海底电缆抛石保护体尺度设计及稳定验算方法

Design and Stability Calculation Method for Submarine Cable Riprap Protection

随着海洋经济的蓬勃兴起,海上风电的电力输送、海上油气平台的能源供给以及岛屿间的电网互联等项目日益增多,这些项目均广泛涉及到了海底电缆的铺设及保护。而抛石保护是常见的一种保护方式,但海缆抛石体保护设计尚无统一的方法可遵循。因此,本文提出了一种基于工程地质水文、锚型及锚重因素关联性的抛石体尺度设计方法,并详细阐述了抛石体稳定性的验算方法,包括明埋式、暗埋式和混合式抛石体的验算公式和算例。通过实际工程案例的验证,证明了该方法的有效性和可靠性。该方法涉及到部分参数需要通过试验结果进行反推,在实际应用中可根据现场试验进行验证后使用。

With the booming of the ocean economy,the power transmission of offshore wind power,offshore oil and gas platform energy supply and inter-island power grid interconnection and other projects are increasing,these projects are widely involved in the laying of submarine cables and protection.While Riprap Protection is a common protection method,there is no uniform method to follow for the design of Riprap Protection for submarine cables.Therefore,this paper proposes a design method based on the correlation of engineering geology and hydrology,anchor type and anchor weight,and elaborates on the calculation method of the stability of Riprap Protection,including the calculation formulas and examples of the open-embedded,concealed-embedded and hybrid Riprap Protection.The validity and reliability of the method is proved through the verification of actual engineering cases.Some of the parameters involved in the method need to be back deduced from the test results,which can be used in practical applications after verification based on field tests.