Decision Tool for Microtunneling Method Selection

Microtunneling is a type of trenchless technology for underground pipeline construction. Using the technology, surface disruptions can be minimized. Currently, open-cut trenching is often not allowed in urban areas or environmentally sensitive areas; therefore, demand for microtunneling is increasing. However, the decision to use microtunneling can be hard to make, because many decision makers are still not familiar with the technology. In fact, it can be a risky and costly process, when used improperly. In order to achieve a successful microtunneling project, it is important to select an appropriate method, considering its strengths and limitations. A decision procedure and tool that outputs appropriate underground pipeline installation methods for specific site conditions is presented here. It should be useful for decision makers who are relatively new to microtunneling, and can be used as a check by more experienced planners.