圆形均布荷载下基于Boussinesq及Mindlin解的压力型锚索应力分析  

Stress analysis of pressure-type cable based on Boussinesq and Mindlin Solution under circular uniform distributed load

作　　者：叶红[1] 

机构地区：[1]武汉交通职业学院交通工程学院,湖北武汉430065

出　　处：《化工矿物与加工》2016年第12期41-46,共6页Industrial Minerals & Processing

基　　金：国家自然科学基金面上项目(51374163);湖北省教育厅科学技术研究自然科学类项目(B2015337);湖北省自然科学基金面上项目(2014CKB499)

摘　　要：为了从理论方面丰富压力型锚索的研究内容,结合Boussinesq解及Mindlin解的叠加解,推导了在圆形均布荷载作用下注浆体所受到的压应力表达式以及锚索孔壁所受到的剪应力表达式;探讨了承压板半径、锚索孔半径、预应力荷载大小及泊松比对压力型锚索锚固机理的影响。研究结果表明:应力分布曲线随着承压板半径或锚索孔半径的增加而变得平缓;应力值与预应力荷载大小成正比变化;随着岩体泊松比的增加,注浆体所受到的压应力分布曲线变得陡峭,而锚索孔壁所受到的剪应力分布曲线则变得平缓。研究成果可进一步为压力型锚索设计提供参考。In order to enrich the theory research content of an- chor mechanism of cable, Boussinesq solution and Mindlin solu- tion were superimposed and the approximate solution to compres- sive stress and shear stress in anchor segment grout of pressure-type cable were derived under the circular uniformly distributed load. The anchor hole radius, the bear plate radius, the pre stressed load and the Poisson＇s ratio on the compressive stress of grout and the shear stress of the contact surface were discussed. The results showed that with the increase of anchor hole radius or bear plate radius, stress distribution curve were flatten out. The stress value were proportional to the pre-stressed load. With the increase of Poisson＇s ratio, compressive stress distribution curve changed so rapidly and shear stress distribution curve were flatten out. The research results could provide a theoretical reference for the pressure type cable design.

关 键 词：压力型锚索Boussinesq Mindlin锚固机理 应力分析 

分 类 号：TD584.6[矿业工程—矿山机电]