Experimental Study On Deformation And Failure Of Characteristics Of Equivalent Anchoring Rock

Economic development led to the rapid development of China's infrastructure construction,highway,water,electricity,subway,railway,national defense construction and municipal roads and other architectural design and construction system is increasingly complete.In order to enhance the utilization rate of space,various forms of underground building structure are more and more,the design and construction of underground architecture has made great progress,and has narrowed the distance with the world advanced level.Underground construction environment conditions and superstructure are essentially different,long time use the theory and method of ground engineering,and various mechanical problems cannot be reduced for underground construction preparation,this lead to the design and construction of underground construction rely more on the field experience,and cannot satisfy the development of underground buildings.This paper,the real change of rock under the anchorage state is reduced.The sandstone is chosen as the research object.Firstly,the rock uniaxial experiment is carried out,and the basic physical parameters are obtained.Then the new modified model,the standard of rock with a diameter of 50 mm and height of 100 mm specimen added width 10 mm,thickness of 1.5mm steel bolt model simulation,the overall state of the rock anchorage,conventional triaxial compression tests of the three failure modes of rock anchorage simulation condition.The three axis TAW-2000 servo controlled rock instrument in rock for comparative analysis has no effect on the surrounding rock anchorage provides reliable evidence from indoor experiment analysis of support and surrounding rock the interaction.Based on the analysis of the failure mode of the anchored rock mass,constitutive model and the numerical simulation software,through the analysis of the use of ANSYS and FLAC 3D software the whole failure process of rock model added steel ring,using Origin software to fit the variation curve and the fitting degree is high,verify therationality and feasibility of the rock anchorage the equivalent model,provide a theoretical basis for the practical engineering.The failure mode,stress distribution and deformation characteristics of rock under the condition of support are compared and analyzed.