Analysis and Evaluation of Engineering Geological Conditions of Dong Tianshan Tunnel

Abstract

Through the investigation of the topography, stratum lithology, geological structure, and rock and soil engineering geological characteristics of the tunnel site area of ​​the Dong Tianshan Extra-long Tunnel, combined with the survey results of geophysical prospecting, drilling, hydrogeological tests, and rock mass physical and mechanical tests, the engineering project was carried out. geological analysis. The geological conditions in the tunnel site area are complex and risky, and there is a risk of collapse on the slope of the tunnel entrance. The fault fracture zone is prone to instability of surrounding rock and water inrush. Rock bursts may occur in locally deeply buried hard surrounding rock sections. During construction, advance geological forecasts should be followed, tunnel advanced support should be done, and drainage prevention should be strengthened.