Best Soil Testing and Geotechnical Investigation Company in Dhaka, Bangladesh
(We have Proudly Conducted the Sub-soil investigation of Bangabandhu Satellite Ground Station, Gazipur)
The most necessary and important part of any structure is to Test the Foundation Soils From a Best Soil Testing Company in Dhaka, Bangladesh. Building rests on underneath soil throughout its whole life. The structural Engineers can’t design the Structure without knowing soil bearing capacities and their physical properties. It’s impossible to pick out the acceptable sort of foundation while not soil testing. Whether a shallow foundation or a deep foundation soil test is a must. Bangladesh is an earthquake-prone area. A proper soil test from a renowned company will assure your building’s safer future.
OUR TEST FACILITIES:
Our Soil Test Report for Building Construction in Bangladesh are More Accurate and Relevant.
We provide soil testing services to major Govt. Organizations in Bangladesh. Public Works Department(PWD), Local Govt. Engineering Department(LGED), Military Engineering Services(MES), and Ministry of Shipping(MOS). are remarkable of them. We also provide soil testing services for Private Organizations. Square Informatics Ltd, Mercantile Bank Limited, Barnali Collections Ltd, Professional Associates Ltd, Real Condominium Ltd, and Bricks Construction Limited are notable. We also provide soil testing services to individual clients and property owners all over Bangladesh.
- Standard Penetration Test
- Natural Moisture Content Test
- Specific Gravity Test
- Density Test
- Liquid Limit Test
- Direct Shear Test
- Grain Size Analysis
- Hydrometer Analysis
- Conceptual Plan
- Consolidation Test
- Unconfined Compression Test
- Tri-axial Shear Test
- Field Compaction Test
- California Bearing Ration(CBR) Test
- Proctor and Modified Proctor
- Swelling Pressure Test
- Water Table Measuring by Piezometer Test
OUR FIELD EQUIPMENT:
Top 10 Soil Testing Company in Dhaka, Bangladesh
- Drilling Rig up to 150 Feet Capacity (5 Set)
- Mud Pump (10 Nos )
- Slurry Pump (5 Nos)
- Marine Pontoon (1 Nos )
- Casing Pipe 100m (Various Dia)
- Drill Pipe 1000m (Various Dia)
- Soil Sampler(Disturbed) (100 Nos )
- Soil Sampler(10 Nos)
- Piston 2 Nos (Various Dia)
- Injector 2 Nos (Various Dia)
- Auto Trip Hammer for SPT Counting (5 Nos )
- Vane Shear Test Apparatus (1 Set )
OUR LAB EQUIPMENT:
Reliable Soil Test Report and Reasonable Cost Rates in Bangladesh
- Microwave Oven (2 Nos)
- Moisture Teller (6 Nos)
- Direct Shear Test Machine(2 Nos )
- Unconfined Compression Test machine(2 Nos)
- Triaxial Test Apparatus (1 Nos)
- Balance (6 Nos )
- Field Compact Test (1 Nos)
- Salinity Test Apparatus (3 Nos)
- Atterberg Limit Device (2 Nos )
- Hydrometer(5 Nos)
OUR HISTORY IN NUMBERS
Best Soil Testing Company in Dhaka, Bangladesh
Why SHELLMARK is the Best Soil Testing Company in Bangladesh?
1. 10+ Years Experienced in Soil Testing Services
SHELLMARK LIMITED is providing Soil Testing and Geotechnical Investigation Services since 2012. We are providing soil Testing Services to Government, Semi-government, Autonomous Bodies, and Private sectors. Our Long-Term experience and accurate test facilities rank us as the Best soil Testing Company in Dhaka, Bangladesh. We do not merely take the filed SPT N-Values, we test the soil samples in our Geotechnical Lab.
2. Experience Field Team
Our field team members are our full-time employees. We have a full-time foreman to conduct fieldwork. Our Soil Test foreman is 15 years experienced in the Soil Test industry. Both of our skilled and non-skilled field members are more than 5 years of experience. So, they are capable of conducting fieldwork accurately. We never engage a person in field work without soil testing experience. Sometimes, our project Engineers visit the site if required.
3. Maintain Highest Field Accuracy
We always maintain the highest field accuracy. Care must be taken during Standard Penetration Test (SPT-N) counts and collection of both disturbed and undisturbed samples. Our field Engineers always guide our foreman to maintain the technical specification strictly. We are the Best Soil Testing Company in Bangladesh to maintain the Highest Field Accuracy. We have prescribed filed data collection sheet. SPT N-Values, Ground Water Table(GWT), Date of Exploration, Reduced Level(RL), and Soil Condition are carefully recorded on field datasheet.
4. Whole Bangladesh Services Coverage
Our Team Members are always ready to move to any district of whole Bangladesh within 24 hours prior to notice. We have our own pick-up van to carry our Testing Equipment and manpower as well. We have our own accommodation arrangement at the site for our Team. So, staying at the site is fully hustle-free for us. In special cases, our team is capable of working in night shift.
5. Own Soil Testing Laboratory
We have our own soil Testing Laboratory in Dhaka, Bangladesh. Both disturbed and undisturbed samples can be tested in our Lab. Field team collects the soil sample and transfer the specimen to the Lab. Our expert Lab technician performs the test carefully. Our soil Testing Laboratory results are accepted by PWD, MES, LGED, NHA, and many other governments and private organizations. Sometimes, we send the soil samples to BUET Geotechnical Lab as per the client’s request. It helps us to cross-check our Lab test results.
6. 300+ Soil Test Completed
SHELLMARKE LIMITED has successfully completed more than 300 points of soil tests all over Bangladesh. We have proudly conducted the sub-soil investigation of Bangabandhu Satellite Ground Station at Gazipur. The work has been carried out on behalf of Square Informatics Ltd(SIL). We also conducted soil Tests at the Police Training Center at Khulna, The Ministry of Shipping Head Quarter at Agargaon. SHELLMARK is the enlisted Soil Test Company of PWD & MES.
7. Authentic Test Reports
Our soil Test Reports are more Authentic & Accurate. We strictly follow the Bangladesh National Building Code, BNBC-2020 guidelines While preparing the Final report. To calculate the Bearing Capacity of Soil, we use Tarzagi Bearing Capacity Formula. To classify the Foundation Soil, unified soil classification methods are used. We interpret all of our test results and necessary graphical presentations in our reports. The reports are prepared by experienced Geotechnical Engineers.
8. Cost Effective Test Rates
Our Soil Test Cost in Bangladesh are very Reasonable and Competitive. Basic Soil Test Cost Starts from TK. 6000/- point up to 50 depth in Dhaka city. Test up to 100 feet depth TK. 9000/- point is charged. In case of outside Dhaka city, mobilization charged are included with the above rates. The above rates are included of field works, Lab Tests and Reports.
SHELLMARK has successfully completed the Soil Test in some prestigious mega projects in Bangladesh. We always maintain the best workmanship in fieldwork. We have our own soil testing Laboratory to test soil samples accurately. Our efficient work process, accurate test reports, and field accuracy rank us as the Best soil Testing Company in Dhaka Bangladesh.
Why Soil Test for Building in Bangladesh is Important?
Geographically Bangladesh is located in a very active Earthquake vulnerable zone. The unplanned city expansion of Dhaka enhances vulnerability more and more. The Earthquake forces imposed on the foundation of buildings. So the design of the foundation must be adequate to carry all gravity and lateral loads. The design of the building foundation directly depends on the underneath soil condition of the proposed land. That’s why knowing Soil Bearing Capacity is the most important part of foundation design. Soil Testing is the only method to understand the soil properties and bearing capacity. A reputed and Best Soil Testing Company in Dhaka, Bangladesh will guide you to get the exact properties of foundation soils.
1. Ensures Building Safety:
Proper soil test data help to design a building foundation safely. The type of foundation and its depth directly depends on it. Before starting Structural Design, a proper soil investigation is required. We must know the soil properties which mainly ensure the ultimate building safety. Though your building superstructures are strong enough. But the foundation soil is weak. Which causes the total failure of the structures. Inappropriate soil test causes many dangerous incidents in Building Structures.
2. Minimize Foundation Cost:
Proper and accurate soil testing reduces the foundation cost as well as the building cost. Without soil tests, foundation designers may imply more factors of safety in foundation design. This may occur to unusual costs of buildings. On the other hand, if foundation soils are not capable of carrying building loads, it occurs total building failure. Proper Soil Test from a Best Soil Testing Company in Bangladesh may reduce your foundation cost by 20%. So, do not hesitate to hire an experienced and professional Soil Test Company for your valuable project.
3. Save Life and Property:
The total building structures stand on foundation soil. If soil bearing capacity is not adequate to carry building loads, the building may fully or partially collops. Which may cause huge life risks and property loss. It is difficult to change the foundation strength of a complete building. It is also a risky and costly task. Strengthening or retrofitting of existing building’s foundation is very costly and tiresome too. So ensure accurate soil testing before starting building design.
4. Enhance Building Life:
Generally, a building may design for a certain service life of 80 to 100 years. If your superstructures are strong enough but the foundation undergoes partial settlement or failure. It drastically impacts your superstructures to impose additional shear, moment, and torsion. Settlement of foundations can not be tackled by any means. The resulting failure of buildings before their designed lifetime. A proper understanding of the foundation soil properties and its safe bearing capacity may mitigate any unusual circumstances.
5. Prevent Building Settlement:
When a building stands on soft soil, it must settle down after a certain period of life. There are two types of settlements that occur in Structures. Firstly, Uniform Settlements Secondly, Differential Settlements. Uniform settlements are less harmful because the whole structures undergo to settle down uniformly. But the differential settlements are very vulnerable to any structures. Because a portion of a structure settles down more than the other portion. In this case, structural elements experienced additional moment, shear, and torsional forces. As a result, catastrophic failure occurred on the whole structure and cause a huge loss of property and lives. So, we should rest at any type of structure in a hard layer of soil. A proper soil test and sub-soil investigation may resolve the all above issues.
6. Provide Ground Water Level:
Nowadays, most high-rise buildings are consists of Two or More Basements parking. The construction of Multi basement building needs deep excavation of foundation soil. The critical issues in such construction are the negative pore water pressure and seepage. Which lead a basement construction to the collapse of shore protection and side soil. Also, the negative pressure of soil is a vital issue in designing shear walls and basement slabs. Accurately knowing the Ground Water Level from Soil Test Reports, a structural engineer can consider and take preventive measures against the above circumstances.
The above circumstances are very important to consider in designing a building. If you have a plan to build your dream house, please hire a Best Soil Testing Company in Dhaka, Bangladesh to conduct the proper design of the building, which save your life and property.
Process of Soil Test for Building Construction in Bangladesh.
Soil Test Companies in Bangladesh follow different methods to calculate the soil bearing capacity for buildings. The widely used process in Standard Penetration Test (SPT) Method. This soil test process is a very simple and cost-effective test rate for obtaining the bearing capacity of foundation soils. We at SHELLMARK Limited follow the SPT method in Soil Test in Bangladesh. The whole process of SPT methods is described below.
1. Site preparation:
This is the first step, while you are thinking of conducting a geotechnical investigation at your proposed site. Existing old structures are to be demolished and properly cleaned before starting work. If complete demolition is not possible, then an open space of 5 feet by 5 feet is to be created for placing the soil test rigs and tripods. Water requirement is a very essential pre-requisite during Soil exploration. So nearby source of water selection is also a vital part of the whole process. Any RCC floor found under the boring points must be completely removed before conducting boring work.
2. Fixing Bore Hole Numbers and Locations:
The properties of soil may vary from one location to an adjacent location. So it is a very crucial part to select the number of boring points depending on the land size and shape. For very small sites like 2 Katha to 3 Katha land, at least 3 points soil tests are desirable. But for the larger size of land, 1 point for every 1 Katha land provides more accurate and relevant soil data from test results. The selection of borehole locations is also an important port. The building footprint and the uniform intensity of test points are considered vital issues for the selection of wash boring locations.
3. Mobilization of Field Equipment:
The site mobilization includes the carrying of soil test equipment like a drilling Rig, Casing Pipes, Drill Pipes, Soil Sampler, Auto Trip Hammer, Slurry Pump, Water Injector, Tripod, Vanilla Rope, etc. The carrying of skilled labor and non-skilled labor is also part of site mobilization. Generally, the equipment and manpower are carried through a 3 tons Pickup Van. Sometimes it is required to stay all manpower at the site for many days. In this case, a temporary labor shed or Tabu is also considered as a part of field mobilization.
4. Field SPT Collections:
Field SPT collections are the most important part of the wash boring soil sampling method. In this process, wash boring is carried out at desired locations and SPT values are collected at each 5 feet depth up to desired SPT value. To collect the SPT value a soil sampler, named Split Spoon Sampler is attached to the drill pipe and placed at the desired level. An Auto Tripped Hammer of 63.5 kg in weight dropped repeatedly from the same fixed height of 30 inches until the sampler penetrates up to 6 inches in depth and the number of blows is recorded. This process continues another two times to penetrate in total 18-inch depth and recorded the values separately.
5. Computation of SPT N Value:
From the recorded SPT Values, the corrected SPT or SPT N-Values are computed. Blows for the first 6 inches of penetration are treated as seating value and cannot be counted in the calculation of SPT N Value. The rest of 12 inches penetration blows are considered as the total SPT N Values. For very hard or rock type soils, 50 SPT N-Vales are desirable. So, the collection of SPT blows is to be continued up to desired depth where 50 SPT N Values are obtained. In the case of a deep foundation, at least 6m depth hard soil layer is desirable under where the foundation rest on the soil.
6. Sample Collections:
In the wash boring method, generally, two types of samples are collected at different depths of a boring point. a) Disturbed Samples b) Undisturbed Samples. When the in-situ properties of soil samples get disturbed are considered disturbed soil samples. If these properties remain the same are called undisturbed samples. For the collection of disturbed soil samples, Split Spoon Samplers are used. On the other hand, undisturbed soil samples are collected using Piston Samplers. Shallbe tubes are used to collect the undisturbed samples.
7. Lab Test of Soil Samples:The collected disturbed and undisturbed soil samples are transferred to the soil test laboratory. The physical properties of soil samples are captured by an experienced Geotechnical Engineer. The mechanical properties are calculated by performing necessary lab tests of all soil samples. The commonly used laboratory tests are Natural Moisture Content, Specific Gravity, Atterberg Limits, Soil Density, Grain Size Analysis, Hydrometer Test, Direct Shear Test, Unconfined Compression Test, Consolidation Test, Triaxial Shear Test, etc. Sometimes, we send soil samples to BUET Geotechnical Lab for High-rise Buildings to get more authentic results.
8. Test Results & Report:
The Lab Test Results are further analyzed by expert Geotechnical and Foundation Engineers. Final test result data sheets and necessary graphical presentations are prepared. From the data sheets, soil bearing capacity and other properties are calculated using different Formulas. The most commonly and widely used Formula is TARZAGI BEARING CAPACITY FORMULA. The factor of safety for soil bearing capacity is considered as 3. After compiling these all data, a Soil Test Report is prepared and supplied to the client duly signed by RAJUK Enlisted Foundation Engineer.
Soil Test for Computing Bearing Capacity is the most important part of Designing suitable, economical, and safe foundations. Structural Engineers use these soil test report for further Foundation Design and other sub-structures. A Best Soil Testing Company in Dhaka, Bangladesh can make sure to Conduct the whole sophisticated process accurately.
Soil Test Cost in Bangladesh
Soil Test Costs in Bangladesh generally vary from Tk.6000/- to Tk.25000/-. It depends on a number of factors. The major factors are listed below:
1. Depth of Bore Hole
The cost of soil Tests varies on the depth of explorations. Generally, shallow depth is low cost, and deeper costs are high. It’s because in-depth more than 100 feet required more time and Manpower. On the other hand, a depth of fewer than 100 feet required comparatively Less manpower and time. A 6-person team, Generally, can collect SPT up to 70 feet to 80 feet in a day. But in case of 100 feet to 120 feet depth, 8 persons are required. We have soil test capacity up to 150 feet by manual wash boring method. For beyond 150 feet depth, we use a rotary drilling rig. We have also an auto trip hammer to ensure the exact free fall of the hammer.
2. Numbers of Bore Hole
Total number of Boreholes are a major factor of Soil Test Cost. Generally, the soil Test charges are taken on the Number of Bore Holes and depth basis. The rates became lower if the number of Bore Holes is more. It’s because the mobilization and demobilization costs remain the same for a specific site. Most importantly, for a site outside Dhaka City, we look for at least 10 points of soil Test. Inside Dhaka, we conduct a minimum of 3 Points. We fix our charges according to the number of points. For example, we charge Tk.6000/Point up to 60 feet depth of 3 Nos boreholes. But the charge may be reduced to Tk.5000/- for 10 Boreholes.
3. Location of Site
The cost of soil Tests in Bangladesh depends on the Location of the proposed site. We consider Dhaka City as the zero point. The distance of proposed site is calculated from the distance of Dhaka City. In the case of a site within Dhaka city, we do not include any extra charge for mobilization and demobilization. But for a site outside Dhaka city or in a remote area, we include an extra charge for the conveyance of equipment and manpower. We add the pickup fare as an additional cost. The labor charge is also slightly higher outside Dhaka City. Because they have to stay at night at the proposed site.
4. Method Of Soil Exploration
Soil Test cost in Bangladesh depends on the soil Test method. There are many methods are practiced in Bangladesh. Wash Boring Method, Cone Penetration Test(CPT) Method, California Bearing Ratio(CBR), etc. Each method requires different types of arrangements. Thus, costs are various. For example, in the wash boring method-if, you want SPT at each 5 feet depth all over the depth. The cost may be higher than usual.
5. Amount of Lab Test
The cost of soil Test depends on the amount of Lab Test carried out. Every soil Test company or Institute have its own charts for Lab Test. BUET Geotechnical Lab charges Tk.2300/- for specific Gravity Test. They charge Tk.3800/- for Grain Size Analysis. Charge Tk.7000/- for Hydrometer Test. There is some costly test like consolidation Test, Direct Shear Test Unconfined Compression Test, etc. BUET also charges Tk. 24000/- for the one-dimensional consolidation Test. They charge Tk. 10000/- for Unconfined compression Test. Tk. 16000/- for Direct shear Test.
6. Urgency of Test Report
The test of soil samples in the Geotechnical Lab required some time. Generally, we take 10 to 15 days to perform necessary Lab Tests on a regular basis. Most importantly, the consolidation test requires more time than another test. It comprises continuous loading and unloading at different loads. If any client wants to have Lab Test within 5 to 10 days. We perform the Test on the day and night shifts. Also, some tests are performed simultaneously with additional lab technicians. In this case, we impose some additional charge for it.
7. Offshore & Onshore Sites
Generally, an offshore site does not require any extra arrangement. But in the case of the onshore site, some extra arrangements are required. Soil Test underwater requires a boat, Villa, and extra cashing pipes. It Causes the high price of soil Tests.
8. Geographical Features
Soil Test cost depends on the Geographical features also. In the case of hilly areas, Changes are higher than the plain Land.
Soil Test Report in Bangladesh
Soil Test Report in Bangladesh Contains the following Information:
1. Project Information
2. Date of Filed SPT Collection
3. Reduced Level(RL) of Site
4. Numbers of Bore Hole
5. Depth of Bore Hole
6. Ground Water Table
7. Weather Condition
8. Client’s Name
9. Site Address
10. Height of Building(Story Height)
11. Occupancy of the Building
12. Methodology of Test
13. Scope of Works
14. Physical Properties of Soil
15. Bearing Capacity Table
16. Test Points Location Layout
17. SPT Logs
18. Laboratory Test Results
19. Necessary Graphical Presentations
20. Detail of Geotechnical Engineer
21. Recommendations for Foundation Types
22. Information of Testing Company