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根据锻锤基础及其地基土所承受的重复冲击载荷的特性,将连续损伤力学理论应用于锻锤基础系统的疲劳损伤问题,分析了地基土在重复冲击荷载作用下的疲劳损伤特性。研究表明,振幅随离基础中心距离增大而衰减,随离基础中心垂直深度的增大而衰减。同时,锻锤锻打引起的损伤增长对地基土表面或地基土深度上各点的最大振幅比都有极大影响。文中得出的结论具有一定的理论价值和工程实用意义。
According to the characteristics of forging hammer foundation and its repeated impact load, the continuous damage mechanics theory is applied to the fatigue damage of the foundation hammer system. The fatigue damage characteristics of the foundation soil subjected to repeated impact loads are analyzed. The results show that the amplitude decreases with the increase of the distance from the base center and decays with the increase of the vertical depth from the base center. At the same time, the growth of damage caused by forging hammer forging has a great impact on the maximum amplitude ratio of each point on the surface of foundation soil or foundation soil depth. The conclusion drawn in the article has certain theoretical value and engineering practical significance.