Abstract Geological disasters such as karst water inflow and mud burst in the long tunnel have become an interna? tional problem. And it′s necessary to take further research on the mechanism of karst to have accurate understanding and evaluation of the extent and rules of karst development, to provide a basic theory for the key technology to solve the problem of karst geological disaster. Based on the previous research results, the relationship between karst groundwater and karst morphology is studied, an evaluation model and evaluation standards for karst development by hydrochemical kinetics-fractal index are established from the aspect of characteristics of karst aquifer medium,and an evaluation index system of karst development degree is formed. Using the 2# groundwater river in Wulong tunnel as an example, it shows the evaluation results agree well with the engineering practice.
Abstract：
Geological disasters such as karst water inflow and mud burst in the long tunnel have become an interna? tional problem. And it′s necessary to take further research on the mechanism of karst to have accurate understanding and evaluation of the extent and rules of karst development, to provide a basic theory for the key technology to solve the problem of karst geological disaster. Based on the previous research results, the relationship between karst groundwater and karst morphology is studied, an evaluation model and evaluation standards for karst development by hydrochemical kinetics-fractal index are established from the aspect of characteristics of karst aquifer medium,and an evaluation index system of karst development degree is formed. Using the 2# groundwater river in Wulong tunnel as an example, it shows the evaluation results agree well with the engineering practice.
.Study on Karst Development in Tunnels by Hydrochemical Kinetics -Fractal Index Evaluation Technology[J] MODERN TUNNELLING TECHNOLOGY, 2017,V54(6): 24-31
2017, Vol. 54 