Geotechnical Engineering Services
Laying the foundation for safe and sustainable construction
Twining’s geotechnical engineers, geologists, and technicians bring their finest professional skills and practical experience to each project. Because we regularly provide both quality assurance and quality control services for geotechnical engineering design, we have unique and valuable insight into what it takes to get a job done efficiently and cost-effectively.
Our experts develop geotechnical services and investigation programs that include field exploration and laboratory testing to evaluate the subsurface conditions at a wide variety of sites. Typical field investigation methods include:
- small and large diameter borings
- cone penetration testing
- down-hole logging
- installation of monitoring wells
- trenching for geological/seismological hazards and fault investigations
Geotechnical Engineering Services
Geotechnical Engineering Services
Laying the foundation for safe and sustainable construction
Twining’s geotechnical engineers, geologists, and technicians bring their finest professional skills and practical experience to each project. Because we regularly provide both quality assurance and quality control services for geotechnical engineering design, we have unique and valuable insight into what it takes to get a job done efficiently and cost-effectively.
Our experts develop geotechnical services and investigation programs that include field exploration and laboratory testing to evaluate the subsurface conditions at a wide variety of sites. Typical field investigation methods include:
- small and large diameter borings
- cone penetration testing
- down-hole logging
- installation of monitoring wells
- trenching for geological/seismological hazards and fault investigations
Twining’s geotechnical engineers, geologists, and technicians bring their finest professional skills and practical experience to each project. Because we regularly provide both quality assurance and quality control services for geotechnical engineering design, we have unique and valuable insight into what it takes to get a job done efficiently and cost-effectively.
Our experts develop geotechnical services and investigation programs that include field exploration and laboratory testing to evaluate the subsurface conditions at a wide variety of sites. Typical field investigation methods include:
- small and large diameter borings
- cone penetration testing
- down-hole logging
- installation of monitoring wells
- trenching for geological/seismological hazards and fault investigations
Twining’s geotechnical engineers, geologists, and technicians bring their finest professional skills and practical experience to each project. Because we regularly provide both quality assurance and quality control services for geotechnical engineering design, we have unique and valuable insight into what it takes to get a job done efficiently and cost-effectively.
Our experts develop geotechnical services and investigation programs that include field exploration and laboratory testing to evaluate the subsurface conditions at a wide variety of sites. Typical field investigation methods include:
- small and large diameter borings
- cone penetration testing
- down-hole logging
- installation of monitoring wells
- trenching for geological/seismological hazards and fault investigations
We Use The Following Techniques
Twining’s geotechnical engineers, geologists, and technicians bring their finest professional skills and practical experience to each project. Because we regularly provide both quality assurance and quality control services for geotechnical engineering design, we have unique and valuable insight into what it takes to get a job done efficiently and cost-effectively.
Our experts develop geotechnical services and investigation programs that include field exploration and laboratory testing to evaluate the subsurface conditions at a wide variety of sites. Typical field investigation methods include:
- small and large diameter borings
- cone penetration testing
- down-hole logging
- installation of monitoring wells
- trenching for geological/seismological hazards and fault investigations
Twining’s geotechnical engineers, geologists, and technicians bring their finest professional skills and practical experience to each project. Because we regularly provide both quality assurance and quality control services for geotechnical engineering design, we have unique and valuable insight into what it takes to get a job done efficiently and cost-effectively.
Our experts develop geotechnical services and investigation programs that include field exploration and laboratory testing to evaluate the subsurface conditions at a wide variety of sites. Typical field investigation methods include:
- small and large diameter borings
- cone penetration testing
- down-hole logging
- installation of monitoring wells
- trenching for geological/seismological hazards and fault investigations
Petrographic examination of concrete and cementitious materials (ASTM C856) including visual examination of specimens in as-received condition, stereomicroscopy of polished cross-sectional surfaces, thin section analysis using fluorescence microscopy, and phenolphthalein staining to characterize the composition and condition as well as causes of deterioration or distress in submitted samples,
Scanning electron microscopy with energy dispersive x-ray spectrometry (SEM/EDS) analysis (ASTM C1723) for elemental composition of concrete, cementitious materials, aggregate and secondary deposits,
Chloride analysis to measure acid-soluble chloride content (ASTM C1152) or water-soluble chloride content (ASTM C1218) within a material to evaluate for corrosion potential and external chloride exposure,
Hardened air void system analysis (ASTM C457) to evaluate for total air content and air void system parameters for freeze-thaw durability,
Volumetric proportioning testing (ASTM C457) to quantitatively assess proportioning of concrete in comparison with mix design or specifications,
Bulk resistivity testing (ASTM C1876) to characterize the capillary porosity of concrete mixture(s),
Petrographic examination of aggregates (ASTM C295) to identify potentially deleterious materials with potential for alkali-aggregate reactivity, staining, and/or pop-outs,
and more!
Geotechnical Investigation
Our comprehensive in-house laboratories are completely certified and capable of performing all routine geotechnical tests, including moisture and density, Atterberg limits, sieve analysis, direct shear, consolidation, and R-value. The data obtained from field investigation and laboratory testing is evaluated by our engineers and used to determine the time and cost-saving methods of construction. These methods may include reusing on-site material, innovative foundation designs, and implementing innovative foundation designs with consideration of constructability.
Geotechnical Observation and Testing During Construction
Geotechnical construction observation is an integral part of any project as it ensures adherence to the geotechnical design recommendations and project specifications. Once construction on a project begins, our team of highly qualified field technicians can provide geotechnical observation and testing during all relevant activities. Our team of geotechnical engineering experts understands the importance of communication during construction and work closely with our technicians, owner representatives, and contractors to provide seamless testing and engineering services. Our in-house laboratories ensure quick turnaround and allow our staff to provide closely monitored quality control at all times. We also have extensive experience meeting the special needs of stringent agencies such as the Division of the State Architect (DSA), the Department of Health Care Access and Information (HCAI), the City and County of Los Angeles, and other public agencies and municipalities.
Specific analytical and design capabilities include:
- Foundation design, including bearing capacity and settlement evaluation
- Slope stability analysis
- Permanent and temporary earth-retaining structures
- Seismic analysis, including liquefaction and seismic settlement
- Seismic ground response analysis
- Ground improvement
- Advanced analytical methods such as finite element analysis
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Why Choose Us?
Our laboratory technicians are highly experienced with testing requirements of different pavement preservation materials. Twining laboratories consistently help public works agencies and contractors to test materials such as:
Slurry Seal
Microsurfacing
REAS
Chip Seal
The typical tests that we perform for such materials are:
Wet Track Abrasion
Asphalt content
Emulsion content
Aggregate gradation
Sand Equivalent
Consistency test (field test)
Our Balcony Inspection Services
Twining offers a range of services tailored to meet the unique needs of property owners and managers. Our services include:
E3s Housing Balcony Inspections (CP1481)
We specialize in conducting thorough inspections in compliance with CP1481 requirements, ensuring the safety of residents and compliance with local regulations.
Structural Integrity Assessments
Our team assesses the structural integrity of your balconies, identifying potential issues related to materials, connections, and load-bearing capacity.
Safety Audits
We conduct safety audits to ensure that your balconies meet the highest safety standards, including railings, guardrails, and fire safety measures.
Exterior Elevated Elements (E3s) Housing Balcony Inspection (CP1481)
An Exterior Elevated Elements (E3s) Housing Balcony Inspection (CP1481) is a comprehensive inspection of the balcony structure, including the railings, decking, and supports. The inspection is performed to identify any potential hazards or defects that could compromise the safety of the balcony.
The CP1481 inspection is based on a set of standards developed by the Canadian Construction Association (CCA). The standards cover a wide range of topics, including:
- Design and construction requirements
- Materials and workmanship requirements
- Inspection and testing requirements
We are certified E3s inspector, and we have the experience and expertise to perform comprehensive Balcony Bill Inspections. Our team is well-versed in the local, state, and national building codes, including the requirements outlined in CP1481. We provide a thorough assessment of your balcony's structural integrity, materials, and overall safety, identify potential hazards, and recommend necessary repairs or improvements.
