A probabilistic model for estimating tunnel construction time is learnt with data from past
tunnel projects. The model is based on the Dynamic Bayesian Network technique. The …

Ground condition and construction (excavation and support) time and costs are the key
factors in decision-making during planning and design phases of a tunnel project. An …

Abstract The Norwegian University of Science and Technology (NTNU) has since the early
1970s published prediction models for estimated production rates, time consumption, and …

An artificial water curtain system is composed of a network of underground galleries and
horizontal boreholes drilled from these galleries. Pre-grouting measures are introduced to …

Probabilistic time estimation is an essential part of proper risk management in tunneling
projects. In recent decades, several models have been developed for this purpose, one of …

Peter Lundman Nr2.ps Page 1 DOCTORAL THESIS Cost Management for Underground
Infrastructure Projects: A Case Study on Cost Increase and its Causes Peter Lundman P eter …

Overbreak in underground excavation is one of the undesirable outcomes that may emerge
from many quality-compromising events. Among these, the drilling and blasting generally …

Budget overrun and schedule delay of infrastructure projects result in the mismanagement of
huge amounts of resources. Studies show that accounting for uncertainties in time and cost …

Electro hydraulic drillers have been widely used in mining for drilling and roof-bolting. In the
drilling process, the performance of the machine is predicted by selecting an appropriate bit …

This paper analyses the construction time and advance rate of a 3 km long drill and blast
tunnel under various geological conditions using an upgraded NTNU drill and blast …