Geotechnical And Dolomite Investigation
Experience you can count on
Crysbol consulting provide wide range of geotechnical engineering, dolomite investigation and soil/rock testing services. No matter what the task small or large, simple or complex we take on every challenge and find the most efficient and cost-effective solution. We specialise in identifying opportunities for value-added service and constantly exceed customer expectations. We work closely with project managers, structural engineers and civil engineers from feasibility study through to design and construction.
Our Geotechnical engineering and dolomite investigation services offers peace of mind by investigating the safety and suitability of groundworks prior to and during construction. Should you be seeking approval on your building plans from local municipality, NHBRC or council for geoscience, we are readily available to assist you. Or should you be seeking advice on appropriate type of foundation for your building, pavement/road design, bridges or any related civil engineering infrastructure our professional geotechnical engineers and geologist are available to assist.
With a great eye for detail, we characterise and analyse the physical properties of soil and rock to gain a clear understanding of the ground conditions and how they impact the proposed developments.
Dolomite Investigation
A common concern in construction within Gauteng and Northwest province is the possibility of building on dolomite. The dolomite investigation in accordance with SANS 1936(2012) is required in order to determine the dolomite stability conditions beneath the proposed infrastructure and further obtain approval for the proposed development.
The dolomite stability and associated risks are investigated through:
- Percussion drilling
- Trenching / Trial pit
- Geophysical surveys
Geotechnical Engineering Services
Crysbol is rapidly establishing itself as one of the leading geotechnical consulting firms in South Africa and has developed numerous capabilities through extensive experience and offers the following geotechnical services:
- Geotechnical site investigations
- Geotechnical investigations for urban and township developments
- Housing developments (NHBRC registered)
- Building and bridges foundation design
- Road and airport pavement design and rehabilitation
- Building material investigation and testing
- Penetrometer testing including DPL, DCP, DPSH and CPTu
- Geophysical Surveys including resistivity, magnetic, electromagnetic, seismic, GPR and gravity surveys
- Geotechnical drilling and in situ borehole testing including SPTs
- Geotechnical laboratory testing and auditing (SANAS Accreditation)
- Construction monitoring and supervision
- Forensic geotechnical investigation for damaged structures (road, bridges and buildings)
- Road subgrade failure investigation
- Borrow pit investigation
- Dolomite stability investigations
- Dolomite risk management plan
- Deep and shallow foundation recommendations
Laboratory Testing
Crysbol carries out laboratory analysis in partnership SANS accredited laboratory and the following services are rendered.
- Atterberg Limits
- Grain size distribution
- Maximum Density and Optimum Moisture Content (ASTM D1557)
- Moisture & Density
- Direct Shear Testing
- Consolidation Testing
- Point load index
- Uniaxial Compression test (UCS)
- pH and Electrical Conductivity (EC)
- Mod AASHTO & CBR on natural
- Expansion Index
- Corrosivity Suite (Sulfate, pH, Resistivity, Chloride)
- R-Value Testing
- Sand Equivalent
- Hydrocollapse Testing
Some of the completed geotechnical and dolomite investigation
A stability and geotechnical investigation of the dolomite was conducted by percussion drilling, profiling of test pits, DCP testing, laboratory analysis of Atterberg boundaries and grain size distribution. A report on the stability and geotechnical investigation of the dolomite was prepared at the conclusion of the project. The report was approved by the Council for Geoscience, the Municipality and the NHBRC..
Date Completed: March 2023.
The geotechnical investigation was performed by profiling the test pits, DCP test, laboratory analysis of Atterberg limits and grain size distribution. Groundwater was evaluated through a hydrocensus survey that determined geohydrologic parameters of surrounding boreholes and surface waters. A geotechnical and geohydrological report was prepared in support of the cemetery expansion.
Date Completed: November 2022.
The geotechnical investigation was carried out by profiling the trial pits, DCP test, laboratory analysis of atterberg limits and particle size distribution, reporting and determining the appropriate foundation type. The project was successfully registered with the NHBRC.
Date Completed: September 2022.
The proposed resort will include a two-story building, roads, a swimming pool, and a dam, and the water supply will come from an existing borehole. Geotechnical investigation was performed by profiling test pits, DCP testing, laboratory analysis including pH and conductivity, CBR, foundation and road indicators. Groundwater was evaluated through a hydrocensus survey, flood line delineation, and aquifer yield testing. A geotechnical and geohydrological report and was approved by the Council for Geoscience, the Municipality and the NHBRC.
Date completed: April 2022.
