CN-121976532-A - Single pile foundation drag reduction removing system and method

CN121976532ACN 121976532 ACN121976532 ACN 121976532ACN-121976532-A

Abstract

The application relates to the technical field of offshore wind power engineering foundation construction, in particular to a single pile foundation drag reduction removal system and a single pile foundation drag reduction removal method, wherein the single pile foundation drag reduction removal system comprises an electroosmosis system and a vacuum system, the electroosmosis system comprises a power supply and graphite electrodes, the graphite electrodes are circumferentially distributed around a pile foundation, the positive electrode of the power supply is electrically connected with the pile foundation, and the negative electrode of the power supply is electrically connected with the graphite electrodes; the vacuum system comprises a sealing assembly and a pump assembly, the sealing assembly is arranged at the radial section of the pile foundation and is provided with a channel communicated with the interior of the pile foundation, and the pump assembly is communicated with the sealing assembly and is used for vacuumizing the interior of the pile foundation through the sealing assembly. The soil intensity of soil around the pile is reduced by combining electroosmosis and vacuumizing, the synergistic effect of electroosmosis softening and vacuum seepage can effectively reduce pile pulling resistance, the force effect except pile pulling can not be added to the pile body during implementation, additional vibration or impact load is not applied to the pile foundation, meanwhile, the risk of pile body damage is reduced, the pile foundation recovery integrity is improved, and noise is reduced.

Inventors

ZHANG XU
WU SI
Wu Kenfeng
Liu Sidie
ZHANG BIN

Assignees

射阳龙源风力发电有限公司

Dates

Publication Date: 20260505
Application Date: 20251211

Claims (10)

1. A mono-pile foundation drag reducing and removing system, comprising: The electroosmosis system comprises a power supply and graphite electrodes, wherein the graphite electrodes are circumferentially distributed around the pile foundation, the positive electrode of the power supply is electrically connected with the pile foundation, and the negative electrode of the power supply is electrically connected with the graphite electrodes; The vacuum system comprises a sealing assembly and a pump assembly, wherein the sealing assembly is arranged at the radial section of the pile foundation and is provided with a channel communicated with the interior of the pile foundation, and the pump assembly is communicated with the sealing assembly and is used for vacuumizing the interior of the pile foundation through the sealing assembly.
2. The mono-pile foundation drag reduction removal system of claim 1, wherein a water molecule enrichment sensor is arranged on the graphite electrode, the electroosmosis system further comprises a first electric signal feedback adapter, the water molecule enrichment sensor is connected with the first electric signal feedback adapter through a first electric signal transmission line, and a first electric signal amplifier is arranged on the first electric signal transmission line.
3. The mono-pile foundation drag reducing removal system of claim 1, wherein the ram assembly comprises: The pile cap can be arranged at the radial section of the pile foundation, and the pile cap is provided with a mixture inlet to be exhausted; and the valve is arranged at the position of the mixture inlet of the liquid to be exhausted and is communicated with the pump assembly through the mixture pipeline of the liquid to be exhausted.
4. The mono-pile foundation drag reducing and removing system of claim 3, wherein the valve is connected to a valve control circuit through a second electrical signal transmission circuit, the valve control circuit comprising a second electrical signal amplifier, a second electrical signal feedback adapter and an electrical box connected in sequence; and/or the valve is also connected with a pressure gauge.
5. The single pile foundation drag reduction removal system of claim 3, wherein the sealing assembly further comprises a connecting hoop, the connecting hoop is located at the joint of the pile cap and the pile foundation and sleeved on the outer wall of the pile cap and the pile foundation and used for connecting the pile cap and the pile foundation, the connecting hoop comprises an outer layer steel pipe and an inner layer rubber sealing plug, the connecting hoop comprises two symmetrically arranged half hoops, one ends, close to each other, of the two half hoops are respectively provided with a butt joint end, and the two butt joint ends are connected through a locking bolt.
6. The mono-pile foundation drag reducing and removing system of claim 3, wherein the lower end face of the pile cap is provided with a filter layer.
7. The single pile foundation drag reducing and removing system of claim 3, wherein the lower end face of the pile cap is formed with a mating ring groove matching the outer wall of the pile foundation, and sealing rubber is disposed in the mating ring groove.
8. The single pile foundation drag reduction removal system of claim 3, wherein the upper end face of the pile cap is provided with a sling and an auxiliary sling, the sling is fixed in the center of the pile cap, and the sling is positioned around the sling.
9. The mono-pile foundation drag reducing removal system of any of claims 3-8, wherein the pump assembly comprises: the inlet of the vacuum tank is connected with the liquid mixture to be exhausted through a pipeline; The inlet of the vacuum pump is connected with the upper end of the vacuum tank; the inlet of the gas-water separator is connected with the outlet of the vacuum pump, and the water outlet of the gas-water separator is connected with the total drainage pipeline; the inlet of the water pump is connected with the lower end of the vacuum tank, and the outlet of the water pump is connected with the total drainage pipeline.
10. A method of single pile foundation drag reduction removal employing the single pile foundation drag reduction removal system of any one of claims 1-9, the method comprising: Cutting off the part above the water surface of the pile foundation; Installing a sealing component on a tangent plane of the pile foundation; starting an electroosmosis system to enable pore water to flow from pile foundations to surrounding soil; after the electroosmosis system is stable, starting a pump assembly, vacuumizing the pile foundation to form a seepage channel inside, and discharging water outside the pile-soil interface through the seepage channel inside the pile foundation; after the electroosmosis system and the vacuum system reach the working requirements, the pile foundation is pulled up from the soil through an external pile pulling device.

Description

Single pile foundation drag reduction removing system and method Technical Field The application relates to the technical field of offshore wind power engineering foundation construction, in particular to a single pile foundation drag reduction removal system and method. Background In the scenes of dismantling an offshore wind turbine, replacing ocean engineering pile foundations and the like, a seabed soil body often has complex characteristics of high water content and high binding force, so that the traditional pile pulling process faces the core problem of overlarge pile-soil interface binding force, and the problems of pile foundation fracture, low recovery efficiency and the like are easily caused. The currently mainstream drag reduction removal technology has significant drawbacks: The mechanical excavation method has strong construction disturbance, is easy to cause the large-scale settlement of the seabed soil mass and the marine ecological damage, is limited by space in pile foundation operation, and greatly reduces the efficiency; the chemical grouting method relies on expensive chemical agents, has high cost, and simultaneously, the grouting process and residues are easy to pollute the marine environment, thus preventing the subsequent ecological restoration; The vibration pile pulling method has high vibration frequency and high noise, not only disturbs the existence of marine organisms such as fishes, mammals and the like, but also can damage the pile body structure and increase the pile foundation fracture risk. The technology does not accurately regulate and control the characteristics of the seabed soil body, cannot balance the drag reduction effect, the environment protection requirement and the operation efficiency, and is difficult to meet the construction requirement in the limited offshore space. Disclosure of Invention The application provides a single pile foundation drag reduction removing system and method, which are used for solving the problems of high resistance and low efficiency in the single pile foundation removing process in the prior art. In one aspect, the present application provides a mono-pile foundation drag reducing and removing system comprising: the electroosmosis system comprises a power supply and graphite electrodes, the graphite electrodes are circumferentially distributed around the pile foundation, the positive electrode of the power supply is electrically connected with the pile foundation, and the negative electrode of the power supply is electrically connected with the graphite electrodes; the vacuum system comprises a sealing assembly and a pump assembly, wherein the sealing assembly is arranged at the radial section of the pile foundation and is provided with a channel communicated with the interior of the pile foundation, and the pump assembly is communicated with the sealing assembly and is used for vacuumizing the interior of the pile foundation through the sealing assembly. In one possible design, the graphite electrode is provided with a water molecule enrichment sensor, the electroosmosis system further comprises a first electric signal feedback adapter, the water molecule enrichment sensor is connected with the first electric signal feedback adapter through a first electric signal transmission line, and the first electric signal transmission line is provided with a first electric signal amplifier. In one possible design, the closure assembly comprises: the pile cap can be arranged at the radial section of the pile foundation, and a mixture inlet to be exhausted is formed in the pile cap; the valve is arranged at the position of the inlet of the mixture of the liquid to be exhausted and is communicated with the pump assembly through the pipeline of the mixture of the liquid to be exhausted. In one possible design, the valve is connected to the valve control circuit by a second electrical signal transmission circuit, the valve control circuit comprising a second electrical signal amplifier, a second electrical signal feedback adapter and an electrical box connected in sequence; and/or the valve is also connected with a pressure gauge. In one possible design, the sealing assembly further comprises a connecting hoop, the connecting hoop is located at the joint of the pile cap and the pile foundation and sleeved on the outer wall of the pile cap and the pile foundation and used for connecting the pile cap and the pile foundation, the connecting hoop comprises an outer layer steel pipe and an inner layer rubber sealing plug, the connecting hoop comprises two symmetrically arranged half hoops, butt joint ends are respectively arranged at one ends, close to the two half hoops, of the two half hoops, and the two butt joint ends are connected through a locking bolt. In one possible design, the lower end face of the pile cap is provided with a filter layer. In one possible design, the lower end face of the pile cap is formed with a mating ring groove matched