Fixed-bottom suction bucket foundation methodThe suction bucket foundation method can be used where a thin sedimentary layer covers bedrock. It does not require large construction machinery, an advantage that reduces both environmental impact and installation costs. We have been conducting verification tests on an actual machine basis since 2022.consideration of marine areas used by the fishing industry, we are developing mooring technology for TLP-type floating structures that reduces the number of mooring components. The process of developing these technologies begins with desktop studies and analysis, followed by large soil-tank experiments, and finally large-scale experiments in actual open waters. The greatest strength of technology development at Toyo Construction is that it does not stop at the laboratory level. We conduct experiments and verification in the actual field, and we increase the reliability of our technology through experiments in actual marine environments.for burying subsea cables near and farther off the coast of Japan. In addition, while projects to commercialize offshore wind power are unfolding steadily in various sea areas, the domestic supply chain, particularly the number of work vessels, is insufficient to handle the large number of projects. Therefore, we are considering collaboration on work vessels with Singapore-based Cyan Renewables and the France-based Jifmar Group. Furthermore, we will complement reciprocal use of vessels necessary for offshore wind power construction MonopileMost commonAuxiliary method requiredLowSome components cannot be removed or removal method must be developedTOYO CONSTRUCTION I INTEGRATED REPORT 2024 Gravity based Not manyYesExtremely highYes, but requires dismantling and incurs costs for associated processesMinimalSedimentary layerRock, etc.A few projects overseasSmall amountJacketManyAuxiliary method requiredModerately highConcreteRubble moundTransition pieceMonopileScour protection Sedimentary layerJacketScour protectionPin pileRockStudies, mitigation measures may be neededSuction bucketThin sedimentary layerAim to be lowestYesSpecial Feature 1: Offshore Wind Power Construction BusinessDomestic offshore wind power construction requires the application of various new technologies. But we must remember that Japan is subject to earthquakes, tsunami, typhoons, and other natural phenomena that carry significant risk to operations. Ground conditions are extremely complex and rock layers are harder than in Europe, where wind power is better established, so offshore wind power construction is said to be more difficult in Japan than in Europe. To shorten technology development times and rein in development costs, we adapt leading European technologies to match Japanese conditions. One example is fixed-bottom type construction. We are developing suction foundation technology that can handle the complex soil conditions of Japan. Also, in We are also eager to reinforce our supply chain in terms of technology, ships, and O&M (offshore wind power maintenance and management) by collaborating with domestic and overseas partner companies. Since there is little information about the seabed in the open ocean areas where offshore wind power construction projects take place, it is important to evaluate the risks and feasibility of construction in advance. We worked together with Kiso-Jiban Consultants Co., Ltd., to perform geotechnical surveys and engineering services and establish risk assessment methods Typical foundation structuresTrack recordCoping with bedrockCostNoise and vibrationRemovabilityAdapting and introducing advanced technologies from Europe to suit harsh conditions in JapanStrengthening business structure by collaborating with domestic and overseas companies24
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