Control of surface subsidence based on building deformation monitoring data

Igor Shardakov,Valery Yepin,Irina Glot,Aleksandr Barayakh,Roman Tsvetkov,S Kudryavtsev,A Zhussupbekov,C Yoo

doi:10.1051/matecconf/201926505026

Abstract

This paper presents an approach to the estimation of ground surface distortion based on the data from the online deformation monitoring systems mounted on the foundations of the group of buildings located in the area of ground instability. The local monitoring systems provide control of building foundation settlements using the hydrostatic level measurement technique. These data are used to calculate the inclination foundation angles which reflect the distortion of the earth's surface at local points. The hydrostatic level system allows one to perform measurements with the desired space and time sampling and to obtain a quite detailed picture of the changes in the deformation parameters over time. A set of such local monitoring units forms a distributed system that allows monitoring the state of the earth's surface over a large area. Here, we present long-term results obtained using such system located in the city area above mining. The evolution of the inclination angles of the group of overlying buildings is shown. We discuss the validity of this approach, and estimate the accuracy of the measuring method and the factors that influence it. Finally, we assess the possibility of making short-term predictions of deformation processes inside the rock massif.

Highlights

The deformation processes occurring in rock formations can create hazard to overlying engineering structures and buildings
One way to control the processes running in the earth interior and prevent their detrimental effects is monitoring of various geomechanical parameters such as subsidence of the Earth’s surface, which responds to the processes initiated inside the rock massif
The position of individual points on the earth's surface can be monitored in real time using instrumental observations and with the use of GPS receivers [5,6,7]

Summary

Introduction

The deformation processes occurring in rock formations can create hazard to overlying engineering structures and buildings. Continuous control of the ground surface subsidence can be implemented by means of distributed monitoring systems, which are based on control of the deformation states of individual structures This approach was proposed in our earlier work [9], where the data on the vertical displacements of the foundations of a set of buildings located above the mine working were used to estimate changes in the tilt angles of the ground surface over a sufficiently wide area. Information about the long-term behavior of these sensor buildings makes it possible to monitor the evolution of the earth's surface within the observed region This information is extremely important for the prediction of deformation processes in the rock massif.

The results of individual building deformation monitoring

II III

The results of monitoring tilt angles of the rock massif

Conclusions