复杂软基条件下沉箱出运坡道加固设计研究

Study on reinforcement design of heavy caisson transportation ramp under complex soft foundation conditions

根据港口F地区的软弱地基情况,结合项目坡道设计需求,探讨了几种沉箱外运坡道的设计形式,并针对软弱地基进行坡道的加固设计,然后使用MIDAS–CIVIL对几种不同的加固方式分别建立模型,根据模型计算结果对比分析实际计算结果,完成坡道加固分析。结果表明:软弱地基上坡道的承载力与坡道加固设计的厚度不完全呈线性关系,坡道加固不仅要提升厚度,还要考虑变形的连续和施工组织,选择合适的加固方案;考虑潮汐变化按区域设置碎石层、水稳层和混凝土层的加固方式,提高了坡道的承载力,保证坡道的稳定。

This study mainly discusses the design forms of several caisson outbound ramps according to the soft foundation conditions in Port F area and the ramp design requirements of the project,and carries out the ramp reinforcement design for the soft foundation,and then uses Midas–civil to build models for several different reinforcement methods,and compares and analyzes the actual calculation results according to the model calculation results,and completes the ramp reinforcement analysis.The results show as following.The bearing capacity of the ramp on the soft foundation is not completely linear with the thickness of the ramp reinforcement design,which means that the reinforcement of the ramp is not only to increase the thickness,but also to consider the continuity of deformation and construction organization,and select the appropriate reinforcement scheme.Considering the change of tide,the reinforcement methods of gravel layer,water stabilized layer and this layer are set according to the region,which improves the bearing capacity of the ramp and ensures the stability of the ramp.