摘要
将锚杆拉拔位移分解成自由段的弹性变形、锚固段的拉伸变形和锚固段与土体之间的相对剪切位移。分析锚杆自由段长度、锚固段长度、锚杆体截面积、浆体强度、锚杆孔径及土层剪切模量与锚杆弹性模量的比值等因素对锚杆位移的影响。在此基础上,假定锚固段与其周围土体之间的剪应力与剪切位移呈线性递增关系、锚固段所受的轴力呈抛物线分布,建立锚杆荷载与位移之间的关系式。
The pulling displacement of the anchor bolt is broken down into the elastic deformation of the free segment, the tensile deformation of the anchored segment and the relative shear displacement between the bolt and soil. Factors affecting the displacement of anchor bolt are analyzed, such as free segment length of the anchor bolt, the length of the anchored segment, the section area of the anchor bolt, strength of concrete, bore diameter of anchor bolt, shear modulus of soil and elastic modulus of the anchor bolt. On this basis, it is assumed that the shear stress increases by degrees with shear displacement linearly between the bolt and surrounding soil, the axis force acting on the bolt distributes in the form of a parabola, and the relational expression between the load and the displacement of the anchor bolt is established.
出处
《中国铁道科学》
EI
CAS
CSCD
北大核心
2004年第5期94-96,共3页
China Railway Science
关键词
边坡支护
锚杆
位移量
变形分析
Bolts
Deformation
Elasticity
Loads (forces)
Shear strength
Soils
Tensile strength
