扩孔微型桩抗震性能试验研究
Experimental investigation on seismic performance of micropile with predrilled oversize hole

对6根具有不同扩孔参数的微型桩进行室内足尺低周循环侧向加载试验，得到滞回曲线和骨架曲线，并计算耗能能力和延性系数，对其抗震性能进行评估. 所得结论可为新型抗震型半整体式桥台桥梁的实际应用打下基础，对整体式桥台桥梁支承桩的扩孔技术也有一定借鉴意义.
Indoor full-scale cyclic lateral loading experiments of 6 micropiles with different predrilled hole parameters were carried out. From the experiments，their hysteresis curves and skeleton curves，as well as energy dissipation capacity and ductility were obtained to reflect seismic performance. These conclusions will make contribution to the practical application of proposed aseismic semi-integral abutment bridge and provide reference for the hole-predrilling technology in integral abutment bridges