The Study On Anchorage Mechanism Of Rock And Optimization Of Anchorage Parameter

Underground engineering is one of the more modern foundation engineering in the prosperous engineering field in the 21st century. With an increasing demand for space, the underground space as a precious natural resource, its exploitation and utilization is the embodiment of the contemporary social progress. Appearing in large number of the underground parking and the underground stores is the use of underground space on important aspects of people.Metro as a safe, convenient, high-capacity transport tool, it plays an irreplaceable role on addressing urban transport problems, easing urban traffic pressure and improving travel conditions for people to reduce vehicle exhaust pollution. However, due to the particularity of the tunnel structure and the complexity of their environment, the tunnel construction has not yet been completely solved the technology problem on surrounding rock stability, the design of supporting structure parameter, lining the long-term safety and many other aspects, the stability of rock is particularly prominent.The article combines with construction and monitoring on interval tunnel of Dalian maritime university to Xueyuan square, discusses the mechanism of the surrounding rock anchorage systematically, analyzes on tunnel anchorage parameters to the effect of the stability of surrounding rock, realizes the constraint of the surrounding rock, and reflects bolting support can greatly improve the stability of surrounding rock ability.According to the role of anchor on mechanism of influence factors of anchoring effect analysis, use a test scientific method of orthogonal design principle that can deal with many factors. By adopting FLAC3D numerical simulation, evaluate the affected size and law on tunnel deformation about the anchor length, diameter, spacing and concrete spray layer of anchorage parameters etc. Based on particle swarm optimization algorithm for inverse analysis of anchorage parameters, finally, get the optimized parameters of the supporting structure, and bring it into the numerical model, comparing with the calculated result and the design result, the calculated result has good stability and economic benefits. Based on the research result of engineering example analysis, it has a certain theoretical and practical value for the stability of surrounding rock, and it can give the theoretical guidance and some help for the appropriate engineering design and tunnel construction.