CORING SYSTEM, AND PISTON CORING METHOD
To provide a coring system allowing increase of member cost by member loss to be suppressed and performance hours for detention to be reduced through prevention of detention.SOLUTION: A coring system for sampling core for sampling by penetrating in the ground is provided with: a plurality of barrels...
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Format: | Patent |
Sprache: | eng ; jpn |
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Zusammenfassung: | To provide a coring system allowing increase of member cost by member loss to be suppressed and performance hours for detention to be reduced through prevention of detention.SOLUTION: A coring system for sampling core for sampling by penetrating in the ground is provided with: a plurality of barrels 2 connected with driving means placed on a seabed ground G; couplers 3 connecting the barrels 2 to each other; a core barrel 4 sampling the core for sampling which is placed on a lower end of the barrel 2; a penetration bit 5 attached on a tip of the core barrel 4; and a piston 6 arranged swingably in a shaft direction inside of the barrel 2 to press the core for sampling by applying pressure thereon, wherein concave grooves 31, 51 extending in a vertical direction are formed in an outer circumferential surface extending in a circumferential direction of the coupler 3 and the penetration bit 5.SELECTED DRAWING: Figure 2
【課題】抑留を防止することで、部材損失による部材コストの増大を抑え、抑留時にかかる作業時間の低減を図ることができる。【解決手段】地盤を貫入してサンプリング用コアを採取するためのコアリングシステムであって、海底地盤Gに配置される駆動手段によって複数本が連結されるバレル2と、バレル2同士を連結するカプラ3と、バレル2の下端に配置されサンプリング用コアを採取するコアバレル4と、コアバレル4の先端に装着された貫入用ビット5と、バレル2の内部で軸方向に摺動可能に設けられ、サンプリング用コアに圧力を付与して押し付けるピストン6と、を備え、カプラ3及び貫入用ビット5の周方向に延在する外周面には、上下方向に延びる凹溝31、51が形成されている。【選択図】図2 |
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