A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
SEDIMENT DISCHARGE DEVICE AND SEDIMENT DISCHARGE METHOD
PROBLEM TO BE SOLVED: To smoothly remove accumulated sediment irrespective of character of the accumulated sediment.SOLUTION: A tube 20 which is formed with a continuous slit-like opening part 22a along a longitudinal direction extends in a depth direction in accumulated sediment 14, and a lower end 22aL of the opening part 22a is defined at a predetermined depth. An output side end 20B of the tube 20 is disposed outside a dredging area. A flow of water W in the tube 20 generates a negative pressure at the opening part 22a which is exposed in an under water part 16 where an upper end 22aU is higher than an accumulating face 14S of the accumulated sediment 14 and the water W is sucked into the tube 20 from the opening part 22a. And the flow of the water W into the tube 20 from the opening part 22a imparts a shear force to the accumulated sediment 14, and the accumulated sediment 14 is sucked into the tube 20 via the opening part 22a from a surface layer part 14S of the accumulated sediment 14. Once the suction of the surface layer part 14S of the accumulated sediment 14 into the tube 20 begins, the erosion proceeds toward the deeper in the accumulated sediment 14.
【課題】堆積土砂の性状に影響を受けることなく、堆積土砂の除去を円滑に行う。【解決手段】長手方向に沿って連続するスリット状の開口部２２ａを設けた管２０は、堆積土砂１４内部を深部方向へと延び、所定深さにおいて開口部２２ａの下端２２ａＬが定められている。又、管２０の出口側端部２０Ｂが、浚渫地域の外部に設置されている。管２０内の水Ｗの流れにより、上端２２ａＵが堆積土砂１４の堆積面１４Ｓよりも高い水中部１６に露出した、開口部２２ａに負圧が生じ、開口部２２ａから管２０内へと水Ｗが吸引される。そして、開口部２２ａから管２０内への水Ｗの流れが、堆積土砂１４にせん断力を付与し、堆積土砂１４の表層部１４Ｓから開口部２２ａを介して管２０内へと堆積土砂１４が吸引される。堆積土砂１４の表層部１４Ｓの管２０内への吸引が一旦始まると、堆積土砂１４の深部へと侵食が進行して行く。【選択図】図１
SEDIMENT DISCHARGE DEVICE AND SEDIMENT DISCHARGE METHOD
PROBLEM TO BE SOLVED: To smoothly remove accumulated sediment irrespective of character of the accumulated sediment.SOLUTION: A tube 20 which is formed with a continuous slit-like opening part 22a along a longitudinal direction extends in a depth direction in accumulated sediment 14, and a lower end 22aL of the opening part 22a is defined at a predetermined depth. An output side end 20B of the tube 20 is disposed outside a dredging area. A flow of water W in the tube 20 generates a negative pressure at the opening part 22a which is exposed in an under water part 16 where an upper end 22aU is higher than an accumulating face 14S of the accumulated sediment 14 and the water W is sucked into the tube 20 from the opening part 22a. And the flow of the water W into the tube 20 from the opening part 22a imparts a shear force to the accumulated sediment 14, and the accumulated sediment 14 is sucked into the tube 20 via the opening part 22a from a surface layer part 14S of the accumulated sediment 14. Once the suction of the surface layer part 14S of the accumulated sediment 14 into the tube 20 begins, the erosion proceeds toward the deeper in the accumulated sediment 14.
【課題】堆積土砂の性状に影響を受けることなく、堆積土砂の除去を円滑に行う。【解決手段】長手方向に沿って連続するスリット状の開口部２２ａを設けた管２０は、堆積土砂１４内部を深部方向へと延び、所定深さにおいて開口部２２ａの下端２２ａＬが定められている。又、管２０の出口側端部２０Ｂが、浚渫地域の外部に設置されている。管２０内の水Ｗの流れにより、上端２２ａＵが堆積土砂１４の堆積面１４Ｓよりも高い水中部１６に露出した、開口部２２ａに負圧が生じ、開口部２２ａから管２０内へと水Ｗが吸引される。そして、開口部２２ａから管２０内への水Ｗの流れが、堆積土砂１４にせん断力を付与し、堆積土砂１４の表層部１４Ｓから開口部２２ａを介して管２０内へと堆積土砂１４が吸引される。堆積土砂１４の表層部１４Ｓの管２０内への吸引が一旦始まると、堆積土砂１４の深部へと侵食が進行して行く。【選択図】図１
SEDIMENT DISCHARGE DEVICE AND SEDIMENT DISCHARGE METHOD
土砂排出装置及び土砂排出方法
KIKUCHI RYOSUKE (author) / KATAYAMA HIROYUKI (author) / ISHII AYUMI (author) / YASUI HIDENORI (author) / NISHIKAWA HIROSHI (author) / HONDA MASAHITO (author) / KUBO SHIGERU (author) / IWATA HIDEKI (author) / TAKAHAMA TAKAYUKI (author) / SHINTANI SATOSHI (author)
2015-08-20
Patent
Electronic Resource
Japanese
IPC:
E02F
Baggern
,
DREDGING
SEDIMENT DISCHARGE DEVICE, AND TRACK EXTENSION METHOD FOR SEDIMENT DISCHARGE DEVICE
| European Patent Office | 2019