Geotechnical Engineering

ARM is staffed by multi-disciplinary professionals with widely varied experience, enabling us to provide effective engineering services for projects ranging from the relatively simple to the most complex. Our in-house staff of geotechnical and geoenvironmental engineers, geologists, and geophysicists assess each assignment to identify the conditions and constraints that must be addressed. This approach ensures that the most appropriate personnel and technologies are used to obtain the information needed to complete each project in a timely, thorough, and effective manner.

Geotechnical EngineeringField Investigations

ARM focuses on practical and cost-effective investigation programs to obtain the information needed to evaluate relevant site conditions. Investigation programs are designed with an understanding of the kind and quantity of data needed to address the questions and issues posed by each new assignment. Our investigative services include:

  • Site Reconnaissance and Feasibility Assessments
  • Exploratory Drilling and Testing to Support Structure Foundation Design
  • Geophysical Surveys
  • Test Pitting and Infiltration Testing
  • Evaluation of Sinkholes and Karst Features
  • Geoprobe Surveys
  • Due Diligence Assessments
  • Forensic Evaluations

ARM seeks to balance the extent of field investigations and testing to address project parameters, while containing overall project costs. We appreciate the cost implications of field work in an increasingly competitive environment and work with our clients to develop investigation programs that provide the information needed at a practical cost.

In-house Geoprobe® services add to ARM’s investigative capabilities.
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Geotechnical EngineeringAnalysis and Design

Technical competence, engineering experience and judgment, and an appreciation for cost and risk issues are critical components of geotechnical and geoenvironmental engineering. ARM’s engineering staff has both the technical training and the practical experience to provide our clients with cost-effective solutions to their engineering needs. Our areas of expertise include:

  • Evaluation of Allowable Bearing Capacity for Shallow Foundation Systems
  • Deep Foundation Design, Including Drilled and Driven Piles, Micro-Piles, and Drilled Shafts
  • Risk Assessment with Respect to Shallow Foundations in Karst Conditions
  • Evaluation and Design of Ground Improvement Measures, including Compaction Grouting, Deep Soil Mixing, and Stone Columns
  • Settlement Analysis and Mitigation, Including Compaction Grouting, Underpinning, and Slab Jacking
  • Pavement Analysis, Design, and Condition Surveys
  • Slope Stability Analysis and Rehabilitation
  • Geosynthetic Analysis and Application
  • Retaining Wall Analysis and Design, Including Segmental and Grid-Reinforced Walls
  • Sinkhole Mitigation and Repair
  • Analysis and Design of Excavation Support Systems, Including Soldier Pile and Lagging Walls, Sheet Piling, and Soil Nailing
  • Evaluation and Specification of Tunneling Systems
  • Evaluation and Mitigation of Mine Subsidence
  • Seepage Analysis and Mitigation Measures
  • Evaluation of Infiltraton Testing and Stormwater Infiltration Facilities
  • Analysis and Design of Post-Tensioned Anchors
  • Evaluation and Design of Structural Underpinning Measures
  • Design of Erosion Control Measures

Geotechnical EngineeringARM has particular experience and expertise in the evaluation and mitigation of the limestone-related problems that impact many sites in south-central Pennsylvania, as well as portions of Maryland and surrounding states. ARM routinely assesses subsurface conditions at sites underlain by limestone with regard to the extent of past or ongoing soil transport and associated sinkhole activity. ARM personnel have investigated and repaired hundreds of sinkholes, ranging in size from shallow sinkholes only several feet in diameter to sinkholes more than a hundred feet in diameter and 30 feet deep. A wide variety of sinkhole repair methods and materials are currently available, and the measures recommended by ARM reflect our consideration of site-specific soil and rock conditions, the likely cause of the sinkhole, and the proximity of the sinkhole to critical structures or utilities. ARM is mindful of our clients’ costs and risks associated with geohazards.

Geotechnical EngineeringConstruction/Operation Phase Services

ARM personnel consistently prove their value in the field while providing a wide range of construction phase services. ARM provides engineers, geologists, and field technicians to observe and advise critical elements of construction. Our field personnel help ensure compliance with project specifications; provide guidance and assistance to contractors; keep owners informed of job progress; propose cost- and time-saving measures when appropriate; and anticipate potential problems and offer solutions. Construction phase services provided by ARM include:

  • Resident Engineering Inspection
  • Professional Engineering Inspection and Certification
  • Installation, Monitoring and Interpretation of Geotechnical Instrumentation
  • Regulatory Compliance Support; Data Management; and Operations Reporting
  • Earthwork Monitoring, including Compaction Control Testing
  • Subgrade Inspection and Preparation
  • Inspection of Micropile Installation and Testing
  • Inspection of Driven Pile Installation and Testing
  • Inspection of Drilled Caisson Installation
  • Oversight of Sinkhole Repair
  • Oversight and Monitoring of Ground Improvement Measures
  • Certification of Municipal and Residual Waste Facility Construction
  • Safety and Health Support

ARM personnel make every effort to work with contractors to expedite job progress while maintaining high standards of geotechnical construction. Our personnel understand the importance of partnering with the other members of the project team, and working towards the common goal of a quality project completed on schedule and within budget.Geotechnical Engineering