Anti-scouring protection foot for pier bearing platform

Abstract

The utility model discloses an anti-scouring protection foot for a bridge pier bearing platform, which comprises concrete special-shaped blocks, an embedded metal framework, a self-locking structure, a grass planting plate and a grouting anchor rod, and the plurality of concrete special-shaped blocks are arranged near the bridge pier in the upstream and downstream riverbed areas of the bridge pier; the embedded metal framework is located in the concrete special-shaped block. The grouting anchor rod is connected with the pre-embedded metal framework and a riverbed bedrock or a deep stable soil layer; the self-locking structures are located at the bottoms of the column supports, and every two adjacent self-locking structures are connected through a chain. The grass planting plate is installed on the upper surface of the inclined support. The concrete special-shaped block is placed on the upstream riverbed near the pier and used for reducing flowing of riverbed silt and gravel and the flow speed of water flow, the grouting anchor rod is used for fixing the concrete special-shaped block to the riverbed, high-strength mucilage is injected into the nearby riverbed for condensation, soil around a pier pile foundation is solidified, and finally the rigid overall scour prevention structure is formed. The device is attached to the riverbed surface and tightly attached to the bridge pier, and scouring points are not prone to being generated.

Description

Technical Field

[0001] The utility model belongs to the technical field of civil engineering, and particularly relates to a foot protection for preventing scour of a pier cap. Background Technique

[0002] Due to frequent seasonal floods and large changes in river channels, the riverbed near the pier foundation is constantly scoured by water flow for a long time, which is likely to form local scour pits. In severe cases, it will reduce the bearing capacity of the bridge, lead to the instability of the bridge foundation, and threaten the safety of the bridge. This is a difficult problem in bridge evaluation and maintenance. Especially for areas with frequent floods, high requirements for the stability of the riverbed are needed.

[0003] Local scour generally refers to the phenomenon that under the action of water flow, waves or their combined forces, due to topographic changes or the existence of structures, the sediment at the bottom bed near the structure starts to move and is transported, forming a scour pit. This phenomenon will threaten the safety of nearby water-related buildings. Bridges are common water-related buildings, and local scour of pier foundations is the main factor causing water damage to river-crossing bridges.

[0004] To meet the normal use requirements of the bridge, the riverbed needs to have sufficient bearing capacity and scour stability. Usually, it is necessary to treat the riverbed near the piers and pier caps. The treatment methods are usually related to factors such as the type of pier foundation, the basin, and the flow velocity. Different treatment methods are adopted for different hydrological conditions. The main methods include riprap protection, concrete blocks, sacrificial piles, anti-scour cushions, gabion scour protection, etc. These treatment methods mainly achieve the purpose of anti-scour by fixing themselves with their own weight and enhancing the resistance of the structure to water flow. However, when the flow velocity increases, stones and concrete blocks are easily washed away by the water flow due to the lack of fixing measures. If the water flow contains more sand and gravel, it is easy to wash the stones and concrete out of the cracks, and they cannot form an integral structure with the riverbed and the pier. It is easy to displace due to local scour, and the anti-scour cushion cannot adapt to complex riverbed topography. Therefore, there is no mature solution at present. Content of the Utility Model

[0005] In order to solve the above problems, the utility model provides a foot protection for preventing scour of a pier cap.

[0006] The foot protection for preventing scour of the pier cap of the utility model includes: concrete special-shaped blocks, a plurality of the concrete special-shaped blocks are arranged in the riverbed areas upstream and downstream of the pier, and the concrete special-shaped blocks are located near the pier. The concrete special-shaped blocks include a column support and a plurality of inclined supports connected to the column support; a pre-embedded metal framework, the pre-embedded metal framework is located inside the concrete special-shaped blocks; a grouting anchor rod, the bottom of the grouting anchor rod is provided with an enlarged diameter head, and the grouting anchor rod connects the pre-embedded metal framework with the riverbed bedrock or deep stable soil layer; a self-locking structure, the self-locking structure is located at the bottom of the column support, and adjacent two self-locking structures are connected by a chain; a grass planting board, the grass planting board is installed on the upper surface of the inclined support.

[0007] Three downward inclined supports are evenly arranged on the outer circumference of the middle part of the column support.

[0008] A horizontal extension part is arranged at the end of the inclined support, and a vertically penetrating through hole is opened in the horizontal extension part.

[0009] The embedded metal skeleton is arranged axially at the center of the column support and the center of the inclined support of the concrete special-shaped block, and the embedded metal skeleton in the column support is connected to the embedded metal skeleton in the inclined support.

[0010] The horizontal extension part at the end of the inclined support is also provided with an embedded metal skeleton, and the through hole penetrates through the embedded metal skeleton in the horizontal extension part. The grouting anchor rod is connected to the embedded metal skeleton in the horizontal extension part by welding or by bolts.

[0011] The enlarged diameter head is disc-shaped, the grouting anchor rod is perpendicular to the enlarged diameter head, and the enlarged diameter head of the grouting anchor rod is consolidated with the riverbed bedrock or the deep stable layer through grouting materials.

[0012] The grouting anchor rod is a threaded steel bar anchor rod, and multiple groups of steel bar barbs are arranged at intervals on the grouting anchor rod. Each group of steel bar barbs includes at least three steel bar barbs evenly arranged around the circumference of the grouting anchor rod.

[0013] The interior of the embedded metal skeleton in the column support is hollow, and the top is sealed and the bottom is open. A self-locking structure is arranged at the bottom of the embedded metal skeleton in the column support.

[0014] The self-locking structure includes a self-locking cylinder and a docking cylinder that cooperate with each other. The self-locking cylinder is fixed at the bottom of the embedded metal skeleton in the column support. A spring is fixed at the top end inside the self-locking cylinder, the bottom of the spring is connected to a platform, multiple guide blocks are arranged at intervals along the circumference at the bottom of the platform, multiple locking teeth are arranged at intervals on the inner wall of the lower part of the self-locking cylinder, a channel is left between adjacent two locking teeth, and a card slot is arranged on the upper part of each locking tooth.

[0015] Multiple docking teeth that cooperate with the locking teeth and the guide blocks in the self-locking cylinder are arranged at intervals on the outer surface of the top of the docking cylinder. The top and bottom of the docking teeth are both inclined surfaces. The bottom of the docking cylinder is rotatably connected to a chassis, and a chain is connected inside the chassis through a buckle or a hook.

[0016] The beneficial effects of the present utility model are

[0017] 1. The concrete special-shaped block of the present utility model can also be a concrete flow-around block. Its combination with the grouting anchor rod enables the protection structure to have extremely strong anti-scouring ability, capable of withstanding the impact of high-velocity floods and slowing down the flow velocity. Multiple concrete special-shaped blocks are connected by a self-locking structure and a chain to form a rigid whole, effectively preventing the generation of local scouring points and ensuring the long-term stability of the bridge foundation. The overall structural design takes into account the hydrodynamic characteristics of water flow, can adapt to different hydrological conditions, and has a wide range of applications.

[0018] 2. The present utility model adopts a modular design. The concrete special-shaped blocks can be prefabricated and directly transported to the site for installation, reducing the on-site construction time. The underwater grouting anchor rod technology is applicable to complex hydrological conditions, does not require large-scale equipment or complex processes, has a short construction period, and has little impact on river navigation.

[0019] 3. Compared with the traditional stone pitching method for protecting the foundation, the material cost of the present utility model is reduced by more than 30%. The use of concrete special-shaped blocks and grouting anchor rods reduces the amount of stones used and at the same time avoids the high costs of frequent maintenance of stone pitching. The protection structure has high durability, low later maintenance requirements, and significant long-term economic benefits.

[0020] 4. The present utility model reduces the disturbance of the traditional stone pitching method to the riverbed and avoids the damage to the river ecological environment. The design of the concrete special-shaped block is conducive to the smooth passage of water flow, reduces the scouring impact on the downstream riverbed, and protects the ecological balance of the river.

[0021] 5. Microcapsules of Bacillus are embedded in the concrete special-shaped blocks. Calcium carbonate is generated by bacterial metabolism to achieve self-repair of the structure. It can avoid the problem of cracks generated due to sediment impact and finally leading to the failure of the structure.

[0022] 6. By setting a grass planting board on the surface of the inclined support, a living environment is provided for aquatic plants. The developed root systems of the aquatic plants penetrate deep into the riverbed soil, realizing the combination of rigid protection and ecological protection. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of the foot protection for preventing scouring of the pier cap of the present utility model.

[0024] Figure 2 It is a schematic structural diagram of the embedded metal skeleton of the present utility model.

[0025] Figure 3 It is a schematic structural diagram of the concrete special-shaped block of the present utility model.

[0026] Figure 4 It is a schematic structural diagram of the grouting anchor rod of the present utility model.

[0027] Figure 5 It is a schematic connection diagram of the self-locking structure and the chain of the present utility model.

[0028] Figure 6 It is a schematic internal structure diagram of the self-locking cylinder of the present utility model.

[0029] Figure 7 It is a schematic structural diagram of the docking cylinder of the present utility model.

[0030] Figure 8 It is a schematic structural diagram of the grass-planting board of the present utility model.

[0031] Figure 9 It is a top view of the layout of the concrete special-shaped blocks of the present utility model.

[0032] Reference numerals:

[0033] Bridge pier 1; Concrete special-shaped block 2; Column support 202; Inclined support 203; Horizontal extension part 204; Through hole 205; Grouting anchor rod 3; Enlarged diameter head 301; Steel bar barbs 302; Embedded metal skeleton 4; Self-locking structure 5; Self-locking cylinder 501; Spring 502; Platform 503; Limit block 504; Guide block 505; Channel 506; Locking teeth 507; Docking cylinder 508; Docking teeth 509; Chassis 510; Chain 6; Grass-planting board 7; Grass-planting hole 701; Anchor rod hole 702. Detailed implementation manners

[0034] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0035] As Figures 1-9 shown, the foot protection for preventing scour of the bridge pier cap of the present utility model includes: a concrete special-shaped block 2, an embedded metal skeleton 4, a bridge pier 1, and a grouting anchor rod 3. The concrete special-shaped blocks 2 are arranged in an array in the upstream and downstream riverbed areas of the bridge pier 1. The concrete special-shaped block 2 includes a column support 202 and a plurality of inclined supports 203 connected to the column support 202. The setting of the concrete special-shaped block 2 is used to disperse the water flow energy and reduce the flow velocity.

[0036] The concrete special-shaped blocks 2 in the upstream riverbed area are arranged in a single-arm water-facing manner, that is, one of the three inclined supports 203 corresponds to the upstream water flow direction; the concrete special-shaped blocks 2 in the downstream riverbed area are arranged in a double-arm water-facing manner, that is, two of the three inclined supports 203 correspond to the upstream water flow direction.

[0037] Specifically, three downward inclined supports 203 are uniformly arranged on the outer circumference of the middle part of the column support 202 in the concrete special-shaped block 2. A horizontal extension part 204 is provided at the end of the inclined support 203, and a vertically penetrating through hole 205 is opened in the horizontal extension part 204.

[0038] The surfaces of the column supports 202 and the oblique supports 203 of the special-shaped concrete blocks 2 are provided with concave-convex textures or guide grooves to enhance the turbulence effect of water flow.

[0039] The microcapsules of Bacillus pre-embedded in the concrete special-shaped block 2 utilize bacterial metabolism to generate calcium carbonate to achieve structural self-repair, thus avoiding the problem of cracks caused by sediment impact, which eventually leads to structural failure.

[0040] The grass-planting board 7 is fixed on the upper surface of the oblique support 203 and the horizontal extension 204, and is made of degradable material. A plurality of grass-planting holes 701 are provided on the grass-planting board 7, and anchor holes 702 are provided on the grass-planting board 7 on the horizontal extension 204, corresponding to the through holes 205 on the horizontal extension 204. The oblique support 203 and the grass-planting board 7 on the upper surface of the horizontal extension 204 are connected by hinges. The existence of the grass-planting board 7 provides a living environment for aquatic plants, and utilizes the well-developed root system of aquatic plants to penetrate into the riverbed soil, realizing the combination of rigid protection and ecological protection.

[0041] The embedded metal skeleton 4 is located inside the concrete special-shaped block 2. Specifically, the embedded metal skeleton 4 is axially arranged at the center of the column support 202 and the center of the inclined support 203 of the concrete special-shaped block 2, and the embedded metal skeleton 4 in the column support 202 is connected to the embedded metal skeleton 4 in the inclined support 203. One end of the embedded metal skeleton 4 in the inclined support 203 is located in the middle of the embedded metal skeleton 4 in the column support 202, and the two are connected by welding.

[0042] The horizontal extension part 204 at the end of the inclined support 203 is also provided with an embedded metal frame 4, and the through hole 205 passes through the embedded metal frame 4 in the horizontal extension part 204, and the embedded metal frame 4 in the horizontal extension part 204 is connected to the embedded metal frame 4 in the inclined support 203 by welding.

[0043] The grouting anchor rods 3 connect the embedded metal skeleton 4 with the riverbed bedrock or the deep stable soil layer. Specifically, the top of the grouting anchor rods 3 is connected with the embedded metal skeleton 4 in the horizontal extension part 204 by welding or by bolts.

[0044] An expansion head 301 is provided at the bottom of the grouting anchor rod 3. The expansion head 301 is disc-shaped or plate-shaped. The grouting anchor rod 3 is perpendicular to the expansion head 301. The expansion head 301 of the grouting anchor rod 3 is consolidated with the riverbed bedrock or deep stable layer through grouting material.

[0045] The grouting anchor rod 3 is a threaded steel bar anchor rod, and a plurality of groups of steel bar barbs 302 are evenly spaced on the grouting anchor rod 3 , and each group of steel bar barbs 302 includes at least three steel bar barbs 302 evenly spaced around the circumference of the grouting anchor rod 3 .

[0046] The axis of the grouting bolt 3 forms an angle of 30° - 60° with the water flow direction.

[0047] The embedded metal skeleton 4 in the column support 202 is hollow inside, sealed at the top and open at the bottom. The self-locking structure 5 is arranged at the bottom of the embedded metal skeleton 4 in the column support 202.

[0048] The self-locking structure 5 includes a mutually cooperating self-locking cylinder 501 and a docking cylinder 508. The self-locking cylinder 501 is fixed at the bottom of the embedded metal skeleton 4 in the column support 202. A spring 502 is fixed at the top end inside the self-locking cylinder 501. The bottom of the spring 502 is connected to a platform 503. The platform 503 can move up and down with the spring 502. A plurality of guide blocks 505 are arranged at intervals along the circumference at the bottom of the platform 503. The bottom of the guide block 505 is a slope. A limiting block 504 is arranged on the inner wall of the self-locking cylinder 501 between two adjacent guide blocks 505 to ensure that the guide block 505 can move up and down with the spring 502 and the platform 503, but cannot move left and right.

[0049] A plurality of teeth 507 are arranged at intervals on the lower inner wall of the self-locking cylinder 501. A channel 506 is left between two adjacent teeth 507. There is a slot on the upper part of each tooth 507. The tops of the teeth 507 on both sides of the slot are slopes, and the bottom of the tooth 507 is also a slope. The slopes at the top and bottom of the tooth 507 have different inclination directions.

[0050] Each guide block 505 corresponds to a channel 506 or a slot on the inner wall of the self-locking cylinder 501.

[0051] The top of the docking cylinder 508 is sealed and the bottom is open. A circle of docking teeth 509 corresponding to the number and width of the channels 506 on the inner wall of the self-locking cylinder 501 are arranged at intervals on the outer surface of the top of the docking cylinder 508. The tops and bottoms of the docking teeth 509 are slopes, and the inclination angles of the slopes at the top and bottom are different. The slope at the top of the docking tooth 509 corresponds to the slope at the bottom of the tooth 507 and the slope at the bottom of the guide block 505. The slope at the bottom of the docking tooth 509 corresponds to the slope at the top of the tooth 507.

[0052] The bottom of the docking cylinder 508 is rotatably connected to a chassis 510 through a bearing. A chain 6 is connected inside the chassis 510 through a buckle or a hook. The two ends of the chain 6 are detachably connected to the chassis 510 of two adjacent docking cylinders 508 through a hook or a buckle.

[0053] During use, the docking tooth 509 with the chain 6 is vertically inserted into the inner wall channel of the docking cylinder 501. Without active alignment, under the action of an external force, no matter where it is located, the docking tooth 509 will automatically access the channel 506 along the bottom slope of the locking tooth 507 and run upward along the channel 506 for a certain distance. The docking tooth 509 will touch the guiding block 505. Since the inclined surfaces of the docking tooth 509 and the guiding block 505 just match, it will continue to push the guiding block 505 upward, pressing the spring 502 and the platform 503 to compress upward together. When the bottom of the docking tooth 509 exits the length of the channel 506, due to the action of the inclined surfaces at the top of the docking tooth 509 and the bottom of the guiding block 505, the docking tooth 509 will deflect to the right. At this time, the docking tooth 509 will run downward under the elastic force of the spring 502 and get stuck in the groove of the locking tooth 507 to complete the locking.

[0054] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0055] In addition, in the description of the present invention, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0056] In the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communicable with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0058] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Any changes, modifications, substitutions and variations made by those of ordinary skill in the art to the above embodiments are within the scope of protection of the present utility model.

Claims

1. A foot protection for preventing scouring of pier caps, characterized in that Comprising: Abnormal-shaped concrete blocks, a plurality of the abnormal-shaped concrete blocks are arranged in the riverbed areas upstream and downstream of the pier, and the abnormal-shaped concrete blocks are located near the pier. The abnormal-shaped concrete blocks include a column support and a plurality of inclined supports connected to the column support; Embedded metal skeletons, the embedded metal skeletons are located inside the abnormal-shaped concrete blocks; Grouting anchor rods, the bottom of the grouting anchor rods is provided with an enlarged diameter head, and the grouting anchor rods connect the embedded metal skeletons with the riverbed bedrock or deep stable soil layers; Self-locking structures, the self-locking structures are located at the bottom of the column supports, and adjacent two self-locking structures are connected by chains; Grass planting plates, the grass planting plates are installed on the upper surfaces of the inclined supports.

2. The foot protection for preventing scouring of the pier cap according to claim 1, characterized in that, Three downward inclined supports are evenly arranged on the outer circumference of the middle part of the column support.

3. The foot protection for preventing scouring of pier cap according to claim 2, characterized in that, The end of the inclined support is provided with a horizontally extending part, and a vertically penetrating through hole is opened in the horizontally extending part.

4. The foot protection for preventing scouring of pier cap according to claim 3, characterized in that, The embedded metal skeletons are arranged axially at the centers of the column supports and the inclined supports of the abnormal-shaped concrete blocks, and the embedded metal skeletons in the column supports are connected to the embedded metal skeletons in the inclined supports.

5. The foot protection for preventing scouring of a pier cap according to claim 4, characterized in that, The horizontally extending part at the end of the inclined support is also provided with an embedded metal skeleton, and the through hole penetrates through the embedded metal skeleton in the horizontally extending part. The grouting anchor rods are connected to the embedded metal skeleton in the horizontally extending part by welding or by bolts.

6. The foot protection for preventing scouring of the pier cap according to claim 1, characterized in that, The enlarged diameter head is disc-shaped, the grouting anchor rods are perpendicular to the enlarged diameter head, and the enlarged diameter heads of the grouting anchor rods are consolidated with the riverbed bedrock or deep stable soil layers through grouting materials.

7. The foot protection for preventing scouring of the pier cap according to claim 1, characterized in that, The grouting anchor rods are threaded steel bar anchor rods, and multiple groups of steel bar barbs are arranged at intervals on the grouting anchor rods. Each group of steel bar barbs includes at least three steel bar barbs evenly arranged around the circumference of the grouting anchor rods.

8. The foot protection for preventing scouring of the pier cap according to claim 4, characterized in that, The interior of the embedded metal skeleton in the column support is hollow, and the top is sealed and the bottom is open. The self-locking structure is arranged at the bottom of the embedded metal skeleton in the column support.

9. The foot protection for preventing scouring of the pier cap according to claim 8, characterized in that, The self-locking structure includes a self-locking cylinder and a docking cylinder that cooperate with each other. The self-locking cylinder is fixed at the bottom of the embedded metal skeleton in the column support. A spring is fixed at the top end inside the self-locking cylinder. The bottom of the spring is connected to a platform. A plurality of guide blocks are arranged at intervals along the circumference at the bottom of the platform. A plurality of locking teeth are arranged at intervals on the inner wall of the lower part of the self-locking cylinder. A channel is left between adjacent two locking teeth, and a card slot is arranged at the upper part of each locking tooth.

10. The foot protection for preventing scouring of the pier cap according to claim 9, characterized in that, A plurality of docking teeth that cooperate with the locking teeth and the guide blocks in the self-locking cylinder are arranged at intervals on the outer surface of the top of the docking cylinder. The top and the bottom of the docking teeth are both inclined surfaces. The bottom of the docking cylinder is rotatably connected to a chassis. The inside of the chassis is connected to a chain through a buckle or a hook. The two ends of the chain are respectively connected to the chassis in two adjacent docking cylinders.

Images