Abstract

Accurate knowledge of the mechanical properties of deep-sea sediments and various parameters of the seafloor environment is extremely important for deep-sea geological investigations. In this paper, a set of self-developed 3000 m-level multiparameter CPTu in-situ integrated test system is developed, which successfully solves the technical problems existing in deep-sea CPTu detection technology, hydraulic fine control penetration technology, coaxial cable and optical cable composite transmission technology, etc. A multi-functional integrated probe rod is successfully developed, which contains 3000 m-level CPTu detection technology, single rod 3 D four-way stereo resistivity measurement technology, sediment geochemical environment multiparameter puncture detection technology, and rapid detection of seafloor sediment temperature gradient technology, which can simultaneously obtain in-situ physical and mechanical properties of sediments and various geochemical indicators. It can realize the synchronous operation of static penetration of deep-sea integrated probe rod, static sampling of surface sediment and undersea camera, which breaks the limitation of single parameter and ensures the authenticity and validity of data. At present, the equipment has been successfully sea-tested in the Shenhu Sea Area of the South China Sea and obtained better data feedback, which can provide guidance and technical support for deep-sea mining, gas hydrate mining, deep-sea exploration and other operations.

摘要

准确了解深海沉积物的力学性质和海底环境的各种参数对于深海地质调查极为重要。本文研制了一套自主研发的3000 米级多参数CPTu原位综合测试系统，成功解决了深海CPTu探测技术、水力精细控制穿透技术、同轴电缆和光缆等方面存在的技术难题。电缆复合传输技术等，成功研制出多功能一体化探杆，包含3000 米级CPTu探测技术，单杆3 D 四向立体电阻率测量技术、沉积物地球化学环境多参数穿刺检测技术、海底沉积物温度梯度快速检测技术，可同时获得沉积物原位物理力学性质和各项地球化学指标。可实现深海综合探杆静态穿透、表层沉积物静态采样和海底相机同步运行，打破了单一参数的限制，保证了数据的真实性和有效性。目前，该装备已在南海神狐海域成功海试，获得较好的数据反馈，可为深海开采、天然气水合物开采、深海勘探等提供指导和技术支持。操作。