CN109339006B - Efficient cone-type hydraulic power absorption well and construction method thereof - Google Patents
Efficient cone-type hydraulic power absorption well and construction method thereof Download PDFInfo
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- CN109339006B CN109339006B CN201811477984.7A CN201811477984A CN109339006B CN 109339006 B CN109339006 B CN 109339006B CN 201811477984 A CN201811477984 A CN 201811477984A CN 109339006 B CN109339006 B CN 109339006B
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 78
- 238000010276 construction Methods 0.000 title abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 13
- 239000010959 steel Substances 0.000 claims abstract description 13
- 238000005266 casting Methods 0.000 claims abstract description 4
- 230000008030 elimination Effects 0.000 claims abstract description 3
- 238000003379 elimination reaction Methods 0.000 claims abstract description 3
- 239000004567 concrete Substances 0.000 claims description 18
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 2
- 230000021715 photosynthesis, light harvesting Effects 0.000 abstract description 21
- 230000008901 benefit Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
- E02B8/06—Spillways; Devices for dissipation of energy, e.g. for reducing eddies also for lock or dry-dock gates
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Revetment (AREA)
Abstract
The invention discloses a high-efficiency cone-type hydraulic power absorption well and a construction method thereof, wherein the absorption well comprises a absorption well body, a pressure pipeline, a ballast and an absorption cone, the absorption well body is of a reinforced concrete structure, is of a cylinder type, is buried below the ground, is higher than the ground at the top of the well, is provided with an overflow weir, and is provided with a water outlet channel at the outer side of the overflow weir; the pressure pipeline horizontally penetrates the inner wall of the vertical elimination shaft, a 90-degree turning part is arranged, and an outlet of the turning part is vertically downward; the ballast is fixed with the inner wall of the vertical shaft through steel bars, and is formed by casting reinforced concrete, and the turning part passes through the ballast; the absorption cone is arranged in the center of the absorption well body, and the top of the absorption cone faces the outlet of the turning part. The invention is especially suitable for the energy dissipation of the water flow of the high-head pipeline, innovatively uses the cone structure to enable the water flow to diffuse, roll and rub along the cone, has the characteristics of high energy dissipation efficiency, less energy dissipation space, simple and reliable structure and the like, and has good popularization value and application prospect.
Description
Technical Field
The invention relates to a water conservancy building, in particular to a high-efficiency cone-type hydraulic power absorption well and a construction method thereof.
Background
The hydraulic absorption well body is a hydraulic building commonly used in water conservancy and hydropower and urban water supply, and is arranged at the tail end of pipeline water flow with large drop height for discharging water, water supply or flood discharge, so that the hydraulic absorption well body is required to be arranged for eliminating the energy of high-speed water flow, and the potential energy and kinetic energy of the pipeline water flow are safely released, so that the upstream water flow and the downstream water flow are properly connected, and the damage to the pipeline and the downstream building is avoided.
Conventional hydraulic absorption wells typically have an energy absorption baffle structure disposed within the well or a larger size, deeper absorption well chamber structure, which results in the following drawbacks:
(1) The defects of low energy dissipation efficiency, poor flow state of effluent water flow and the like exist;
(2) The structure is complex, the building size is large, and the installation and maintenance are inconvenient.
In view of this, there is an urgent need to improve the structure of the existing hydraulic absorption well body, so as to simplify the structure, improve the energy dissipation efficiency, and improve the flow state of the water flow.
Disclosure of Invention
The invention aims to solve the technical problems of low energy dissipation efficiency, poor flow state of water flow, complex structure and large size of a building of the existing hydraulic power absorption well body.
In order to solve the technical problems, the invention adopts the technical scheme that the high-efficiency cone-type hydraulic power absorption well comprises:
the stilling well body is of a reinforced concrete structure, is in a cylindrical shape, is buried below the ground, and has a top higher than the ground, wherein the top is provided with an overflow weir, and the outer side of the overflow weir is provided with a water outlet channel;
the pressure pipeline horizontally penetrates through the inner wall of the vertical elimination shaft, and is provided with a 90-degree turning part, and an outlet of the turning part is vertically downward;
the ballast is fixed with the inner wall of the vertical shaft through steel bars and is formed by casting reinforced concrete, and the turning part passes through the ballast;
the absorption cone is arranged in the center of the absorption well body, and the top of the absorption cone faces the outlet of the turning part.
In another preferred embodiment, the power dissipation cone adopts a steel shell, and comprises a welded power dissipation cone upper section and a power dissipation cone lower section, wherein concrete is poured inside the power dissipation cone.
In another preferred embodiment, the height of the well roof above the ground is 1.5-2.5 m.
In another preferred embodiment, the distance between the top of the relief cone and the outlet of the turn is 2-3 times the pipe diameter of the turn.
In another preferred embodiment, the corners between the bottom plate and the inner wall of the stilling well body are connected by adopting cambered surfaces.
The invention also provides a construction method of the high-efficiency cone-type hydraulic absorption well with the structure, which comprises the following steps:
s1, excavating a foundation, namely excavating a pit by using an excavator, reinforcing drainage of the pit, keeping the wall of the pit stable, arranging the foundation on sandy pebbles or bedrock, and paving 10cm thick C15 concrete as a foundation cushion layer of a stilling well body after the foundation surface is leveled;
s2, pouring reinforced concrete of the absorption well body, binding a bottom plate of the absorption well body and wall steel bars, pouring concrete, and vibrating and compacting;
s3, constructing a force absorption cone, hoisting the force absorption cone into a force absorption well body, and installing the force absorption cone in place in the center of a bottom plate of the force absorption well body;
s4, constructing a pressure pipeline and a press pier, binding press pier and girder pulling steel bars after the pressure pipeline is installed in place, and pouring press pier concrete to enable the stilling well body and the press pier to be connected and fixed into a whole;
s5, constructing the water outlet channel, pouring reinforced concrete of the bottom plate and the side wall of the water outlet channel, arranging a settlement joint at overflow weirs of the water outlet channel and the absorption well body, and arranging a rubber water stop belt in the settlement joint.
In another preferred embodiment, in step S3, the lower section of the absorption cone is lifted to the bottom plate of the absorption well body, and is installed in place, concrete is poured through the top orifice of the lower section of the absorption cone, and then the upper section of the absorption cone is lifted and welded and connected with the lower section.
Compared with the prior art, the invention is particularly suitable for the energy dissipation of the water flow of the high-head pipeline, innovatively uses the cone structure to enable the water flow to diffuse, roll and rub along the cone, has the characteristics of high energy dissipation efficiency, less energy dissipation space, simple and reliable structure and the like, and has good popularization value and application prospect.
Drawings
FIG. 1 is a front view of the present invention;
fig. 2 is a top view of the present invention.
Detailed Description
The invention provides a high-efficiency cone-type hydraulic power absorption well and a construction method thereof, which are particularly suitable for water flow energy dissipation of a high-water head pipeline, creatively apply cone structures to enable water flow to diffuse, roll and rub along cones, and have the characteristics of high energy dissipation efficiency, less energy dissipation space, simple and reliable structure and the like. The invention is described in detail below with reference to the drawings and the detailed description.
As shown in fig. 1 and 2, the high-efficiency cone hydraulic power absorption well provided by the invention comprises a power absorption well body 10, a pressure pipeline 20, a ballast 30 and a power absorption cone 40.
The stilling well body 10 is of a reinforced concrete structure, is cylindrical, is buried below the ground, is higher than the ground at the top of the well, is provided with an overflow weir crest 11 at the top of the well, and is provided with a water outlet channel 12 at the outer side of the overflow weir crest 11. To ensure stability of the stilling well 10 during high head, high flow rate operation, the main structure of the stilling well 10 is preferably buried below ground.
The pressure pipeline 20 horizontally penetrates the inner wall of the vertical shaft, and is provided with a 90-degree turning part 21, and the outlet of the turning part 21 is vertically downward. The ballast 30 is fixed to the inner wall of the vertical shaft through steel bars, and is formed by casting reinforced concrete, and the turning part 21 passes through the ballast 30. A relief cone 40 is provided in the centre of the relief well body 10, the top of which is facing the outlet of the turn 21.
The water flow enters the vertical well from the pressure pipeline 20 and passes through the turning part 21, the water flow vertically impacts the absorption cone 40, the water flow downwards spreads along the periphery of the absorption cone 40 and then upwards folds back from the bottom of the well, two opposite flushing water flows with opposite inner and outer directions are formed in the absorption well 10, a large number of irregular small vortex bodies are further formed by interdiffusion, the energy dissipation purpose is achieved, and the water flow after energy dissipation is discharged to the downstream water outlet channel 12 through the overflow weir mouth 11.
Preferably, the force dissipating cone 40 is a steel shell, comprising a welded upper section of the force dissipating cone and a lower section of the force dissipating cone, and concrete is poured inside the force dissipating cone 40. The concrete in the stilling cone 40 can greatly enhance the strength and stability of the stilling cone 40, and the stilling cone is divided into an upper section and a lower section, so that the construction and the concrete pouring are convenient.
Preferably, the height of the top of the well above the ground is 1.5-2.5 m, so that the overall operation of the stilling well body 10 under the impact of high-speed water flow is ensured to be stable, and vibration is avoided.
Preferably, the distance between the top of the relief cone 40 and the outlet of the turn 21 is 2-3 times the pipe diameter of the turn 21. This distance provides a certain flow rate of the water coming out of the turn 21 and, after a certain velocity, hits the top of the absorption cone 40, thus diverting and spreading the water evenly downwards.
Preferably, the corners between the bottom plate and the inner wall of the absorption well body 10 are connected by adopting cambered surfaces, and the cambered surfaces are connected so that water flow can impact upwards after reaching the bottom of the well, and then collide and roll with downward water flow, thereby achieving the purpose of efficient energy dissipation.
The invention also provides a construction method of the high-efficiency cone-type hydraulic absorption well with the structure, which comprises the following steps:
s1, excavating a foundation, namely excavating a pit by using an excavator, reinforcing drainage of the pit, keeping the pit wall stable, arranging the foundation on sandy pebbles or bedrock, and paving 10cm thick C15 concrete as a foundation cushion layer of the stilling well body 10 after the foundation surface is leveled;
s2, pouring reinforced concrete of the absorption well body 10, binding a bottom plate of the absorption well body 10 and wall steel bars, pouring concrete, vibrating and compacting, wherein the cement ratio of the concrete is required to be strictly controlled;
s3, constructing a relief cone 40, hoisting the relief cone into the relief well body 10, and installing the relief cone in place in the center of the bottom plate of the relief well body 10; the dimensions of the relief cone 40 may be designed according to actual needs;
s4, constructing the pressure pipeline 20 and the press block 30, binding the press block 30 and the girder-pulling steel bars after the pressure pipeline 20 is installed in place, and pouring the concrete of the press block 30 to ensure that the stilling well body 10 and the press block 30 are connected and fixed into a whole;
s5, constructing the water outlet channel 12, pouring reinforced concrete of the bottom plate and the side wall of the water outlet channel 12, arranging a settlement joint at overflow weirs of the water outlet channel 12 and the stilling well body 10, and arranging a rubber water stop belt in the settlement joint.
In step S3, the lower section of the absorption cone 40 is lifted to the bottom plate of the absorption well body 10, and is installed in place, concrete is poured through the top orifice of the lower section of the absorption cone, and then the upper section of the absorption cone is lifted and welded and connected with the lower section.
The hydraulic power absorption well body 10 provided by the invention has the following advantages:
1) The structure is simple: the main structure comprises three parts of a press block 30, a stilling well body 10 and a stilling cone 40, and the stilling well body 10 is taken as the center to combine the three parts into a whole, so that the structure is compact and simple;
2) High-efficiency energy dissipation: because two three-dimensional water flows with opposite flow directions are formed in the absorption well body 10 through the opposite flow diffusion of the absorption cone, the whole well is sufficiently opposite-flow rubbed, the purpose of high-efficiency energy dissipation is achieved, and example engineering shows that the energy dissipation effect is very effective, and the water outflow level after energy dissipation is stable;
3) The occupied space is small: because the ballast 30 and the stilling cone 40 are both arranged in the stilling well body 10, no other stilling workers are arranged, the arrangement is very compact, and the occupied space is small;
4) The construction cost is low: the energy dissipation device skillfully utilizes a simple cone structure to dissipate energy, has no conventional structures such as a conventional energy dissipation baffle, a conventional absorption chamber, a conventional absorption tank and the like, reduces the construction quantity of an energy dissipater, reduces the engineering investment, reduces the construction engineering investment by about 25-35% according to the same condition design comparison of the established engineering, and has good economic benefit.
The present invention is not limited to the above-mentioned preferred embodiments, and any person who can learn the structural changes made under the teaching of the present invention can fall within the scope of the present invention if the present invention has the same or similar technical solutions.
Claims (5)
1. A high efficiency cone hydraulic power absorption well, comprising:
the stilling well body is of a reinforced concrete structure, is in a cylindrical shape, is buried below the ground, and has a top higher than the ground, wherein the top is provided with an overflow weir, and the outer side of the overflow weir is provided with a water outlet channel;
the pressure pipeline horizontally penetrates through the inner wall of the vertical elimination shaft body, and is provided with a 90-degree turning part, and an outlet of the turning part is vertically downward; the ballast is fixed with the inner wall of the vertical shaft through steel bars and is formed by casting reinforced concrete, and the turning part passes through the ballast;
the absorption cone is arranged in the center of the absorption well body, and the top of the absorption cone is opposite to the outlet of the turning part;
the corner between the bottom plate and the inner wall of the absorption well body is connected by adopting an arc surface;
the power dissipation cone adopts a steel shell, and comprises a welded and fixed power dissipation cone upper section and a power dissipation cone lower section, wherein concrete is poured in the power dissipation cone.
2. A high efficiency cone hydraulic power absorption well according to claim 1, wherein the height of the well roof above the ground is 1.5-2.5 m.
3. A high efficiency cone hydraulic power absorption well according to claim 1, wherein the distance between the top of the power absorption cone and the outlet of the turning section is 2-3 times the pipe diameter of the turning section.
4. A method of constructing a high efficiency cone hydraulic power absorption well according to any one of claims 1 to 3, comprising the steps of:
s1, excavating a foundation, namely excavating a pit by using an excavator, reinforcing drainage of the pit, keeping the wall of the pit stable, arranging the foundation on sandy pebbles or bedrock, and paving 10cm thick C15 concrete as a foundation cushion layer of a stilling well body after the foundation surface is leveled;
s2, pouring reinforced concrete of the absorption well body, binding a bottom plate of the absorption well body and wall steel bars, pouring concrete, and vibrating and compacting;
s3, constructing a force absorption cone, hoisting the force absorption cone into a force absorption well body, and installing the force absorption cone in place in the center of a bottom plate of the force absorption well body;
s4, constructing a pressure pipeline and a press pier, binding press pier and girder pulling steel bars after the pressure pipeline is installed in place, and pouring press pier concrete to enable the stilling well body and the press pier to be connected and fixed into a whole;
s5, constructing the water outlet channel, pouring reinforced concrete of the bottom plate and the side wall of the water outlet channel, arranging a settlement joint at overflow weirs of the water outlet channel and the absorption well body, and arranging a rubber water stop belt in the settlement joint.
5. The method according to claim 4, wherein in step S3, the lower section of the absorption cone is lifted to the bottom plate of the absorption well body and is installed in place, concrete is poured through the top orifice of the lower section of the absorption cone, and then the upper section of the absorption cone is lifted and welded and connected with the lower section of the absorption cone.
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| CN201811477984.7A CN109339006B (en) | 2018-12-05 | 2018-12-05 | Efficient cone-type hydraulic power absorption well and construction method thereof |
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| CN201811477984.7A CN109339006B (en) | 2018-12-05 | 2018-12-05 | Efficient cone-type hydraulic power absorption well and construction method thereof |
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| CN109339006B true CN109339006B (en) | 2023-11-21 |
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| CN112431291B (en) * | 2020-11-28 | 2022-04-19 | 常州市排水管理处 | Large sewage pressure release drop well for relieving odor release |
| CN114382980A (en) * | 2022-01-25 | 2022-04-22 | 中工武大设计集团有限公司 | Energy dissipation pressure reduction structure and energy dissipation pressure reduction calculation method |
| CN115323998B (en) * | 2022-08-30 | 2024-01-23 | 扬州大学 | Oblique angle conduit diversion dissipating pier and asymmetric outflow coupling energy dissipation method |
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