(1 南京金宸建筑设计有限公司，南京 210029； 2 长江南京航道工程局，南京 210011)
［摘要］运用ANSYS软件对筏板基础进行数值模拟，通过分析可知，集水坑的存在改变了筏板基础的受力特性，且集水坑对筏板有一定的“支座”效应。随着筏板下卧土层压缩性的降低，集水坑的“支座”效应逐渐发挥，从而使得筏板的受力状态得到改善。除此之外，集水坑的加腋角度及下卧土层的性质对筏板基础的受力特性也有很大影响。从集水坑半深处进行45°加腋与从集水坑底边起进行33.7°加腋，效果类似。
［关键词］筏板基础；集水坑；“支座”效应；加腋角度
Analysis on mechanics of raft foundation which setting a catchpit
Lu Fengchi1, Zhang Weiyu1, Ye Haitao2 (1 Nanjing Kingdom Architecture Design Co., Ltd.，Nanjing 210029，China；2 Nanjing Changjiang Waterway Engineering Bureau，Nanjing 210011，China)
Abstract:By using the software ANSYS, it can be concluded that the mechanics of raft foundation has been changed while setting a catchpit on it, in the meantime, the bearing effect appeared. With reducing the compressibility of groundsill, the bearing effect will become intense, and the mechanics of raft foundation will be improved. The gradient of rib on the catchpit and soil characteristic are very important factors to raft foundation. When the gradient of rib on the catchpit is 45°or 33.7°, the effect of raft foundation is analogous.
Keywords:raft foundation; catchpit; bearing effect; gradient of rib
作者简介：陆凤池，硕士，工程师，Email:yongzhewuju@163.com。
参考文献
［1］美国ANSYS公司驻京办事处.Ansys 使用手册［M］.
［2］GB50010—2002 混凝土结构设计规范［S］. 北京: 中国建筑工业出版社，2002.