Model test study and numerical analysis of mechanism of anchor bolt under different supporting conditions

作者：Chen Hao^*; Ren Wei Zhong; Shu Zhong Gen; Li Dan

来源：Yantu Lixue/rock and Soil Mechanics, 2012, 33(SUPPL. 1): 277-282.

• Anchor bolts
• Axial forces
• Chongqing
• Deep tunnels
• Key parts
• Model materials
• Model tests
• Physical model test
• Progressive failure
• Rock mass
• Similar models
• Soft rock tunnel
• Strain measuring
• Stress field
• Surrounding rock
• Test equipments
• Ture triaxial model-test machine
• Whole process

According to rock character of a certain soft rock tunnel of Chongqing to Changsha highway, similar model materials and supporting test equipments are developed to reproduce the whole process of progressive failure of surrounding rock under different supporting conditions. Through solving a series of technological matters in execution and installation and testing, by using the strain measuring technology, the strain of key parts of the surrounding rock under different supporting conditions are measured;according to this, the variability of the stress of surrounding rock are studied. By model materials laboratory determining the related parameters of rock mass, the numerical simulation are worked with the same boundary condition as the model test, according to this, the stress field and the deformation of the surrounding rock are studied;the variation of the axial force of the anchor bolt is studied. We compare the variation of stress of the surrounding rock and the variation of the axial force of the anchor bolt under different supporting conditions of the model test with the numerical simulation and draw the conclusion that the two processes coincide with each other.

• 出版日期2012-9
• 单位武汉科技大学