Monitoring and evaluating method for ground subsidence

Abstract

The invention discloses a monitoring and evaluating method for ground subsidence. The monitoring and evaluating method includes the following steps that the region with ground subsidence is comprehensively investigated, and an arrangement scheme of displacement monitoring datum points and displacement deformation monitoring points is determined according to an investigation result; with a set monitoring period, the displacement deformation monitoring points are monitored, and a monitoring time sequence for ground subsidence is established for each monitoring point; fractal index parameters for ground subsidence are determined and include an accumulated deviation, a range and a standard deviation; according to the parameters, a fractal index for ground subsidence is determined; according to ground subsidence and stability monitoring judgment rules, ground stability is evaluated, and a subsidence risk is predicted; according to the fractal index for ground subsidence, the evolution of the ground subsidence index is determined, and the ground long-term stability is evaluated. The ground subsidence stability monitoring judgment rule is established to evaluate the ground subsidence stability and subsidence risk; the ground long-term stability and the evolution trend of the stability are evaluated in real time, and the ground subsidence and long-term stability can be determined and evaluated.

Description

technical field [0001] The invention belongs to the field of ground deformation and stability evaluation, and in particular relates to a displacement monitoring parameter and a measurement and evaluation method for ground subsidence and its stability evolution trend. Background technique [0002] Ground subsidence is a common type of geological disaster, which seriously damages the geological environment of the subsidence area. Ground subsidence has the characteristics of long duration, high damage hazard, suddenness and strong concealment. The subsidence can not only seriously damage the ground buildings, but also cause large-scale farmland damage, landslides, forest vegetation destruction, and soil erosion. , desertification and other issues. Due to the characteristics of land subsidence, such as nonlinearity, effect hysteresis, and complex foundation conditions, it is often impossible to effectively predict the stability and instability time of land subsidence. Therefor...

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Problems solved by technology

The empirical methods in the above methods are based on a large amount of observation data, obtained through continuous research and improvement, and are established for a certain area, requiring a large number of measured data from observation stations, and cannot be applied casually in other areas

The theoretical model method is based on the mechanical method to solve the problem, the formula is more complicated, and the parameters used are usually obtained by laboratory or theoretical derivation, which are generally not directly related to the field measured data, so it is difficult to determine

The influence function method also has certain defects. Due to the complexity of the rock mass itself and the movement laws of the mined rock mass, it is difficult for the theoretical model adopted to fully and accurately reflect the movement laws of the rock strata and the ground surface. assumptions and simplifications that lead to projected results that often do not match reality

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