光伏支架微型锚固式抗拔桩承载特性试验研究

Experimental research on bearing capacity of micro anchored uplift pile of photovoltaic stent

为解决砂砾石地区光伏支架抗拔基础的工程应用问题,在对传统抗拔桩研究基础上提出了微型锚固式抗拔桩,并通过在西北砂砾石现场足尺试验,研究了桩径、桩长对微型锚固式抗拔桩传力特性与承载性状的影响特征。试验结果表明:桩的极限承载力随着桩径和桩长的增加而提高,但在抗拔受力过程中,桩身传力存在一个临界深度(约4 m),超过临界深度以后桩长对抗拔桩的承载力增加贡献较小。

In order to solve the problem of engineering application of sand gravel area PV bracket uplift foundations,in the traditional uplift pile is proposed based on the research of micro anchored pile,sand and gravel in the northwest and through the field test study on the influence of pile length to pile diameter,micro anchored pile and force transmission characteristics bearing behavior characteristics. The test results show that with increasing the pile diameter and length increase the ultimate bearing capacity of pile,but the pullout force of pile load transfer process,there is a critical depth（ about 4 m）,more than the critical depth of pile bearing capacity after long uplift pile increases little contribution.