摘要
运用地质力学模型试验方法,完成了微型桩与滑坡体共同作用的大型物理模型试验,研究滑坡防治中微型桩的受力分布规律与破坏模式。试验结果表明:微型桩各排桩在滑坡滑动时同时受力,各排桩的受力分布情况基本相同。微型桩所受滑坡推力基本呈梯形分布,滑面附近土压力较大;第一排桩的桩前滑体抗力呈倒三角形分布,其余各排桩的桩前滑体抗力呈抛物线形分布;桩后滑床抗力较小,呈矩形分布;桩前滑床抗力主要分布于滑面附近。微型桩各排桩同时发生破坏,破坏区域位于滑面上下各3倍桩径左右的范围内,为弯曲与剪切相结合的破坏模式。
Large scale model test on micropiles and landslide are carried out by geological model experiment techniques. The force distribution rule and damage form of micropiles for landslide reinforcement are studied. The test results show that micropiles suffer the force at the same time when landslide slides. The force distribution rule of every micropile is similar. The landslide-thrust distributes as trapezoid and that near the sliding face is large. The resistance of sliding mass of the first micropile is distributed as inverse triangle and that of other micropiles are distributed as parabola. The resistance of sliding bed behind the pile is small and distributed as rectangle. The resistance of sliding bed in front of the pile focuses near the sliding face. Every micropile damages near the sliding face at the same time. The damage form of micropiles can be defined as cutting and ben- ding failure.
出处
《南水北调与水利科技》
CAS
CSCD
2010年第1期44-48,共5页
South-to-North Water Transfers and Water Science & Technology
基金
国土资源部国土资源大调查项目(1212010814016)
关键词
微型桩
滑坡
受力分布
破坏模式
模型试验
micropiles
landslide
force distribution
damage form
model test
