Abstract
It is meaningful for researching on monitoring and forecasting technology of slope stability to prevent landslide disasters, especially in the water system fields. Based on the mechanical principle of interaction among sliding mass, sliding bed and monitoring cable, a new type of energy absorbing cable (called Large Deformation Cable with Constant Resistance) which can have 2000mm deformation with constant pull load of 850kN is developed. The mechanical principle of relative movement between sliding mass and sliding bed is proposed, and the multi-factor monitoring is transformed into single landslide mechanical monitoring. The relationship between sliding force of slope and pretightening force of monitoring cable is set up. According to the physical model experiment of landslide, the sliding force at the potential slip surface will change continually before the landslide. When the sliding force is greater than the shear resistance at the potential slip surface, the landslide will take place, which means the variation of sliding force at the potential slip surface will be ahead of displacement on the ground of slope. Consequently, monitoring the variation of sliding force at the potential slip surface is better than that of the displacement. Based on above principle and experiment, the system of real-time remote monitoring and forecasting for landslide disasters based on the large deformation cable with constant resistance is developed, which can realize the real-time remote monitoring warning of sliding force. Several landslides have been successfully predicted.
Highlights
INTRODUCTIONE Monitoring of geological disaster is an increasingly important task for today’s geotechnical people asked to
E Monitoring of geological disaster is an increasingly important task for today’s geotechnical people asked toT prevent or forecast natural disaster that could affect human lives
The remote force monitoring system has been performed in Nanfen open pit iron mine in China, which is located at 123.83 degrees east longitude and 41.12 degrees north latitude
Summary
E Monitoring of geological disaster is an increasingly important task for today’s geotechnical people asked to. HIGH-RESOLUTION SLIDING FORCE conventional monitoring techniques give information about MONITORING SYSTEM displacements only in a few numbers of points It is expensive and time consuming for a large number of points to measure on a continuous basis. According to sliding force monitoring principle, a new type of high resolution sliding force monitoring system called “remote monitoring warning system of sliding force” (abbreviated SPRM) has been developed This system is composed of CR-LD cable, sensor system, intelligent acquisition system, Beidou satellite transmission system, and intelligent receiving terminal system (Fig. 1). L Large Deformation Cable with Constant Resistance (abbreviated CR-LD cable) which installed in landslide mass to monitor the sliding force variations along the sliding. Sliding force monitoring approach has the potential to provide automatic continuous force monitoring with high accuracy for large slopes, RETRACTED ART extensive landslide areas, open pit mines, etc. The measurement results are shown on the monitor screen in real time, and working principle of monitoring system is shown in Fig. (1d)
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