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SPT Trip Hammer - 2 PAWL

SPT Trip Hammer - 2 PAWL

$1,327.00 USD
$1,327.00 USD
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The SPT (Standard Penetration Test) Trip Hammer with 2 Pawls is a specialized drilling tool commonly used in geotechnical and environmental drilling for conducting Standard Penetration Tests. 

Key Features:

  1. Standard Penetration Testing (SPT): The trip hammer is designed specifically for use in SPT procedures, a widely used method for assessing the subsurface conditions of soil layers. It facilitates the driving of a split-spoon sampler into the ground to obtain soil samples at various depths.

  2. Dual Pawl Mechanism: The presence of two pawls enhances the reliability and stability of the hammering action during the SPT process. The dual pawl design ensures secure engagement with the internal rod assembly, contributing to consistent and accurate test results.

  3. Durable Construction: The trip hammer is constructed from robust materials to withstand the rigors of drilling operations. Its durable build ensures longevity and reliable performance in diverse geological conditions.

  4. Compatibility: The trip hammer is designed to be compatible with drilling rigs and equipment used in SPT applications. It typically features standard connections for seamless integration into the drilling system.

  5. Precise Hammering Action: The hammer provides a controlled and precise hammering action necessary for driving the split-spoon sampler into the soil. This precision is crucial for obtaining undisturbed soil samples and accurate subsurface information.

  6. Ease of Operation: The design of the trip hammer prioritizes ease of operation, allowing drilling operators to efficiently conduct SPT tests. It is user-friendly and facilitates smooth integration into the drilling workflow.

  7. Safety Considerations: The trip hammer is engineered with safety features to ensure the well-being of operators during drilling operations. Safety mechanisms and design elements contribute to accident prevention and overall operator security.

  8. Versatility: While specifically designed for SPT applications, the trip hammer's versatility allows it to be adaptable to different drilling environments and conditions.

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How It Works

The SPT Trip Hammer is part of the drill string and is positioned above the split-spoon sampler. The split-spoon sampler is a thin-walled tube that collects soil samples as it is driven into the ground. The drilling rig lifts the entire drill string, including the trip hammer and attached split-spoon sampler, to a predetermined height and then releases it. The weight of the hammer, along with the energy from the fall, produces a hammering action on the split-spoon sampler.

The hammering action drives the split-spoon sampler into the soil. The number of blows required to advance the sampler a specific distance (usually 12 inches or 300 mm) is recorded. This value is known as the "N-value" and represents the Standard Penetration Resistance. As the split-spoon sampler penetrates the soil, it collects soil samples within its interior. The collected samples are considered disturbed due to the dynamic nature of the penetration, but they provide valuable information about the soil composition.