WORK METHOD
STATEMENT
(WMS)
1
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.
8
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
Septic Tank
Entrance
BSEZ ROAD
BSEZ ROAD
Borehole Locations for Soil Test
Lide Bangladesh Textile Technology
Lide Bangladesh Textile Technology Co., Ltd.
Smoking Zone of 3m x 3m
Temporary Labor Shed of 5m X 10m
1 no of Toilets 1.5m X 1.5m
2 Nos Temporary Water Reservoir with capacity of 3cum water reserviour
1 .3 000
Entrance
Waste Disposal Zone of
10m x 20m
13
Annexure 3 : Work Schedule
List of Man power and Vehicles for Geotechnical Investigation
Total number of manpower: 14 nos
Total number of vehicle: 2
Names: Vehicle Number 01: DHAKA METRO NA-20-3516
1. Abul Kalam
2. Abdur Rahman
3. Osman Akhter
4. Abdul Karim
5. Jibon Roy
6. Kamran Islam
7. Kamal Hossain
8. Abdul Rahim
9. Mushfiqur Rahman
10. Sohel Rana
11. Abul Bashar
12. Jamal Khan
13. Mujibor Rahman
14. Taposh Khan
Vehicle Number 02: DHAKA METRO KA-10-3056
SOIL TEST EQUIPMENT CHECKLIST
☐ Boring drilling Machine
☐ 100 mm diameter drilling rods
☐ 100 mm diameter drill bits
☐ Drill rods and rod coupling sets
☐ Temporary borehole casing
☐ Winch and lifting arrangement
☐ Drilling tools and accessories
☐ Spanners, wrenches and general hand tools
☐ SPT drive rods
☐ SPT hammer
☐ Hammer lifting and releasing arrangement
☐ SPT anvil/drive head
☐ SPT rod coupling set
☐ Measuring tape/scale for penetration measurement
☐ Blow-count recording sheet
☐ Sample labels and identification tags
☐ Permanent markers
☐ Sample preservation materials
☐ Sample storage boxes
☐ Pocket knife
☐ Spatula/trowel
☐ Measuring scale
☐ Water bottle for field soil examination
☐ Plastic sheets/trays for soil examination
☐ Water level measuring tape
☐ Measuring tape
☐ Borehole log sheets
☐ Field notebook
☐ Depth measuring arrangement
☐ GPS/GNSS equipment for borehole location
☐ Digital camera/mobile camera for field records
☐ Site layout/location plan
☐ Borehole location marking materials
☐ Pegs/markers for borehole identification
☐ Safety helmet
☐ Safety shoes/boots
☐ Reflective safety vest
☐ Borehole investigation checklist
☐ SPT field record sheets
☐ Soil sample register
☐ Bentonite 250kg
Mobilization and Parking Plan
The soil investigation equipment will be transported to the project site by truck. Two alternative
mobilization routes, as indicated in the accompanying figure, have been identified for
transporting the equipment to the project plot.
Under normal weather and site conditions, the truck will approach the project site via the road in
front of the BSEZ office and subsequently enter the designated project plot. The equipment will
be unloaded and mobilized into the plot in a controlled manner.
During the mobilization process, appropriate measures will be taken to ensure that there is no
obstruction, damage, or disturbance to the access roads or adjacent plots. Proper coordination
with BSEZ will be maintained, and all applicable traffic management, barricading, and safety
requirements will be followed.
In the event of heavy rainfall or unfavorable ground conditions, the alternative route via BSEZ
Road 7 will be used. In such circumstances, the truck will be parked safely in front of the project
plot on the designated road area, and the soil investigation equipment will then be manually
mobilized from the truck into the project plot.
All equipment mobilization activities will be carried out with due consideration to site safety,
traffic movement, existing infrastructure, and the activities of neighboring plots, in accordance
with BSEZ requirements.
Water Supply Plan
Daily Water Requirement:
It is planned to drill two boreholes per day, with an estimated daily water consumption of
approximately 6–7 m³.
Water Transportation and Supply Plan
A 9 m³ water tanker will be used to transport water to the project site on a daily basis during the
soil investigation period. The tanker will obtain water from an approved water source outside the
BSEZ premises and transport it to the project site.
Water will be delivered to the site once daily, either in the morning or evening, depending on the
drilling requirements and site conditions. Upon arrival, the water tanker will discharge the water
into two prepared 3 m³ water storage tanks located within the project site.
The stored water will subsequently be used for the geotechnical drilling activities. The water
storage arrangement will provide sufficient water for the planned daily drilling operations while
minimizing the frequency of tanker movements within the BSEZ area.
All water transportation and discharge activities will be carried out in a controlled manner, with
appropriate precautions taken to prevent water spillage, obstruction of traffic, or disturbance to
the surrounding area. The tanker and associated activities will comply with the applicable BSEZ
safety and site-management requirements.
Waste Management Plan
All waste generated during the soil investigation activities, including plastic bags, used gloves,
packaging materials, and other general waste, shall be collected and removed from the work area
on a daily basis. The site shall be cleaned and maintained in a neat and orderly condition
throughout the entire investigation period.
For the temporary toilet facility, a bucket-based waste collection system will be adopted. Human
excreta will be collected in a designated, securely covered container and removed from the
BSEZ premises on a daily basis for proper disposal at an approved location, in accordance with
the applicable BSEZ requirements and environmental and sanitation regulations.
No waste, sewage, or human excreta shall be discharged or disposed of within the project site, on
the access road, or into the surrounding drainage system or water bodies.
Site Restoration Plan
Upon completion of the geotechnical soil investigation, all temporary facilities, equipment,
materials, and associated installations will be removed from the site. The borehole locations and
surrounding areas will be restored to a safe, clean, and orderly condition.
The following restoration measures will be implemented:
1. Removal of Equipment and Temporary Facilities
All drilling rigs, water pumps, water storage tanks, hoses, temporary toilet facilities,
tools, materials, and other temporary installations will be completely removed from the
site.
2. Borehole Restoration
Upon completion of the required soil investigation and sampling, the boreholes will be
properly sealed and backfilled in accordance with the applicable geotechnical and
environmental requirements. Suitable approved material will be used for backfilling, and
the material will be placed and compacted appropriately to prevent settlement or the
creation of open voids.
3. Bentonite Slurry and Waste Restoration
Any bentonite slurry, drilling mud, and other drilling-related waste generated during the
investigation will be collected in designated containers or temporary containment areas to
prevent uncontrolled discharge into the surrounding ground, drainage system, or water
bodies. After completion of the drilling activities, the remaining bentonite slurry and
drilling waste will be removed from the BSEZ premises and transported to an appropriate
and approved disposal location in accordance with BSEZ requirements and applicable
environmental regulations. No bentonite slurry or drilling waste will be discharged
directly onto the ground, into drains, or into nearby water bodies.
4. Ground Surface Restoration
Any disturbed ground surrounding the borehole locations, equipment areas, or access
routes will be levelled and reinstated as far as practicable to its original condition. Any
temporary surface damage caused during the investigation will be repaired.
5. Removal of General Waste and Debris
All general waste, including plastic bags, used gloves, packaging materials, and other
debris generated during the investigation, will be collected and removed from the site on
a daily basis. No waste will be left within the project area after completion of the work.
6. Restoration of Water Collection Areas
Following completion of the investigation, all water pumps, pipelines, storage tanks, and
associated temporary arrangements used for water collection and supply will be removed.
The water collection point and surrounding area will be cleaned and restored to a neat
condition.
7. Final Site Cleaning and Inspection
A final cleaning and inspection will be conducted to ensure that no equipment, waste,
bentonite slurry, temporary structures, or hazardous materials remain at the site. Any
identified damage or disturbance will be addressed before demobilization.
The site will be handed back in a clean, safe, and orderly condition, fully restored as far as
practicable, and in accordance with the requirements and instructions of BSEZ.
Site Coordinator Details
Contract Person 1:
Name: Md. Ibrahim Khalil Raju
Contract no: +8801614021496
Email: iraju4675@gmail.com
Contract Person 2:
Name: Md. Amimul Ahasan
Contract no.: +8801763615260
Email: amimulahasan.hgpt@gmail.com