强地震区百万千瓦机组锅炉基础设计分析

在高烈度区,百万千瓦机组的锅炉基础需要承受较大的竖向和水平荷载,如果地基土承载力不高,需要采用桩基础,而如果柱网距离较小,需要进一步采用桩筏基础.桩筏基础具有整体性好、竖向承载力高、基础沉降小、调节不均匀沉降能力强的特点,对桩筏基础的分析,是岩土工程领域研究的一个热点,现行规范尚未给出明确的计算方法.目前对桩筏基础的分析有不同的计算模型,也有不同的分析软件,通过对百万千瓦锅炉基础的分析,希望能够对类似工程的设计提供参考.

Research on design of 1000 MW unit boiler foundation in meizoseismal area

In meizoseismal area,calculating vertical load and horizontal load of the boiler foundation are very large,if the allowable bearing capacity of foundation soil is low,the pile foundation is necessary;piled raft foundation has many advantages,such as its larger vertical bearing capacity,low settlement and differential settlement,etc..The piled raft foundation 's analysis is a hotspot in the research of geotechnical engineering.Existing codes have not yet given a clear method of calculation.At present the piled raft foundation has many different models and analysis software;and the results are different;so this is a challenge.Through the research on a 1 000 MW boiler foundation,the results can be for reference in design of similar foundations.