submarine mining

Downhole technology for submarine CPT and its equipment development;

基于Downhole工艺的海底静力触探及其设备研制

This article introduces the characteristic of the Cezi-Zhenhai submarine oil pipeline.

介绍了册子—镇海海底原油管道的特点,海底管道不同部分的施工方法,主要包括近岸段管线的岸拖施工、离岸段管线的铺管施工和水平口对接等。

Construction scheme of crossing the deep weathering slot about seabed tunnel;

海底隧道穿越风化深槽的施工方案

The selection technical condition of anti-corrosion layers for seabed oil and gas pipeline is raised and several protective measures of anti-corrosion layers of newly epoxy powder is introduced aimed at special requirement of anti-corrosion layers for seabed oil and gas pipeline and combined with use instance of anti-corrosion layers for seabed oil and gas pipeline both at home and abroad.

针对海底油气管道防腐层的特殊要求,结合国内外海底油气管道防腐层使用情况,提出了海底油气管道防腐层的选择技术条件;并介绍了新型环氧粉末防腐涂层的几种防护措施。

In the paper,a new sampler—hydro-percussion seabed sampler is discussed.

介绍了集抽吸泵抽吸作用形成局部负压和三重管结构设计等特性于一体的新型海底液动冲击取样器的工作原理,并建立起液动冲击取样器抽吸泵的数学模型,对抽吸泵进行了理论分析和数值计算。

Ultrasonic measurement of seafloor sediment cores;

海底柱状沉积物超声测量

Reflection and refraction of acoustic waves at a sediment interface is an important problem for seafloor scattering,bottom reverberation and the acoustic detection of objects.

声波在海底界面的反射和透射是海底散射、海底混响、海底目标探测的重要问题。

The pressure wave caused by the vibration and yawp in seawater transmits into seafloor and induces elastic wave in seabed,so called seafloor seismic wave of sailing vessel.

航行舰船是一个很大的振动和噪声源,其振动和噪声引起的压力波经由流体介质传播到海底,引起海底岩层振动,产生弹性波并向远处传播,这种航行舰船在海底引起的弹性波称为舰船海底地震波。

Electromagnetic field by infinite horizontal linear electric current on sea floor;

海底无限长水平线电流源电磁场

The real-time continuous observations from the sea floor will establish a long-term presence in the ocean and, hence, fund.

随着新世纪的到来,海洋科学界正着手建设海底观测系统的网络,以探测和理解大洋系统的物理、化学、生物和地质等过程。

The necessity of using artificial electromagnetic sources at sea floor to determine the electrical properties of sea bottom is expounded.

阐述了在以电磁场探测海底电特性的方法中应用人工电磁场源的必要性；建议用水平电偶极子作为人工电磁场源的天线；介绍了两种物理模型的分析结果；讨论了增加探测海底深度的可能途径。

Detailed risk analysis was fully made on slurry shield tunneling construction in river bottom and sea bottom in China,construction risk to constructors,engineering quality and engineering structure were reminded and evaluated.

对国内江底、海底泥水盾构隧道施工风险进行了详细全面的分析,指出施工风险可能对盾构机械和施工人员、工程质量、工程结构带来的危害,并对风险进行了评价。