Geo Technical Investigation Report
1 INTRODUCTION
1.1 GENERAL
M/S Trans Tech has intended to construct the “Gulberg
Mall and Residency” at Gulberg Green, Islamabad. The structure approximately
comprises of multi stories structure (2B+LG+G+M+5F). M/S Trans Tech has
entrusted the services of M/s BK Engineering Private Limited for Geotechnical
Investigations/Studies and evaluation thereon.
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| Soil |
In order to evaluate the subsurface conditions at the
site, M/s BK Engineering conducted the site investigations and thereafter
performed the analysis. For the purpose, two (02) Straight Rotary Machines were
mobilized at site with geotechnical team including Senior Geologist Shahid
Khawaj, Geologist Rehmat Nasir, experienced Drillers and helpers for executing
the work of sub- surface exploration/site investigation with effect from March
10-25, 2019.
The soil samples recovered during field investigations
have been tested at Geotechnical Testing Laboratory of BK Engineering Private
Limited, CB-83/1, Street No. 2, Shalley Valley, Range Road, Rawalpindi.
This report provides an account of the geotechnical
activities carried out at the site, the characteristics of subsurface
materials, the details of field and laboratory tests and necessary
recommendations for design and construction of foundations of the structure.
1.2 OBJECTIVES OF INVESTIGATIONS
The geotechnical investigations were undertaken to
meet the following objectives:
i. To
delineate for the major soil or subsoil types spread on over the site area.
ii. To
evolve parameters for the design of foundations of structure.
iii. To
spell-out the geotechnical considerations for the construction of foundations.
1.3 SCOPE OF WORK
The geotechnical investigation program was tailored to
fulfill the above-mentioned objectives. The following scope of field and
laboratory work has been implemented for this project:
a. Drilling
of Eleven (11) Boreholes.
b. Rock
Core Recovery and preservation in Core Boxes.
c. Carrying
out Standard Penetration Test (SPT), where possible.
d. Collection
and preservation of disturbed soil samples from the Boreholes.
e. Laboratory
testing of selected soil samples for the evaluation of classification,
moisture, density, and strength.
f. Development
of subsoil profiles.
g. Analyses
of field and laboratory data and determination of foundation design parameters
including rock/soil parameters, foundation depth, foundation size, allowable bearing
pressure and foundation settlement.
h. Formulation
of the geotechnical considerations for the construction of foundations.
i. Compilation
of a Geotechnical Investigation Report on the basis of the above studies and
studies.
1.4 DESCRIPTION OF SITE
1.4.1 Location of Project Site
The project site is located at Plot No. 01 & 02,
Opposite SAMAMA Gulberg Green, Gulberg Green, Islamabad. The proposed site is
located at global coordinates of Lat 33.60015o and Long 73.155125o and elevation
of 1,550 ft (473 Meter) above mean sea level. Google Satellite Imaginary for
Layout of project site is attached at Fig. A-1 (Appendix-A).
1.4.2 General Lithology of Project Site
Project site was almost leveled with adjacent paved
roads during soil investigation at site in the month of March 2019 with maximum
elevation difference of 4 ft between boreholes.
1.4.3 Historical Topography
The historical topography in forthcoming figures
revealed that, the location of proposed plot was situated on Barren land.
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