In order to obtain the deformation and stability characteristics of the uncovered flat geotubes structure under wave action, the wave force exerted on the flat geotubes was analyzed. By introducing a deformation indicator, the geotubes dam stability formula considering the tube deformation was derived in the case of sliding instability and overturning instability. Based on the instability forms and the corresponding deformation parameters obtained from the model test, the effect of deformation on wave force and gravity force in the case of sliding instability and the corresponding torque in the case of overturning instability was discussed respectively. The stability formula considering the geotubes deformation can be further improved if the deformation indicator is calculated. This formula fully considers the geotubes deformation characteristics caused by wave force and it has universal applicability.%为获得扁平管袋裸坝结构在波浪作用下的变形稳定特性,分析了扁平管袋在波浪作用下的受力情况,通过引入管袋变形因子,分别推导出考虑管袋变形情况的裸坝结构滑动失稳和倾覆失稳稳定性公式.结合管袋裸坝结构模型试验得到的管袋失稳方式和相应的变形参数,探讨了变形对管袋裸坝结构发生滑动失稳时所受波浪力和自重力及倾覆失稳时相应力矩的影响,计算出相应的变形因子,进一步完善了考虑管袋变形情况下管袋裸坝结构稳定性公式.该公式充分考虑波浪引起的管袋变形特征,具有普遍适用性.
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