摘要
通过大型物理模拟试验和有限差分(FLAC3D)模拟,研究了黄土滑坡微型桩群桩破坏模式。现场试验及数值模拟结果表明,微型桩易发生破坏的区域为滑面上下各4倍桩径范围内,且其破坏形式以弯剪破坏为主;微型桩上滑坡推力的分布形式近似为三角形,推力在滑面处达到最大值;滑坡推力沿荷载传递方向依次递减;微型桩群桩的弯矩分布形式有别于传统抗滑桩,弯矩最大值出现在滑面附近。其成果为微型桩的研究与应用提供了理论基础。
Based on the tests with large-scale physical models and the numerical analysis, the failure modes of micropiles in loess landslide are studied. The results from field tests and numerical analyses indicate that the micropiles are usually broken in a way of bending shear and the failure zone varies in the range of the fourfold diameter of the micropiles; the distribution mode of the landslide thrust is triangular and the thrust reaches the maximum at the sliding surface; the landslide thrust on micropiles decreases gradually along with the direction of the load transfer while the distribution mode for bending moment is different from the common piles, and the maximum for the moment occurs at the sliding surface. The said results and conclusions could provide the theoretical basis for the further study and application of micropiles.
出处
《工程勘察》
CSCD
北大核心
2010年第10期19-22,共4页
Geotechnical Investigation & Surveying
基金
国土资源大调查项目(1212010814016)
关键词
微型桩
物理试验
数值分析
破坏形式
滑坡推力
micropile
physical test
numerical analysis
failure form
sliding thrust
