Method for measuring critical slip surface of side slope of heterogeneous soil layer

Abstract

The invention discloses a method for measuring a critical slip surface of a side slope of a heterogeneous soil layer. The method comprises the following steps of assuming the side slope of the heterogeneous soil layer as a side slope of a homogeneous soil layer, respectively taking actual physical and mechanical parameters of each layer of a rock-soil body of the side slope of the heterogeneous soil layer as physical and mechanical parameters of the whole rock-soil body, respectively determining the most dangerous slip surface of the side slope of the homogeneous soil layer under each rock-soil mechanics parameter condition, taking an region range defined by the maximum arc and the minimum arc as a monitoring region, monitoring stress and strain data of each monitoring point in the regionrange in real time by adopting an all-fiber sensor, determining strain response rate parameters and a stability criterion of each monitoring point on the basis, determining a slope plastic slip regionrange according to a change rule of a strain response rate of each monitoring point at different moments, and further determining the position of the critical slip surface of the side slope accordingto the maximum value of a strain response rate sudden change point of the monitoring point in each all-fiber comprehensive measuring tube, so that the purpose of scientifically, effectively and timely warning and treating the side slope of the heterogeneous soil layer is achieved.

Description

technical field [0001] The invention relates to the field of slope stability evaluation and analysis, in particular to a method for determining the critical slip surface of a heterogeneous soil layer slope. Background technique [0002] Landslide disasters threaten the safety of human life and cause serious impact and harm to normal social and production operations. However, due to the differences in slope geometry, soil parameters, and geological conditions, the current slope stability monitoring and early warning methods still cannot fully meet the needs of engineering construction. The most prominent problem is the quantitative evaluation of slope stability. Criteria and determination of landslide slip surface. Therefore, how to scientifically and accurately conduct advance analysis and judgment on slope stability is one of the urgent issues to be solved in the field of slope stability evaluation and landslide disaster prevention. [0003] Among the slope stability eval...

AI Technical Summary

Problems solved by technology

However, the judgment standard and basis of the displacement time-series prediction method are based on the landslide displacement (displacement rate, acceleration rate) and its relationship with time. Therefore, this parameter and its change degree cannot correspond to the landslide evolution law and stability state one by one.

In addition, this type of method mainly monitors the change of the deep displacement of the borehole, and monitors the emergence of the slope slip surface at any time according to the sudden change of the displacement. Therefore, there are certain possibilities and uncertainties in determining the slope slip surface only by relying on displacement parameters.

Images