A bridge pier foundation scour protection device

Abstract

This invention provides a bridge pier foundation scour protection device, comprising multiple sets of stacked protection units, the diameter of which decreases sequentially from bottom to top. Each protection unit includes a base, a support ring mounted on the base via an mounting cylinder, and multiple sets of support plates stacked on the base, the size of which decreases sequentially from bottom to top. A first adjustment mechanism is provided within the mounting cylinder to drive the support plates to open or close at intervals. A lifting ring is provided on the base, and a second adjustment mechanism is provided within the mounting cylinder to drive the lifting ring to move up and down. A baffle plate, made of a stretchable thermoplastic material, is provided between the base and the support ring. The baffle plate is connected to the base via a tightening assembly, and a heater is provided on the base. This device can switch between multiple configurations, allowing its shape to be adjusted according to the type of riverbed, thereby achieving optimal protection against bridge pier foundation scour under different water conditions.

Description

Technical Field

[0001] This invention relates to the field of bridge pier protection technology, specifically to a bridge pier foundation scour protection device. Background Technology

[0002] The obstruction of water flow by bridge piers causes drastic changes in the surrounding water flow structure, creating a downward flow at the leading edge of the pier head. This downward scouring of the riverbed creates scour pits in front of the pier. The scouring effect of the riverbed around the pier foundation has a serious impact on the safe operation of the bridge structure. Therefore, it is necessary to protect the pier foundation, improve the scouring resistance of the surrounding riverbed, and prevent excessive scouring that could lead to excessive riverbed settlement and reduce the stability of the pier.

[0003] For example, Chinese invention patent No. 202111036268.7 provides a multi-level cushion layer protection method for mitigating local scour of bridge pier foundations. This method protects the bridge pier foundations through a multi-level cushion layer protection device, which can significantly reduce the depth of local scour of the bridge piers. It can be used for the protection of bridge piers that have not experienced significant scour in the early stage or have experienced significant scour in the later stage.

[0004] However, this type of multi-level cushion layer protection is only suitable for use when there are no obvious impurities in the water. When the riverbed is composed of pebbles, the pebbles are prone to impacting the edges of the cushion layer protection device during movement, causing damage to the device. When the riverbed is mainly composed of silt, the multi-level cushion layer protection device is prone to silt accumulation. Existing bridge pier foundation scour protection devices cannot adjust their shape according to the type of riverbed, thus failing to achieve optimal protection against bridge pier foundation scour under different water conditions, resulting in a decrease in the protection effect on the riverbed. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention proposes a bridge pier foundation scour protection device to solve the technical problem mentioned in the background art: existing bridge pier foundation scour protection devices cannot adjust their shape according to the type of riverbed, thus failing to achieve optimal protection against bridge pier foundation scour under different water conditions.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a bridge pier foundation scour protection device, comprising multiple sets of stacked protection units, wherein the diameter of the multiple sets of protection units decreases sequentially from bottom to top, and each protection unit includes:

[0007] A base, wherein a support ring is provided on the base and mounted via a mounting cylinder;

[0008] Multiple sets of support plates are stacked and arranged on the base, and their size decreases from bottom to top. The mounting cylinder is provided with a first adjustment mechanism that drives the multiple sets of support plates to unfold or retract at intervals.

[0009] A lifting ring is mounted on the base, and a second adjusting mechanism for driving the lifting ring to rise and fall is provided inside the mounting cylinder; and

[0010] A baffle plate is provided to cover the gap between the base and the support ring. The baffle plate is made of a stretchable thermoplastic material. The baffle plate is connected to the base through a tightening assembly. A heater is provided on the base.

[0011] In a preferred embodiment, the bottom of the base of the lowest set of protective units is provided with a fixing rod, which is fixed to the riverbed.

[0012] In a preferred embodiment, the first adjusting mechanism includes:

[0013] A lifting assembly is disposed inside the mounting cylinder and connected to the uppermost set of support plates in the protective unit to drive the uppermost support plate to rise and fall.

[0014] A partition assembly, disposed on the base and connected to the multiple sets of support plates, drives the remaining multiple sets of support plates to unfold at intervals during the ascent of the uppermost set of support plates; and

[0015] A positioning component is disposed on the base and connected to the plurality of support plates to position the lifting and lowering of the plurality of support plates.

[0016] In a preferred embodiment, the lifting assembly includes:

[0017] The first motor is fixedly installed inside the mounting cylinder, and the mounting cylinder has multiple sets of sliding grooves extending along its axial direction.

[0018] A first lead screw is rotatably disposed within the mounting cylinder and connected to the output shaft of the first motor; and

[0019] The first slider is provided in multiple sets and is connected to multiple sets of the support plates respectively. The first slider is slidably locked in the slide groove. The first slider connected to the uppermost set of the support plates is screwed to the first lead screw.

[0020] In a preferred embodiment, the separating assembly includes multiple sets of scissor lifts, which are respectively disposed between two adjacent sets of support plates. Guide rods are provided on both the upper and lower layers of the support plates, and hinged sliding sleeves are provided at all four ends of the scissor lifts, which are slidably fitted onto the guide rods.

[0021] In a preferred embodiment, the positioning component includes a positioning rod fixedly disposed between the base and the support ring, and a positioning hole is provided on the support plate, with the positioning rod passing through the positioning hole.

[0022] In a preferred embodiment, the second adjusting mechanism includes:

[0023] The second motor is fixedly installed inside the mounting cylinder;

[0024] The second lead screw is rotatably disposed inside the mounting cylinder along its axis and is connected to the output shaft of the second motor;

[0025] The second slider is slidably mounted in one of the sets of grooves and connected to the lifting ring. The second slider is screwed to the second lead screw.

[0026] In a preferred embodiment, the tightening component includes:

[0027] The first connecting seat is provided in multiple sets and is arranged circumferentially on the base;

[0028] The second connecting seat is provided in multiple sets, and is arranged circumferentially at intervals on the enclosure plate; and

[0029] The tension spring is provided in multiple sets, and its two ends are respectively connected to the first connecting seat and the second connecting seat.

[0030] In a preferred embodiment, the second slider is connected to the lifting ring via a U-shaped frame, and the tension spring is disposed inside the U-shaped frame.

[0031] In a preferred embodiment, the bottommost protective unit is provided with a first adjustment mechanism, and the uppermost set of support plates in each group of protective units is provided with a connecting rod, which passes through the support ring and connects to the uppermost set of support plates in the adjacent group of protective units.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] When in use, the device is fixed to the foundation of the bridge pier. In the initial state, multiple sets of support plates in each protection unit are in the open state. The enclosure is supported by multiple sets of spaced support plates, so that the device is in the first state. Its outer surface has no sharp edges and has good anti-erosion characteristics, thus avoiding the formation of scour pits in front of the bridge pier. It is suitable for bridge area waters where the movement of pebbles is the main feature.

[0034] When the riverbed is mainly characterized by sediment drift and the navigation space is limited in the bridge area, considering that the first and third states are prone to sediment accumulation and channel encroachment, the first adjustment mechanism can reverse to drive multiple sets of support plates to retract, thereby causing the support plates to detach from the retaining plate. Under the action of the tightening component, the retaining plate will be recessed inward, thus putting the device into the second state. The arc surface of the horizontal state and the arc surface of the vertical section of the retaining plate can effectively prevent sediment accumulation and channel encroachment, while avoiding the formation of scour pits in front of the bridge pier, thereby improving the protection effect on the bridge pier foundation.

[0035] When the water flow in the riverbed is fast and there are no obvious impurities in the water, the stepped facade has a good turbulence-disrupting effect. The first adjusting mechanism reverses the rotation to retract multiple sets of retaining panels, and the second adjusting mechanism controls the lifting ring to rise, thus supporting the retaining panels and putting the device into a third state. This enhances the turbulence-disrupting effect, more effectively preventing the formation of scour pits in front of the bridge piers, and further improving the protection of the bridge pier foundation. Through switching between multiple forms, the device can adjust its shape according to the type of riverbed, thereby achieving optimal protection against scour of the bridge pier foundation under different water conditions. Attached Figure Description

[0036] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0037] Figure 1 This is a schematic diagram of the first state of a bridge pier foundation scour protection device provided by the present invention;

[0038] Figure 2 This is a schematic diagram of the second state of a bridge pier foundation scour protection device according to the present invention;

[0039] Figure 3 This is a schematic diagram of the third state of a bridge pier foundation scour protection device according to the present invention;

[0040] Figure 4 This is a three-dimensional structural diagram of the protection unit in a bridge pier foundation scour protection device of the present invention;

[0041] Figure 5 This is a cross-sectional view of the protection unit in a bridge pier foundation scour protection device of the present invention;

[0042] Figure 6 This is a schematic diagram of the base structure in a bridge pier foundation scour protection device of the present invention;

[0043] Figure 7 This is a schematic diagram of the installation structure of the support plate in a bridge pier foundation scour protection device of the present invention;

[0044] Figure 8 This is a schematic diagram of the installation structure of the support ring in a bridge pier foundation scour protection device according to the present invention.

[0045] Figure label:

[0046] 101. Base; 102. Mounting cylinder; 103. Positioning rod; 104. Slide groove; 105. Support ring; 106. Heater; 107. First connecting seat; 108. Fixing rod;

[0047] 201. Fence panel; 202. Second connecting seat; 203. Tension spring;

[0048] 301. Support plate; 302. Positioning hole; 303. Connecting rod; 304. First slider; 305. First motor; 306. First lead screw;

[0049] 401. Scissor lift; 402. Sliding sleeve; 403. Guide rod;

[0050] 501. Lifting ring; 502. U-shaped frame; 503. Second slider; 504. Second lead screw; 505. Second motor. Detailed Implementation

[0051] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0052] Example:

[0053] like Figure 1 , 4 As shown in Figures 5 and 7, the present invention provides a bridge pier foundation scour protection device, comprising multiple sets of stacked protection units, the diameter of which decreases sequentially from bottom to top. Each protection unit includes a base 101, a support ring 105 mounted on the base 101 via an mounting cylinder 102, a baffle plate 201 between the base 101 and the support ring 105, and multiple sets of stacked support plates 301 mounted on the base 101, the size of which decreases sequentially from bottom to top. A first adjustment mechanism is provided inside the mounting cylinder 102 to drive the multiple sets of support plates 301 to unfold or retract at intervals.

[0054] The first adjustment mechanism includes a lifting assembly disposed within the mounting cylinder 102. The lifting assembly is connected to the uppermost set of support plates 301 in the protective unit to drive the uppermost support plate 301 to rise and fall. The lifting assembly includes a first motor 305 fixedly disposed within the mounting cylinder 102. The mounting cylinder 102 has multiple sets of sliding grooves 104 extending along its axial direction. A rotatable first lead screw 306 is disposed within the mounting cylinder 102. The first lead screw 306 is connected to the output shaft of the first motor 305. Each of the multiple sets of support plates 301 is provided with a first slider 304. The first slider 304 is slidably engaged within the sliding groove 104. The first slider 304 connected to the uppermost set of support plates 301 is screwed to the first lead screw 306.

[0055] In the initial state, multiple sets of support plates 301 are open at intervals, supporting the retaining plate 201 and causing it to bulge in an arc shape. The entire device is in its first state, protecting the bridge pier foundation through the retaining plate 201. The arc-shaped retaining plate 201, without sharp edges, has excellent anti-abrasion properties, making it suitable for riverbed structures primarily composed of pebbles. It effectively prevents continuous impact from pebbles on the riverbed foundation and avoids damage to the device. By controlling the first lead screw 306 to reverse, the uppermost set of support plates 301 can be lowered, retracting the multiple sets of support plates 301.

[0056] like Figure 5 , 6 As shown in Figures 7 and 8, in this embodiment, a partition assembly connected to multiple sets of support plates 301 is provided on the base 101. During the ascent of the uppermost set of support plates 301, the partition assembly drives the other sets of support plates 301 to unfold at intervals. The partition assembly includes multiple sets of scissor lifts 401, which are respectively arranged between two adjacent sets of support plates 301. Guide rods 403 are provided on both the upper and lower layers of the support plates 301. Hinged sliding sleeves 402 are provided at all four ends of the scissor lifts 401, and the sliding sleeves 402 are slidably sleeved on the guide rods 403.

[0057] During the lifting and lowering process, the uppermost set of support plates 301 can be driven by the scissor lift 401 to open the other sets of support plates 301 at intervals. The sliding sleeve 402 at the end of the scissor lift 401 can slide along the guide rod 403 to provide stable support for the enclosure 201 and prevent the support plates 301 from shifting during the lifting and lowering process. At the same time, the base 101 is provided with a positioning component that is connected to multiple sets of support plates 301. The positioning component includes a positioning rod 103 fixedly set between the base 101 and the support ring 105. The support plate 301 is provided with a positioning hole 302, and the positioning rod 103 passes through the positioning hole 302. The lifting and lowering of multiple sets of support plates 301 is positioned by the cooperation of the positioning rod 103 and the positioning hole 302.

[0058] like Figure 1 ,4 As shown in Figure 7, it can be understood that in some embodiments, the bottommost protective unit is provided with a first adjustment mechanism, and the uppermost set of support plates 301 in each set of protective units is provided with a connecting rod 303. The connecting rod 303 passes through the support ring 105 and is connected to the uppermost set of support plates 301 in the adjacent set of protective units. During the rotation of the first motor 305 in the bottommost set of protective units, the first lead screw 306 is driven to rotate, which causes the uppermost set of support plates 301 in the set of protective units to rise. During the rise of the support plate 301, the other sets of support plates 301 in the same set of protective units are also driven to rise. At the same time, the connecting rod 303 causes a set of support plates 301 in the adjacent set of protective units to rise, so that the multiple sets of support plates 301 in the adjacent set of protective units are opened at intervals, so that the device can quickly switch to the first state. Similarly, the support plates 301 in multiple sets of protective units can be quickly controlled to retract, so as to quickly release the support of the enclosure 201.

[0059] like Figure 5 , 6 As shown, in this embodiment, the enclosure panel 201 is made of a stretchable thermoplastic material, and a heater 106 is provided on the base 101. The heater 106 can heat the enclosure panel 201, allowing it to deform according to changes in the internal structure of the protective device. The material of the enclosure panel 201 includes, but is not limited to, thermoplastic composite materials such as ultra-high molecular weight polyethylene and polyimide. It has good wear resistance and low water absorption, while also possessing a certain degree of stretchability and toughness to adapt to the shape of the internal structure of the protective device.

[0060] As shown in Figures 2, 5, and 6, in this embodiment, the enclosure panel 201 and the base 101 are connected by a tightening assembly. The tightening assembly includes multiple sets of first connecting seats 107 arranged circumferentially on the base 101 and multiple sets of second connecting seats 202 arranged circumferentially on the enclosure panel 201. Each set of first connecting seats 107 is connected to one of the sets of second connecting seats 202 by a tension spring 203.

[0061] In the first state, the deformed enclosure plate 201 stretches the tension spring 203. After the first adjustment mechanism is reversed and the multiple sets of support plates 301 are retracted, the tension spring 203 contracts and applies an inward pulling force to the enclosure plate 201, thereby causing the enclosure plate 201 to retract. The device is in the second state, which prevents silt and sand from accumulating and encroaching on the waterway during use, and improves the protection effect on the bridge pier foundation.

[0062] like Figure 3 , 5As shown in Figure 8, in this embodiment, a lifting ring 501 is provided on the base 101, and a second adjustment mechanism for driving the lifting ring 501 to rise and fall is provided in the mounting cylinder 102. The second adjustment mechanism includes a second motor 505 fixedly installed in the mounting cylinder 102, and a rotatable second lead screw 504 is provided in the mounting cylinder 102. The second lead screw 504 is connected to the output shaft of the second motor 505. A set of sliding grooves 104 is slidably fitted with a second slider 503 connected to the lifting ring 501. The second slider 503 is screwed to the second lead screw 504.

[0063] After the first adjustment mechanism is reversed and the multiple support plates 301 are retracted, the second motor 505 controls the second lead screw 504 to rotate. During rotation, the second lead screw 504 drives the lifting ring 501 to rise and fall through its screw connection with the second slider 503. After the lifting ring 501 rises to its highest position, it supports the enclosure plate 201, thus putting the device into a third state to improve its turbulence-disrupting effect. This is suitable for use in situations where the water flow is fast and there are no obvious impurities in the water. The second slider 503 and the lifting ring 501 are connected by a U-shaped frame 502. The tension spring 203 is located inside the U-shaped frame 502. The U-shaped frame 502 provides space for the movement of the tension spring 203, preventing interference between the internal parts of the protective device.

[0064] As shown in the figure, in this embodiment, the bottom of the base 101 in the bottommost set of protective units is provided with a fixing rod 108, which is fixed to the riverbed. The device can be installed through the fixing rod 108, and all its internal parts are designed to be detachable and assembled. The base 101, mounting cylinder 102 and support ring 105 are designed to be semi-circular and separate, which facilitates its installation on the bridge pier.

[0065] Specific usage and beneficial effects of the present invention:

[0066] When in use, the device is fixed to the foundation of the bridge pier. In the initial state, the multiple sets of support plates 301 in each protection unit are in the open state. The multiple sets of spaced support plates 301 support the enclosure plate 201, so that the device is in the first state. Its outer surface has no sharp edges and has good anti-erosion characteristics, thereby avoiding the formation of scour pits in front of the bridge pier. It is suitable for bridge area waters where the movement of pebbles is the main feature.

[0067] When the riverbed is mainly characterized by sediment drift and the navigation channel space is limited in the bridge area, considering that the first and third states are prone to sediment accumulation and channel encroachment, the first motor 305 can be controlled to drive the first lead screw 306 to rotate in the opposite direction, so that the uppermost set of support plates 301 descends and drives the scissor lift 401 to move, driving multiple sets of support plates 301 to retract, thereby causing the support plates 301 to detach from the retaining plate 201. Under the action of the tension spring 203, the retaining plate 201 will be concave inward, so that the device is in the second state. The horizontal arc surface and the vertical arc surface of the retaining plate 201 can effectively prevent sediment accumulation and channel encroachment, while avoiding the formation of scour pits in front of the bridge pier, thus improving the protection effect on the bridge pier foundation.

[0068] When the water flow in the riverbed is fast and there are no obvious impurities in the water, the stepped facade has a good turbulence-disrupting effect. The first adjusting mechanism can reverse to drive multiple sets of retaining panels 201 to retract. Then, by controlling the second motor 505 to drive the second lead screw 504 to rotate, the lifting ring 501 rises in conjunction with the second sliding frame, supporting the retaining panels 201. This puts the device in a third state, improving the turbulence-disrupting effect and more effectively preventing the formation of scour pits in front of the bridge piers, further enhancing the protection of the bridge pier foundation. Through switching between multiple forms, the device can adjust its shape according to the type of riverbed, thereby achieving optimal protection against scour of the bridge pier foundation under different water conditions.

[0069] The foregoing has shown and described the basic principles and main features of the present invention and its advantages. It will be apparent to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments.

Claims

1. A bridge pier foundation scour protection device, characterized in that, It includes multiple sets of stacked protective units, the diameter of which decreases sequentially from bottom to top. Each protective unit includes: A base (101) is provided with a support ring (105) mounted by a mounting cylinder (102); Multiple sets of support plates (301) are stacked and arranged on the base (101), and their size decreases from bottom to top. The mounting cylinder (102) is provided with a first adjustment mechanism that drives the multiple sets of support plates (301) to unfold or retract at intervals. A lifting ring (501) is disposed on the base (101), and a second adjusting mechanism for driving the lifting ring (501) to rise and fall is disposed inside the mounting cylinder (102); and A baffle plate (201) is used to cover the gap between the base (101) and the support ring (105). The baffle plate (201) is made of a stretchable thermoplastic material. The baffle plate (201) and the base (101) are connected by a tightening assembly. A heater (106) is provided on the base (101).

2. The bridge pier foundation scour protection device according to claim 1, characterized in that: The bottom of the base (101) of the bottommost set of the protective units is provided with a fixing rod (108), which is fixed to the riverbed.

3. The bridge pier foundation scour protection device according to claim 1, characterized in that, The first adjustment mechanism includes: A lifting assembly is disposed inside the mounting cylinder (102) and connected to the uppermost set of support plates (301) in the protective unit to drive the uppermost support plate (301) to rise and fall; A partition component is disposed on the base (101) and connected to multiple sets of support plates (301). During the upward movement of the uppermost set of support plates (301), the partition component drives the other multiple sets of support plates (301) to unfold at intervals. and A positioning component is disposed on the base (101) and connected to the plurality of support plates (301) to position the lifting and lowering of the plurality of support plates (301).

4. The bridge pier foundation scour protection device according to claim 3, characterized in that, The lifting assembly includes: The first motor (305) is fixedly installed inside the mounting cylinder (102), and the mounting cylinder (102) has multiple sets of sliding grooves (104) extending along its axial direction. The first lead screw (306) is rotatably disposed within the mounting cylinder (102) and connected to the output shaft of the first motor (305); and The first slider (304) is provided in multiple sets and is connected to multiple sets of the support plates (301) respectively. The first slider (304) is slidably locked in the slide groove (104). The first slider (304) connected to the uppermost set of support plates (301) is screwed to the first lead screw (306).

5. The bridge pier foundation scour protection device according to claim 3, characterized in that: The separation assembly includes multiple sets of scissor lifts (401), which are respectively arranged between two adjacent sets of support plates (301). The support plates (301) are provided with guide rods (403) on both the upper and lower layers. Each of the four ends of the scissor lift (401) is provided with a hinged sliding sleeve (402), which is slidably sleeved on the guide rod (403).

6. The bridge pier foundation scour protection device according to claim 3, characterized in that: The positioning component includes a positioning rod (103) fixedly disposed between the base (101) and the support ring (105), and a positioning hole (302) is provided on the support plate (301), and the positioning rod (103) passes through the positioning hole (302).

7. The bridge pier foundation scour protection device according to claim 4, characterized in that, The second adjustment mechanism includes: The second motor (505) is fixedly installed inside the mounting cylinder (102); The second lead screw (504) is rotatably disposed in the mounting cylinder (102) along its axis and is connected to the output shaft of the second motor (505); The second slider (503) is slidably mounted in one of the sets of the slide grooves (104) and connected to the lifting ring (501). The second slider (503) is screwed to the second lead screw (504).

8. The bridge pier foundation scour protection device according to claim 7, characterized in that, The tightening component includes: The first connecting seat (107) is provided in multiple sets and is arranged circumferentially on the base (101); The second connecting seat (202) is provided in multiple sets and is arranged circumferentially at intervals on the enclosure piece (201); and Multiple sets of tension springs (203) are provided, and their two ends are respectively connected to the first connecting seat (107) and the second connecting seat (202).

9. A bridge pier foundation scour protection device according to claim 8, characterized in that: The second slider (503) is connected to the lifting ring (501) via a U-shaped frame (502), and the tension spring (203) is disposed inside the U-shaped frame (502).

10. A bridge pier foundation scour protection device according to claim 1, characterized in that: The bottommost protective unit is provided with a first adjustment mechanism, and the uppermost set of support plates (301) in each set of protective units is provided with a connecting rod (303). The connecting rod (303) passes through the support ring (105) and is connected to the uppermost set of support plates (301) in the adjacent set of protective units.

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