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A multi-index comprehensive evaluation and early warning method for slope stability

A comprehensive evaluation and stability technology, applied in alarms, instruments, etc., can solve problems such as timely early warning of landslide occurrence time, no unified instability criterion for displacement prediction parameters, and the overall stability of the slope can easily lead to misjudgment. The effect of improving accuracy

Inactive Publication Date: 2018-09-14
QINGDAO TECHNOLOGICAL UNIVERSITY
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Problems solved by technology

If the above-mentioned macroscopic geological deformation characteristics are ignored, it is easy to misjudge the overall stability of the slope based on the displacement monitoring data of the monitoring points.
Moreover, the displacement prediction parameters based on this type of method do not have a unified instability criterion, and the critical displacement parameters vary significantly due to the different conditions such as the scale, boundary, and dynamics of the landslide, so it is impossible to predict slope stability only based on displacement monitoring data. Divide landslide stages and make timely early warning of landslide occurrence time

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  • A multi-index comprehensive evaluation and early warning method for slope stability
  • A multi-index comprehensive evaluation and early warning method for slope stability
  • A multi-index comprehensive evaluation and early warning method for slope stability

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Embodiment Construction

[0054] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0055] In order to better illustrate the present invention, a landslide is taken as an example for detailed description below. The landslide is an accumulative landslide along the Yangtze River. The terrain of the landslide is high in the north and low in the south. The elevation of the upper and lower edges is 900-70m, the length from north to south is 1900m, and the width from east to west is 220-710m. The slope is 23°. The specific implementation steps are as follows:

[0056] Step 1. Monitoring of landslide displacement, rainfall and groundwater level data

[0057] (1) Carry out preliminary survey and mapping of the landslide to be evaluated, determine the distribution range and size of the landslide, select m...

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Abstract

The invention relates to a multi-index comprehensive evaluation and early warning method for slope stability. The method comprises the steps of monitoring landslide displacement, rainfall and underground water level data and pre-processing the acquired data; determining a landslide rear edge deformation crack connection rate and a vertical displacement direction rate; dividing landslide into stability stages according to landslide stability evaluation indexes and setting qualitative and quantitative criteria; determining a sensitive rate of each evaluation index for landslide stability; determining a comprehensive evaluation value of the overall stability of landslide; determining landslide stability stage division and monitoring early-warning levels. The method comprehensively takes macroscopic geological deformation conditions, such as slope main slide area displacement monitoring point deformation and slope uplift and subsidence features, into consideration, selects multiple qualitative and quantitative indexes reflecting the overall stability of slopes, builds a quantitative evaluation model for the overall stability of slopes by using a weighting evaluation method, definitelyreflects an overall dynamic evolution process of landslide, comprehensively performs stage division and monitoring early-warning on the overall stability of slopes and increases the accuracy of prediction models.

Description

technical field [0001] The invention relates to the field of landslide monitoring, early warning and prevention, relates to a macroscopic geological deformation sign based on the overall stability of a slope, and in particular to a method for comprehensively evaluating and monitoring and early warning the overall stability of a slope. Background technique [0002] Landslide is one of the most dangerous and destructive geological disasters. The scientific monitoring and prediction of landslide stability is the basis and premise of landslide disaster monitoring and early warning and disaster prevention and mitigation projects. [0003] At present, in the field of slope stability evaluation and landslide geological disaster monitoring, early warning and prevention and control, the main prediction and evaluation methods widely used are limit equilibrium method and displacement monitoring method. The limit equilibrium method regards the landslide body as a rigid body, and evaluat...

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Application Information

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IPC IPC(8): G08B21/10G08B31/00
CPCG08B21/10G08B31/00
Inventor 贺可强郭璐郭媛媛
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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