How does geotechnical investigation influence the decision-making process in tunnel project planning?

Geotechnical investigation plays a crucial role in the decision-making process during tunnel project planning. It involves the study of subsurface conditions, including soil and rock properties, groundwater levels, and geological formations. The data obtained from geotechnical investigations provides critical information that influences various aspects of tunnel project planning. Here's an in-depth explanation of how geotechnical investigation influences the decision-making process in tunnel project planning: 1. Tunnel Alignment and Route Selection: * Geotechnical investigations help identify the most favorable tunnel alignment and route that considers the ground conditions and minimizes geological challenges. * Data on soil and rock types, fault zones, and groundwater levels aid in selecting the most suitable and safe tunnel route. 2. Tunneling Method Selection: * Geotechnical investigations provide insight into the stability and characteristics of the ground. * Based on the soil and rock properties, project planners can decide on the most appropriate tunneling method, such as Tunnel Boring Machine (TBM), drill and blast, or cut and cover. 3. Ground Support Design: * ....