微型桩单桩加固滑坡体的模型试验研究

MODEL TEST STUDY ON LANDSLIDE REINFORCEMENT WITH SINGLE MICROPILE

通过开展滑坡基本参数试验和微型桩加固滑坡体的模型试验,研究微型桩单桩加固滑坡体的承载机理、受力情况及破坏模式。结果表明:微型桩可有效提高滑坡的稳定系数,采用微型桩加固滑坡后,可将滑坡的稳定系数由0.96提高至1.35;微型桩所受的滑坡推力呈上小下大的三角形分布,滑床抗力呈上大下小的三角形分布,且随加载量的增加合力作用点逐渐向滑面靠近;微型桩于滑面附近发生破坏,其破坏模式可判断为弯剪破坏。

This paper uses landslide and mlcroplle model tests to examine the control mechanlsm, shding iorce and the damage form of single micropile for landslide reinforcement. The test results show that the micropile can enhance the stability of landslide effectively. After the landslide is reinforced with micropile, the stability coefficient of the landslide can be increased from 0.96 to 1.35. The landslide pushing force and the landslide bedding resistance are found to have triangle distribution. The focus of the resultant force approaches to the sliding face. The micropile damages near the sliding face. The damage forms of micropile can be defined as cutting and bending failures.