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实测表明,超长桩基础的桩身压缩量占总沉降量很大比例,因此,等代墩基法刚性体的假定不符合实际,需要一种考虑桩身压缩量的方法来计算超长桩基础沉降。通过对现有超长桩实测数据的分析,得到了嵌岩桩桩身压缩系数拟合方程,同时得出了非嵌岩桩桩身压缩系数约为0.5;推出桩侧沉降比和桩端沉降比,并编制了Matlab计算程序。最后通过工程实例计算考虑桩身压缩的超长桩基础沉降,计算结果与实测结果相吻合。
The measured results show that the pile compression of the extra-long pile foundation accounts for a large proportion of the total settlement. Therefore, the assumptions of the rigid body of equivalent pier foundation method are not in conformity with the actual requirements. A method of considering the amount of pile compression is needed to calculate the extra- Foundation settlement. Through the analysis of the existing super long piles measured data, the fitting equation of the compression coefficient of rockfill piles is obtained, and the compressibility coefficient of the piles is about 0.5; Ratio, and the preparation of the Matlab calculation program. Finally, the settlement of super-long pile foundation considering the compression of pile body is calculated through the engineering example. The calculation results are consistent with the measured results.