检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
机构地区:[1]河南理工大学土木工程学院,河南焦作454003
出 处:《铁道建筑》2015年第7期78-82,共5页Railway Engineering
基 金:国家自然科学基金项目(41072224);河南理工大学青年基金项目(Q2015-6A)
摘 要:基于能量原理建立预应力锚杆复合土钉支护体系的简化力学模型,分别对土体、土钉、锚杆应力—应变规律进行了分析。首先,对于土体,主要考虑基坑开挖产生的塑性变形,包括体应变与剪应变;其次,对于土钉,根据潜在滑移面界定的主动区与被动区,由剪应力及相对位移分别求解能量方程;再次,对于锚杆,在介绍承载机理与侧阻力计算模型的基础上,推导了锚固体单元的能量方程;最后,考虑土钉与锚杆的相互作用,假定预应力的影响范围,估算了预应力水平分力及竖向分力对滑移面任一点土体产生的附加应力。研究结果可以为该类工程设计提供较好的理论依据。The simplified mechanical model of prestressed rock bolt and soil nail composite supporting system was established based on energy principle and the soil,soil nail and rock bolt stress-strain law were analyzed respectively.Plastic deformation including the volumetric strain and shear strain caused by foundation pit excavation was mainly considered for soil,energy equation was solved by shear strain and relative displacement for soil nail according to the active zone and passive zone defined by the potential slip surface,the energy equation of the anchor solid element was deduced by introducing the load bearing mechanism and calculation model of side resistance,and additional stress of the slip surface soil at any point produced by prestress horizontal component and vertical component was predicted by considering interaction between soil nail and rock bolt and assuming the prestress influence range.The results could provide a good theoretical reference for similar engineering design.
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.33