Grouting application to control water leakage in rock tunnel : a case study from Pakistan | |
| Author | Ali, Mazhar |
| Call Number | AIT Thesis no.GE-14-03 |
| Subject(s) | Water leakage--Pakistan--Case studies Grouting--Pakistan Tunneling--Pakistan |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master in Geotechnical and Earth resource Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. GE-14-03 |
| Abstract | Water inflow problems in tunnels are not new issues in tunneling . In many occasions severe water inflow as well as leakage problems have been faced that not only reduced the stability of the rock mass surrounding the tunnel but also valuable water has been lost from the tunnel causing huge economic loss to the projects. Water inflow into the cavern or tunnel is highly dependent on the hydraulic conductivity of the rock mass. In this study effect of different geological structures in heterogeneity have been studied. These geological structures are porosity, bedding, fracture, dyke, fold, fault, and karst. The rock itself is a significant barrier against groundwater movement if it has low porosity and is un - weathered. The existence of discontinuities in the rock mass however increases the permeability and it may vary widely. The grouting result achieved by cement - based grout is highly dependent on the ability of the grout to penetrate the fractures. The current grouting ma terial and equipment are high tech instruments and very suitable for the aggressive fight against leaking water to ensure dry tunnels and a stable environment. A case study of rock tunnel in a Neelum Jehlum hydropower project from Pakistan has been review ed in which water leakage took place. In this study, assessment of water ingress problem associated with tunneling and grouting as remedial measure had been carried out on the basis of selected case study. The geological conditions of the site and water leakage in the tunnel have been assessed and some relationship between specific leakage, specific grout consumption, grouting pressure has been developed . |
| Year | 2015 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GE-14-03 |
| Type | Thesis |
| School | School of Engineering and Technology |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Geotechnical Engineering (GE) |
| Chairperson(s) | Noppadol Phien-wej; |
| Examination Committee(s) | Pham, Huy Giao;Pennung Warnitchai; |
| Scholarship Donor(s) | Higher Education Commission (HEC) Pakistan; |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2014 |