Measurement of rock and soil, esp. during tunnelling in unstable material, - involves using measurement head mounted on stable pipe enclosing expanded casing and carrying force measurement cell
EP0387376A1
Pressure sensor
DE3435380A1
Borehole probe for measuring water pressures in foundation soil
DE3424248A1
Borehole probe
DE3211822A1
EXTENSOMETER
DE2912803A1
Soil movement pendulum inclinometer - has linear motion linkage, pneumatic transducer, and compensation fluid pressure sensor
GB2042738A
Extensometer for rock and soil mechanics
DE2906170A1
EXTENSOMETER FOR ROCK AND GROUND MECHANICS
DE2904844A1
Measuring and monitoring short term stresses in concrete - using mercury-filled pressure pad connected to indicator capillary
DE2753699A1
Foundations pore water pressure meter - has control unit vacuum source linked to inner chamber by outlet duct
