CAJ | 학술논문

对贵州三穗黎平高速公路风化板岩路堤试验段路基不同深度埋设动土压力盒，用两种重型压路机振动压实测试不同深处竖向、水平动力响应。结果表明，振动波在土中近距离传播时频率基本保持不变或略有降低，土粒在动应力作用下处于加压卸载的循环过程；大功率压路机对表层土产生明显推挤作用并造成表层填料松散；动应力在土中以一定角度向下扩散，不同压路机扩散角亦不同；据波动理论推导所得动应力在土中随深度以指数函数衰减获得试验数据验证，竖向动应力衰减系数是水平动应力衰减系数的2倍；超大功率压路机产生的动应力水平远大于重型压路机，重型压路机在土中局部产生共振现象；实测动侧压力系数非固定值且随深度增加线性增大。
대귀주삼수려평고속공로풍화판암로제시험단로기불동심도매설동토압력합，용량충중형압로궤진동압실측시불동심처수향、수평동력향응。결과표명，진동파재토중근거리전파시빈솔기본보지불변혹략유강저，토립재동응력작용하처우가압사재적순배과정；대공솔압로궤대표층토산생명현추제작용병조성표층전료송산；동응력재토중이일정각도향하확산，불동압로궤확산각역불동；거파동이론추도소득동응력재토중수심도이지수함수쇠감획득시험수거험증，수향동응력쇠감계수시수평동응력쇠감계수적2배；초대공솔압로궤산생적동응력수평원대우중형압로궤，중형압로궤재토중국부산생공진현상；실측동측압력계수비고정치차수심도증가선성증대。
For the weathered slate embankment test section of Sansui-Liping highway in Guizhou province,through burying earth pressure boxes at different depths in the embankment,and by using two kinds of vibratory compaction rollers,the vertical and horizontal dynamic responses at different depths were tested in field.The results show that:when the shock wave is propagating in the soil within short or middle distance,the frequency of the vibration wave remains constant or decreases slightly.Soil particles are submitted to the process of pressure loading-unloading cycle under the action of dynamic stress.High-power roller produces significant push effect on topsoil and looses skin fillers.Dynamic stress diffuses downward in the soil at a certain diffusion angle and different roller makes different diffusion angle. According to the wave theory,the dynamic stress decays exponentially along the depth in the soil,and this conclusion has been verified by the test data.The attenuation coefficient of vertical dynamic stress is twice as large as that of horizontal dynamic stress.Dynamic stress levels generated by super power roller are far greater than those by heavy roller.Heavy roller may induce local resonance phenomenon in the soil.The measured dynamic lateral pressure coefficient is not a fixed value,it increases linearly with the increase of depth.