(978) 635-0012

Contact Us Technical Support

Instrumentation & Monitoring
- Geotechnical & Structural
  Monitoring using real-time and high speed instrumentation and software which provide vital safety and asset management information to reduce risk to critical infrastructure.
- ➤ Tunnels, Bridges, Dams & Levees
  Geocomp's staff have extensive experience and are unique in our ability to monitor any type of structure in real-time before, during, and after construction.
- ➤ Structural Health Monitoring
  Geocomp conducts structural health monitoring to provide structural life extension for critical infrastructure.
- Environmental
  Noise, dust, vibration & water monitoring to protect the public, infrastructure and critical resources.
- Data Solutions
  iSiteCentral® data management software to manage instrument and project data.
Testing
- Laboratory Testing
  Fast, accurate testing of soil, rock, geosynthetics, and other geo-materials to reduce uncertainty and risk.
- Field Testing
  Full range of field testing capabilities delivered by an experienced and qualified staff.
- Qualifications
  Fully accredited laboratories supporting over 25,000 projects worldwide for over 30 years.
- Request a Quote
  Let us know the testing you need and we’ll respond to your inquiry within four hours.
Products
- Materials Testing Systems
  Geocomp Lab Systems provide state-of-the-art fully automated geotechnical testing equipment.
- Field Monitoring Systems
  Geocomp Field Systems provides clients the equipment (dataloggers, monitoring equipment) and capability to access critical data.
- Pavement Instrumentation
  Geocomp provides pavement instrumentation sensing solutions for verification testing and research.
- Technical Support
Consulting
- Active Risk Management
  We help identify, assess and mitigate risks associated with construction in the natural and built environments.
- Asset Management
  Geocomp provides a systematic business process and decision-making framework to help clients make cost-effective investment decisions.
- Failure Analysis and Rehabilitation
  We assess the changes in soil properties and geological conditions to identify the causes of the failure and make rehabilitation recommendations.
- Geostructural Systems and Design
  Geocomp offers detailed design solutions for earth and water retaining structures; evaluation of existing foundations and retaining walls, and recommendations on geosynthetic reinforced slopes.
- ➤ Reinforced Soil Structures
  Geocomp has worked on many projects across the United States, which involve all types of earth retaining systems.
- ➤ Dams and Waste Retention Structures
  Geocomp excels in the geotechnical aspects of the design and assessment of dams and waste retention facilities, including those for tailings, coal combustion residuals, slimes, dredged materials and solid wastes.
Data Solutions
- iSiteCentral® Platform
  Cloud-based instrument monitoring and data management platform which provides actionable information in real-time, through automated alerts, critical to timely decision-making on projects.
- iSiteCentral® Login/Sign Up
  Log in to access a demo or sign up to create an account and access to a demo.
- Support
Monitoring Rentals

Home

Contact Us Technical Support

Materials Testing Systems Field Monitoring Systems Pavement Instrumentation Monitoring Rentals

Cyclic Direct Simple Shear (Cyclic DSS) Test System

What is the Cyclic Direct Simple Shear test?

Cyclic DSS Data Sheet

Sample Geotechnical Report

Cap and Pedestal Options

ShearTrac II-DSS

The ShearTrac II cyclic direct simple shear (CDSS) system is a universal shear system capable of performing the consolidation, static and cyclic direct simple shear phases under full automatic control. The DSS test generates a fairly homogeneous state of shear stress throughout the specimen, which provides initial stress condition, stress path, and deformation configuration that models numerous field loading conditions more closely than any other strength tests such as triaxial. The system consists of a computer-controlled unit that utilizes a micro-stepper motor to apply the vertical load and an advanced servo motor to apply the horizontal cyclic load to the soil specimen.

Applicable Test Standards

ASTM D2435, D6528, D8269
AASHTO T 216

Features

Fully automated via computer or standalone capability for control and data collection
Micro-stepper & servo electronic motor systems offers high speed and precise loading
More accurate, reliable, and easier to maintain than units requiring hydraulics or air pressure
Passive or active height control
Stress or strain controlled loading
Apply irregular stress ratio and strain time history (e.g. earthquake motion)
Capable of conducting static direct simple shear tests in drained (constant load) and undrained (constant volume) condition with or without shear bias
Software configurable excitation voltage for sensors
Remote network access for real-time monitoring and control
Software generates full report of the test or raw data (.CSV export)
Option to perform incremental consolidation and/or direct/residual shear testing

Specifications

Horizontal loading capacity: 2.25 kN (500 lbf) standard
Vertical loading capacity: 11 kN (2500 lbf) standard
Horizontal displacement: cyclic peak to peak strain of up to 10%; monotonic strain of up to 25%
Vertical displacement: 25.4 mm (1.0 in)
Cyclic rate: Up to 5 Hz; Typical test range 0.033 to 2 Hz
Dimensions: 228 x 560 x 762 mm (9 x 22 x 30 in)
Weight: 63 kg (140 lbs)
Specimen size: 2.5 in (63.5 mm) diameter standard. Also available: 2.0 in (50 mm) diameter

Request More Information

Cyclic DSS Apparatus

Other Related Systems

Large Cyclic DSS

Bidirectional Cyclic DSS

Advanced Cyclic DSS