关键词: 土质边坡, 大型振动台试验, 微型桩, 地震作用, 地震动土压力, 地震加速度峰值

Abstract: China is an earthquake-prone country. The micro-pile composite structure is a new type of flexible supporting structure, and its supporting effect on the soil slope under the earthquake action has become a significant problem. Therefore, the dynamic characteristics of the micro-pile composite structure on the reinforced soil slope were studied by large-scale shaking table test under mixed loading. The test results demonstrate that the micro-pile composite structure achieves an ideal effect on the reinforcement of the soil slope under the earthquake action. With the increase of the peak value of the El wave acceleration, the peak acceleration and the dynamic pressure of the pile body in the front and back rows increase gradually. With the increase of the peak value of the input El-Centro acceleration, the response effect of the soil pressure is also more significant. The earth pressure and acceleration often reach the maximum values at the upper and lower 1/3 positions of the slide surface, the top of the cantilever end and the bottom of the anchorage section, which should be paid attention to these positions in practical engineering design and application. The research results can provide support for the seismic design of similar landslides in similar areas.

Key words: soil slope, large-scale shaking table test, micro-piles, seismic action, seismic dynamic soil pressure, peak seismic acceleration