深海浅层沉积物强度贯入式原位测试装置研制

发布时间：2017-12-26 18:29

本文关键词：深海浅层沉积物强度贯入式原位测试装置研制　出处：《中国海洋大学学报(自然科学版)》2017年10期 　论文类型：期刊论文

【摘要】：自由下落式CPT测试技术(FF-CPT)是一种重要的海上沉积物强度原位测试方法。本文在FF-CPT室内试验原型样机基础上,通过进一步改进,研制了深海浅层沉积物强度贯入式原位测试装置。FF-CPT系统主要由数据采集单元、贯入探杆、配重、耐压控制舱及释放器等组成,设备总长度约6m,贯入深度约5m,极限工作水深1 500m。FF-CPT采用自容方式进行数据采集与存储,可同时测量深海表层沉积物的侧摩阻力、锥尖阻力、孔隙水压力等参数。目前已将该FF-CPT原位测试装置初步应用于渤海、南海等海域的表层沉积物强度测量,FF-CPT工作状态良好。期望本研究可为国内海上FF-CPT自主研制与进一步工程应用提供经验与借鉴。
[Abstract]:The free down CPT test (FF-CPT) is an important in-situ test method for the strength of marine sediments. In this paper, on the basis of the prototype prototype of FF-CPT indoor test, through further improvement, the strength penetration in situ test device for deep sea shallow sediments is developed. The FF-CPT system is mainly composed of data acquisition unit, penetration rod, counterweight, pressure control cabin and releaser. The total length of the device is about 6m, the penetration depth is about 5m, and the limit work depth is 1 500m. FF-CPT is used to collect and store data by self - capacitance. It can simultaneously measure the side friction resistance, cone tip resistance, pore water pressure and other parameters of the deep sea surface sediments. At present, the FF-CPT in-situ test device has been preliminarily applied to the measurement of surface sediment intensity in Bohai and South China Sea, and the working state of FF-CPT is good. It is expected that this study can provide experience and reference for the self-development and further engineering application of FF-CPT in the sea.
【作者单位】：山东省海洋环境地质工程重点实验室;海洋国家实验室海洋地质过程与环境功能实验室;
【基金】：国家自然科学基金项目(41502265,41427803) 国家自然科学基金委员会-山东省人民政府海洋科学研究中心联合资助项目(U1606401)资助~~
【分类号】：P736.21;P75
【正文快照】： 海底沉积物强度是海洋工程设计的重要参数,其测试手段主要包括实验室测试与现场原位测试[1-3]。海底沉积物取样难度较大、成本高,且通常扰动较为严重,原状性难以保证,进而降低了所测指标的工程价值。海底原位测试最大的优点是最大限度地保证了沉积物测试的原状性,消除了取样时

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