Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
DREDGING METHOD INSIDE UNDERWATER TEMPORARY COFFERING STRUCTURE
PROBLEM TO BE SOLVED: To provide a dredging method that significantly reduces a discharged water volume, by temporarily storing water and sediment inside the temporary coffering structure in a temporary storage, circulating a part of the water back into the temporary coffering structure for eliminating inside/outside water pressure difference, and then driving the temporary coffering structure.SOLUTION: A high-pressure water injection nozzle and a suction nozzle of a jet pump are installed on a lower side of a temporary coffering structure, the jet pump being for sucking water and sedimentary soil. High-pressure water is injected from the injection nozzle while driving the temporary coffering structure into an underwater ground, for blowing away or dispersedly agitating the sedimentary soil. At the same time, the sedimentary soil is sucked along with water by the suction nozzle and discharged into a temporary storage. Only the water stored in the temporary storage is returned into the temporary coffering structure, making water surfaces inside and outside of the temporary coffering structure almost flush with each other. Thus, the temporary coffering structure is driven into the underwater ground, at the same time dredging inside the structure.SELECTED DRAWING: Figure 9
【課題】仮締切構造体内の水及び土砂を一旦仮置き場へ貯留し、その一部の水を循環させて仮締切体内へ戻し、内外の水圧差を無くした上で仮締切構造体を打ち込むことで、排出水量を大幅に低減することのできる浚渫工法を提供せんとするものである。【解決手段】仮締切構造体の下部側に高圧水の噴射ノズルと、水及び堆積土砂を吸引するジェットポンプの吸引ノズルとを設置し、仮締切構造体を水中地盤へ打ち込みながら前記噴射ノズルから高圧水を噴射して堆積土砂を吹き飛ばすか分散撹拌状態にすると共に、その堆積土砂を水と一緒に前記吸引ノズルから吸引して仮置き場へ排出し、仮置き場に貯留された水のみを仮締切構造体内へ戻して、仮締切構造体の内外の水面が略同一になるようにして仮締切構造体の水中地盤への打ち込みと、その内部の浚渫とを同時に行うようにした。【選択図】図９
DREDGING METHOD INSIDE UNDERWATER TEMPORARY COFFERING STRUCTURE
PROBLEM TO BE SOLVED: To provide a dredging method that significantly reduces a discharged water volume, by temporarily storing water and sediment inside the temporary coffering structure in a temporary storage, circulating a part of the water back into the temporary coffering structure for eliminating inside/outside water pressure difference, and then driving the temporary coffering structure.SOLUTION: A high-pressure water injection nozzle and a suction nozzle of a jet pump are installed on a lower side of a temporary coffering structure, the jet pump being for sucking water and sedimentary soil. High-pressure water is injected from the injection nozzle while driving the temporary coffering structure into an underwater ground, for blowing away or dispersedly agitating the sedimentary soil. At the same time, the sedimentary soil is sucked along with water by the suction nozzle and discharged into a temporary storage. Only the water stored in the temporary storage is returned into the temporary coffering structure, making water surfaces inside and outside of the temporary coffering structure almost flush with each other. Thus, the temporary coffering structure is driven into the underwater ground, at the same time dredging inside the structure.SELECTED DRAWING: Figure 9
【課題】仮締切構造体内の水及び土砂を一旦仮置き場へ貯留し、その一部の水を循環させて仮締切体内へ戻し、内外の水圧差を無くした上で仮締切構造体を打ち込むことで、排出水量を大幅に低減することのできる浚渫工法を提供せんとするものである。【解決手段】仮締切構造体の下部側に高圧水の噴射ノズルと、水及び堆積土砂を吸引するジェットポンプの吸引ノズルとを設置し、仮締切構造体を水中地盤へ打ち込みながら前記噴射ノズルから高圧水を噴射して堆積土砂を吹き飛ばすか分散撹拌状態にすると共に、その堆積土砂を水と一緒に前記吸引ノズルから吸引して仮置き場へ排出し、仮置き場に貯留された水のみを仮締切構造体内へ戻して、仮締切構造体の内外の水面が略同一になるようにして仮締切構造体の水中地盤への打ち込みと、その内部の浚渫とを同時に行うようにした。【選択図】図９
DREDGING METHOD INSIDE UNDERWATER TEMPORARY COFFERING STRUCTURE
水中の仮締切構造体内の浚渫工法
ASAI ICHIRO (Autor:in)
13.04.2017
Patent
Elektronische Ressource
Japanisch
Three-degree-of-freedom underwater dredging robot structure and dredging method
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