Abstract
Bidirectional static load tests to evaluate the axial load-bearing capacity of large cross-sectional bored piles are indispensable. Nonetheless, this test is complicated, costly, and easy to fail. A case history of a bidirectional static load test conducted in HoChiMinh City is reported and analyzed. In particular, a bored pile with 1.8m in diameter and ∼60m in embedment length, located in Tan Binh district, HoChiMinh City, is tested using the bidirectional static load test. The testing load is close to 48MN. The state-of-the-art methods to analyze the data of bidirectional load tests such as back-calculation, constructing equivalent load-displacement curve as head-down static load test, will be adopted then the lessons learned from the case history are elucidated. A guideline to carry out a bidirectional load test is presented. In essence, this study could facilitate the success of bidirectional load tests conducted on large cross-section bored piles.
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