CN111424730B - Comb flow tooth device for resisting scouring of heavy-duty railway bridge pier column foundation - Google Patents
Comb flow tooth device for resisting scouring of heavy-duty railway bridge pier column foundation Download PDFInfo
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- CN111424730B CN111424730B CN202010189726.XA CN202010189726A CN111424730B CN 111424730 B CN111424730 B CN 111424730B CN 202010189726 A CN202010189726 A CN 202010189726A CN 111424730 B CN111424730 B CN 111424730B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/06—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against corrosion by soil or water
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- 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
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Abstract
The invention relates to a flow combing tooth device for resisting scouring of a bridge pier stud foundation of a heavy haul railway, and belongs to the technical field of bridge reinforcement. The device comprises comb flow teeth, an L-shaped loading plate and a rhombic grating; the L-shaped loading plate is embedded in the foundation and the river bed, the rear end of a horizontal plate of the L-shaped loading plate is embedded in the foundation of the bridge pier stud, and the front end of the L-shaped loading plate embedded in the river bed is bent downwards to form a vertical plate; the comb flow teeth are arranged on the bridge piers and the upstream side of the foundation, which is washed by water flow, in a layered and staggered manner; the rhombic grids are tightly attached to the outer side of the vertical plate of the L-shaped loading plate and are also embedded in the riverbed; along the upstream direction of the pier, each layer of comb flow teeth are arranged in a staggered mode, the opening angle of the comb flow teeth is gradually increased, and the space between the teeth is gradually reduced. The invention effectively avoids the problem that the bridge pier and the foundation are eroded, and plays a role in protecting the riverbed.
Description
Technical Field
The invention relates to a flow combing tooth device for resisting scouring of a bridge pier stud foundation of a heavy haul railway, and belongs to the technical field of bridge reinforcement.
Background
The bridge is used as an important traffic main road and has irreplaceable effect on the development of the society. In recent years, with the development of economy in China, higher requirements are put forward on the traffic operation capacity, and more river-crossing and river-crossing bridges are built in order to guarantee the stable improvement of the traffic operation capacity. Many river-crossing and river-crossing bridges mostly adopt pile foundations which have long histories and are widely applied, and the self weight of a structure object on the upper part of a bridge pile foundation and external loads are transmitted to a deeper bottom bed bearing layer through the pile foundations. The safety and stability of the bridge pile foundation in the complex water flow environment depend on the stress condition of the bridge pile foundation in the complex water environment, and are further related to the reduction of the bearing capacity of the pile foundation caused by the shallow foundation burial depth caused by water flow scouring.
Many cross river and stride bridge of river construction because the washing away of rivers not only can lead to the underwater structure of bridge to receive the erosion, also can cause pier, basic buried depth to reduce simultaneously, leads to the pile foundation to expose for the pile foundation is damaged more easily, can lead to pier slope even, collapses, has very big adverse effect to bridge safety. The bridge damage case caused by insufficient foundation burial depth is one of a plurality of water damages with more occurrence and more serious consequences. At present, part of bridge structures are seriously scoured to cause adverse effects on driving safety, and although various measures such as speed limitation are adopted, the transportation capacity is seriously influenced, so that the research on the influence of flood scouring on the bridge and the research on scouring protection measures are particularly urgent for ensuring the safe and smooth running of heavy-load transportation and the safety of the bridge structures.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the flow combing tooth device for resisting scouring of the bridge pier foundation of the heavy haul railway, which can effectively improve the scouring resistance of the bridge pier foundation. The bridge across rivers adopts this kind of device, can increase substantially bridge foundation resistance to erodeing to improve the operation security of bridge.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a flow combing tooth device for resisting scouring of a bridge pier stud foundation of a heavy haul railway comprises flow combing teeth, an L-shaped loading plate and a rhombic grating; the L-shaped loading plate is embedded in the foundation and the river bed, the rear end of a horizontal plate of the L-shaped loading plate is embedded in the foundation of the bridge pier stud, and the front end of the L-shaped loading plate embedded in the river bed is bent downwards to form a vertical plate, so that the L-shaped loading plate is prevented from being lifted due to overlarge water flow velocity, and then the combing teeth are prevented from being damaged; the comb flow teeth are arranged on the pier and the upstream side of the foundation, which are washed by water flow, in a layered and staggered manner, and each comb flow tooth is vertically welded with the horizontal plate of the L-shaped loading plate; the rhombic grids are tightly attached to the outer side of the vertical plate of the L-shaped loading plate and are also embedded in the riverbed; along the direction from the upstream to the pier, each layer of comb flow teeth are arranged in a staggered mode, the opening angle of the comb flow teeth is gradually increased, and the space between the comb flow teeth is gradually reduced, so that water flow is divided layer by layer in the process of flowing from the upstream to the pier, and the purposes of reducing the flow speed, reducing the silt carrying capacity and reducing the flow speed of impacting the pier body are achieved; the depth of the L-shaped loading plate in the riverbed is more than 20% of the whole height of the combing teeth, so that the phenomenon of instability of the combing teeth under a high flow speed state is prevented.
Furthermore, the comb teeth are bent plates made of stainless steel materials, the thickness of the bent plates is more than 2mm, the opening angle is 60-150 degrees, and the space between the teeth on the bent plates is 1-10 cm;
furthermore, the distance between adjacent comb flow teeth on the same layer is 2cm-6cm, the distance between adjacent comb flow teeth on the two layers is 0.5m-2.0m, and the required number and the arrangement range of the comb flow teeth on each layer are determined according to the water flow velocity, the riverbed geology and the water-facing area condition of the bridge piers.
Further, the L-shaped loading plate is made of stainless steel; the rhombic grids are made of basalt fibers.
Furthermore, when the comb flow teeth are impacted by water flow, the comb flow teeth are opened at a certain angle, so that the water flow can be guided to the two sides of the comb flow teeth layer by layer, and the bridge piers and the foundation are prevented from being washed by the water flow. When the combing teeth are impacted by water flow, one thick and strong water flow is gradually divided into a plurality of fine water flows layer by layer due to the teeth with different intervals, the flow velocity of the water flow is reduced due to energy loss in the process of passing through the combing teeth, and the pier column and the foundation are effectively prevented from being subjected to powerful erosion action. When the comb flow teeth are impacted by water flow, the silt carried by the water flow is deposited due to the layer-by-layer blocking of the comb flow teeth, and the problem that the foundation is scoured is fundamentally solved. The loading plate and the rhombic grating are superposed and embedded in the riverbed; when water flow impacts the L-shaped loading plate, the vertical plate formed by bending the end part downwards and the rhombic grids arranged on the outer layer of the vertical plate can prevent the L-shaped loading plate from being lifted by the water flow, and meanwhile, the river bed covered by the rhombic grids is protected, and water flow scouring is prevented.
Further, the downward bending depth of the ends of the L-shaped loading plate and the diamond-shaped grating is determined by the general scouring depth; the size of the openings of the rhombic grating is determined according to the flow rate of water flow and the general scouring depth.
By adopting the technical scheme, the following beneficial effects are produced:
in the invention, when the comb flow teeth fixed on the loading plate are impacted by water flow, the comb flow teeth are opened at a certain angle, so that the water flow can be guided to two sides of the comb flow teeth, and finally, part of the water flow is guided out of the washing range of the pier column and the foundation through a row of comb flow teeth; when the comb teeth guide the water flow to two sides, part of the water flow is divided into smaller and smaller small water flows by the openings with different intervals, and the flow velocity of the water flow is reduced due to energy loss in the process, so that the pier and the foundation are effectively prevented from being subjected to powerful erosion; because the flow velocity of water flow is reduced under the action of the combing teeth, the sand carrying capacity is also reduced, and a large amount of sand is accumulated near the pier column and the foundation, the problem that the foundation is washed away is fundamentally solved; the loading plate and the rhombic gratings which are pre-embedded in the riverbed can effectively prevent the loading plate from being lifted by water flow, and meanwhile, the loading plate and the rhombic gratings can also play a role in protecting the riverbed covered by the loading plate, so that the riverbed is prevented from being washed away by water flow.
Drawings
FIG. 1 is a front view of the present invention in use;
FIG. 2 is a side view of the present invention in use;
FIG. 3 is a top plan view of the present invention in use;
FIG. 4 is a detail view of a comb teeth of the present invention;
in the figure: 1-water surface; 2-bridge pier; 3-a base; 4-riverbed; 5-combing teeth; a 6-L shaped load plate; 7-a diamond-shaped grid; 8-opening angle; 9-interdental space.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The contents of the specific embodiments are not intended to limit the scope of the present invention.
As shown in fig. 1-4, the device for combing the flow teeth of the heavy haul railway bridge pier foundation against scouring of the heavy haul railway bridge pier foundation of the present embodiment includes combing teeth 5, an L-shaped loading plate 6 and a diamond-shaped grating 7. As shown in fig. 2, the L-shaped loading plate 6 is pre-embedded in the foundation 3 and the river bed 4, the rear end of the horizontal plate of the L-shaped loading plate 6 is embedded in the foundation 3 of the bridge pier stud, and the front end of the L-shaped loading plate embedded in the river bed 4 is bent downwards to form a vertical plate, so that the L-shaped loading plate 6 is prevented from being lifted due to the overlarge flow velocity of water, and the comb teeth 5 are prevented from being damaged. The plurality of comb teeth 5 are arranged on the upstream sides of the piers 2 and the foundation 3 which are washed by water flow in a layered and staggered mode, and each comb tooth 5 is vertically welded with a horizontal plate of the L-shaped loading plate 6. The diamond-shaped grating 7 is tightly attached to the outer side of the vertical plate of the L-shaped loading plate 6 and is also pre-buried in the river bed 4. As shown in fig. 3-4, along the upstream direction to the pier 2, each layer of the comb flow teeth 5 are arranged in a staggered manner, the opening angle 8 of the comb flow teeth 5 is gradually increased, and the inter-tooth space 9 is gradually reduced, so that the water flow is divided layer by layer in the process of flowing from the upstream direction to the pier 2, and the purposes of reducing the flow speed, reducing the silt carrying capacity and reducing the flow speed of impacting the pier body are achieved. The L-shaped loading plate 6 is embedded in the riverbed 4 to a depth which is more than 20% of the whole height of the combing teeth 5, so that the phenomenon of instability of the combing teeth 5 under a high flow speed state is prevented.
In the embodiment, the comb teeth 5 are bent plates made of stainless steel materials, the thickness of the bent plates is 5mm, the opening angle is gradually increased between 60 degrees and 150 degrees, and the space 9 between the teeth on the bent plates is gradually reduced between 1cm and 10 cm. The distance between adjacent comb flow teeth 5 on the same layer is 2cm-6cm, the distance between adjacent comb flow teeth 5 on the two layers is 0.5m-2.0m, and the required number and the arrangement range of the comb flow teeth 5 on each layer are specifically determined according to the water flow velocity, the riverbed geology and the water-facing area condition of the bridge piers. Further, the L-shaped loading plate 6 is made of stainless steel. The material of the rhombic grids 7 is basalt fiber.
The working principle of the invention is as follows: when the comb teeth 5 are impacted by water flow, the comb teeth are opened at a certain angle, so that the water flow can be guided to the two sides of the comb teeth layer by layer, and the bridge piers 2 and the foundation 3 are prevented from being washed by the water flow. When the comb teeth 5 are impacted by water flow, one thick water flow is gradually divided into a plurality of fine water flows layer by layer due to the teeth with different intervals, the flow velocity of the water flow is reduced due to energy loss in the process of passing through the comb teeth 5, and the pier column 2 and the foundation 3 are effectively prevented from being subjected to powerful erosion action. When the comb teeth 5 are impacted by water flow, the silt carried by the water flow is deposited due to the layer-by-layer blocking of the comb teeth 5, and the problem that the foundation 3 is scoured is fundamentally solved. The loading plate 6 and the rhombic grating 7 are superposed and pre-buried in the riverbed 4. When water flow impacts the L-shaped loading plate 6, the vertical plate formed by bending the end part downwards and the rhombic grating 7 arranged on the outer layer of the vertical plate can prevent the L-shaped loading plate 6 from being lifted by the water flow, and simultaneously, the river bed 4 covered by the rhombic grating 7 is protected to prevent water flow from washing.
The invention can be applied to all heavy-duty railway bridges crossing rivers, can improve the anti-scouring capability of the bridge, and can accumulate the silt carried by the water flow near the bridge piers and the foundation, thereby effectively protecting the bridge piers and the foundation and ensuring the safe operation of the bridge. The invention has simple design and manufacture, can be designed and installed along with the riverbed backfilling progress in the bridge construction process, and does not influence the normal construction process of the bridge.
The size opening angle of the comb flow teeth, the space between the teeth and the arrangement quantity are determined according to the river depth, the water flow speed, the riverbed geological condition and the sizes of piers and foundations. The depth of the L-shaped load plate 6 and the end kickdown of the diamond shaped grate is determined by the general depth of the scour. The size of the openings of the rhombic grating is determined according to the flow rate of water flow and the general scouring depth.
The above-mentioned embodiments are only given for the purpose of more clearly illustrating the technical solutions of the present invention, and are not meant to be limiting, and variations of the technical solutions of the present invention by those skilled in the art based on the common general knowledge in the art are also within the scope of the present invention.
Claims (9)
1. The utility model provides a heavy haul railway bridge pier stud basis resists comb flow tooth device that erodees which characterized in that: comprises comb teeth (5), an L-shaped loading plate (6) and a diamond-shaped grating (7); the L-shaped loading plate (6) is embedded in the foundation (3) and the river bed (4), the rear end of a horizontal plate of the L-shaped loading plate (6) is embedded in the foundation (3) of the bridge pier column, and the front end of the horizontal plate embedded in the river bed (4) is bent downwards to form a vertical plate, so that the L-shaped loading plate (6) is prevented from being lifted due to overlarge flow velocity of water flow, and the combing teeth (5) are prevented from being damaged; the plurality of combing teeth (5) are arranged on the upstream sides of the piers (2) and the foundation (3) which are washed by water flow in a layered and staggered manner, and each combing tooth (5) is vertically welded with a horizontal plate of the L-shaped loading plate (6); the rhombic grids (7) are tightly attached to the outer side of the vertical plate of the L-shaped loading plate (6) and are also pre-buried in the riverbed (4); along the direction from the upstream to the pier (2), each layer of comb flow teeth (5) are arranged in a staggered mode, the opening angle (8) of the comb flow teeth (5) is gradually increased, and the space (9) between the teeth is gradually reduced, so that water flow is divided layer by layer in the process of flowing from the upstream to the pier (2), and the purposes of reducing the flow speed, reducing the silt carrying capacity and reducing the flow speed of impacting a pier body are achieved; the depth of the L-shaped loading plate (6) in the riverbed (4) is more than 20% of the whole height of the combing teeth (5) so as to prevent the combing teeth (5) from being unstable under the condition of high flow speed.
2. The flow combing tooth device for resisting scouring of the heavy haul railway bridge pier stud foundation of claim 1, which is characterized in that: the comb teeth (5) are bent plates made of stainless steel materials, the thickness of the bent plates is larger than 2mm, the opening angle is 60-150 degrees, and the space (9) between the teeth is 1-10 cm.
3. The flow combing tooth device for resisting scouring of the heavy haul railway bridge pier stud foundation of claim 1, which is characterized in that: the distance between adjacent comb flow teeth (5) on the same layer is 2cm-6cm, the distance between adjacent comb flow teeth (5) on the two layers is 0.5m-2.0m, and the required number and the arrangement range of the comb flow teeth (5) on each layer are determined according to the water flow velocity, the riverbed geology and the water-facing area condition of the bridge piers.
4. The flow combing tooth device for resisting scouring of the heavy haul railway bridge pier stud foundation of claim 1, which is characterized in that: the L-shaped loading plate (6) is made of stainless steel material; the rhombic grids (7) are made of basalt fibers.
5. The flow combing tooth device for resisting scouring of the heavy haul railway bridge pier stud foundation according to any one of claims 1 to 4, which is characterized in that: when the comb flow teeth (5) are impacted by water flow, the comb flow teeth are opened at a certain angle, so that the water flow can be guided to the two sides of the comb flow teeth layer by layer, and the bridge piers (2) and the foundation (3) are prevented from being washed by the water flow.
6. The flow combing tooth device for resisting scouring of the heavy haul railway bridge pier stud foundation according to any one of claims 1 to 4, which is characterized in that: when the comb teeth (5) are impacted by water flow, a stout water flow is gradually divided into a plurality of fine water flows layer by layer due to the teeth with different intervals, the flow velocity of the water flow is reduced due to energy loss in the process of passing through the comb teeth (5), and the bridge pier (2) and the foundation (3) are effectively prevented from being subjected to strong erosion action.
7. The flow combing tooth device for resisting scouring of the heavy haul railway bridge pier stud foundation according to any one of claims 1 to 4, which is characterized in that: when the comb flow teeth (5) are impacted by water flow, the silt carried by the water flow is deposited due to the layer-by-layer blocking of the comb flow teeth (5), and the problem that the foundation (3) is scoured is fundamentally solved.
8. The flow combing tooth device for resisting scouring of the heavy haul railway bridge pier stud foundation according to any one of claims 1 to 4, which is characterized in that: the L-shaped loading plate (6) and the rhombic grating (7) are superposed and embedded in the riverbed (4); when water flow impacts the L-shaped loading plate (6), the vertical plate formed by bending the end part downwards and the rhombic grating (7) arranged on the outer layer of the vertical plate can prevent the L-shaped loading plate (6) from being lifted by the water flow, and meanwhile, the river bed (4) covered by the rhombic grating (7) is protected to prevent water flow from washing.
9. The flow combing tooth device for resisting scouring of the heavy haul railway bridge pier stud foundation according to any one of claims 1 to 4, which is characterized in that: the downward bending depth of the end parts of the L-shaped loading plate (6) and the rhombic grid (7) is determined by the common scouring depth; the size of the opening of the diamond-shaped grating (7) is determined according to the water flow rate and the general scouring depth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010189726.XA CN111424730B (en) | 2020-03-18 | 2020-03-18 | Comb flow tooth device for resisting scouring of heavy-duty railway bridge pier column foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010189726.XA CN111424730B (en) | 2020-03-18 | 2020-03-18 | Comb flow tooth device for resisting scouring of heavy-duty railway bridge pier column foundation |
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| Publication Number | Publication Date |
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| CN111424730A CN111424730A (en) | 2020-07-17 |
| CN111424730B true CN111424730B (en) | 2021-07-02 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115233744B (en) * | 2022-06-13 | 2024-01-19 | 郑州大学 | Sacrificial folded plate group for reducing scour of pier bearing platform |
| CN114991068B (en) * | 2022-06-14 | 2023-10-24 | 广西建工第五建筑工程集团有限公司 | Triangular built-in flood drainage triangular structure system and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1746431A (en) * | 2005-09-15 | 2006-03-15 | 上海交通大学 | Reducing and wash preventing method of artificial float |
| CN101469547A (en) * | 2007-12-25 | 2009-07-01 | 周升融 | Apparatus for preventing foundation from being tunneled |
| KR100982023B1 (en) * | 2008-03-14 | 2010-09-13 | 조덕래 | Apparatus for preventing scour on bridge pier foundation |
| US8348553B2 (en) * | 2010-06-01 | 2013-01-08 | Applied University Research, Inc. | Bridge pier and abutment scour preventing apparatus with vortex generators |
| CN103603267B (en) * | 2013-11-21 | 2015-06-24 | 同济大学 | Protective device with height-variable sacrificing piles against local scours to bridge pier foundation |
| CN107974932B (en) * | 2017-12-06 | 2019-08-13 | 四川建筑职业技术学院 | One kind is paddled bridge pier protection guard |
| CN108442326A (en) * | 2018-05-22 | 2018-08-24 | 同济大学 | A kind of means of defence sacrificed pile group and combine resistance pier footing local scour with river bottom protection jackstone |
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