TITLE:
An Application of GIS in the Consolidation Grouting of Rock Masses through Grouting Intensity Number (GIN)
AUTHORS:
Faisal Usman, Noorzada Afridi, Muhammad Safiullah, Tufail Ahmad, Shahbaz Rafiq
KEYWORDS:
GIN, Consolidation Grouting, Rock Masses, Grouting, GIS, Grouting Intensity Number, Dams & Hydropower
JOURNAL NAME:
Open Access Library Journal,
Vol.4 No.4,
April
28,
2017
ABSTRACT: The grouting of foundation rock is a critical
constructional technique for most of the mega projects across the world. Grouting
operations come up with the challenges of pre-planning, visualization,
presentation of data, quantity control, cost effectiveness and budget
management. Unless properly managed, the above factors can contribute to
project complexity and cost overruns. This paper deals with the application of
innovative Arc Geographical Information System (ArcGIS) to effectively present
the GIN (Grouting Intensity Number) data and its interpretation. The case study
is being carried out on Tarbela4th Extension Hydropower Project
during the foundation grouting of Omega Thrust Block for Penstock area. Data taken
from the grouting record are analyzed and presented through GIS. By assigning the locations (i.e., coordinates or project station
number) and boreholes plan; the details for each primary, secondary and
tertiary boreholes are displayed through GIS. The final data metrics retrieved from the grouting
station comprises of borehole grouting logs, total grout takes, grouting stages
suspended, etc. The GIN grouting report obtained from the GIS user interface
delineates information on 1) Grout consumption per primary
versus secondary holes; 2) Showing areas of high
grout takes; where secondary, tertiary and quaternary boreholes are required; 3) The grouting stages remained unsuccessful. The
final interpretation of GIS data is used to avoid unnecessary secondary, tertiary
and quaternary holes executions which lead to the completion of the project
within the given time frame and allocated resources.