摘要
考虑地层分层特征,根据剪切位移法基本原理,推导了拉拔荷载作用下层状地层全长粘结型锚杆位移、轴力及锚固体周边剪应力解析解,并结合FLAC模拟算例对比验证该方法的可行性;研究发现地层间界面处锚杆周边剪应力及轴力分布分别存在突变点和折点,其变化程度与地层物理力学性质有关,对此,提出了层状地层全长粘结型锚杆布置方案的建议。
Based on the shear displacement method and characteristics of soil distribution, the analytic solutions arepresented for anchor displacement, shear stress and axial force of wholly grouted anchor embedded in layered soil under pull force, the correctness is verified by engineering example compared with FLAC numerical calculation. It is discovered that the distribution curves of anchor shear stress have jump points, and the distribution curves of anchor axial force have turned the points in the layered soil interface, the amplitude of variation have some connection with physical and mechanical properties of layered soils, so, the installment measure of wholly grouted anchor embedded in layered soil is suggested.
出处
《岩土工程技术》
2012年第1期28-30,45,共4页
Geotechnical Engineering Technique
关键词
层状地层
全长粘结型锚杆
拉拔荷载
剪切位移法
力学效应分析
layered soil
wholly grouted anchor
pull force
shear displacement method
mechanical effect analysis
