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基于被动区土体的位移模式假设,采用邓肯-张(Duncan-Chang)提出的双曲线应力-应变关系模型,建立了考虑位移非线性影响的被动土压力计算公式,并将已有模型试验的反演分析得到的计算结果与实测结果进行比较。研究结果表明:提出的公式计算结果与实测结果比较接近,该公式能够反映位移对被动土压力的非线性影响,并且形式简单、易于理解、参数较少、物理意义明确。
Based on the assumption of the displacement mode of the soils in the passive zone, the hyperbolic stress-strain relationship model proposed by Duncan-Chang was established. The formula for calculating the passive earth pressure considering the nonlinear effect of displacement was established. The existing model tests The results of inversion analysis are compared with the measured results. The results show that the calculated results are close to the measured ones. The formula can reflect the nonlinear effect of displacement on passive earth pressure. The formula is simple and easy to understand, with less parameters and clear physical meaning.