Abstract: The static load test is still the most intuitive and reliable method for determining the axial capacity of foundation piles. With the development of the economy, science and technology, the experience of engineering designers is becoming increasingly rich, and the axial capacity of the pile foundation design is also gradually increasing. High axial capacity piles pose great challenges to the testing work, and more attention should be paid to the safety, accuracy, and efficiency of the large tonnage tests. Given that the requirements for the large tonnage static load testing equipment and testing risks are much higher than those for the small tonnage, there are many safety hazards and difficulties in the testing process. Therefore, engineering inspectors must comprehensively consider a prudent treatment plan. The key points of the experiment were introduced in detail from the aspects of the equipment installation selection, axial capacity and deformation verification, and safety issues during the experiment. Solutions were explored, and relevant selection calculation methods were provided. A comprehensive analysis was conducted on each step based on engineering examples. Results show that this test method is stable and reliable and can accumulate experience and provide a useful reference for the large tonnage static load tests.

Key words: Large Tonnage, Static Load Test, Counterweight Platform Reaction Device, Axial Capacity, Test Safety