CN-122013774-A - Construction equipment and construction process for scouring and repairing fluid solidified soil of offshore wind turbine foundation

CN122013774ACN 122013774 ACN122013774 ACN 122013774ACN-122013774-A

Abstract

The invention relates to the field of fluid-state solidified soil testing devices, in particular to construction equipment and a construction process for flushing and repairing fluid-state solidified soil of an offshore wind turbine foundation, comprises a water carrying carrier and a material mixing tank arranged on the carrier a water adding stirring tank, a material conveying pipeline, a material conveying pump, a slurry conveying mechanism the device comprises a fluid solidified soil scouring performance testing device, a solidified soil rotary rheometer, a fluidity test bed, a detection material taking mechanism and a control center. The construction device provided by the invention is a complete technical system covering performance integrated test-on-site construction real-time detection-complex environment coupling simulation, effectively solves the double problems of research and development lag of a fluid-state solidified soil material and insufficient on-site repair quality control, and ensures the safety and reliability of a flushing repair project of an offshore wind turbine foundation.

Inventors

DAI SONG
LIN MINGBAO
HAN BO
ZHANG QINGSONG
ZHANG ZHISHUAI
YU XINRAN
LU WEI
Gong Xiucai

Assignees

山东大学

Dates

Publication Date: 20260512
Application Date: 20260415

Claims (10)

1. The construction equipment for flushing and repairing the fluid solidified soil on the offshore wind turbine foundation is characterized by comprising an offshore wind turbine foundation flushing and repairing fluid solidified soil construction equipment, a water carrying carrier, a material mixing tank, a water adding stirring tank, a conveying pipeline, a conveying pump, a slurry conveying mechanism, a fluid solidified soil flushing performance testing device, a solidified soil rotary rheometer, a fluidity testing table, a detection material taking mechanism and a control center, wherein the material mixing tank, the water adding stirring tank, the conveying pipeline, the conveying pump, the slurry conveying mechanism and the control center are arranged on the carrier, and the construction equipment comprises: The material mixing tank and the water adding stirring tank are arranged side by side and are connected through the material conveying pipeline, and the material conveying pump is arranged on the material conveying pipeline; the slurry conveying mechanism is arranged at one side of the water adding stirring tank and is connected with the water adding stirring tank; the fluid solidified soil scouring performance testing device, the solidified soil rotary rheometer, the fluidity test bed and the detection reclaiming mechanism are all arranged at one end of the water adding stirring tank; the control center is at least connected with the material conveying pump, the slurry conveying mechanism, the fluid solidified soil scouring performance testing device, the solidified soil rotary rheometer, the fluidity test bed and the material detecting and taking mechanism.
2. The offshore wind turbine foundation scouring repair flow state solidified soil construction equipment of claim 1, wherein stirring mechanisms are arranged in the material mixing tank and the water adding stirring tank.
3. The offshore wind turbine foundation washout repair flow state solidified soil construction equipment according to claim 1, further comprising a raw material feeding mechanism arranged at one end of the material mixing tank, or further comprising a cleaning mechanism.
4. The offshore wind turbine foundation scouring repair flow state solidified soil construction equipment according to any one of claims 1-3 is characterized in that the slurry conveying mechanism comprises a supporting rack, a first folding arm, a second folding arm, a first oil cylinder, a second oil cylinder, a pumping pipeline, a material conveying connecting pipe and a slurry conveying pump, wherein the tail end of the first folding arm is rotatably connected to the supporting rack, the head end of the first folding arm is hinged to the tail end of the second folding arm, the first oil cylinder is located below the first folding arm, the bottom end and a telescopic rod of the first oil cylinder are rotatably connected with the supporting rack and the first folding arm respectively, the bottom end and the telescopic rod of the second oil cylinder are rotatably connected with the first folding arm and the second folding arm respectively, the pumping pipeline is arranged along the trend of the first folding arm and the second folding arm, one end of the pumping pipeline is connected with the material conveying connecting pipe, the other end of the material conveying connecting pipe is connected with the water adding stirring pool, and the slurry conveying pump is arranged on the material conveying connecting pipe.
5. A construction process for flushing and repairing fluid solidified soil on an offshore wind turbine foundation, which is performed based on the construction equipment as claimed in any one of claims 1 to 4, and comprises the following steps: S1, integrally carrying construction equipment to a preset water surface position through the water carrying carrier; then, the mixture is conveyed into a water adding stirring tank by utilizing the conveying pipeline and the conveying pump, water is added into the water adding stirring tank for stirring to prepare the fluid state solidified soil slurry, and a sensor in the water adding stirring tank sends a signal to a control center after detecting that the slurry reaches a uniform state, and meanwhile, stirring is stopped; S2, the control center sends instructions to a fluid solidified soil scouring performance testing device, a solidified soil rotary rheometer, a fluidity test bed and a detection material taking mechanism to start working, and the detection material taking mechanism collects slurry from a water adding stirring pool and respectively adds the slurry into the fluid solidified soil scouring performance testing device, the solidified soil rotary rheometer and the fluidity test bed to carry out various detections; s3, guiding the preparation of the fluid-state solidified soil slurry by adopting a single elimination and multiple verification mechanism: the single item elimination is that when the test result of any one of the above-mentioned various tests does not reach the corresponding qualification standard, the test is immediately stopped, at this time, the control center instructs the water adding stirring pool to continue stirring, and after the completion, the test is carried out by sampling again until each test result of the above-mentioned various tests reaches the qualification standard, and the test of this round is completed; Multiple verification, namely pumping the fluid solidified soil slurry in the water adding stirring tank not immediately after the detection of the current round is finished, and randomly continuing sampling to perform the next round of detection, wherein the single phase elimination mechanism is followed in the detection process; s4, the control center sends a starting instruction to the slurry conveying mechanism, and the fluid solidified soil slurry in the water adding stirring pool is pumped to the bottom of the fan for repairing.
6. The offshore wind turbine foundation washout repair fluid cured soil construction process according to claim 5, wherein in the step S3, the test comprises a dispersion resistance test performed by the fluid cured soil washout performance test device, a fluidity test performed by the cured soil rotary rheometer, and a rheological performance test performed by the fluidity test stand.
7. The construction process for flushing repair of fluid solidified soil of offshore wind turbine foundation according to claim 6, wherein the qualified standard requirement of the anti-dispersion is that the anti-dispersion rate is not less than 92%.
8. The construction process for flushing and repairing the fluid solidified soil on the offshore wind turbine foundation according to claim 6, wherein the standard qualification requirement of the fluidity is that the expansion diameter is less than or equal to 450mm and less than 600mm.
9. The construction process for flushing repair of fluid solidified soil on offshore wind turbine foundation according to claim 6, wherein the qualified standard requirements of rheological property comprise that yield strength is less than or equal to 75Pa and less than or equal to 150Pa, plastic viscosity is less than or equal to 15 Pa.s and less than or equal to 35 Pa.s, the yield strength and plastic viscosity are required to be qualified at the same time to judge that the rheological property is qualified, and if any index is not qualified, the rheological property is regarded as not being qualified.
10. The offshore wind turbine foundation washout repair flow state solidified soil construction process of claim 5, further comprising the step of cleaning the device.

Description

Construction equipment and construction process for scouring and repairing fluid solidified soil of offshore wind turbine foundation Technical Field The invention relates to the field of fluid-state solidified soil, in particular to construction equipment and a construction process for flushing and repairing the fluid-state solidified soil of an offshore wind turbine foundation. Background The disclosure of this background section is only intended to increase the understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art already known to those of ordinary skill in the art. In recent years, global offshore wind power engineering enters a high-speed development stage, accumulated installed capacity is continuously increased, a fan is evolved to be large-sized and deep-open-sea (such as a floating fan and a multi-pile foundation structure), and high requirements are provided for long-term service safety of the foundation structure. The offshore wind turbine foundation is exposed to a complex marine environment of wind-wave-current multi-field coupling for a long time, local scouring phenomenon is very easy to occur on a pile Zhou Hai bed, the burial depth of the wind turbine foundation can be obviously reduced, the bearing capacity and the vibration resistance of a foundation structure are weakened, and safety accidents such as inclination and collapse of the wind turbine can be possibly caused when the wind turbine foundation is serious, so that the offshore wind turbine foundation becomes one of core hidden hazards threatening the safe operation of offshore wind power. In the field of offshore wind turbine foundation scouring treatment, the traditional protection method (such as stone throwing, sand paving and the like) has the limitations of unstable protection effect, high treatment cost, poor adaptability to marine environment and the like. In recent years, the fluid-state solidified soil gradually becomes a preferable material for the flushing repair of the offshore wind turbine foundation by virtue of the advantages of excellent protection effect, good economy, environmental friendliness, strong engineering adaptability (being adaptable to different flushing pit forms) and the like. However, the inventor finds that the fluid-state solidified soil still faces two key technical bottlenecks in offshore scouring repair application, and the prior art system is difficult to effectively break through: 1. the method for testing the performance of the fluid-state solidified soil is deficient, the material research and development is delayed, the fluid-state solidified soil scouring repair technology is still in a starting stage, the material research and development and performance evaluation mainly depend on the traditional concrete testing method, and the comprehensive performance requirements of the offshore complex environment on the high flow, dispersion resistance and scouring resistance of the solidified soil cannot be matched. Meanwhile, aiming at wind-wave-flow-wind-flow coupling action of the deep-open-sea wind turbine, the traditional performance test under single load can not reflect stress and failure rules of solidified soil in a real service environment, so that the researched and developed fluid solidified soil material is very difficult to meet the long-term service period of the offshore wind turbine and the repairing requirement of a large amount of flushing pits (with the diameter of 25m and the depth of 7 m), and the large-scale application of the fluid solidified soil in flushing repairing is restricted. 2. The field construction process lacks system detection and control, and the repair quality is unstable, namely, the performance (such as fluidity, strength speed and anti-scour stability) of the fluidized solidified soil in the whole construction process from raw material mixing and stirring to pumping seabed repair is easily influenced by ocean environment (ocean current and tide) and construction parameters (stirring speed and conveying pressure) to fluctuate. However, the existing construction process depends on engineering experience, and lacks a systematic field detection and control system, so that the performance of solidified soil conveyed to the seabed does not reach the standard, the scouring repair effect is affected if the performance is light, secondary reworking is needed if the performance is heavy, and the engineering cost and the safety risk are increased. In addition, in the traditional offshore wind turbine foundation scouring repair technology, the problem of 'disjoint' exists in indoor performance test and field construction detection, the indoor test cannot guide field construction parameter optimization, the field detection is difficult to feed back to indoor material research and development, the technology is in closed loop deletion, and the app