桥台背路基受强夯振动力作用的模型试验研究

Research on the model experiment about back subgrade of abutment under vibrating force through strong tamp

针对桥台背路基强夯处理问题开展了模型试验研究 .基于几何相似、运动相似及动力学相似原理设计模型桥台及夯击功能 ,在桥台上布设了应变计、位移计及加速度计 .通过对桥台背路基不同布设夯点的方式进行强夯试验 ,研究了桥台上应变、位移和加速度分布规律以及桥台的永久变形及其累积规律 。

The model test which is built up according to the subgrade tamping treatment of bridge abutment back is discussed.Based on the theory of geometric similarity,kinematics similarity and dynamics similarity,the model of bridge abutment and the tamping energy are defined.In the bridge abutment,the deformeter?displacement manometer?accelerometer are fixed.Through the tamping test which is taked in the different points of the abutment back,the principle of strain?displacement and acceleration speed distribution and the bridge abutment permanent deformation as well as the laws of cumulating can be drawn,meanwhile,the preference for engineering design and construction is offered.