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Down-hole/cross-hole tests

Down-hole/cross-hole tests

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Down-hole/cross-hole tests

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  1. Down-hole/cross-hole tests • Down-hole/cross hole tests are in-situ test methods - to measure dynamic soil/rock properties - to determine P-wave and S-wave velocities - to identify soil stratification - to determine shear modulus, G =r.vs Down-hole/cross-hole/krishna Aryal

  2. Surface source S-wavearrival time, t vs = dz/dt Layer 1 Transd. 1 Layer 2 Transd. 2 Depth, z Down-hole Seismic test Down-hole/cross-hole/krishna Aryal

  3. Receiver Source of impulse Receiver Source of impulse a) Down-hole test b) Up-hole test Down-hole test Down-hole/cross-hole/krishna Aryal

  4. Source Receiver L Cross-hole test 2 boreholes arrangement Down-hole/cross-hole/krishna Aryal

  5. Source Receivers L Cross-hole test 3 boreholes arrangement Down-hole/cross-hole/krishna Aryal

  6. Down-hole testing Down-hole/cross-hole/krishna Aryal

  7. Results P and S-waves are determined from the t-z plot Down-hole/cross-hole/krishna Aryal