CAJ | 학술논문

为了研究桩在水平动荷载作用下的受力和变形规律，自制了一套能施加动荷载的加载装置，并对两根承力盘位置不同的模型桩进行了水平动荷载试验，研究了桩顶所加荷载幅值、加载频率、承力盘的位置等因素对支盘桩桩身弯矩和桩侧土压力的影响规律。结果表明：随着桩顶荷载幅值的增加，桩身上部正弯矩和弯矩的最大值均呈现增大趋势，桩侧土中压力亦逐渐增大；随着加载频率的增大，桩身上部弯矩先变大，后又减小，土中压力一直呈增大趋势；承力盘位置靠上的桩在同样条件下桩身正弯矩和最大弯矩值较小，桩侧土中的压力也较小。
위료연구장재수평동하재작용하적수력화변형규률，자제료일투능시가동하재적가재장치，병대량근승력반위치불동적모형장진행료수평동하재시험，연구료장정소가하재폭치、가재빈솔、승력반적위치등인소대지반장장신만구화장측토압력적영향규률。결과표명：수착장정하재폭치적증가，장신상부정만구화만구적최대치균정현증대추세，장측토중압력역축점증대；수착가재빈솔적증대，장신상부만구선변대，후우감소，토중압력일직정증대추세；승력반위치고상적장재동양조건하장신정만구화최대만구치교소，장측토중적압력야교소。
A dynamic loading equipment was made to study the load bearing capacity and deformation law of model pile under periodic load. In this paper the horizontal periodic load tests of two model piles with different plate position were carried out in the self-made soil box. The influence of the load amplitude, loading frequency, position of plate on the pile section moment and soil pressure were researched. The results show that the moment in pile body and the maximum moment increase with the increasing of load amplitude, and the soil pressure also in-crease at the same time. With the increase of the loading frequency, the moment in pile body increases firstly but decreases later, and the soil pressure keeps increasing. For the two model piles with different plate position, the moment in pile body and the soil pressure of the pile with plate nearer pile top are less than that of the other pile. Those results may be used in the practical engineering.