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In the anchor/cable and column depth test, how does the sensor placement direction affect the test results?
According to the test results, the effect on the length test results is relatively small, but the influence on the reflection energy is relatively large (that is, it has a great influence on the grouting index). According to the test results, the outward reflection energy of the sensor is larger than the sensor. The reflected energy inside is 36.3% higher. In general, the sensor should be placed outward in the column and rock anchor test, which helps to identify and pick up the reflected signal.