饱和软粘土地基沉降速率的计算方法

作者：蔡波

单位：中交第一航务工程勘察设计院有限公司 天津300222

关键词：饱和软粘土  沉降速率  计算方法

分类号：TU433

出版年,卷(期):页码：2007,31(4):11-12

摘要：

为了探讨饱和软粘土地基沉降速率的计算方法,根据饱和软粘土应变固结度与应力固结度的近似关系,推导出地基沉降速率的计算公式,提出了饱和软粘土地基沉降速率的计算方法,所得结果与工程实测数值相符。结果表明:软土层超固结比对计算结果有较大影响,计算时应根据地质资料及地区经验合理选择各土层超固结比。

To study the computation method for the settlement rate of saturated soft clay foundations,on the basis of the approximate relation of stress-strain consolidation degree of saturated soft clay,a formula for calculating the settlement rate of foundations is derived and the computation method for the settlement rate of saturated soft clay foundations are provided.It can be seen that the results are in line with the measured values of the practical engineering,and the over consolidation ratio(OCR)in the soft soil layer has a significant influence on the calculation results.In the calculation,a proper selection of over consolidation ratio(OCR)at various saturated soft clay layers is carried out on the basis of the local geological data and experience.

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参考文献：

[1]JTJ250-98,港口工程地基规范[S]. [2]折学森.软土地基沉降计算[M].北京:人民交通出版社,1998. [3]赵维炳.排水固结加固软基技术指南[M].北京:人民交通出版社,2005.

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