On June 19, the extension and reconstruction project of No.2 dry dock and the construction of the thin plate workshop for large cruise ship project were completed and delivered successively.
Completion and delivery of the extension project of No.2 dry dock
From October 2018 to June 19, 2020, it costs SWS 20 months to complete the extension and reconstruction project of No. 2 dry dock. This is the first infrastructure renovation project launched by SWS in order to adapt to the construction of large-scale cruise ships. It is designed by NDRI, a subsidiary under CSSC, and the construction is undertaken by CCCC Third Harbor Engineering Co., Ltd.
The project is to extend the existing dock from 540 meters to 200 meters on the land side, forming a 740 meter long and 76 meter wide "Giant" dock with a circumference of 1.632 kilometers and an area equivalent to seven standard football fields. It can meet the needs of general assembly of one large cruise ship and outfitting of one large cruise ship at the same time, and meet the construction requirements of an annual output of one and a semi large cruise ship.
Different from ordinary ships, the design and construction of large cruise ships can be regarded as building a small city floating at sea. Dry dock is the most important yard facility for shipbuilding and repair, and its size directly determines the dimensions of the ship to be built, and the construction of large cruise ships is inseparable from the core resource of dock.
In order to meet the requirements of perfect technology, reasonable construction, environmental protection and energy conservation of large cruise ships, all participating units cooperate with each other to tackle difficulties, shorten the construction period, reduce costs, guarantee quality and safety, and ensure high-quality completion of the project through a series of measures such as optimizing the design scheme, innovating the process and construction method, and coordinating the construction management. Especially during the COVID-19 epidemic prevention and control period, all participating units attached equal importance to epidemic prevention and production. In late February, SWS organized and held a high-level special meeting on epidemic prevention and work resumption of key construction projects of large-scale cruise ships. In conjunction with relevant design and construction units, SWS carried out detailed discussion, coordination and deployment on the management of project EPC unit, screening of returned employees, distribution of epidemic prevention materials, implementation of the project plan, and work safety after resumption of work. Each person in charge of the three parties acted as the commander to charge and supervise the implementation of various measures such as epidemic prevention and control, work resumption, etc., so as to ensure the resumption of the project and the completion of the milestones in a safe and orderly manner. After unremitting efforts, SWS finally ushered in the important milestone of the completion and delivery of the "world's longest dock special for large cruise ship" on schedule, laying a solid foundation for the first domestic large cruise ship, a national strategic key project, also the "No.1 Project" of CSSC.
The reconstructed dock paves the way for keel laying of the first domestic large cruise ship that is at the end of this year. At present, the cruise ship project is progressing step by step in an orderly manner.
In March, the construction of the first block started; in April, a special technical team was set up to tackle key problems such as weight & gravity center, safe return to port, vibration and noise, and the turning phase (consecutive commencement)of the thin-plate blocks of the first large cruise ship was approved; in May, the first thin plate block realized the delivery milestone according to plan, indicating that the thin plate workshop has formed product production capacity; the delivery of the first batch of process equipment of the thin plate workshop provides equipment support for orderly promotion of the large-scale cruise project; in June, the phase II interior decoration project of the L3 Mock-up of the large cruise project was fully launched, and the outfitting work of the first block was officially started.
Completion and delivery of the thin plate workshop
It took 18 months for the thin plate workshop for the first large cruise ship built in China to be completed and delivered, laying a solid foundation for its service in the second half of the year.
The thin plate workshop project is one of the important supporting projects of the domestic large cruise project. It is 450 meters long and 111 meters wide, with a total construction area of 54,396 square meters and a maximum column spacing of 42 meters. It is composed of steel yard, steel pretreatment workshop, cutting and prefabrication workshop, component manufacturing workshop, block production workshop, as well as water/, electricity/, gas supply, road paving and other offsite supporting projects. It is listed as a major project in Shanghai.
Due to the heavy workload of the built-in parts in the base for the cruise assembly line and the construction difficulty in the equipment foundation and epoxy floor, especially the GLB milling station for the key equipment of the assembly line, the installation process of built-in parts needs to be formulated on site. In order to eradicate the "dead corners" during concrete pouring, the construction progress must be accelerated to save time for installation of GLB’s equipment while ensuring the quality. During the construction, measures such as improving the concrete grade of the equipment foundation, three times of continuous pouring and tamping technology, process precision positioning and other measures were taken to ensure the timely mobilization and installation of the connectors of GLB equipment in the panel assembly station. During this period, a large number of new technologies and methods were applied. Such as the use of large-span beam lifting method, 3D graphics based, object-oriented, architecture related, computer-aided design of BIM model technology, creation of 3D model, automatic generation of detailed steel structure and various statements, TEKLA modeling technology which provides convenient view function. All these help catch up with the construction schedule, achieve production and efficiency, and deliver a quality product.
In order to put the thin plate workshop into operation as soon as possible, SWS has adopted the strategy of "synchronous construction, training and trial production", which has achieved twice the result with half the effort. At present, some of the stations have been put into trial production, and the first batch of 10 thin plate blocks were delivered in the same month.
