom plate drainage structure, it includes stilling pool guide wall 1-1, stilling pool tail bank 1-2 and stilling pool bottom plate 2-5, stilling pool guide wall 1-1 and stilling pool tail bank 1-2 in all be provided with drainage corridor 2-1, PVC drain pipe 2-2 one end is installed in stilling pool bottom plate 2-5, the other end stretches into in the drainage corridor 2-1 (more specifically PVC drain pipe 2-2 is pre-buried in stilling pool guide wall 1-1 and stilling pool tail bank 1-2, one end extends to stilling pool guide wall 1-1 or stilling pool tail bank 1-2 and stilling pool bottom plate 2-5 seam department, the other end extends to in the drainage corridor 2-1), PVC drain pipe 2-2 diameter, the interval is fixed according to the flow size is synthesized, diameter optional phi 100. The overall thickness of the stilling pool bottom plates 2-5 is determined according to the anti-floating calculation of the stilling pool bottom plates of different scales.

The bottom plate of the stilling pool is divided into three layers, namely an upper normal concrete layer 2-6 and a lower normal concrete layer 2-8,

the middle layer is a permeable concrete layer 2-7, a transverse seam 1-3 and a longitudinal seam 1-4 are arranged between two adjacent stilling pool bottom plates 2-5, copper sheet water stop belts 2-3 and rubber water stop belts 2-4 are arranged in the transverse seam 1-3 and the longitudinal seam 1-4, the copper sheet water stop belts 2-3 are positioned in a normal concrete upper layer 2-6, and the rubber water stop belts 2-4 are positioned in a normal concrete lower layer 2-8;

foundation drain holes 2-9 are drilled in advance from the permeable concrete layer 2-7 to the foundation of the ground.

One end of the PVC drain pipe 2-2 is arranged in the permeable concrete layer 2-7. Can ensure that the groundwater can be well led and discharged into the drainage gallery 2-1.

The thickness of the permeable concrete layer 2-7 is not less than 10 cm, the porosity of the permeable concrete layer 2-7 is 10% -20%, and the permeability is not less than 1mm/s. The water permeability of the pervious concrete is ensured to meet the drainage requirement.

The diameter of the foundation drainage hole 2-9 is 91 mm and the foundation drainage hole is deep into a rock body, the whole foundation drainage hole 2-9 is arranged in a quincuncial shape, the interval between the foundation drainage hole 2-9 and the quincuncial arrangement can be selected between 2-5m according to the water permeability of bedrock, the foundation drainage hole 2-9 is internally embedded with a drainage blind pipe, the drainage blind pipe is wrapped with non-woven geotextile, and a geomembrane is paved at the top of the foundation drainage hole 2-9 when the normal concrete upper layer 2-6 is poured, so that the drainage hole is prevented from being blocked.

The foundation drainage holes 2-9 are arranged in a staggered manner with the transverse slits 1-3 and the longitudinal slits 1-4. Prevent the damage of the water stop belts 2-3 and 2-4 caused by the construction of the foundation drainage holes 2-9.

Groundwater under the bottom plate 2-5 of the stilling pool is led to drain into the stilling pool guide wall 1-1 on two sides of the stilling pool and the drainage gallery 2-1 in the stilling pool tail sill 1-2 through the foundation drainage hole 2-9 and the permeable concrete layer 2-7 by the PVC drainage pipe 2-2.

The utility model also comprises the following concrete construction processes: in the construction process, after the absorption basin is excavated, firstly, pouring a normal concrete lower layer 2-8 on a absorption basin bottom plate 2-5, setting a rubber water stop belt 2-4 on the normal concrete lower layer 2-8, pouring a permeable concrete layer 2-7 in the middle layer after the strength of the normal concrete lower layer 2-8 meets the requirement, constructing a foundation drain hole 2-9 after the strength of the permeable concrete layer 2-7 meets the requirement, and finally, pouring a normal concrete upper layer 2-6, and setting a copper sheet water stop belt 2-3 on the normal concrete upper layer 2-6.

The parts not described in detail above are all prior art.

Claims

1. A drainage structure of a stilling pool bottom plate comprises stilling pool guide walls (1-1), stilling pool tail sills (1-2) and stilling pool bottom plates (2-5), wherein drainage galleries (2-1) are arranged in the stilling pool guide walls (1-1) and the stilling pool tail sills (1-2), one end of a PVC drain pipe (2-2) is arranged in the stilling pool bottom plates (2-5), the other end of the PVC drain pipe extends into the drainage galleries (2-1),

the bottom plate (2-5) of the stilling pool is divided into three layers, an upper layer (2-6) of normal concrete and a lower layer (2-8) of normal concrete respectively,

the method is characterized in that: the middle layer is a permeable concrete layer (2-7), a transverse seam (1-3) and a longitudinal seam (1-4) are arranged between two adjacent stilling pool bottom plates (2-5), copper sheet water stops (2-3) and rubber water stops (2-4) are arranged in the transverse seam (1-3) and the longitudinal seam (1-4), the copper sheet water stops (2-3) are positioned in a normal concrete upper layer (2-6), and the rubber water stops (2-4) are positioned in a normal concrete lower layer (2-8);

foundation drainage holes (2-9) are drilled in advance from the permeable concrete layer (2-7) to the foundation.

2. A stilling pool floor drain as claimed in claim 1, wherein: one end of the PVC drain pipe (2-2) is arranged in the permeable concrete layer (2-7).

3. A stilling pool floor drain according to claim 1 or 2, wherein: the thickness of the permeable concrete layer (2-7) is not less than 10 cm, the porosity of the permeable concrete layer (2-7) is 10% -20%, and the water permeability is not less than 1mm/s.

4. A stilling pool floor drain according to claim 3, wherein: the diameter of the basic drain hole (2-9) is 91 mm and the basic drain hole penetrates into a rock body, the basic drain hole (2-9) is integrally arranged in a quincuncial shape, the arrangement distance between the basic drain hole and the basic drain hole can be selected between 2-5m according to the water permeability of bedrock, a drain blind pipe is embedded in the basic drain hole (2-9), and the drain blind pipe is wrapped with non-woven geotechnical cloth.

5. The stilling pool floor drain according to claim 4, wherein: the foundation drainage holes (2-9) are arranged in a staggered manner with the transverse slits (1-3) and the longitudinal slits (1-4).