Direct Residual Shear Machine (30*30)

Description

1. Introduction

The Direct Residual Shear Machine (30×30) is a precision instrument designed to evaluate the residual and peak shear strength of soils. With a shear box size of 30 cm × 30 cm, it is specifically engineered for testing larger specimens, making it ideal for geotechnical applications where scale and accuracy are critical. This machine is a cornerstone for soil strength analysis, providing engineers with the data needed to assess slope stability, bearing capacity, and soil-structure interaction.

Applications:
The Direct Residual Shear Machine (30×30) is widely used in:

• Geotechnical Engineering: Slope stability analysis, foundation design, and earthwork stability.
• Civil Engineering Projects: Retaining walls, embankments, and underground excavations.
• Research and Development: Academic and industrial soil mechanics studies.

By providing precise control over shear and normal stress, the machine ensures reliable and repeatable results in both laboratory and field conditions.

2. Key Features and Specifications

Technical Specifications

• Shear Box Dimensions: 30 cm × 30 cm (300 mm × 300 mm)
• Maximum Normal Load: 10 kN
• Shear Displacement Range: 25 mm
• Normal Displacement Range: 12 mm
• Rate of Strain: Adjustable from 0.001 mm/min to 2.0 mm/min.
• Load Measurement: High-precision load cells with a resolution of 0.1 N.
• Shear Force Measurement: Advanced force transducer for accurate load recording.
• Material: Heavy-duty stainless steel for shear box and frame construction, ensuring strength and durability.
• Power Supply: 220-240V, 50/60Hz.

Unique Features

1. Enhanced Shear Box Size: The 30×30 cm box accommodates larger soil specimens, making it ideal for projects requiring more representative sample testing.
2. Precision Data Acquisition System: Integrated digital sensors provide real-time data logging for displacement, force, and load, minimizing human error.
3. Advanced Control Mechanism: Offers automated control of strain rate for consistent and accurate testing.
4. Robust Construction: The machine is built with corrosion-resistant materials, suitable for long-term use in challenging environments.
5. Connectivity Options: Includes USB and wireless connectivity for seamless integration with data analysis software.
6. Customizable Settings: Adjustable parameters allow testing of various soil types, including granular and cohesive soils.

Key Performance Enhancements

• High Sensitivity Sensors: Ensure precise measurements for both peak and residual shear strength.
• Smooth Operation: Low-friction guideways and precision-machined components reduce mechanical noise and variability.
• Adaptability: Accommodates both drained and undrained testing, providing versatility across applications.

3. Usage and Benefits

Step-by-Step Usage

1. Specimen Preparation: Place the prepared soil specimen into the 30×30 cm shear box and ensure proper alignment.
2. Initial Setup: Apply the desired normal load using the machine’s calibrated loading mechanism.
3. Test Configuration: Select and set the strain rate according to the soil type and test requirements.
4. Start Testing: Initiate the test to apply shear force incrementally while monitoring and recording data through the digital interface.
5. Data Analysis: Export the recorded data to software or directly evaluate results on the machine’s display.
6. Post-Test Cleanup: Clean the shear box and components for maintenance and longevity.

Advantages

• Improved Accuracy: High-resolution sensors and advanced electronics ensure precision in measurements.
• Larger Sample Testing: The 30×30 cm shear box provides more representative results for large-scale projects.
• Ease of Use: User-friendly digital interface simplifies testing procedures, reducing operator fatigue.
• Versatility: Customizable strain rates and load capacities accommodate a wide range of soil conditions and engineering needs.
• Time-Saving: Automated processes and digital output reduce testing time while increasing reliability.

Problem Solving

• Challenge: Difficulty in analyzing large soil specimens.
  Solution: The larger shear box enables more realistic testing conditions for accurate engineering assessments.
• Challenge: Time-consuming manual data collection.
  Solution: The integrated data acquisition system provides automated and real-time results.

4. Applicable Standards and Certifications

The Direct Residual Shear Machine (30×30) meets and exceeds international standards for soil testing, ensuring compliance with industry regulations and best practices.

Compliance with Standards

• ASTM D3080/D3080M: Standard Test Method for Direct Shear Test of Soils Under Consolidated Drained Conditions.
• BS 1377-7: Methods of Testing Soils for Civil Engineering Purposes – Shear Strength Tests.
• ISO 17892-10: Geotechnical Investigation and Testing – Direct Shear Testing.

Certifications

• ISO 9001: Certified for quality management systems in manufacturing and design.
• CE Marking: Certified for compliance with European safety and performance standards.
• RoHS Compliant: Ensures environmentally friendly production processes.

5. Maintenance and Durability

Maintenance Requirements

• Routine Cleaning: Remove soil debris and residues from the shear box and other mechanical components after every use.
• Periodic Calibration: Schedule regular calibration of load cells and sensors for consistent accuracy.
• Lubrication: Apply appropriate lubricants to movable parts to prevent wear and tear.
• System Checks: Inspect the machine for mechanical alignment and software updates periodically.

Durability Highlights

• Corrosion Resistance: Stainless steel construction prevents rust and deterioration.
• High-Strength Components: Engineered to withstand heavy loads and repetitive testing cycles.
• Temperature and Humidity Tolerance: Designed for consistent performance in varying environmental conditions.

6. Optional Accessories or Customization

Accessories

• Additional Shear Boxes: Interchangeable shear boxes for testing different soil specimens.
• Protective Covers: Prevents dust and debris buildup during storage.
• Data Analysis Software: Advanced tools for detailed visualization and interpretation of test results.

Customization Options

• Increased Load Capacity: Models with higher maximum normal loads available on request.
• Shear Box Variants: Custom sizes for unique testing requirements.
• Advanced Connectivity: Wireless data transfer options for enhanced integration.

7. Why Choose Direct Residual Shear Machine (30×30)?

The Direct Residual Shear Machine (30×30) is the ultimate solution for engineers and researchers seeking accuracy, efficiency, and durability in soil shear strength testing. Its innovative design, superior performance, and adherence to international standards make it an invaluable asset for professionals in geotechnical engineering and soil mechanics.

Key Selling Points:

• Large-Scale Testing: Accommodates larger specimens for more representative results.
• Unmatched Precision: High-accuracy sensors and automated controls eliminate variability.
• Robust and Reliable: Built to endure intensive use in laboratory and field environments.
• Time and Cost Efficiency: Simplifies complex testing procedures, saving time and resources.
• Compliance with Global Standards: Meets ASTM, ISO, and BS requirements for trusted performance.