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具有创新性的浅层负压锚桩已在１９９６年初成功地应用于由刚果ＥＬＦ公司在几内亚湾中开发的一个油气田处一艘“作业和人员食宿船”的长期系泊。Ｎｋｏｓｓａ场地的水深约１７０ｍ，是迄今西非近海最深的油气田。该场地土由正常固结的软粘土组成，是深水区场地的典型土壤。本文给出了锚定系统的设计，介绍了用减压法安装负压锚桩的方法。对这些负压锚桩在安装时所测到的性能进行了评估，包括在着底时的方位和倾斜度以及在作负压贯入时的速率。安装过程非常顺利，实测的贯入阻力与预计值吻合得极好，证实了设计的安装方法的可靠性。
The innovative shallow sub-sea anchor has been successfully applied in the early 1996 to the long-term mooring of a “job and crew accommodation vessel” at an oil and gas field developed by Congolese ELF in the Gulf of Guinea. The water depth of the Nkossa site is about 170 m, which is by far the deepest oil and gas field offshore West Africa. The site consists of normally consolidated soft clay and is typical of deep-water sites. In this paper, the design of the anchoring system is given, and the method of installing the negative pressure anchor pile by the decompression method is introduced. The performance of these negative pressure anchor piles during installation was evaluated, including the orientation and inclination at the bottom and the rate at which negative pressure was applied. The installation was very smooth and the measured penetration resistance was in good agreement with the expected value, confirming the reliability of the design installation method.