A Spatial Analysis Method for Evaluating the Steady State of Slope During Excavation

Abstract

The invention provides a spatial analysis method for evaluating the stable state of a side slope at an excavation stage. Multi-point displacement meters are systematically arranged to acquire displacement increase data and excavation process data of the side slope at the excavation stage; a cross-influence analysis matrix is constructed according to the displacement increase data at each measuring point, possible sliding areas of the side slope are judged according to dependency by matrix operation, and according to the influence degrees of the displacement-measuring points, sensitive side slope areas where blasting operation needs to be controlled are determined. The monitoring of the spatial analysis method on the rocky side slope is carried out by comprehensive analysis on data at multiple monitoring points and comprehensive judgment instead of monitoring a single monitoring point, and the unstability and damage conditions of the side slope are analyzed from overall and local aspects; according to the related dependency between the arranged displacement-monitoring points, measured value-sensitive parts and influencing areas leading to displacement sensitivity are searched, so that the specific positions or extending ranges of unstable sliding blocks of the side slope can be accurately located, consequently, the spatial positions of key blocks of the side slope can be located and predicted in advance, and the spatial analysis of monitored data is realized.

Description

technical field [0001] The invention belongs to the technical field of spatial analysis of geotechnical engineering slope monitoring, and in particular relates to a spatial analysis method for evaluating the stable state of a slope during excavation. Background technique [0002] Slopes are relatively common structures in the field of civil engineering, which are widely used in various fields related to civil engineering, such as: road traffic engineering, water conservancy and hydropower engineering, construction engineering, and mining engineering. [0003] In order to accurately predict slope stability, safety monitoring technology combined with stability prediction model is often used for evaluation. Therefore, the stability evaluation and prediction method based on monitoring data is a very important theoretical and technical method. [0004] At present, domestic and foreign scholars have proposed more than 10 prediction criteria based on displacement monitoring data to...

AI Technical Summary

Problems solved by technology

[0005] The technology based on time trend analysis has the following deficiencies: (1) The basis of the time trend prediction method is based on the assumption that the deformation trend in the later period follows the growth law measured in the previous period, and cannot be applied to all situations

(2) Due to the lack of a universal monitoring index, the judgment of slope instability is based on experience

(3) The time trend prediction can only predict the displacement of a single measuring point, and the obtained information is the local displacement information of the slope, which cannot form a unified analysis of the overall deformation of the slope and a macro judgment on the stability

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