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出于拖航稳性、施工下沉、精细调平及结构强度的原因,混凝土筒型基础筒内须设置分舱板。一般设计时不考虑分舱板对承载力的作用,实际上分舱板的存在对于筒型基础的承载模式和承载能力本身是有一定的影响。通过数值模型定量对比带分舱板和无分舱板两种混凝土筒型基础的承载特性,得到分舱板对承载模式的影响。结果显示带分舱板的基础与无分舱板的基础承载模式基本相似,当荷载较小时分舱板对承载力的作用不明显,因此基础设计时可以不考虑分舱板的作用,但随着荷载的增加,分舱板对承载力的提高作用逐渐显现,当达到极限承载时,基础竖向承载力提高6.9%,水平承载力提高18.3%,弯矩承载力提高16.5%,在极端条件下,带分舱板的混凝土筒型基础将具有更大的安全储备。
For reasons of towing stability, construction sinking, fine leveling and structural strength, subdivisions are to be provided in the concrete drum base tube. The general design does not consider the role of sub-board on the bearing capacity, in fact, the presence of sub-board for the bearing capacity of the foundation and the bearing capacity itself has a certain impact. The numerical model is used to quantitatively compare the bearing characteristics of two concrete tubular foundations with and without sub-deck, and the influence of sub-deck on the bearing mode is obtained. The results show that the foundation with sub-deck is basically similar to the basic bearing mode without sub-deck. When the load is small, the effect of sub-deck on bearing capacity is not obvious, so the sub-deck can not be considered in the basic design, With the increase of load, the effect of subdivision plate on bearing capacity gradually appears. When the ultimate bearing capacity is reached, the vertical foundation bearing capacity increases by 6.9%, the horizontal bearing capacity increases by 18.3% and the bending moment bearing capacity increases by 16.5%. Under extreme conditions Under the concrete sub-base with subdivision will have greater safety reserves.