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Table of Contents
INTRODUCTION .................................................................................................. 2
Background of the Investigation ................................................................................... 2
Objectives of the Geotechnical Investigation ................................................................ 2
Project Description and Site Location ........................................................................... 3
SCOPE OF GEOTECHNICAL INVESTIGATION ......................................................... 4
Borehole Investigation Programme ............................................................................... 4
2.2 Borehole Location and Layout ................................................................................. 4
Borehole Depth and Drilling Method ............................................................................. 5
Soil Sampling and Field Soil Identification .................................................................... 5
Standard Penetration Test (SPT) ................................................................................... 5
FIELD INVESTIGATION METHODOLOGY ................................................................ 7
Rotary Wash Boring ..................................................................................................... 7
Field Soil Identification ................................................................................................ 7
Standard Penetration Test ............................................................................................ 7
Soil Sample Collection ................................................................................................ 7
Borehole Logging ......................................................................................................... 8
Groundwater Observation ............................................................................................ 8
Field Quality Control.................................................................................................... 8
CONCLUSIONS AND RECOMMENDATIONS ........................................................... 9
ANNEXURE ....................................................................................................... 10
Annexure 1: Location Map of the Plot .......................................................................... 11
Annexure 2: Bore Hole Location Points ....................................................................... 12
Annexure 3: Work Schedule ....................................................................................... 13
2
INTRODUCTION
Background of the Inves6ga6on
Lide Bangladesh Tex6le Science & Technology Co., Ltd. is proposing to establish a tex6le manufacturing
factory at Plot C14 within the Bangladesh Special Economic Zone (BSEZ). The project site has an area
of approximately 50,955 m² (5.0955 ha) and is located along Road 7 of the BSEZ development.
The proposed factory development comprises several buildings and associated facili6es, including
finishing, dyeing and weaving sheds, a sub-sta6on, steamed boiler room, hazardous chemical storage
and passage/corridor facili6es. The proposed structures consist of reinforced concrete and steel
construc6on, with varying building configura6ons and storeys. The total proposed floor area indicated
in the project loca6on drawing is approximately 39,628 m².
Considering the scale and nature of the proposed industrial development, a detailed geotechnical
inves6ga6on is required to establish the subsurface soil condi6ons and engineering characteris6cs of
the site. The inves6ga6on will provide the necessary geotechnical informa6on for the detailed
structural and founda6on design of the proposed factory.
Objec6ves of the Geotechnical Inves6ga6on
The main objec6ve of the geotechnical inves6ga6on is to assess the subsurface condi6ons of the
proposed factory site and develop reliable geotechnical parameters for structural and founda6on
design.
The specific objec6ves are to:
• Determine the subsurface soil stra6fica6on and geological condi6ons across the project site.
• Determine the engineering proper6es and classifica6on of the encountered soils.
• Obtain Standard Penetra6on Test (SPT) N-values at appropriate depths.
• Collect representa6ve disturbed and undisturbed soil samples for laboratory tes6ng.
• Iden6fy and assess the groundwater condi6ons at the site.
• Evaluate the bearing capacity and se`lement characteris6cs of the subsurface soils.
• Iden6fy any weak, compressible or problema6c soil layers that may affect founda6on
performance.
• Assess the suitability of shallow or deep founda6on systems, as applicable.
• Provide appropriate geotechnical design parameters and founda6on recommenda6ons for the
proposed factory structures.
• Provide recommenda6ons for relevant earthwork, excava6on and founda6on construc6on
requirements.
3
Project Descrip6on and Site Loca6on
The proposed project is Lide Bangladesh Tex6le Science & Technology Co., Ltd., located at Plot C14,
Bangladesh Special Economic Zone (BSEZ). The project plot has a total area of 50,955 m² (5.0955 ha).
The loca6on map iden6fies the plot as C14, situated along Road 7 within the BSEZ development.
The proposed development includes mul6ple industrial and suppor6ng structures. The major
components iden6fied in the project layout are:
• Phase I Finishing Shed
• Phase II Dyeing Shed
• Phase III Weaving Shed
• Sub-Sta6on
• Steamed Boiler Room
• Hazardous Chemical Storage
• Passage/Corridor
The proposed buildings are of reinforced concrete and steel (RC + S) construc6on, with building
configura6ons varying according to their func6onal requirements. The project drawing indicates a total
floor area of approximately 39,628.20 m².
The geotechnical inves6ga6on will therefore cover the proposed development area within Plot C14
and will be undertaken to establish the subsurface condi6ons required for the safe and economical
design of the proposed factory founda6ons.
4
SCOPE OF GEOTECHNICAL INVESTIGATION
The geotechnical inves6ga6on for the proposed Lide Bangladesh Tex6le Science & Technology Co., Ltd.
factory at Plot C14, BSEZ will be carried out through field soil iden6fica6on and Standard Penetra6on
Test (SPT) to determine the subsurface soil condi6ons and assess the suitability of the soil for the
proposed factory structures.
No laboratory soil tes6ng is included in this inves6ga6on. The soil profile and preliminary engineering
assessment will be based primarily on field iden6fica6on of soil types, borehole observa6ons and SPT
N-values obtained during drilling.
Borehole Inves6ga6on Programme
A total of 30 boreholes will be conducted within the proposed factory development area. Each
borehole will be drilled to a maximum depth of 20.0 m below the exis6ng ground level.
The inves6ga6on will include:
• Drilling of 30 boreholes;
• 100 mm diameter manual boring;
• Field iden6fica6on and classifica6on of encountered soil types;
• Standard Penetra6on Tests at appropriate depth intervals;
• Recording of SPT N-values;
• Recording of subsurface soil strata.
The field inves6ga6on results will be used to develop the SPT N value soil profile of the proposed
factory site.
2.2 Borehole Loca6on and Layout
The borehole loca6ons will be selected based on the proposed factory layout shown in the project
loca6on plan. The loca6ons will provide representa6ve coverage of the proposed building areas and
major structural components.
Par6cular a`en6on will be given to the loca6ons of the proposed Phase I Finishing Shed, Phase II
Dyeing Shed, Phase III Weaving Shed, Sub-Sta6on, Steamed Boiler Room, Hazardous Chemical Storage
and Passage/Corridor .
The final borehole loca6ons will be shown on a Borehole Loca6on Plan, with each borehole iden6fied
by a unique reference number.
5
Borehole Depth and Drilling Method
All boreholes will be advanced using 100 mm diameter rotary wash boring equipment.
The proposed inves6ga6on depth will be 0–20.0 m below the exis6ng ground level. During drilling, the
encountered soil layers will be visually examined and recorded according to their field characteris6cs,
including:
• Soil type;
• Colour;
• Texture;
• Consistency;
• Changes in soil strata with depth.
The borehole will be properly maintained during drilling using casing where necessary to prevent
collapse and to facilitate reliable field inves6ga6on.
Soil Sampling and Field Soil Iden6fica6on
Soil samples will be collected during the drilling opera6on as required for field iden6fica6on and
classifica6on of the encountered soil strata .
The soil will be iden6fied based on visual and field examina6on, including its apparent grain size,
texture, colour, consistency and rela6ve density. The iden6fied soil types will be recorded in the
respec6ve borehole logs.
The field soil iden6fica6on will be correlated with the SPT results to establish the representa6ve
subsurface soil profile for the site.
Since laboratory tes6ng is not included in the present inves6ga6on, the engineering interpreta6on will
be based on the observed field soil characteris6cs and SPT results.
Standard Penetra6on Test (SPT)
The Standard Penetra+on Test (SPT) will be conducted during borehole drilling at appropriate depth
intervals and at significant changes in soil strata.
The number of blows required for the specified penetra6on of the standard split-spoon sampler will
be recorded, and the resul6ng SPT N-value will be documented in the borehole log.
The SPT N-values, together with the field-iden6fied soil types, will be used to assess:
• Rela6ve density of granular soils;
• Consistency of cohesive soils;
6
• Varia6on of bearing capacity with depth;
• Iden6fica6on of weak or loose soil layers;
• Preliminary suitability of the subsurface soil for the proposed founda6on system.
SPT results from all boreholes will be compared to iden6fy varia6ons in subsurface condi6ons across
the project site.
7
FIELD INVESTIGATION METHODOLOGY
The field inves6ga6on will be carried out through rotary wash boring, field iden6fica6on of soil strata
and Standard Penetra6on Tests at the selected borehole loca6ons. The inves6ga6on will provide the
necessary informa6on to establish the subsurface soil condi6ons of the proposed factory site.
Rotary Wash Boring
Boreholes will be advanced using a 100 mm diameter rotary wash boring system with suitable drilling
equipment. Water will be used as the drilling medium for advancing the boreholes and removing
loosened soil materials.
Temporary casing will be provided where necessary to maintain the stability of the borehole during
drilling.
During boring, the soil materials brought to the surface will be examined and the characteris6cs of
each soil layer will be recorded. Changes in soil type, colour, texture, consistency and density will be
noted systema6cally.
Field Soil Iden6fica6on
The soil encountered at each borehole will be iden6fied based on its visual and physical characteris6cs.
The assessment will consider the apparent composi6on of sand, silt, clay and gravel, together with
colour, texture, consistency and rela6ve density.
The iden6fied soil types will be recorded against their corresponding depths in the borehole logs.
Standard Penetra6on Test
Standard Penetra6on Tests will be conducted during drilling at appropriate depth intervals and at
significant changes in soil strata.
The standard split-spoon sampler will be driven into the soil following the standard penetra6on
procedure. The number of blows required for the specified penetra6on will be recorded in the field.
The resul6ng SPT N-values will be recorded against the corresponding depth and soil type in each
borehole log.
The SPT results will be used together with the field soil iden6fica6on to assess the rela6ve density of
granular soils, consistency of cohesive soils and varia6on of soil strength with depth.
Soil Sample Collec6on
Representa6ve soil samples obtained during boring and SPT opera6ons will be collected and preserved
for iden6fica6on and documenta6on of the encountered soil strata.
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Each sample will be properly labelled with the borehole number, sample number and depth of
recovery. The observa6ons from the samples will be incorporated into the respec6ve borehole logs.
Borehole Logging
A detailed borehole log will be prepared for each inves6ga6on point. The borehole logs will include
borehole iden6fica6on, drilling depth, soil descrip6ons, soil strata, SPT results, sample informa6on and
groundwater observa6ons, where applicable.
The borehole logs will provide the primary record of the field inves6ga6on and will be used for
prepara6on of the subsurface soil profile.
Groundwater Observa6on
Groundwater condi6ons will be observed during drilling. Where groundwater is encountered, its
approximate depth below the exis6ng ground level will be recorded.
The groundwater observa6ons will be incorporated into the respec6ve borehole logs and considered
in the subsequent geotechnical assessment and founda6on recommenda6ons.
Field Quality Control
All drilling and SPT ac6vi6es will be supervised by experienced technical personnel to ensure that the
inves6ga6on is carried out systema6cally and that field observa6ons and test results are accurately
recorded.
Borehole loca6ons, drilling depths, soil strata, SPT values, sample informa6on and groundwater
observa6ons will be checked and properly documented throughout the inves6ga6on.
9
CONCLUSIONS AND RECOMMENDATIONS
The geotechnical inves6ga6on for the proposed Lide Bangladesh Tex6le Science & Technology Co., Ltd.
factory at Plot C14, BSEZ has been planned to establish the subsurface soil condi6ons required for the
detailed structural and founda6on design of the proposed development. The inves6ga6on comprises
30 boreholes of up to 20 m depth using 100 mm diameter rotary wash boring, supported by field
iden6fica6on of soil strata, Standard Penetra6on Tests and groundwater observa6ons. The borehole
and SPT results will be correlated to establish the soil profile, iden6fy varia6ons or weak strata, and
assess the general bearing and se`lement characteris6cs of the site. Based on the overall field
inves6ga6on findings, appropriate founda6on levels, allowable bearing parameters and founda6on
recommenda6ons will be established for the proposed factory buildings and associated structures.
The findings will provide the necessary geotechnical basis for safe, stable and suitable founda6on
design and construc6on of the proposed Lide Bangladesh Tex6le Science & Technology Co., Ltd.
factory.
10
ANNEXURE
11
STAGE 1
STAGE 2
STAGE 1 (79.810 ha)
STAGE 2 (120.125 ha)
G
Location of-
Lide Bangladesh Textile Science & Technology Co., Ltd.
PRO
PRO
SITE
SITE
TOT
STR
BUI
BUI
NUM
WO
WO
BUI
1. B
COV
2. M
ARE
(G
BAR
3. P
SE
4. M
HEIG
BUI
1. P
SHE
2. P
SHE
3.PH
SHE
4.SU
5.ST
ROO
6.HA
7.PA
COR
SUB
TOT
TOT
ARE
REG
BUI
TOT
PROJECT SIGN-OFF & DRAWING INFORMATION
OWNER'S
NAME &
SIGNATURE:
ARCHITECT'S
SIGNATURE &
DETAILS:
Name: RAJUK REGISTRATION NO.
IAB MEMBERSHIP NO.
Address:
MOBILE: , EMAIL:
STRUCTURAL
DESIGN
ENGR. &
SIGNATURE:
Name: Ahammad Kabir
Structural Design Engineer, M/27263
IEB Registration # DMINB/CE- 0354
Cantt. Enlistment # DCB E-147
Mobile No.: +8801614 201 002
Lide Bangladesh Textile
Science & Technology
Co., Ltd.
Annexure 1: Loca6on Map of the Plot
12
Annexure 2: Bore Hole Loca6on Points
13
Annexure 3: Work Schedule