CAJ | 학술논문

为了解土工袋挡土墙这一新型柔性挡土墙的动力特性，通过小型振动台模型试验，研究了地震三要素(输入加速度、振动频率、振动持续时间)以及土工袋大小对以天然河砂为填料的土工袋挡土墙动力特性的影响，分析了水平位移、动土压力以及加速度的变化规律。试验结果表明，输入加速度越大，振动频率越低，土工袋挡土墙位移与动土压力系数越大，加速度响应则随着输入加速度和振动频率的增大而增大，而振动持续时间对土工袋挡土墙的动力特性影响不大；与普通大小的土工袋相比，由大土工袋构筑的挡土墙抗震性能略差，但施工方便快捷，效率较高，可应用于抗震要求较低的地区或者工期较紧的工程。
위료해토공대당토장저일신형유성당토장적동력특성，통과소형진동태모형시험，연구료지진삼요소(수입가속도、진동빈솔、진동지속시간)이급토공대대소대이천연하사위전료적토공대당토장동력특성적영향，분석료수평위이、동토압력이급가속도적변화규률。시험결과표명，수입가속도월대，진동빈솔월저，토공대당토장위이여동토압력계수월대，가속도향응칙수착수입가속도화진동빈솔적증대이증대，이진동지속시간대토공대당토장적동력특성영향불대；여보통대소적토공대상비，유대토공대구축적당토장항진성능략차，단시공방편쾌첩，효솔교고，가응용우항진요구교저적지구혹자공기교긴적공정。
In order to understand dynamic characteristics of the new-type flexible retaining walls constructed with soilbags, small-scale shaking table model tests were conducted on retaining walls constructed with soilbags filled with natural sands. The effects of three elements of earthquakes, input accelerations, vibration frequencies, and vibration durations, as well as the size of soilbags, on the retaining walls were investigated, and change patters of horizontal displacements, dynamic earth pressures, and accelerations were analyzed. The results show that displacements of retaining walls and pressure coefficients of dynamic earth increase with the increase of input accelerations and the decrease of vibration frequencies, while the acceleration response increases with the increase of both input accelerations and vibration frequencies. However, the effects of vibration durations on dynamic characteristics are relatively small. In addition, compared with retaining walls constructed with normal-size soilbags, the seismic performance of retaining walls constructed with larger bags is slightly poorer. However, larger soilbags can be used in areas with lower seismic requirements or projects with tight schedules because of their ease of construction and high efficiency.