CN115125905B - Self-flushing sand type river matrix and method for installing river matrix - Google Patents
Self-flushing sand type river matrix and method for installing river matrix Download PDFInfo
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- CN115125905B CN115125905B CN202210980087.8A CN202210980087A CN115125905B CN 115125905 B CN115125905 B CN 115125905B CN 202210980087 A CN202210980087 A CN 202210980087A CN 115125905 B CN115125905 B CN 115125905B
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- 239000011159 matrix material Substances 0.000 title claims abstract description 55
- 238000011010 flushing procedure Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000004576 sand Substances 0.000 title abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 68
- 238000009825 accumulation Methods 0.000 abstract description 3
- 238000005406 washing Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 11
- 239000013049 sediment Substances 0.000 description 5
- 230000001133 acceleration Effects 0.000 description 3
- 238000009991 scouring Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/02—Stream regulation, e.g. breaking up subaqueous rock, cleaning the beds of waterways, directing the water flow
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B1/00—Equipment or apparatus for, or methods of, general hydraulic engineering, e.g. protection of constructions against ice-strains
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/02—Stream regulation, e.g. breaking up subaqueous rock, cleaning the beds of waterways, directing the water flow
- E02B3/023—Removing sediments
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/52—Submerged foundations, i.e. submerged in open water
- E02D27/525—Submerged foundations, i.e. submerged in open water using elements penetrating the underwater ground
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Revetment (AREA)
Abstract
The invention relates to a self-sand-flushing type river matrix, which comprises a matrix main body and a speed-increasing flow guide piece fixed on the matrix main body, wherein the speed-increasing flow guide piece and a river bottom form a speed-increasing flow channel, and the back surface of the matrix main body is arranged in the speed-increasing flow channel. A method of installing a river matrix, comprising: the speed increasing guide piece is arranged on the base body, so that the speed increasing guide piece and the river bottom form a speed increasing flow channel, and the back surface of the base body is arranged in the speed increasing flow channel. The sand accumulation on the back water side of the matrix in the river can be washed by using the water-saving type sand washing machine.
Description
Technical Field
The invention relates to the technical field of foundation pile cap establishment in a river channel, in particular to a self-sand-flushing type river matrix and a method for installing the river matrix.
Background
When the transmission line spans a river, an iron tower is often required to be arranged in the river. Because the vertical tower in the river channel forms vortex, sediment is formed on the back surface of the bored concrete pile foundation, thereby leading to the elevation of the river bed and the water surface and affecting the flood safety of the river channel.
The existing scheme is that the diameter of a single cast-in-place pile is reduced, the pile spacing of the cast-in-place pile is increased, and the sand accumulation amount is reduced by reducing the blocking of water flow. However, the scheme needs to increase the number of the cast-in-place piles to make up for the defect of pile diameter and ensure the stability of the foundation. In addition, the increase of the pile spacing also leads to the increase of the size of the foundation bearing platform, so that the foundation investment of the river-crossing tower is kept high.
Patent document CN2758332 discloses a river channel sand disturbing dredging device, which consists of a water inlet funnel, a diversion funnel, a buoyancy tank, a flag, a water pipe, a sand flushing port, a rope tying ring, a steel wire rope and a rake, wherein the water inlet of the water inlet funnel is rectangular, the water outlet is circular, the water outlet is connected with the diversion funnel by using a flange, the other end of the diversion funnel is connected with the water pipe in an inserted manner, the cross sections of the diversion funnel and the water pipe are circular, the sand flushing port at the tail end of the water pipe is dragged on a river bed, the buoyancy tank is arranged at the upper part of the diversion funnel, the flag is arranged at the upper part of the buoyancy tank, the rope tying ring is welded at the lower part of the diversion funnel, one end of the steel wire rope is tied on the rope tying ring, the rake is flat, and the rake is provided with spikes at the upper surface and the lower surface. According to the technical scheme, the river bottom flow velocity is increased by utilizing the difference between the water surface flow velocity and the river bottom flow velocity, so that the scouring action of water flow on a river bed and the sediment transporting capacity of water flow are enhanced. However, because the bored concrete pile is solid, the river sediment disturbing and dredging device is not easy to be arranged to wash the sediment on the back surface of the bored concrete pile.
Disclosure of Invention
The invention aims to provide a self-sand-flushing type river matrix and a method for installing the river matrix so as to flush accumulated sand on the back water side of the river matrix.
The technical scheme of the invention is as follows:
The self-sand-flushing type river matrix comprises a matrix main body and a speed-increasing flow guide piece fixed on the matrix main body, wherein the speed-increasing flow guide piece and a river bottom form a speed-increasing flow channel, and the back surface of the matrix main body is arranged in the speed-increasing flow channel.
The matrix main body can be a pile body or a pier body.
Preferably, the bottom surface of the speed-increasing guide member is an arc surface, the central line of the arc surface is perpendicular to the river direction, on a vertical section determined by the river direction and the vertical direction, the vertical distance between the speed-increasing guide member and the river bottom is reduced along the river direction, and the speed-increasing guide member is submerged in water.
Preferably, the section of the speed increasing flow guiding member is arched in the direction perpendicular to the river.
Preferably, the bottom surface of the speed-increasing flow guiding element is a plane, on a vertical section determined by the river direction and the vertical direction, the vertical distance between the water facing edge of the speed-increasing flow guiding element and the river bottom is H 1, the vertical distance between the back water edge of the speed-increasing flow guiding element and the river bottom is H 2, and the water surface height of the back water side of the matrix main body is H 3,H1>H2 and H 3>H2.
Preferably, the matrix main body is a pile body, the pile bodies are multiple, and each pile body is fixedly provided with a speed-increasing flow guiding piece or is fixedly connected with at least two pile bodies.
A method of installing a river matrix, comprising:
The speed increasing guide piece is arranged on the base body, so that the speed increasing guide piece and the river bottom form a speed increasing flow channel, and the back surface of the base body is arranged in the speed increasing flow channel.
Preferably, the bottom surface of the speed-increasing guide member is an arc surface, the central line of the arc surface is perpendicular to the river direction, on a vertical section determined by the river direction and the vertical direction, the vertical distance between the speed-increasing guide member and the river bottom is reduced along the river direction, and the speed-increasing guide member is submerged in water.
Preferably, the section of the speed increasing flow guiding member is arched in the direction perpendicular to the river.
Preferably, the bottom surface of the speed-increasing flow guiding element is a plane, on a vertical section determined by the river direction and the vertical direction, the vertical distance between the water facing edge of the speed-increasing flow guiding element and the river bottom is H 1, the vertical distance between the back water edge of the speed-increasing flow guiding element and the river bottom is H 2, and the water surface height of the back water side of the matrix main body is H 3,H1>H2 and H 3>H2.
Preferably, the matrix main body is a pile body, the pile bodies are multiple, and each pile body is fixedly provided with a speed-increasing flow guiding piece or is fixedly connected with at least two pile bodies.
The principle of the invention is as follows: by the Bernoulli effect, the acceleration flow guide and the river bottom form an acceleration flow path, so that the flow velocity increases in the river direction of the water flow path, and the pressure at the interface where the object contacts the fluid decreases (boundary layer surface effect). The back surface of the matrix main body is arranged in the speed-increasing flow channel, and after the speed-increasing flow guide piece increases the flow speed of the back surface of the water flow channel, the impact force of the water flow in the water flow channel on the river bottom of the back surface of the matrix main body is larger, so that the accumulated sand on the back water side of the matrix in the river can be washed. If a pipeline is formed between the speed increasing flow guide piece and the river bottom, water outside the side wall of the pipeline cannot enter the speed increasing flow channel. If a side seam is arranged between the speed increasing flow guide piece and the river bottom, the water body can enter the speed increasing flow channel due to the initial speed of the water body in the river direction, and part of the water body in the speed increasing flow channel moves along the speed increasing flow channel to promote the water body in front to accelerate; and extruding part of water in the speed increasing runner from the side seam to obtain the speed increasing runner. Therefore, when the section of the speed-increasing flow guide piece is arched in the direction perpendicular to the river, the arched side wall can reduce the extrusion effect of the water body in the speed-increasing flow channel from the side seam, so that the Bernoulli effect can be enhanced. In addition, the difference between the water inlet area and the water outlet area of the speed increasing flow channel is increased, so that the Bernoulli effect can be enhanced.
The beneficial effects of the invention are as follows:
1. The accelerating guide piece and the river bottom form an accelerating flow channel, so that the flow speed in the river direction of the accelerating flow channel can be increased, and the side pressure of the accelerating flow channel can be reduced. The back surface of the matrix main body is arranged in the speed increasing flow channel, and after the speed increasing flow guide piece increases the flow velocity of the back surface of the speed increasing flow channel, the impact force of the water flow in the speed increasing flow channel on the river bottom of the back surface of the matrix main body is larger, so that the accumulated sand on the back water side of the matrix in the river can be washed.
2. The bottom surface of the speed-increasing flow guiding piece is an arc surface, the central line of the arc surface is perpendicular to the river direction, the vertical distance between the speed-increasing flow guiding piece and the river bottom is reduced along the river direction on the vertical section determined by the river direction and the vertical direction, and the speed-increasing flow guiding piece is submerged in water. Therefore, the difference between the area of the water inlet and the area of the water outlet of the speed increasing flow channel can be increased, the Bernoulli effect is enhanced, and the scouring effect is better.
3. When the section of the speed-increasing flow guide piece is arched in the direction perpendicular to the river, the arched side wall can reduce the extrusion effect of the water body in the speed-increasing flow channel from the side seam, so that the Bernoulli effect can be enhanced. Therefore, the scouring effect is better.
4. Each pile body is fixedly provided with a speed-increasing guide piece, so that the speed-increasing guide piece is convenient to install.
5. One speed increasing guide piece is fixedly connected with at least two pile bodies, so that the speed increasing guide piece is convenient to fix.
6. The accelerating guide piece and the river bottom form an accelerating flow channel, so that the flow speed in the river direction of the accelerating flow channel can be increased, and the side pressure of the accelerating flow channel can be reduced. The back surface of the matrix main body is arranged in the speed increasing flow channel, and after the speed increasing flow guide piece increases the flow velocity of the back surface of the speed increasing flow channel, the impact force of the water flow in the speed increasing flow channel on the river bottom of the back surface of the matrix main body is larger, so that the accumulated sand on the back water side of the matrix in the river can be washed.
Drawings
Fig. 1 is a front view of a pylon installed on a river bottom.
Fig. 2 is a side view of a pylon installed on a river bottom.
The reference numerals indicate that 10-river, 11-river, 20-pile body, 21-base, 22-tower seat, 23-tower body and 3-speed increasing guide piece.
Detailed Description
The present invention is described in the following embodiments in conjunction with the accompanying drawings to assist those skilled in the art in understanding and implementing the invention. The following examples and technical terms therein should not be construed to depart from the technical knowledge of the art unless otherwise indicated.
Referring to fig. 1-2, a power transmission tower installed on a river bottom includes a plurality of piles 20 installed on the river bottom, a foundation 21 constructed at an upper end of the piles 20, a tower base 23 constructed on the foundation 21, and a tower body 23 installed on the tower base 22. The pile body 20 may be a precast pile or a cast-in-place pile. When river water flows through the pile body 20, vortex is formed on the back surface of the pile body 20, and sediment accumulation is formed on the back surface of the pile body due to the vortex, so that a river bed and the water surface are lifted, and the river flood safety is affected.
The self-sand-flushing type river matrix comprises a matrix main body and a speed-increasing guide piece fixed on the matrix main body, wherein the speed-increasing guide piece and a river bottom form a speed-increasing runner, and the back surface of the matrix main body is arranged in the speed-increasing runner.
Wherein, the bottom of the matrix main body is connected with the river bottom, or part of the matrix main body is inserted into the river bottom in a sinking way. In general, the pile body can be a pile body or a pier body.
In physics, the reason for the speed-increasing flow channel is that the flow channel is a necked-down flow channel, which is generally formed by a necked-down duct. However, by combining the principle of the self-sand-flushing type river matrix, when a side seam is arranged between the accelerating guide piece and the river bottom, as the initial speed of the water body in the river direction exists, the water body can enter the accelerating flow channel, and part of the water body in the accelerating flow channel moves along the accelerating flow channel to accelerate the water body in front; and extruding part of water in the speed increasing runner from the side seam to obtain the speed increasing runner. The bernoulli effect also occurs.
Example 1: the self-sand-flushing type river matrix comprises a pile body 20 and a speed-increasing guide piece 3 fixed on the pile body 20, wherein the speed-increasing guide piece 3 and a river bottom form a speed-increasing runner, and the back surface of the pile body 20 is arranged in the speed-increasing runner.
In this embodiment, the bottom surface of the speed-increasing guide member 3 is a cambered surface. Referring to fig. 1-2, one preferred arrangement is: the central line of the cambered surface is parallel to the river bottom and perpendicular to the river direction. On the vertical section determined by the river direction and the vertical direction, the vertical distance between the accelerating guide piece and the river bottom is reduced along the river direction.
Referring to fig. 1, in the present embodiment, the bottom surface of the speed increasing deflector 3 is submerged under the water surface.
In this embodiment, there are a plurality of pile bodies 20, and one speed-increasing flow guiding member 3 is fixedly connected with at least two pile bodies 20. Thus, the speed-increasing guide piece is convenient to fix.
In other embodiments, a speed increasing deflector 3 may be fixed to each pile 20. Thus facilitating the installation of the speed increasing flow guide.
In other embodiments, the bottom surface of the speed increasing deflector 3 may be planar. The preferred setting mode is as follows: on the vertical section determined by the river direction and the vertical direction, the vertical distance between the water facing edge of the speed increasing guide piece and the river bottom is H 1, the vertical distance between the water backing edge of the speed increasing guide piece and the river bottom is H 2, the water surface height of the water backing side of the matrix main body is H 3,H1>H2, and H 3>H2.
In other embodiments, the cross-section of the acceleration deflector may be arched in a direction perpendicular to the river.
Example 2: a method for installing a river matrix comprises the following steps:
After the base body is fixed on the river bottom, the speed-increasing guide piece is arranged on the base body, so that the speed-increasing guide piece and the river bottom form a speed-increasing flow channel, and the back surface of the base body is arranged in the speed-increasing flow channel.
The bottom surface of the speed increasing guide member 3 may be an arc surface. Referring to fig. 1-2, one preferred arrangement is: the central line of the cambered surface is parallel to the river bottom and perpendicular to the river direction. On the vertical section determined by the river direction and the vertical direction, the vertical distance between the accelerating guide piece and the river bottom is reduced along the river direction.
In use, the bottom surface of the speed increasing deflector 3 is preferably submerged below the water surface.
If the base body is a pile body 20, there are a plurality of base bodies. One speed increasing and guiding piece 3 is fixedly connected with at least two pile bodies 20. Thus, the speed-increasing guide piece is convenient to fix. A speed increasing deflector 3 may be fixed to each pile 20. Thus facilitating the installation of the speed increasing flow guide.
The bottom surface of the speed increasing guide member 3 may be a plane. The preferred setting mode is as follows: on the vertical section determined by the river direction and the vertical direction, the vertical distance between the water facing edge of the speed increasing guide piece and the river bottom is H 1, the vertical distance between the water backing edge of the speed increasing guide piece and the river bottom is H 2, the water surface height of the water backing side of the matrix main body is H 3,H1>H2, and H 3>H2.
The section of the speed increasing guide member can also be arched in the direction perpendicular to the river.
The invention is described in detail above with reference to the drawings and examples. It should be understood that the description of all possible embodiments is not intended to be exhaustive or to limit the inventive concepts disclosed herein to the precise form disclosed. The technical characteristics of the above embodiments are selected and combined, specific parameters are experimentally changed by those skilled in the art, or the technical means disclosed in the present invention are conventionally replaced by the prior art in the technical field, which is not paid with creative work, and all the specific embodiments are implicitly disclosed in the present invention.
Claims (3)
1. The self-sand-flushing type river matrix comprises a matrix main body and is characterized by further comprising a speed-increasing flow guide piece fixed on the matrix main body, wherein the speed-increasing flow guide piece and a river bottom form a speed-increasing flow channel, and the back surface of the matrix main body is arranged in the speed-increasing flow channel; the bottom of the matrix main body is connected with the river bottom, or part of the matrix main body is inserted into the river bottom in a sinking manner;
The bottom surface of the speed-increasing flow guide piece is an arc surface, the central line of the arc surface is parallel to the river bottom and perpendicular to the river direction, and on a vertical section determined by the river direction and the vertical direction, the vertical distance between the speed-increasing flow guide piece and the river bottom is reduced along the river direction, and the speed-increasing flow guide piece is submerged in water; the section of the speed-increasing flow guide piece is arched in the direction perpendicular to the river;
The matrix main body is a pile body, a plurality of pile bodies are arranged, and each pile body is fixedly provided with a speed-increasing flow guide piece or a speed-increasing flow guide piece is fixedly connected with at least two pile bodies; the pile body is completely immersed in water.
2. A method for installing a river matrix, comprising: the method comprises the steps of installing a speed increasing guide piece on a base body, enabling the speed increasing guide piece and a river bottom to form a speed increasing flow channel, and enabling the back surface of the base body to be arranged in the speed increasing flow channel;
The bottom surface of the speed-increasing flow guiding piece is an arc surface, the central line of the arc surface is perpendicular to the river direction, the vertical distance between the speed-increasing flow guiding piece and the river bottom is reduced along the river direction on the vertical section determined by the river direction and the vertical direction, and the speed-increasing flow guiding piece is submerged in water; and in the direction vertical to the river, the section of the speed-increasing flow guide piece is arched.
3. The method for installing a river matrix according to claim 2, wherein the matrix body is a plurality of piles, and one speed increasing guide member is fixed on each pile, or one speed increasing guide member is fixedly connected with at least two piles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210980087.8A CN115125905B (en) | 2022-08-16 | 2022-08-16 | Self-flushing sand type river matrix and method for installing river matrix |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210980087.8A CN115125905B (en) | 2022-08-16 | 2022-08-16 | Self-flushing sand type river matrix and method for installing river matrix |
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| CN115125905B true CN115125905B (en) | 2024-07-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103485307A (en) * | 2013-09-30 | 2014-01-01 | 苏州大学 | Water stop device |
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| JP4669899B2 (en) * | 2009-03-24 | 2011-04-13 | 啓壽 久保木 | Structure for water flow acceleration |
| CN203229922U (en) * | 2013-04-25 | 2013-10-09 | 中国水利水电科学研究院 | Device for driving deposited sediments of river channels to be redistributed |
| CN106640497A (en) * | 2016-12-06 | 2017-05-10 | 天津大学前沿技术研究院有限公司 | Breakwater wave power generation device with optimized structure |
| CN207933983U (en) * | 2017-08-15 | 2018-10-02 | 汕头市德柏智能科技有限公司 | A kind of intelligent chute of hydraulic engineering |
| CN109468999A (en) * | 2018-11-03 | 2019-03-15 | 垠星建设有限公司 | A kind of reservoir desilting method |
| CN111996984B (en) * | 2020-08-24 | 2024-08-23 | 上海市政工程设计研究总院（集团）有限公司 | Flood control device with flood control and flood control functions and method for constructing deep pool shoal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103485307A (en) * | 2013-09-30 | 2014-01-01 | 苏州大学 | Water stop device |
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