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基于现场监测系统所确定的滑坡体滑动面信息,来寻求滑坡体滑动面与室内直剪试验试样剪切面之间的力学变形对应关系。定义滑动面土体总的抗剪力峰值与剪力实时发挥值之比为滑坡体的稳定系数,从而实现了基于监测数据的滑坡体稳定性实时评价。所提方法建立了现场监测数据与滑坡体内部稳定机制间的联系,克服了以往从数理统计角度进行滑坡体稳定性预测评价的不足,又避免了对众多外在不确定复杂因素的考虑。经与4种传统滑坡体稳定性评价方法对某边坡数值模型进行的计算对比分析表明:所提基于滑动面位移监测的滑坡体实时稳定系数计算方法不仅在结果上能和传统方法取得一致,而且还克服了传统方法只能做静态评价的不足,并具有实时性。
Based on the information of sliding surface of landslide determined by the on-site monitoring system, the corresponding relationship between the mechanical deformation between the sliding surface of the landslide and the shear surface of the direct shear test specimen is sought. It is defined that the ratio of the total shear force of the sliding surface soil to the real-time value of the shear force is the stability coefficient of the landslide body, so as to realize the real-time evaluation of the stability of the landslide body based on the monitoring data. The proposed method establishes the relationship between on-site monitoring data and the internal stability mechanism of landslide body, overcomes the shortcomings of predicting and evaluating the stability of landslide body from the perspective of mathematical statistics in the past, and avoids the consideration of many complicated factors of external uncertainties. Comparisons of four kinds of traditional landslide stability evaluation methods on a slope numerical model show that the calculation method of the real-time stability coefficient of landslide based on sliding surface displacement monitoring not only can be consistent with the traditional method, But also overcome the shortcomings of the traditional method can only do static evaluation, and with real-time.