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首页> 外文会议>Geotechnical frontiers >Design and Preliminary Tests of Mobile Seafloor Layer Sampler Prototypes as an Add-On Unit for Portable Free-Fall Penetrometers
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Design and Preliminary Tests of Mobile Seafloor Layer Sampler Prototypes as an Add-On Unit for Portable Free-Fall Penetrometers

机译：移动式海底采样器原型作为便携式自由渗透计的附加装置的设计和初步测试

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Portable free-fall penetrometers (PFFP) are used as an innovative approach to investigate the uppermost seabed stratification, including the mobile layer. The aim of this study is to design an add-on sampler for PFFPs to collect simultaneously sediment, with focus on the mobile sediment layer. Here, we present three prototype designs and preliminary tests, based on the lessons learned from other systems such as gravity and piston corers. The prototypes differ in shape, sampling tube dimensions, wall thickness ratios, and core catching mechanisms. In preliminary tests, the sample quality was assessed based on visuals, recovery ratio and volume change. Promising results were achieved using suction only to hold the material in the sampling tube, causing the least sample disturbance. Still, the results showed that core catcher increased the chance of recovery of sand. Based on the results, recommendations for further sampler improvements, and particularly, a new core catcher design are given.
机译：便携式自由落体渗透仪（PFFP）被用作研究包括移动层在内的最上层海床分层的一种创新方法。这项研究的目的是设计一种用于PFFP的附加采样器，以同时收集沉积物，重点是移动性沉积物层。在此，我们根据从其他系统（例如重力和活塞取芯器）汲取的经验教训，提出了三种原型设计和初步测试。原型的形状，采样管尺寸，壁厚比和型芯捕获机制各不相同。在初步测试中，根据外观，回收率和体积变化评估样品质量。仅使用吸力将材料固定在采样管中即可获得可观的结果，从而将样品干扰降到最低。结果仍然表明，岩心捕集器增加了砂子回收的机会。根据结果​​，提出了进一步改进采样器的建议，尤其是提出了一种新的核心捕集器设计。

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