TUNNEL DISTORTION AND PREVENTION ANALYSIS

A major research project investigating the effect of tunneling on existing tunnels has been completed at Desh Bhagat University, Mandi Gobindgarh. This subject is always of great concern during the planning and execution of underground tunneling works in the urban environment. By integrating literature reviews, site observation, field monitoring, theoretical analysis, summarization, etc., a construction strategy was proposed and verified for\ tunneling with deformation and prevention in this paper. The tunnel was in shotcrete cracks and steel arch distortion were observed, and a big deformation with a maximum of 2.0 m was monitored during the initial stage of the construction. Through carefully examining the site observation and laboratory test results, a construction principle was established for the tunneling on the basic concept of maintaining the rock strength/stiffness and keeping the rock dry, by providing confinement pressure to the rock, reducing the rock exposure time, keeping water out of the tunnel, etc. and best suitable tunneling methodology to achieve performance. To check the effectiveness of the construction measures, field monitoring was carried out, which showed that the rock deformation was well controlled and the tunnel became stable. An allowable deformation was then determined using the. From this study, it can be concluded that providing quick strong initial support and reserving core soil at the working face. The new traffic tunnel transport line under construction in chenani -Nashri passes beneath numerous tunnels including a number of those forming part of the chenani -Nashri (UDHAMPUR) Underground network. The research project focused on the latest technology and prevention method. Another component of the research project was to examine how to prevent deformation by using latest technology. This Thesis summary the main aspect s of the research project of preventing tunnel distortion and different method