CN-224227222-U - Corrosion prevention device for sacrificial anode of steel pipe pile of cross-sea bridge

CN224227222UCN 224227222 UCN224227222 UCN 224227222UCN-224227222-U

Abstract

The utility model discloses a sacrificial anode corrosion prevention device for a steel pipe pile of a cross-sea bridge, which is arranged on a bearing platform electrically connected with the steel pipe pile, wherein the device comprises a pre-buried conductor, an external conductor and a sacrificial anode piece; the embedded conductor is partially embedded in the bearing platform and is connected with the reinforcing steel bar in the bearing platform, the sacrificial anode piece is embedded in the seabed covering layer at the side part of the bearing platform, the external conductor adopts a rigid structure, one end of the external conductor is connected with the part of the embedded conductor, which is exposed out of the bearing platform, and the other end of the external conductor is connected with the sacrificial anode piece. The device can be synchronously constructed and installed along with the main structure of the bearing platform, so that complex procedures of secondary diving operation in the traditional process are avoided, the construction efficiency is greatly improved, and the risk of underwater operation is reduced. Meanwhile, the device further prolongs the protection period through a replaceable connection structure, improves the anti-scouring performance through a rigid external conductor attached to the surface of the bearing platform, and realizes real-time and intelligent monitoring of the protection state of the steel pipe pile through a cathode monitoring system.

Inventors

WU BO
SUN WEIJIE
ZHAO XIAOQIANG
SHEN JINQIANG
Meng Daiwen
ZHOU JINLIN
MA LONG

Assignees

中交一公局厦门工程有限公司

Dates

Publication Date: 20260512
Application Date: 20250516

Claims (10)

1. The corrosion prevention device for the sacrificial anode of the steel pipe pile of the cross-sea bridge is arranged on a bearing platform which is electrically connected with the steel pipe pile and is characterized by comprising a pre-buried conductor, an external conductor and a sacrificial anode piece; the embedded conductor part is embedded in the bearing platform and is connected with the reinforcing steel bars in the bearing platform; The sacrificial anode piece is embedded in the seabed covering layer at the side part of the bearing platform; The external conductor adopts a rigid structure which is locally attached to the surface of the bearing platform, one end of the external conductor is connected with the part of the embedded conductor, which exposes out of the bearing platform, and the other end of the external conductor is connected with the sacrificial anode piece.
2. The device of claim 1, wherein the outer conductor is configured as a space structure with a plurality of bending sections.
3. The corrosion prevention apparatus for a sacrificial anode of a steel pipe pile of a cross-sea bridge as set forth in claim 2, wherein the bottom of said outer conductor is L-shaped in a horizontal direction for connection to said sacrificial anode member in a direction parallel to the surface of the platform.
4. The corrosion prevention device for the sacrificial anode of the steel pipe pile of the cross-sea bridge, as set forth in claim 1, wherein the end of the external conductor is welded or bolted to the sacrificial anode member and the embedded conductor.
5. The corrosion prevention device for the sacrificial anode of the steel pipe pile of the cross-sea bridge is characterized by further comprising a cathode monitoring system, wherein the cathode monitoring system comprises a control box, a monitoring cable and a protection potential probe, the control box is arranged above a designed high water level of a pier body, the protection potential probe is arranged below back cover concrete of a bearing platform, and the monitoring cable is bound on a reinforcement cage of the pier body.
6. The corrosion prevention device for the sacrificial anode of the steel pipe pile of the cross-sea bridge is characterized in that the embedded conductor is arranged on the top of the bearing platform.
7. The corrosion prevention device for the sacrificial anode of the steel pipe pile of the cross-sea bridge is characterized in that the embedded conductor is made of electrically connected flat steel.
8. The corrosion prevention device for the sacrificial anode of the steel pipe pile of the cross-sea bridge, as set forth in claim 1, wherein the sacrificial anode member is a Zn-AI-Cd type zinc alloy sacrificial anode block.
9. The corrosion prevention device for the sacrificial anode of the steel pipe pile of the cross-sea bridge, as set forth in claim 1, wherein the outer periphery of the sacrificial anode member is wrapped with an anode filler bag.
10. The sacrificial anode corrosion prevention device for the steel pipe piles of the cross-sea bridge according to claim 1, wherein the number of the sacrificial anode corrosion prevention devices is two groups at the position corresponding to each steel pipe pile.

Description

Corrosion prevention device for sacrificial anode of steel pipe pile of cross-sea bridge Technical Field The utility model relates to the technical field of marine engineering corrosion prevention, in particular to a sacrificial anode corrosion prevention device for a steel pipe pile of a cross-sea bridge. Background Steel structures widely applied in ocean engineering face seawater corrosion threat for a long time, the average annual corrosion speed reaches 0.3-0.4 mm, and local corrosion even exceeds 1.0 mm/year, so that the structural safety and the service life are directly affected. For pile foundation steel pipes with a design life of 35 years, sacrificial anode protection systems are currently commonly adopted as anti-corrosion measures. However, the existing installation mode needs to directly weld the anode on the steel pipe pile, when the mud surface of the construction area is too shallow, the anode cannot be directly installed after pile sinking, underwater welding operation must be performed by divers, the construction period is prolonged, and serious potential safety hazards exist. The traditional corrosion prevention technology has obvious limitations of high sacrificial anode consumption speed, short service life and high replacement cost, easy aging and falling of an organic coating, high maintenance frequency, dependence on continuous power supply in impressed current cathodic protection, and complex maintenance and over-protection risks. In order to meet the hundred-year service life requirement, the current scheme adopts the combination protection of the coating and the sacrificial anode, wherein the high-performance coating is mainly used at the initial stage and the sacrificial anode is used as the auxiliary, and the thickness redundancy of the sacrificial anode and the steel material is mainly changed at the later stage and the coating is used as the auxiliary. However, in practical application, the scheme has the defect of non-replaceable anode systems, and the steel member still has the problem of rust thinning after the anode is exhausted. These unsolved technical difficulties restrict the durability guarantee capability of the ultra-long life marine engineering structure. Disclosure of utility model The utility model aims to solve the main technical problem of providing a sacrificial anode corrosion prevention device for a steel pipe pile of a cross-sea bridge, which has a simple connection structure and a simple installation mode so as to improve the construction efficiency and the construction safety. In order to solve the technical problems, the utility model provides a sacrificial anode corrosion prevention device for a steel pipe pile of a cross-sea bridge, which is arranged on a bearing platform electrically connected with the steel pipe pile. The device comprises an embedded conductor, an external conductor and a sacrificial anode piece; The embedded conductor part is embedded in the bearing platform and is connected with reinforcing steel bars in the bearing platform, the sacrificial anode piece is embedded in a seabed covering layer on the side part of the bearing platform, the external conductor is of a rigid structure which is locally attached to the surface of the bearing platform, one end of the external conductor is connected with the part of the embedded conductor, which exposes out of the bearing platform, and the other end of the external conductor is connected with the sacrificial anode piece. In a preferred embodiment, the external conductor is configured as a space structure with a plurality of bending sections. In a preferred embodiment, the bottom of the external conductor is configured in an L-shape in the horizontal direction to connect with the sacrificial anode member in a direction parallel to the surface of the platform. In a preferred embodiment, the end of the external conductor is welded or bolted to the sacrificial anode member and the embedded conductor. In a preferred embodiment, the system further comprises a cathode monitoring system, wherein the cathode monitoring system comprises a control box, a monitoring cable and a protection potential probe, the control box is arranged above a designed high water level of a pier body, the protection potential probe is arranged below back cover concrete of a bearing platform, and the monitoring cable is bound on a pier body reinforcement cage. In a preferred embodiment, the pre-buried conductor is arranged on top of the platform. In a preferred embodiment, the pre-buried conductor is an electrically connected flat steel. In a preferred embodiment, the sacrificial anode member is a Zn-Al-Cd type zinc alloy sacrificial anode block. In a preferred embodiment, the sacrificial anode member is peripherally wrapped with an anode filler bag. In a preferred embodiment, the device is arranged in two groups at positions corresponding to each steel pipe pile. Compared with the prior art, the utility model discloses te