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Bi-directional static load testing is an innovative pile testing method. In the US, The test is also known as O-cell load test, which is named after Prof J. Osterberg. In China, the test is developed by Prof. Gong Weiming, and is known as self-balance load test.Read More...
Low strain integrity testing (also known as low strain dynamic test, sonic echo test) is a non-destructive pile testing method for integrity assessments of drilled shafts or driven concrete piles.
The test is performed with a hand held hammer, a sensitive accelerometer and the Pile Integrity Tester (PIT).
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Crosshole Sonic Logging (CSL, also known as Crosshole Acoustical Testing) checks the integrity of drilled shafts.
It normally requires steel or PVC access tubes installed during the construction of the drilled shafts. These tubes are usually attached to the reinforcement cage along the full length of the shafts. The cage is then lowered into the hole and the concrete is poured.Read More...
Considering the strain incompatibility between end bearing and side friction of drilled shafts, tip capacity is often discounted from total shaft capacity. This is due to the relatively large displacements required to mobilize the tip which often exceed service load displacement criteria.Read More...