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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.
In the area of high intensity, the boiler foundation of a million kilowatt unit needs to bear large vertical and horizontal loads. If the bearing capacity of the foundation soil is not high, the pile foundation needs to be used. If the distance between the column networks is small, the piled raft foundation needs to be further adopted The piled raft foundation has the characteristics of good integrity, high vertical bearing capacity, small foundation settlement and uneven adjustment of settlement ability, and the analysis of piled raft foundation is a hot research topic in the field of geotechnical engineering, and the current codes have not been given yet A clear calculation method.At present, there are different calculation models for the analysis of piled raft foundation, and different analysis softwares. Through the analysis of one million kilowatts boiler foundation, I hope to provide reference for the design of similar projects.