CN117071413A - Device and method for preventing scour of shackle and retainer combined sleeve type pier - Google Patents

Device and method for preventing scour of shackle and retainer combined sleeve type pier Download PDF

Info

Publication number
CN117071413A
CN117071413A CN202311163191.9A CN202311163191A CN117071413A CN 117071413 A CN117071413 A CN 117071413A CN 202311163191 A CN202311163191 A CN 202311163191A CN 117071413 A CN117071413 A CN 117071413A
Authority
CN
China
Prior art keywords
pier
sleeve
piece
ring
protection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311163191.9A
Other languages
Chinese (zh)
Inventor
王炎
封林启
陈锦超
王智航
黄铭权
朱子琪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Sci Tech University ZSTU
Original Assignee
Zhejiang Sci Tech University ZSTU
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Sci Tech University ZSTU filed Critical Zhejiang Sci Tech University ZSTU
Priority to CN202311163191.9A priority Critical patent/CN117071413A/en
Publication of CN117071413A publication Critical patent/CN117071413A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/20—Equipment for shipping on coasts, in harbours or on other fixed marine structures, e.g. bollards
    • E02B3/26—Fenders
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Architecture (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

The invention discloses a shackle retainer combined sleeve type pier scour prevention device which comprises a support sleeve, an upper protection piece, a lower protection piece and a protection surrounding ring. The upper protection piece and the lower protection piece are annular, and the inner circumference edge is respectively fixed at the top end and the bottom end of the supporting sleeve. The protective enclosure is secured to the outer circumferential edge of the upper protective member. In the working process, the supporting sleeve, the upper protecting piece and the lower protecting piece are sleeved on the outer side of the bottom of the pier; the upper guard is used for blocking downward jet flow formed by water flow impacting on the bridge pier, and the guard enclosing ring is used for blocking the jet flow impacting on the upper guard from flowing to the outer end. According to the invention, the protective surrounding ring is arranged at the edge of the upper protective member and used for blocking water flow flowing along the surface of the upper protective ring, so that the influence of water flow below the upper protective member when jet flow above the upper protective member moves out of the range of the upper protective ring is avoided, and the water flow continues to move downwards, thereby generating impact damage to sand and stones in a river bed below.

Description

Device and method for preventing scour of shackle and retainer combined sleeve type pier
Technical Field
The invention belongs to the technical field of pier scour prevention devices, and particularly relates to a shackle retainer combined sleeve type pier scour prevention device and method.
Background
The bridge is divided into an upper part and a lower part. The upper part of the bridge is a part directly supporting the load of the vehicle or person, and is formed by an upper plate bottom frame and a column member. The lower part of the bridge is a part for transmitting the load applied to the upper part to the foundation, and is composed of a bridge abutment, a bridge pier, and a foundation part (pile foundation, cup foundation, etc.). When the existing bridge pier is used, the bridge pier position can generate a scouring phenomenon due to the flowing of surrounding water flow. The scouring phenomenon means that when water flow meets the pier, descending water flow, tail wake vortexes, horseshoe vortexes at two sides, small vortexes released near the bed surface behind the pier and the like are easy to form.
As shown in fig. 1, a downward flow and horseshoe vortex are formed in front of the pier, and a wake vortex is formed behind the pile. The formation and movement of horseshoe-shaped vortex and wake vortex enhance the transportation capability of substances on the surface of a river bed, so that obvious local scouring pits are formed on the bridge pile foundation, the effective embedding depth of the bridge pile foundation in the river bed soil body is reduced, the bearing capacity of the pile foundation is reduced, the safety and stability of a bridge are greatly influenced, in mountain cities, the flow velocity of water flow is larger, and the influence of water flow scouring on the safety and stability of the bridge is also even better.
The existing pier anti-impact structure is mainly prepared by increasing the cross-sectional area of the pier or adding a special anti-impact structure around the pier to resist the scouring of river sand and gravel, and the main measures comprise: the steel wrapping method, the concrete reinforcement method, the object structure protection, the anti-collision pier and the like can improve the safety of the pier to a certain extent, but the main problems are as follows: 1. the whole repairing construction process is complicated, the operation is not easy, and the construction period is long; 2. the increase of the cross section can lead to the increase of the size of the bridge pier, reduce the area of the river channel flow cross section, increase the flow velocity at the bridge pier and bring about larger scouring; 3. the manufacturing cost is high, and the large cost investment and the resource waste are caused.
Disclosure of Invention
The invention aims to provide a device and a method for preventing scour of a sleeve-type pier by combining a shackle and a retainer.
In a first aspect, the present invention provides a shackle retainer combination sleeve pier scour prevention device comprising a support sleeve, an upper guard, a lower guard, and a guard collar. The upper protection piece and the lower protection piece are annular, and the inner circumference edge is respectively fixed at the top end and the bottom end of the supporting sleeve. The protective surrounding ring is fixed on the outer circumferential edge of the top surface of the upper protective piece; the pier scour prevention device is formed by encircling a plurality of protection units; and two adjacent protection units are detachably connected.
In the working process, the supporting sleeve, the upper protecting piece and the lower protecting piece are sleeved on the outer side of the bottom of the pier; the outer side surface of the bridge pier, the top surface of the upper protective piece and the inner side surface of the protective enclosing ring form a groove structure with a U-shaped longitudinal section; the groove structure blocks water flow from impacting downward jet flow formed on the bridge pier and guides the downward jet flow to be converted into water flow upwards along the upper protecting piece and vortex flow above the upper protecting piece, so that the water flow cannot impact a river bed; the lower protection piece can prevent water flow from impacting downward jet flow formed on the support sleeve, and sediment at the joint of the bridge pier and the river bed is prevented from being directly impacted.
Preferably, the height of the protective surrounding ring is 1/6-1/4 of the inner diameter of the supporting sleeve.
Preferably, the support sleeve is divided into a cylindrical section positioned above and a circular table section positioned below. The diameter of the top of the circular bench section is smaller than that of the bottom, and the cone angle of the outer side surface of the circular bench section is 30-60 degrees.
Preferably, the outer diameter of the bottom of the supporting sleeve circular table section is 1.3-1.6 times of the outer diameter of the supporting sleeve.
Preferably, the height of the circular table section of the support sleeve is 0.8-1.2 times of the height of the support sleeve.
Preferably, the difference between the inner and outer diameters of the upper guard is equal to the difference between the inner and outer diameters of the lower guard.
Preferably, the number of the protection units is two; the supporting sleeve is divided into two semicircular cylinder structures; the upper protection piece is divided into two upper semicircular structures; the lower guard is divided into two lower semicircular structures. The two upper semicircular structures and the two lower semicircular structures are detachably connected through the fixing assembly.
Preferably, the fixing assembly comprises a connecting piece; the two ends of the connecting piece are respectively fixed with the two upper protection pieces, or the two ends of the connecting piece are respectively fixed with the two lower semicircular ring structures.
Preferably, the fixing assembly further comprises two bolts, and two ends of the connecting piece are fixed through the two bolts respectively.
In a second aspect, the invention provides a pier scour protection method, which comprises the following steps:
step one, assembling each protection unit forming the anti-scouring device on the top of a protected pier, so that each protection unit surrounds the top of the pier.
And step two, releasing each protection unit assembled and fixed together, so that the pier scour prevention device formed by each protection unit sinks to the water bottom to provide protection for the bottom of the pier, and reducing the scour loss of sediment at the joint of the pier and the river bed.
The invention has the beneficial effects that:
1. according to the invention, the protective surrounding ring is arranged at the edge of the upper semicircular protective ring, so that when water flow impacts the surface of the upper semicircular protective ring, the water flows outwards along the upper semicircular protective ring. The protection surrounding ring is used for blocking the water flow, so that when the water flow above the upper semicircular ring guard ring moves out of the range of the upper semicircular ring guard ring, the water flow is affected by the water flow below, and the water flow continues to move downwards, thereby generating impact damage to sand and stones in the river bed below.
2. According to the invention, the supporting sleeve is divided into the cylindrical section positioned above and the circular table section positioned below, and water flow impacting on the circular table section is guided to flow upwards through the outer side surface of the circular table section so as to be counteracted with downward jet flow formed by the cylindrical section; the generation of jet flow towards the river bed is reduced, so that the erosion of the sand and stone of the river bed around the bridge pier is reduced.
Drawings
FIG. 1 is a schematic view of a concave structure formed by water flow flushing at the joint of a pier and a river bed in a conventional state.
Fig. 2 is a schematic overall structure of embodiment 1 of the present invention.
Fig. 3 is a schematic view showing the structure of the fixing assembly and the lower guard in embodiment 1 of the present invention.
Fig. 4 is a schematic view of water flushing after installing the bridge pier according to embodiment 1 of the present invention.
Fig. 5 is a schematic overall structure of embodiment 2 of the present invention.
Fig. 6 is a schematic view of water flushing after installing the bridge pier according to embodiment 2 of the present invention.
Fig. 7 is a schematic view showing a river bed scouring comparison bottom view of the bridge pier non-installed device and the installed embodiments of the present invention.
Fig. 8 is a schematic diagram showing comparison of pier scour in each of the non-installed pier devices and installed pier according to the embodiments of the present invention.
Wherein: 1. a fixing assembly; 1-1, a connecting part; 1-2, bolts; 2. a protection unit; 2-1, supporting the sleeve; 2-2, upper guard; 2-3, lower guard; 2-4, a protective surrounding ring.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Example 1
As shown in fig. 1 and 2, a shackle retainer combined sleeve type pier scour prevention device comprises two protection units 2 and a plurality of fixing components 1. The two protection units 2 are surrounded on the outer surface of the bridge pier; adjacent sides of the two guard units 2 are detachably connected. The protection unit 2 includes a half cylinder, a half ring, an upper half ring retainer, and a lower half ring retainer. The two semi-cylinders can be surrounded to form a complete cylindrical support sleeve 2-1. The two upper semicircular retainers can be surrounded to form a complete annular upper guard 2-2. The two semicircular surrounding rings can surround to form a complete annular vertical plate-shaped protection surrounding ring 2-4. The two lower semicircular retainers can be surrounded to form a complete annular lower guard 2-3. The height of the protective surrounding ring (2-4) is 1/4 of the inner diameter of the supporting sleeve (2-1).
The height of the semi-cylinder is twice the diameter of the bridge pier, and the inner diameter of the semi-cylinder is slightly larger than the diameter of the bridge pier. After the two semicircular cylinders are conveniently arranged on the surface of the pier on the liquid level, the semicircular cylinders can slide down to below the liquid level along the outer surface of the pier. Wherein, the diameter of the bridge pier is 1-10m. The outer diameters of the upper semicircular guard ring and the lower semicircular guard ring are two times of the diameter of the bridge pier. The inner ring edge of the upper semicircular ring retainer and the inner ring edge of the lower semicircular ring retainer are welded and fixed with the top end edge and the bottom end edge of the semi-cylinder respectively. The height of the semicircular ring is 1/4 of the radius of the bridge pier; the inner ring edge of the semicircular ring is fixed with the outer ring edge of the upper semicircular ring guard ring. The semicircular ring is used for blocking jet flow impacting on the upper semicircular ring guard ring and continuously flowing outwards along the surface of the upper semicircular ring guard ring; the water flow above the upper semicircular guard ring is prevented from being influenced by the water flow below when moving out of the range of the upper semicircular guard ring, and the water flow continues to move downwards, so that impact damage is generated to sand and stones in a river bed below.
As shown in fig. 2, the adjacent side edges of the two upper semicircular retainers and the adjacent side edges of the two lower semicircular retainers are connected by the mounting fixture 1. The fixing assembly 1 includes a connection part 1-1 and two bolts 1-2. The two ends of the connecting part 1-1 are respectively arranged on the two upper semicircular guard rings or the two lower semicircular guard rings. The connecting member 1-1 is fixed to the upper semicircular retainer and the lower semicircular retainer by bolts 1-2.
When in use, the semicircular cylinders in the two protection units 2 are used for completing the surrounding of the bridge pier on the water surface; the two upper semicircular guard rings are fixed together through a plurality of fixing components 1 to form an upper guard piece 2-2 surrounding the bridge pier; the two lower semicircular retainers are fixed together to form a lower guard 2-3 surrounding the pier. At this time, the two semicircular cylinders are surrounded to form a complete supporting sleeve 2-1, and the two semicircular rings are surrounded to form a complete protecting ring 2-4; after the fixing is completed, the support sleeve 2-1 slides down along the outer surface of the pier until sinking to the joint of the pier and the river bed.
The working principle of the invention is as follows:
as shown in fig. 4; the water flow impacting on the bridge pier forms a detour flowing to two sides of the bridge pier and a jet flow downwards parallel to the axis of the bridge pier. The upper semicircular guard ring blocks downward jet flow; the jet impinging on the upper semicircular ring guard forms a stream of water that flows outwardly along the surface of the upper semicircular ring guard. The water flow is impacted on the protection surrounding ring 2-4 and blocked by the protection surrounding ring 2-4, so that when the water flow moves out of the range of the upper semicircular guard ring, the water flow is influenced by the water flow below and continues to move downwards, and impact damage is caused to sand and stones in the river bed below.
The water flow impacting on the support sleeve 2-1 forms a detour flowing to the two sides of the support sleeve 2-1 and a downward jet along the outer surface of the support sleeve 2-1, the downward jet is blocked by the lower semicircular guard ring, so that the jet is prevented from directly impacting the joint of the pier and the riverbed, but acts on the edge of the lower semicircular guard ring; meanwhile, the lower semicircular guard ring can inhibit horseshoe-shaped vortex formed at the joint of the bridge pier and the river bed sediment, so that sediment loss of the joint of the bridge pier and the river bed is reduced.
Example 2
As shown in fig. 2 and 3, a shackle retainer combined sleeve type pier scour prevention device comprises two protection units 2 and a plurality of fixing components 1. The two protection units 2 are surrounded on the outer surface of the bridge pier; adjacent sides of the two guard units 2 are detachably connected. The protection unit 2 includes a protection support cylinder, a semicircular ring, an upper semicircular ring retainer and a lower semicircular ring retainer. The two protection support cylinders can surround to form a complete support sleeve 2-1 with an outer side surface in the shape of a cylinder at the upper part and a round table at the lower part. The two upper semicircular retainers can be surrounded to form a complete annular upper guard 2-2. The two semicircular surrounding rings can surround to form a complete annular vertical plate-shaped protection surrounding ring 2-4. The two lower semicircular retainers can be surrounded to form a complete annular lower guard 2-3.
The height of the protective supporting cylinder is twice the diameter of the bridge pier. The protective supporting cylinder is divided into a cylindrical section and a circular table section; the cylindrical section is in a semicircular sleeve shape; the inner diameter of the cylindrical section is slightly larger than the diameter of the bridge pier, so that the two protection support cylinders can slide along the surface of the bridge pier after being installed. Wherein the diameter of the bridge pier is 1m-10m. The round platform section of the protection support cylinder is in a round platform shape with a small upper part and a big lower part. The outer diameter of the bottom of the circular table section is 1.5 times of the inner diameter of the protection supporting cylinder. The cone angle of the outer side surface of the round platform section is 30-60 degrees. The inner ring edge of the upper semicircular guard ring is welded and fixed with the top edge of the cylindrical section of the protection support cylinder; the inner ring edge of the lower semicircular guard ring is welded and fixed with the outer side edge of the bottom of the circular truncated cone section of the protective support cylinder.
The height of the semicircular ring is 1/4 of the radius of the bridge pier; the inner ring edge of the semicircular ring is fixed with the outer ring edge of the upper semicircular ring guard ring. The semicircular ring is used for blocking jet flow impacting on the upper semicircular ring guard ring and continuously flowing outwards along the surface of the upper semicircular ring guard ring; the water flow above the upper semicircular guard ring is prevented from being influenced by the water flow below when moving out of the range of the upper semicircular guard ring, and the water flow continues to move downwards, so that impact damage is generated to sand and stones in a river bed below.
The adjacent side edges of the two upper semicircular rings and the adjacent side edges of the two lower semicircular rings are connected through the mounting and fixing assembly 1. The fixing assembly 1 includes a connection part 1-1 and two bolts 1-2. The two ends of the connecting part 1-1 are respectively arranged on the two upper semicircular guard rings or the two lower semicircular guard rings. The connecting member 1-1 is fixed to the upper semicircular retainer and the lower semicircular retainer by bolts 1-2.
When in use, the protective supporting cylinders in the two protective units 2 are used for completing the surrounding of the bridge pier on the water surface; the two upper semicircular guard rings are fixed together through a plurality of fixing components 1 to form an upper guard piece 2-2 surrounding the bridge pier; the two lower semicircular retainers are fixed together to form a lower guard 2-3 surrounding the pier. At this time, the two protection support cylinders are surrounded to form a complete support sleeve 2-1, and the two semicircular rings are surrounded to form a complete protection surrounding ring 2-4; after the fixing is completed, the support sleeve 2-1 slides down along the outer surface of the pier until sinking to the joint of the pier and the river bed.
The working principle of the invention is as follows:
the water flow impacting on the bridge pier forms a detour flowing to two sides of the bridge pier and a jet flow downwards parallel to the axis of the bridge pier. The upper semicircular guard ring blocks downward jet flow; the jet impinging on the upper semicircular ring guard forms a stream of water that flows outwardly along the surface of the upper semicircular ring guard. The water flow is impacted on the protection surrounding ring 2-4 and blocked by the protection surrounding ring 2-4, so that when the water flow moves out of the range of the upper semicircular guard ring, the water flow is influenced by the water flow below and continues to move downwards, and impact damage is caused to sand and stones in the river bed below.
The water flow impinging on the cylindrical section of the support sleeve 2-1 forms a detour towards both sides of the cylinder and a jet down the outer surface of the cylindrical section; the water flow impinging on the circular table section of the support sleeve 2-1 forms a detour to both sides of the circular table section and a water flow facing upwards along the outer side of the circular table section. The jet flow formed by the cylindrical section and the water flow upwards along the outer side of the circular truncated cone section mutually impact. The jet flow is prevented from directly impacting the joint of the bridge pier and the riverbed, but acts on the joint of the cylindrical section and the round platform section in the supporting sleeve 2-1; meanwhile, the lower semicircular guard ring can inhibit horseshoe-shaped vortex formed at the joint of the bridge pier and the river bed sediment, so that sediment loss of the joint of the bridge pier and the river bed is reduced.
Simulating the river bed scouring condition and the sediment volume change condition when the scour prevention device described in the embodiments 1 and 2 is arranged on the bridge pier without the scour prevention device; the simulated initial river bed sediment thickness is 5m, the pier radius is 2.5m, the retainer radius is 5m, the ratio of the supporting cylinder height to the supporting cylinder radius is 2, the water flow speed is 2m/s, the simulation is carried out by adopting a FLUENT module of finite element software ANSYS, the model reaches a steady state after 20 time steps, and the obtained simulation result is shown in figure 7; in fig. 7, the parts (a), (b) and (c) correspond to piers without anti-scour devices and piers with anti-scour devices according to embodiments 1 and 2; in fig. 7, the darker the color, the shallower the sediment thickness, the more severely the riverbed sand and stone scour.
The simulation results are shown in FIG. 8; in fig. 8, the parts (d), (e) and (f) correspond to piers without anti-scour devices and piers with anti-scour devices according to embodiments 1 and 2, respectively; in fig. 8, the darker the color indicates the ratio of sand to stone per unit volume, and the darker the color indicates the ratio of sediment to sand.
Under the condition that the anti-scouring device described in the embodiments 1 and 2 is not protected, the thickness of the sediment at the front side, the rear side and the left and right sides of the pier is changed, as shown in the following table 1.
TABLE 1 contrast table for sediment thickness of river bed after flushing
With reference to fig. 7 and 8 and table 1, examples 1 and 2 both enable the bridge pier to maintain a greater sediment thickness under the water flush at the junction with the river bed, and the scour protection achieved in example 2 is optimal.

Claims (10)

1. A shackle retainer combination sleeve type pier scour prevention device is characterized in that: comprises a supporting sleeve (2-1), an upper protecting piece (2-2), a lower protecting piece (2-3) and a protecting surrounding ring (2-4); the upper protective piece (2-2) and the lower protective piece (2-3) are annular, and the inner circumferential edges are respectively fixed at the top end and the bottom end of the supporting sleeve (2-1); the protective surrounding ring (2-4) is fixed on the outer circumferential edge of the top surface of the upper protective piece (2-2); the pier scour prevention device is formed by encircling a plurality of protection units (2); the two adjacent protection units (2) are detachably connected;
in the working process, the supporting sleeve (2-1), the upper protecting piece (2-2) and the lower protecting piece (2-3) are sleeved on the outer side of the bottom of the bridge pier; the outer side surface of the bridge pier, the top surface of the upper protecting piece (2-2) and the inner side surface of the protecting surrounding ring (2-4) form a groove structure with a U-shaped longitudinal section; the groove structure blocks the downward jet flow formed on the bridge pier from being impacted by the water flow, and guides the downward jet flow to be converted into the water flow upwards along the upper protection piece (2-2) and the vortex above the upper protection piece (2-2), so that the water flow cannot impact the river bed; the lower protective piece (2-3) can prevent water flow from impacting downward jet flow formed on the support sleeve (2-1) so as to prevent sediment at the joint of the bridge pier and the river bed from being directly impacted.
2. The shackle retainer modular sleeve pier scour prevention apparatus according to claim 1, wherein: the height of the protective surrounding ring (2-4) is 1/6-1/4 of the inner diameter of the supporting sleeve (2-1).
3. The shackle retainer modular sleeve pier scour prevention apparatus according to claim 1, wherein: the supporting sleeve (2-1) is divided into a cylindrical section positioned above and a circular table section positioned below; the diameter of the top of the circular bench section is smaller than that of the bottom, and the cone angle of the outer side surface of the circular bench section is 30-60 degrees.
4. A shackle retainer combination sleeve pier scour prevention apparatus according to claim 3, wherein: the outer diameter of the bottom of the round table section of the supporting sleeve (2-1) is 1.3-1.6 times of the outer diameter of the supporting sleeve (2-1).
5. A shackle retainer combination sleeve pier scour prevention apparatus according to claim 3, wherein: the height of the round table section of the supporting sleeve (2-1) is 0.8-1.2 times of the height of the supporting sleeve (2-1).
6. A shackle retainer combination sleeve pier scour prevention apparatus according to claim 3, wherein: the difference between the inner diameter and the outer diameter of the upper guard (2-2) is equal to the difference between the inner diameter and the outer diameter of the lower guard (2-3).
7. The shackle retainer modular sleeve pier scour prevention apparatus according to claim 1, wherein: the number of the protection units (2) is two; the supporting sleeve (2-1) is divided into two semicircular cylinder structures; the upper protective piece (2-2) is divided into two upper semicircular structures; the lower protective piece (2-3) is divided into two lower semicircular ring structures; the adjacent side edges of the two upper semicircular structures and the adjacent side edges of the two lower semicircular structures are detachably connected through the fixing assembly (1).
8. The shackle retainer modular sleeve pier scour prevention apparatus according to claim 7, wherein: the fixing component (1) comprises a connecting piece; the two ends of the connecting piece are respectively fixed with the two upper protection pieces (2-2), or the two ends of the connecting piece are respectively fixed with the two lower semicircular structures.
9. The shackle retainer modular sleeve pier scour prevention apparatus according to claim 8, wherein: the fixing assembly (1) further comprises two bolts (1-2), and two ends of the connecting piece are fixed through the two bolts (1-2) respectively.
10. A pier scour prevention protection method is characterized in that: the method comprises the following steps:
assembling each protection unit (2) forming the shackle retainer combined sleeve type pier scour prevention device according to any one of claims 1-9 on the top of a protected pier, so that each protection unit (2) surrounds the top of the pier;
and step two, releasing each protection unit (2) which is assembled and fixed together, so that the pier anti-scouring device formed by each protection unit (2) sinks to the water bottom, the bottom of the pier is protected, and the scouring loss of sediment at the joint of the pier and the river bed is reduced.
CN202311163191.9A 2023-09-09 2023-09-09 Device and method for preventing scour of shackle and retainer combined sleeve type pier Pending CN117071413A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311163191.9A CN117071413A (en) 2023-09-09 2023-09-09 Device and method for preventing scour of shackle and retainer combined sleeve type pier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311163191.9A CN117071413A (en) 2023-09-09 2023-09-09 Device and method for preventing scour of shackle and retainer combined sleeve type pier

Publications (1)

Publication Number Publication Date
CN117071413A true CN117071413A (en) 2023-11-17

Family

ID=88709810

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311163191.9A Pending CN117071413A (en) 2023-09-09 2023-09-09 Device and method for preventing scour of shackle and retainer combined sleeve type pier

Country Status (1)

Country Link
CN (1) CN117071413A (en)

Similar Documents

Publication Publication Date Title
KR101967578B1 (en) Defensive equipment for pier foundation of scour suppress type
CN103195101A (en) Safety well lid
JP2007191936A (en) Transmission type erosion control dam
CN101235649A (en) Covered digging system for pit
CN104727344A (en) Anti-collision structure of submerged floating tunnel
CN104480911B (en) Flexible foundation energy dissipater structure
CN104711931B (en) Temporary underwater pier manufacturing, assembling and disassembling method suitable for bridge erection
KR100673548B1 (en) Verticality measure apparatus of pier for bridge
CN104929037B (en) Bridge pier stud flow guide device
CN117071413A (en) Device and method for preventing scour of shackle and retainer combined sleeve type pier
CN104746421A (en) Anti-collision facility for bridge pier
CN106978780B (en) Pier protector
KR100530273B1 (en) Apparatus of protect boring using a pier
CN109339006B (en) Efficient cone-type hydraulic power absorption well and construction method thereof
KR20080046619A (en) Structure for preventing scouring of river
CN117107625A (en) Anti-scouring device and method for assembled bridge pier
KR100615720B1 (en) Structure preventing from erode of foundation of road pier
CN102535496A (en) Expanded pier structure and forming method thereof
CN203320498U (en) Vibration reduction and energy dissipation limiting device for water diversion steel pipe support in hydropower station
CN104695381A (en) Water plant simulated energy-dissipation protective structure for river bank slopes
CN105735196B (en) A kind of frame bucket dock structure and its manufacturing method
CN110258601B (en) Underwater construction device and method for cross-sea bridge pier column and bearing platform
JP2003313852A (en) Steel frame weir bank
CN102518091A (en) Arrangement and construction method of energy dissipation orifices in flood discharging tunnel
JP6002777B2 (en) Tsunami wave reduction device for buildings

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination