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采用双曲线法对载荷试验曲线进行拟合,建立应力与原状土的切线模量关系的切线模量方程,确定不同荷载下不同深度处的原状土切线模量,分别引入附加应力修正系数和破坏比系数,采用2种不同的沉降计算方法对饱和尾矿砂地基桩间土的沉降进行计算,并对计算结果与实测沉降结果对比分析。认为,2种方法均反映了地基非线性变形特征,考虑附加应力修正系数的沉降计算方法偏于安全,对饱和尾矿砂地基附加应力修正系数β取0.9较为合理,为相同类型饱和尾矿砂地基桩间土的沉降计算提供参考。
The hyperbolic method was used to fit the load test curve and establish the tangent modulus equation of the relationship between the stress and the tangential modulus of undisturbed soil. The tangential modulus of undisturbed soil at different depths under different loads was established. Correcting coefficients of additional stress and damage Compared with the coefficient, two kinds of settlement calculation methods were used to calculate the settlement of soil between piles in saturated tailing sand foundation, and the contrastive analysis of calculation results and measured settlement results was made. It is considered that the two methods all reflect the nonlinear deformation characteristics of the foundation. The settlement calculation method considering the additional stress correction factor is biased to safety. It is reasonable for the correction coefficient β of the additional stress of the saturated tailing sand foundation to be 0.9, which is the same type of saturated tailings foundation pile Soil settlement calculation provide reference.