MEGAMOVE successfully shipped domestic large-scale offshore wind power composite barrel foundation

发布日期:2019-06-10 18:13
Recently, MEGAMOVE successfully completed the shipment of large-scale domestic offshore wind power composite cylindrical foundation.

The two composite cylindrical foundation structures shipped this time are composed of the lower cylindrical foundation and the upper pipe pile. The total weight of a single cargo is about 2,200 tons, the diameter is 36m, and the height is 62m. It is currently the largest composite cylindrical foundation for domestic offshore wind power. .

As the carrier, Wanyi conducted detailed technical exchanges and calculations before the start of the project, and formulated a careful implementation plan. According to the proposed shipping plan, after the stern of the barge enters the harbor basin, the SPMT crew will be mobilized to the barge deck to stand by; the gantry crane will lift the first composite cylindrical foundation structure and place it on the temporary support structure of the barge stern deck, and the SPMT will go in and lift it up. Pick up, transport forward to the predetermined position, and unload to the support structure; then the gantry crane lifts the second composite cylindrical foundation structure onto the ship, and the SPMT enters the car roof again to pick up and transport, transports forward to the predetermined position and then unloads. After the transshipment work is completed, SPMT evacuates the deck, implements cargo lashing, and the barge will be transported to the wind turbine installation position.

This project is a great challenge for all heavy transport companies. Compared with land loading, barge loading is affected by wind, waves, currents and tides, and the barge itself is dynamic and unstable, resulting in more uncertainties in SPMT loading and transportation operations. During the jacking process, as the load of the SPMT increases, the deck structure of the barge will deform, affecting the stability of the jacking; during the transshipment process, with the movement of the SPMT and the cargo, the overall mass distribution of the barge changes, requiring precise control and adjustment of the pressure by the SPMT. When unloading and placing, it is necessary to pay close attention to the change of the gap between the cargo and the supporting structure and adjust it in real time. To put it vividly, it is to catch 2,200 tons of cargo on a spring cushion and move it to the designated location. This difficult operation is very challenging in China.

In the scheme design stage, Wanyi took into account the characteristics and difficulties of this task, comprehensively considered the structural characteristics of the composite cylindrical foundation and the performance of SPMT, and carried out targeted preparations and careful deployment. When working on the barge, focus on cooperating with the vehicle and ship cooperation during the shifting process of the cargo carried by SPMT on the barge, as well as the progress of the jacking and unloading process, to ensure that risk points can be identified and controlled. 

The situation on the scene is always full of variables. After SPMT was mobilized to the deck of the barge, it was notified by the customer that the situation had changed and the original shipment plan could not be implemented. After understanding, it is known that the barge stern structure is weak, and the deck structure under the temporary support structure is not strong enough to fully bear the weight of the composite cylindrical foundation. The site required Wanyi to cooperate with SPMT to formulate a solution for transferring the composite tubular foundation from the crane to the barge as soon as possible. Delays in construction mean increased costs. Wanyi acted quickly and organized technical forces to study solutions. After tense and scientific discussions, Wanyi worked with the client to draw up a new shipping plan: the crane, barge and SPMT work together, and within the capacity of the barge, the crane first transfers part of the weight to the temporary support structure step by step. Then the SPMT gradually lifts the weight on the supporting structure; the crane further releases the weight, the barge adjusts its attitude with ballast, and the SPMT is lifted again for transportation. This is carried out in stages until all the weight of the cargo is transferred to the SPMT, the crane is unhooked, and the SPMT transfers the cargo to the predetermined location.

Compared with the original plan, the operation difficulty of SPMT in the new plan is greatly increased, and the operation process is like standing on a spring to carry porcelain. But time waits for no one. After repeated sand table deduction, Wan Yi believed that the risk was controllable, so he decided to face the difficulties and take over this important task.

In the biting cold wind, Wanyi's on-site team was calm and calm, and worked closely with the operators of the crane and barge to transfer the composite tubular foundation from the crane to the SPMT step by step according to the scheduled plan, and then transferred and unloaded to the pre-installed site. on the supporting structure on the barge. Afterwards, the second composite cylindrical foundation was also picked up and transported into place. Wanyi successfully completed this major task.

Careful preparation and careful organization; Adhere to the basic principle of safety first, relying on its own strong technical force and rich field experience, Wanyi will help customers overcome difficulties to the greatest extent with excellent technology, superb engineering management ability, courage and adaptable work style , to ensure the smooth completion of the entire project. In the end, we will live up to our trust and win the trust of our customers.


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