挤密砂桩振动沉桩可打性分析中必要振幅的 试验研究.

The vibration force and amplitude are the two most important parameters in the analysis of the drivability ofcompacted sand pile vibration driving. The working amplitude is related to the mechanical equipment capacity and soilproperties, while the necessary amplitude is mainly related to soil properties. There are significant differences in theunderstanding of necessary amplitudes among the existing theories for analyzing the drivability of vibration driven piles. Inorder to better solve the problem of predicting the necessary amplitude for vibration pile driving, based on the analysis of thedrivability of compacted sand piles in the artificial island project of the Hongkong -Zhuhai -Macao Bridge and Tunnel, anacceleration sensor is installed on the sand pile pipe to monitor the entire process of compaction sand pile driving. Theamplitude time curve is obtained through quadratic integration. The measured amplitude under various soil conditions iscompared and analyzed with commonly used methods such as the Jiandiao Kobe Corporation Law of Japan, the ICE pile drivingtheory in the United States, and the PTC pile driving theory in France. Based on the measured results, the applicability andadvantages and disadvantages of the above vibration pile driving theory are compared and analyzed, and suggestions for thenecessary amplitude value method are given. The research results indicate that under the condition of using an electric vibrationhammer for pile driving, the necessary amplitude of the Jiandiao Kobe Corporation Law of Japan is larger, the necessaryamplitude of the French PTC method is smaller, and the regularity of the necessary amplitude of the American ICE method is ingood agreement with the measured results, but the value method is not specific enough. It is recommended to further refine andimprove the necessary amplitude values for vibration pile driving based on the ICE law in the United States and engineeringexperience. [ABSTRACT FROM AUTHOR]