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本文在分析按线弹性理论计算地基不排水沉降量存在问题的基础上,根据按土的归一化双曲线应力-应变曲线计算地基不排水沉降量的分层总和法,提出了相应于地基不排水沉降量最大值的基础不利宽度的概念,并对其变化规律和影响因素作了分析。通过对大量电算结果的线性回归分析,提出了各种荷载形式下基础不利宽度的线性函数表达式,供工程设计时参考。最后采用一个油罐充水预压的观测资料验证了计算方法的可靠性。
In this paper, based on the analysis of the problem of calculating the undrained settlement of foundation by linear elasticity theory, based on the normalized hyperbolic stress-strain curve of soil, the layered summation method for calculating the undrained settlement of foundation is proposed, and the corresponding foundation is not proposed. The concept of the basic unfavorable width of the maximum value of drainage settlement was analyzed, and its variation law and influencing factors were analyzed. Through the linear regression analysis of a large number of calculation results, a linear function expression of the basic unfavorable width under various loading forms is proposed for reference in engineering design. Finally, the reliability of the calculation method was verified using the observation data of a tank filled with water.