CAJ | 학술논문

对黄土冲沟区域的地质特点进行了总结，针对冲沟滑坡、泥石流、土体流失等对桥梁下部结构的影响建立了力学模型，分析了地质灾害对桩基安全性的影响，结果表明，桩基位于〉中沟坡体不同位置时，土体流失对桩基的性状（桩侧土体作用力、桩基自由长度、挠曲曲线第一零点位置、最大弯矩值降低量、横轴向位移增大量、横轴向承载力减小量、稳定程度减小量等）的影响有着显著区别；提出了滑坡推力和泥石流冲压力作用下墩台及桩基内力计算方法；针对不同的影响因素提出了相应的防治工程措施。
대황토충구구역적지질특점진행료총결，침대충구활파、니석류、토체류실등대교량하부결구적영향건립료역학모형，분석료지질재해대장기안전성적영향，결과표명，장기위우〉중구파체불동위치시，토체류실대장기적성상（장측토체작용력、장기자유장도、뇨곡곡선제일영점위치、최대만구치강저량、횡축향위이증대량、횡축향승재력감소량、은정정도감소량등）적영향유착현저구별；제출료활파추력화니석류충압력작용하돈태급장기내력계산방법；침대불동적영향인소제출료상응적방치공정조시。
The paper summarizes the geological features of loess gulch region, establishes mechanical model in light of the impacts of bottom bridge structure owing to gulch landslide, debris flow and soil loss and so on, analyzes the impacts of such geological disasters upon the pile foundation safety. Results show that： when the pile foundation is located in various parts of gulch slope, there is obvious influence of soil loss upon the pile foundation（ such as side-pile soil action, free pile foundation length, the first zero location of reflection curve, maximum bending volume, horizontal axial displacement increasing value, horizontal axial bearing capacity reducing value, and stability reducing value etc. ）. And then, it puts forward the pier and internal pile foundation calculation method under the slope pushing force and debris flow compaction. In the end, it puts forward corresponding preventive measures in light of different influential factors.