渤海PL19-3油田设计地震动参数研究

Study on Seismic Design Parameters of the PL19-3 Oilfield in Bohai Sea

渤海PL19-3油田按美国有关规范进行抗震设计,其抗震设防标准和地震动参数与我国有关技术规范相比均存在一定的差别。本文根据渤海及邻区的地震构造、地震活动环境的研究结果,以及工程场地的钻探资料、土动力参数测试结果,参照美国有关技术规范的方法,确定了PL19-3油田的设计地震动参数。研究成果不但能满足该工程的抗震设计需要,也可供渤海海域其他工程参考,尤其是所得到的场地土动力学参数具有其特殊性和代表性。本工作将促进海洋工程的抗震技术规范和设防标准的研究,同时,也为未来开展海域地震区划工作积累了基础资料和工作方法。

The aseismic design of the PL19-3 oilfield in Bohai Sea is carried out according to the American codes, whose seismic design criterion and parameters differ to a definite degree form those of the Chinese codes. In this paper, based on the seismo-tectonic and seismicity environment of Bohai Sea and its adjacent regions along with drilling data and soil dynamical tests of the engineering site, the seismic design parameters of the oilfield are confirmed by the method of the American technical codes. The results have been used in the seismic design of engineering construction, and also of important value for other engineering constructions in oceanic areas. Especially, the soil dynamical parameters in the study are characteristic and representative. This study is expected to promote further researches into seismic technical codes and design criterion of ocean engineering in China, and provide basic data and analytical method for future seismic zoning of Chinese oceanic area.