刚性桩复合地基沉降计算方法探讨  

Discussion on a Settlement Calculation Method of Rigid Pile Composite Foundation

作　　者：余晓露[1] 侯勇[1] 孙大洋[1] 

机构地区：[1]中交第四航务工程勘察设计院有限公司,广东广州523100

出　　处：《港工技术》2013年第5期46-48,共3页Port Engineering Technology

摘　　要：根据应力协调原则,提出了刚性桩复合地基沉降计算新方法—应力协调法。此方法假定刚性桩达到极限承载能力状态,从而可方便地得到桩土应力比,同时规避了复合地基压缩模量的求解。此外,通过工程实例与其他两种典型的刚性桩复合地基沉降计算方法(极限应力法和规范CFG法)进行了对比分析,得出利用此方法计算的沉降量与实测值最为接近,而且反推的应力比与规范取值符合较好。但是由于复合地基沉降本身的复杂性以及理论和工程实践的有限,应力协调法还有待于进一步改善。According to the principle of stress compatibility,a new settlement calculation method of rigid pile composite foundation is put forward,which is called stress compatibility method. On the premise of the rigid pile reaching its ultimate bearing capacity,pile-soil stress ratio can be identified easily. Meanwhile,no compressive modulus of composite foundation is required. Based on the engineering practice,the new method is compared with two typical settlement calculation methods,i.e. the utmost stress method and CFG pile method. The analysis results show that the settlement value by the stress compatibility method is close to the field measured number,and the inversed stress ratio basically accords with the number adopted in the relative technical code. However,limited by the complexity of composite foundation settlement and the insufficiency of theory and engineering practice,this method needs to be improved in the future.

关 键 词：刚性桩 复合地基 沉降计算方法 

分 类 号：TU472[建筑科学—结构工程]