2017 GEOTECHNICAL INVESTIGATION REPORT NAME OF THE PROJECT: GEOTECHNICAL INVESTIGATION AT STUDIES WORK FOR ANDHRAPRADESH MEDTECH ZONE (AMTZ) VISHAKAPATNAM, ANDHRAPRADESH LOCATION: Manufacturing unit Dist: Vishakapatnam, Andhrapradesh. BOREHOLE : 15 Sample Ref. No: IDAX/QC/SOIL/38 Report Ref. No: IDAX/REP/ICRPL‐2017060007/EXP‐GI/2017‐18/415 TESTING AGENCY: IDAX CONSULTING & RESEARCH PVT.LTD. Plot No. - 5016, Duplex-E, Brundaban Enclave, VSS Nagar, Bhubaneswar-751007, Odisha (INDIA). Tel: +91-674-3199991, 2360019, Fax: +91-674-2360019 E-mail: [email protected]Web: www.idaxconsulting.com Date of Test: 30.06.2017 Date of Submission of Report: 06.07.2017
18
Embed
GEOTECHNICAL INVESTIGATION REPORT · at change of soil Strata in different Boreholes and S.P.T soil samples were collected for laboratory analysis. Disturbed representative, soil
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
2017
GEOTECHNICAL INVESTIGATION REPORT
NAME OF THE PROJECT: GEOTECHNICAL INVESTIGATION AT STUDIES WORK
FOR ANDHRAPRADESH MEDTECH ZONE (AMTZ) VISHAKAPATNAM,
ANDHRAPRADESH LOCATION: Manufacturing unit Dist: Vishakapatnam, Andhrapradesh.
Date of Test: 30.06.2017 Date of Submission of Report: 06.07.2017
IDAX CONSULTING & RESEARCH PVT.LTD.
P R E F A C E
IDAX CONSULTING & RESEARCH PVT.LTD. is pleased to submit the geotechnical
investigation report for BH-15 STUDIES WORK FOR ANDHRAPRADESH
MEDTECH ZONE (AMTZ) VISHAKHAPATNAM, ANDHRAPRADESH . The
objective of this investigation is to ascertain the characteristics of Sub-soil to present
necessary information for sub-surface. It was endeavored to study in detail the sub-
surface conditions at the project site.
The general soil profiles and the geological stratification have been determined.
The field and laboratory works have been conducted as per relevant IS Codes.
This is to certify that the samples are collected from the proposed site for the Bore
Hole – 15 STUDIES WORK FOR ANDHRAPRADESH MEDTECH ZONE (AMTZ)
VISHAKHAPATINAM ,ANDHRAPRADESH by IDAX CONSULTING & RESEARCH
PVT.LTD. VSS NAGAR, BHUBANESWAR-75100. The laboratory tests have been
performed under the supervision of qualified personal, as per the Indian standards
and this report is prepared on the basis of these tests results and experts
experience.
For IDAX CONSULTING & RESEARCH PVT.LTD.
Engineer – Civil (Soil) (Head - Civil)
Er. Pratiksha Ray Er. Deepak Kumar Mallick
B. Tech- Civil B. Tech (Hons.) – Civil (IIT Kharagpur)
Project Code: 2017060007_GI Page 1 of 17
IDAX CONSULTING & RESEARCH PVT.LTD.
CONTENTS
Sl. No. PARTICULARS PAGES
01. INTRODUCTION 03
02. SCOPE OF WORK 03 - 04
03. DETAILS OF FIELD WORK 05
04. LABORATORY TESTS 06 - 07
05. DETERMINATION OF ALLOWABLE BEARING CAPACITY 07
06. ANALYSIS OF SUB-SOIL INVESTIGATION 07 - 08
07. FOUNDATION & RECOMMENDATION 09
08. LIMITATION 09
09. CLOSURE 09
BORE LOG & LAB TEST RESULTS OF BORE HOLE
ABP CALCULATIONS
Project Code: 2017060007_GI Page 2 of 17
IDAX CONSULTING & RESEARCH PVT.LTD.
1. INTRODUCTION
Intending to provide a safe, sound and economical foundation system for the Sub - Soil
Exploration work for BH-15 at Studies Work For Andhrapradesh MediTech Zone
(AMTZ) Vishakhepatnam , Andhrapradesh and the work for conducting detailed soil
investigation work has been awarded to M/s IDAX CONSULTING & RESEARCH PRIVATE
LIMITED, VSS Nagar, Bhubaneswar-751007.
i. Objectives of Sub-soil Exploration
The objective of this Geo-technical investigation is to optimize the Foundation system for
proposed Project within the safe bearing capacity of the soil and allowable settlement, it
consists of the following
• Determination of type, size and depth of foundation- system by analyzing the soil
properties
• To suggest a conclusive recommendation for the type of foundation System to be adopted
which would be economically viable and structurally safe for the proposed structures of the
projects.
ii. Limitations of Investigation
The scope of Geo-technical exploration is confined within limitations of the framework of
agreement drawn between AMTZ LIMITED and M/s IDAX CONSULTING & RESEARCH
PRIVATE LIMITED, Bhubaneswar-751007. All the field and laboratory experiments have
been carried out as per the Technical specification of the client and the relevant Indian
Standard Code of practice. However the directions issued by the authority in this respect has
been given due emphasis during the sub soil exploration work.
2. SCOPE OF WORK
The scope of work comprises of conducting detail soil investigation, laboratory testing,
conducting and estimation of safe bearing capacity for the above proposed work on drilled
borehole as shown by the Engineer-in charge.
i. Nature of Investigation Work
The all investigation consists of the following:
Visual reconnaissance of the site.
Field Work-Drilling of bore hole up to the required depth.
Laboratory experiments, determination of soil parameters.
Project Code: 2017060007_GI Page 3 of 17
IDAX CONSULTING & RESEARCH PVT.LTD.
Analysis of field and Laboratory data
Arriving at the conclusive decision on foundation system to be adopted in the present
case using Our Engineering judgment, based on the current practice. The detailed
Geo-technical investigation work that was carried out consists of two parts.
ii. Field Investigation:
The field investigation consists of the following methods
Location of One number of bore hole with due consultation with the authority.
Boring / drilling up to 10.0m depth below N.G.L or refusal.
Conducting standard penetration test (SPT) & Collection of undisturbed sample
(UDS) at the locations prefixed by the Engineer-in-charge.
Observation of the depth of water table in the Borehole.
Study of site condition and surroundings with regards to the need of the Project.
Taking observation of surrounding structure to observe any deficiency in safety.
Transportation of all soil samples to laboratory for analysis with proper care.
iii. Laboratory Tests:
The Laboratory tests for the sample collected are given below
Determination of Grain size analysis
Determination of soil moisture content
Determination of liquid limit
Determination of plastic limit
Determination of specific gravity
Determination of Allowable Bearing Pressure of Rock.
Project Code: 2017060007_GI Page 4 of 17
IDAX CONSULTING & RESEARCH PVT.LTD.
3. DETAILS OF FIELD WORK
i. Selection of Borehole:
One Bore-hole was selected by the Engineer in charge in order to obtain comprehensive
sub-soil data for this site with a provision of borings up to 10.0m depth as required as per
IS:1892 - 1979. For detailed laboratory investigation SPT is conducted @ 1.50 m intervals or
at change of soil Strata in different Boreholes and S.P.T soil samples were collected for
laboratory analysis. Disturbed representative, soil samples from all the Boreholes were
collected at 1.5 m. interval for different tests.
ii. Boring:
It is the main part of sub soil investigation work as the soil samples were collected for
different tests at different levels. The sub-soil exploration work at the proposed site was
carried out manually / mechanically using 150 mm diameter shell and auger manual
equipment in soft strata and power operated Mechanical boring in hard strata using diamond
cutter , as per IS : 1892 – 1979 .
iii. Standard Penetration Tests:
Standard penetration test plays a major role in sub soil investigation termination of safe
bearing capacity of soil in non cohesive type soil, particularly in non-cohesive granular sandy
soil and where the UDS could not be collected either due to high liquidity or non cohesive
nature of soil .The SPT tests were conducted as per IS: 2131-1981 respectively, in different
levels of the bore holes in a continuous manner using spilt-spoon samplers at locations
decided by Engineer-in-charge. The SPT sampler was lower inside the borehole after drilling
the required level and is driven by a 63.50 kg Rammer with a free fall of 750 mm. driving 450 mm in One stages 150 mm each and the number of blows for each 150mm penetration for
2nd & 3rd 150 mm drive recorded as “N”. Refusal was considered for N>100. The details of
location of test and SPT value [N] are presented in bore log data annexed separately.
iv. Ground Water Table:
During exploration work of the Location, 24hours observation it is found that the water table
is at 1.95m depth in BH-15 within the Boring depth from the existing ground level depending
on the location of boring. The water table may be fluctuating due to change of season.
Project Code: 2017060007_GI Page 5 of 17
IDAX CONSULTING & RESEARCH PVT.LTD.
4. LABORATORY TESTS
The laboratory-tests were conducted on selected representative disturbed / undisturbed soil
samples collected from different Borehole drilled at the proposed site. The tests include
Grain size analysis, Natural moisture content, D.F.S, Specific Gravity and Liquid limit, Plastic
limit, Plasticity index, Shear test, and Particles size distribution tests on representative soil
sample were also carried out. All the tests conducted confirming to the requirements of I.S
specification. The results of all these tests have been annexed separately.
i. Grain Size Analysis:
The grain size analysis of different soil samples were done as per the requirement of IS:
2720 (Pt-IV) 1985 – method of test for soil, Grain size analysis. The details of the test results
are shown test result sheet separately. The results of grain size analysis are used to classify
the soil in various depths of boreholes. The results of all these tests have been annexed
separately.
ii. Natural Moisture Content:
The natural moisture content was determined from different undisturbed samples of different
Boreholes at different depths, as per IS: 2720(Pt-II)-1973: Method of test for soil,
determination of Water content. It is used for determining specific gravity, optimum moisture
content, S.B.C, settlement of foundation system. The results of all these tests have been
annexed separately.
iii. Determination of Specific Gravity:
The specific gravity of the UDS / DS samples have been determined at different levels as
per IS: 2720 (Pt-III) - 1980. It is used for determining void ratio, porosity, saturated density,
S.B.C, settlement of foundation system. The results of all these tests have been annexed
separately.
iv. Determination of Void Ratio:
The void-ratio of the UDS / DS samples has been determined at different levels and the
results are shown separately. It is used for determining specific gravity, optimum moisture
content, S.B.C, settlement of foundation system. The results of all these tests have been
annexed separately.
Project Code: 2017060007_GI Page 6 of 17
IDAX CONSULTING & RESEARCH PVT.LTD.
v. Determination of Liquid Limit / Plastic Limit:
The liquid and plastic limits of soils were other index properties of soil have also been
determined as per the relevant as per IS: 2720(Pt-v)-1985 Code of practice. The liquid and
plastic limits of soil samples have been determined in the laboratory and it is used for
determining S.B.C, settlement of foundation system etc. The results of all these tests have
been annexed separately.
5. DETERMINATION OF SAFE BEARING CAPACITY (SBC)
Borehole Depth in mtrs.
Net Safe Bearing Gross Safe Bearing
Capacity in T/m2. Capacity in T/m2.
BH – 15
1.0 17.60 18.68
2.0 42.36 44.36
6. DETERMINATION OF ALLOWABLE BEARING PRESSURE OF
(ABP)
The allowable bearing pressure has been calculated as per IS: 2131 & IS: 8009 (Part-I) at
different depth from the existing ground level. The details of the calculation are annexed