CN215925602U

CN215925602U - Pier protection device capable of reducing local scouring

Info

Publication number: CN215925602U
Application number: CN202121600948.2U
Authority: CN
Inventors: 陈辉煌; 陈泽富; 尹智勇; 陈文萍; 刘咏梅; 田刚; 熊志刚; 侯佳俊; 周琪; 马敏
Original assignee: Third Engineering Co Ltd of China Railway 23rd Bureau Group Co Ltd
Current assignee: Third Engineering Co Ltd of China Railway 23rd Bureau Group Co Ltd
Priority date: 2021-07-14
Filing date: 2021-07-14
Publication date: 2022-03-01
Anticipated expiration: 2031-07-14

Abstract

The utility model relates to the technical field of pier safety protection, in particular to a pier protection device for reducing local scouring. Through set up the spoiler between two adjacent piers transversely laid along the river course, the spoiler receives rivers impact and produces horizontal swirl, and the rivers are concentrated in the upset to influence the formation of horseshoe vortex and wake vortex, make the pier receive the influence reduction that local erodees, thereby protection pier. The spoiler is low in manufacturing cost and short in bridge pier distance of the temporary construction trestle, and therefore the spoiler is suitable for protection of the temporary construction trestle.

Description

Pier protection device capable of reducing local scouring

Technical Field

The utility model relates to the technical field of pier safety protection, is used for pier protection of a construction trestle, and particularly relates to a pier protection device for reducing local scouring.

Background

In the construction process, a temporary construction trestle is often built. The trestle is erected in a river, and when the river is in a flood season, the trestle is often damaged by water flow, as shown in fig. 1, the main reason is that the trestle is partially flushed by piers 1. When the water flow impacts the pier 1 in the front direction, a vortex system is formed around the pier 1, the vortex system comprises horseshoe-shaped vortexes 4 formed at the lower part of the pier and wake vortexes 3 caused by water flow separation at two sides of the pier, and the horseshoe-shaped vortexes 4 are a direct reason for generating local scouring of the pier.

It is understood from hydraulics that the inherent cause of the horseshoe vortices 4 is a falling water flow 5 before the pier 1 and concentrated water flows 2 bypassing both sides of the pier 1, and the concentrated water flows 2 form wake vortices 3 on the downstream side of the pier 1, and the wake vortices 3 further expand the influence range of the horseshoe vortices 4. The local scouring of the bridge pier can cause the damage of the bearing surface at the lower end of the bridge pier 1, and the displacement and even the collapse of the bridge pier are caused.

The method of reinforcing pier foundation among the prior art usually reduces the harm that the local scour of pier brought, but its defect lies in: the method for reinforcing the pier foundation can greatly increase the manufacturing cost, and the cost is too high for the temporary construction trestle.

SUMMERY OF THE UTILITY MODEL

The utility model aims to: the pier protection device capable of reducing local scouring is provided aiming at the problem that the local scouring protection cost of the pier is high in the prior art.

In order to achieve the purpose, the utility model adopts the technical scheme that:

the utility model provides a reduce pier protection device that local erodees, includes the spoiler, the both ends of spoiler are connected with two adjacent piers of transversely laying along the river course respectively.

The spoiler transfers the impact of water flow on the spoiler to the bridge piers through the joints between the two ends of the spoiler and the bridge piers for bearing, and the distance between the bridge piers of the temporary construction trestle is short, so that the reasonable stress of the joints can be ensured, and the damage is not easy to occur. The specific installation position of the spoiler is not limited, and the spoiler can be installed between the opposite surfaces of the two piers and also can be installed on the same side of the upstream water flow of the two piers. The spoiler should be installed under the water surface or partially contact with the water surface to play a role in disturbing flow. The surface of the spoiler faces the water flow to form resistance. The surface of the spoiler is not limited to a plane, and the corrugated surface and the spoiler are not affected when being integrally triangular.

The spoiler receives rivers impact and produces horizontal swirl, and horizontal swirl and spoiler combined action at first disturb concentrated rivers, directly influence the formation of horseshoe vortex, and secondly disturb the rivers route of concentrated rivers for the wake vortex loses the formation condition, and the wake vortex that rivers produced is concentrated in last disturbing reduces the influence of wake vortex to the horseshoe vortex. The formation of horseshoe vortices and wake vortices is influenced by the above action, so that the influence of local scouring on the pier is reduced, and the pier is protected. The spoiler is low in manufacturing cost and suitable for short-term protection of temporary structures.

As a preferable scheme of the present invention, there are two spoilers, where the two spoilers are respectively disposed on two sides of the pier, and the two spoilers form a spoiler group.

As a preferable scheme of the present invention, the plurality of spoiler groups are arranged along a height direction of the pier.

In a preferred embodiment of the present invention, the spoiler is bolted to the pier.

In a preferred embodiment of the present invention, the spoiler has a rectangular shape.

In a preferred embodiment of the present invention, the spoiler is a steel plate.

As the preferable scheme of the utility model, a plurality of water through holes are arranged on the spoiler, and the water through holes are transversely arranged along the river channel.

In summary, due to the adoption of the technical scheme, the utility model has the beneficial effects that:

1. the spoiler is arranged between two adjacent piers transversely arranged along a river channel, the spoiler disturbs concentrated water flow between the piers, and after the concentrated water flow is disturbed, the formation of horseshoe-shaped vortexes is directly influenced.

2. The spoiler is arranged between two adjacent piers transversely distributed along a river channel and disturbs a water flow path of concentrated water flow, so that wake vortex loses formation conditions, and further the damage range of the horseshoe vortex is reduced.

3. The spoiler is arranged between two adjacent piers transversely arranged along a river channel and is used for disturbing wake vortexes generated by concentrated water flow, so that the wake vortexes on the left side and the right side of a single pier cannot interact with each other, and the influence of the wake vortexes on the horseshoe-shaped vortexes is reduced.

4. The spoiler is low in manufacturing cost, easy to replace and suitable for temporary structures.

5. The spoiler links two adjacent piers together for atress in coordination between the pier has improved construction landing stage's wholeness.

Drawings

Fig. 1 is a schematic view of a flow direction of water around a pier;

FIG. 2 is a schematic view showing a position where the protection device of embodiment 1 is installed;

FIG. 3 is a schematic view of the position of the protection device under high water level;

FIG. 4 is a schematic top view of a positioning position of the protective device;

the labels in the figure are: 1. a bridge pier; 2. concentrating the water flow; 3. wake vortices; 4. a horseshoe vortex; 5. descending the water flow; 6. a spoiler; 7. and a water through hole.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Example 1

Referring to fig. 1 to 4, the present embodiment discloses a pier protection device for reducing local scour, including a spoiler 6, wherein two ends of the spoiler 6 are respectively connected to two adjacent piers 1 arranged along a river channel in a transverse direction; the number of the spoilers 6 is two, the spoilers 6 are respectively arranged on two sides of the pier 1, and the spoilers 6 form a spoiler group.

The spoiler 6 transfers the impact of water flow on the spoiler 6 to the pier 1 through the connecting part between the two ends of the spoiler and the pier 1 for bearing, and the distance between the piers 1 of the temporary construction trestle is shorter, so that the reasonable stress of the connecting part can be ensured, and the damage is not easy to occur. The specific installation position of the spoiler 6 is not limited, and the spoiler may be installed between the opposite surfaces of the two piers 1, or may be installed on the same side of the two piers 1 facing upstream water flow. The spoiler 6 should be installed under the water surface or partially in contact with the water surface to play a role of turbulence. The surface of the spoiler 6 faces the water flow to form resistance. The surface of the spoiler 6 is not limited to a plane, and both the wavy surface and the spoiler 6 may be formed in a triangular prism shape as a whole.

The piers 1 are not arranged in one row along the river course, and the arrangement of the piers is at least two rows along the river course in the transverse direction.

When the water flow flowing from the upstream to the downstream impacts the temporary construction trestle, the water flow first impacts the pier 1 close to the upstream, and after the water flow is blocked by the pier 1, the descending water flow 5 is formed in front of the pier 1 and the concentrated water flow 2 bypassing the two sides of the pier 1 is formed behind the pier 1. The falling water flow 4 and the concentrated water flow 2 are the inherent cause of the horseshoe vortices 4, and disturbance or even prevention of the formation of either water flow can have an effect on the formation of the horseshoe vortices 4. And concentrated rivers 2 form wake vortex 3 after bypassing pier 1, and thereby the wake vortex 3 of concentrated rivers 2 formation of both sides can interact reinforcing wake vortex 3, and wake vortex 3 can further aggravate the destruction scope of horseshoe vortex 4. This embodiment is connected spoiler 6 between two adjacent piers 1 of transversely laying along the river course, and spoiler 6 and rivers contact to make rivers walk around spoiler 6 along the upper and lower both sides of spoiler 6, the direction of rotation of the rivers that walk around from top to bottom along spoiler 6 is perpendicular with the direction of rotation of concentrated rivers 2, thereby forms horizontal swirl, and its technical effect who reaches lies in:

1. disturbing the concentrated water flow 2 between the piers 1, and directly influencing the formation of horseshoe-shaped vortexes after the concentrated water flow 2 is disturbed;

2. disturbing the water flow path of the concentrated water flow 2 to make the wake vortex 3 lose the forming condition, thereby reducing the damage range of the horseshoe vortex;

3. and the wake vortexes 3 generated by the concentrated water flow 2 are disturbed, so that the wake vortexes 3 on the left side and the right side of the single pier 1 cannot interact with each other, and the influence of the wake vortexes 3 on the horseshoe-shaped vortexes is reduced.

The spoiler 6 and the temporary construction trestle are installed at the same time, the laying time of the trestle is the dry season of the river, the water flow impact force in the dry season is small, and the spoiler 6 and the trestle are convenient to install. When the spoiler 6 is installed, the spoiler can be transversely and continuously arranged or arranged at intervals along a river channel, only the water flow on one side of the pier 1 needs to be disturbed, and the water flow on two sides is better disturbed.

Additionally, the spoilers 6 are used for connecting the plurality of piers 1, so that the cooperative stress of the plurality of piers 1 is facilitated, and the integral rigidity of the construction trestle is improved.

Through set up spoiler 6 between two adjacent pier 1 transversely laying along the river course, spoiler 6 receives water impact and produces horizontal swirl, and rivers 2 are concentrated in the upset to influence the formation of horseshoe vortex and wake swirl 3, make pier 1 receive the influence reduction that local erodeed, thereby protection pier 1. The spoiler 6 is low in manufacturing cost and suitable for protection of temporary construction trestles.

Further, there are two spoilers 6 distributed on both sides of the pier 1, and the two spoilers 6 form a spoiler group.

Spoilers 6 are arranged on one side of the front face of the pier 1, which is impacted by water flow, and one side of the front face of the pier, which is formed by the wake vortex 3, and an area is formed between the pier 1 and the two spoilers 6 which are arranged adjacently and transversely along a river course. Although the single spoiler 6 disturbs the concentrated water flow 2, the water flow, after impacting the spoiler 6, will also bypass the spoiler 6 from both sides in the vertical direction, thereby forming new transverse vortices, while the second spoiler 6 arranged next to the previous spoiler 6 disturbs the new transverse vortices and possibly also the wake vortices 3, thereby further ensuring a reduction of the influence of the horseshoe vortices 4. Since the second spoiler 6 is provided on the side where the wake vortex 3 of the pier 1 is formed, even if the transverse vortex is formed again, it is already at a certain distance from the pier 1, and thus the local erosion of the pier 1 is not greatly affected.

Furthermore, a spoiler group can be also arranged on the pier 1 which is positioned at the rear of the pier 1 which is positioned at the upstream and positioned at the downstream, so as to protect the pier 1 which is positioned at the downstream relatively.

Example 2

Referring to fig. 1 to 4, on the basis of embodiment 1, this embodiment provides a preferable scheme of a part of spoilers 6, specifically, a plurality of spoiler groups are uniformly arranged at intervals along an axis of the pier 1; the spoiler 6 is provided with a plurality of water through holes 7, and the water through holes 7 are transversely arranged along a river channel.

The turbulence plates 6 are arranged at different positions in the water flow, so that the effect of disturbing the concentrated water flow 2 and the wake vortex 3 is different, and the disturbing effect is optimal when the turbulence plates 6 are arranged at the upper part of the concentrated water flow 2, i.e. at the upper part of the wake vortex 3. And the spoilers 6 are installed in the dry season of the river, so that a plurality of the spoiler groups in embodiment 1 can be arranged according to the height of the water level of the river, and the spoiler groups are sequentially and uniformly arranged at intervals along the axis of the pier 1. Each spoiler group corresponds to a water level, when the river is in a rich water period, one or more spoiler groups are ensured to intercept the upper part of the concentrated water flow 2, the spoiler effect is ensured, and meanwhile, the spoiler groups positioned at the lower part of the concentrated water flow 2 due to the rising of the river can also disturb the concentrated water flow 2. Meanwhile, the number of the spoiler groups is calculated by integrating the bending resistance bearing capacity and other factors of the pier 1, so that the problem that too many spoiler groups are arranged to cause too large water intercepting area of the underwater part of the construction trestle and increase the stress of the pier 1 is solved.

The spoiler 6 is provided with a plurality of water through holes 7, the axes of the water through holes 7 are parallel to the longitudinal direction of the river channel, the water through holes 7 can prevent overlarge impact force caused by overlarge water interception area of the spoiler 6, and the effects of reducing the manufacturing cost of the spoiler 6 and passing most gravels are achieved.

Further, the spoiler 6 has a rectangular shape, which is convenient for direct purchase from a manufacturer, but the spoiler 6 is not limited to the rectangular shape. The spoiler 6 is made of steel plates or iron plates and is not easy to corrode, and the rigidity of the spoiler is high. The pier of the temporary construction trestle is a steel pipe pile, so the spoiler 6 can be connected with the pier 1 through bolts, and the spoiler 6 can be disassembled, assembled and replaced when the spoiler 6 is exposed out of the water surface through the bolt connection.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The pier protection device capable of reducing local scouring is characterized by comprising spoilers (6), wherein two ends of each spoiler (6) are respectively connected with two adjacent piers (1) which are arranged along the transverse direction of a river channel; the number of the spoilers (6) is two, the two spoilers (6) are respectively arranged on two sides of the pier (1), and the two spoilers (6) form a spoiler group; the spoiler (6) is provided with a plurality of water through holes (7), and the water through holes (7) are transversely arranged along a river channel.

2. The pier protection device for reducing local scour of claim 1, wherein the number of the spoiler groups is multiple, and the spoiler groups are arranged along the height direction of the pier (1).

3. The pier protection device for reducing the local scour as claimed in claim 1, wherein the spoiler (6) is bolted to the pier (1).

4. The pier protecting device for reducing the local scour as set forth in claim 1, wherein the spoiler (6) has a rectangular shape.

5. The pier protecting device for reducing the local scour as set forth in claim 1, wherein the spoiler (6) is a steel plate.