自升式平台在海洋工程中得到大量应用。自升式平台安装就位后会承受风浪流等环境载荷，因此需要对其在水平受荷条件下的承载特性开展研究。通过模型试验的方式分析了四腿自升式平台在水平力作用下的承载特性。结果表明：不同土质条件、不同插深下自升式平台模型的水平承载力有一定差别。对于两种黏土工况，所受水平力分别达到450N、 353N后基本停止增长；对于两种砂土工况，所受水平力分别达到75N、 84N后基本停止增长；倾角随水平位移呈线性增长。在水平载荷达到某一值后，自升式平台模型的迎力侧桩腿会逐渐丧失承载能力，而背力侧桩腿所受竖向、水平、弯矩载荷将不断增大。在进行自升式平台设计时还需要考虑桩靴的上述承载特征，对桩腿和桩靴进行合理的设计和安全评估。

Jack-ups have been widely used in offshore engineering. The jack-ups will be subjected to environmental loads such as wind and wave currents after installation， so it is necessary to carry out research on their capacity characteristics under horizontal loading. The load bearing characteristics of four-legged jack-up under horizontal loading are analyzed by model tests. The results show that： applying displacement-controlled horizontal load， the horizontal force on the jack-up model basically stops growing after reaching a stable value （450N and 353N for the two clay working conditions， and 75N and 84N for the two sand working conditions， respectively）， while the inclination angle grows linearly with the horizontal displacement. After the horizontal load reaches a certain value， the leg on the windward side of the jack-up platform model will gradually lose its capacity， while the leg on the leeward side will be subjected to increasing vertical， horizontal and bending moment loads. When designing the jack-up platform, it is also necessary to consider the above-mentioned load bearing characteristics of the pile shoe, and carry out a reasonable design and safety assessment of the pile leg and pile shoe.