PY series

The pressuremeter test is an in-situ testing method used to achieve a quick measure of the in-situ stress-strain relationship of the soil. In principle, the pressuremeter test is performed by applying pressure to the sidewalls of a borehole and observing the corresponding deformation.
The pressuremeter consists of two parts, the read-out unit which rests on the ground surface, and the probe that is inserted into the borehole (ground). As the pressure increases, the borehole walls deform. The pressure is held constant for a given period and the increase in volume required for maintaining the constant pressure is recorded. A load-deformation diagram and soil character-istics can be deduced by measurement of the applied pressure and change in the volume of the expanding mem-brane.
From the test readings (volume variation based on con-trolled pressure), a stress-strain curve can be obtained, in the case of plane deformation, which yields:
·the Ménard Pressuremeter modulus
·the creep pressure
·the Menard limit pressure

TECHNICAL PARAMETERS

PY-3
Probe
Structure: 3-CELL
Nominal external diameter: ø60mm
Measuring chamber length: 250mm
Total length of the probe: 800mm
Measuring accuracy
Min. reading of pressure gauge: 0.01Mpa
Effective measuring range: 400mm
Error: ≤±1%
Others
Maximum test pressure: 2.5Mpa
Cross-sectional area of measuring tube water column: 13.58cm2
Measuring tube volume: 580cm3
Dimensions: 830×360×220mm
Weight: 28kg
Application: Cohesive soil, silty soil, etc.

PY-4
Probe
Structure: 3-CELL
Nominal external diameter: ø60mm
Measuring chamber length: 250mm
Total length of the probe: 800mm
Measuring accuracy
Min. reading of pressure gauge: 0.01Mpa
Effective measuring range: 400mm
Error: ≤±1%
Others
Maximum test pressure: 4.0Mpa
Cross-sectional area of measuring tube water column: 13.58cm2
Measuring tube volume: 580cm3
Dimensions: 830×360×220mm
Weight: 28kg
Application: Hard cohesive soil, silty soil, sandy soil, etc.

PY-5
Probe
Structure: 3-CELL
Nominal external diameter: ø60mm/Ø74mm
Measuring chamber length: 250mm/210mm
Total length of the probe: 800mm/850mm
Measuring accuracy
Min. reading of pressure gauge: 0.01Mpa
Effective measuring range: 400mm
Error: ≤±1%
Others
Maximum test pressure: 5.5Mpa
Cross-sectional area of measuring tube water column: 13.58cm2/20cm2
Measuring tube volume: 580cm3/860cm3
Dimensions: 830×360×220mm
Weight: 28kg
Application: Cohesive soil, silty soil, sandy soil, strongly weathered rock, soft rock, etc.