The Law Analysis And Prediction Model Development On Displacement Field Of Surrounding Rockmass Of City-Opening Shaped Tunnels

This article focuses on the construction of the rapid development of information technology for the city openings based design and construction of underground tunnels and move forward on the basis of the previous studies. Absorption of existing results and doing further research of a more comprehensive functional, performance, better, more friendly interface, intelligent rock deformation prediction system, speed up the pace of information technology of construction. The main contents are as follows:(A) Application BP neural network, establish prediction model without fault effects, which can predict distortion of surrounding rock mass when the deformation modulus, Poisson's ratio, cohesion, internal friction angle, chamber depth, cross-hole, high-span ratio, coefficient of lateral pressure are arbitrary. Study the rules of deformation and stability of underground caverns without faults(B)Use our predecessors' research results on the impact of faults on the cavern deformation,because the "simulation platform on deformation fields and stress field of surrounding rock of underground cavern " (version 1.0) is only available for a specific size limitations of the underground cavern,I make improvements, so the system can predict distortion of surrounding rock mass with single fault when the deformation modulus, Poisson's ratio, cohesion, internal friction angle, chamber depth, cross-hole, high-span ratio, coefficient of lateral pressure are arbitrary. scope of application expanded rapidly.(C)Do intensive study based on predecessors on the impact of the law of the stability of underground caverns with double-faults,through a large number of numerical simulation tests,applied BP neural networks,establish prediction model with two faults, which can predict distortion of surrounding rock when the deformation modulus,Poisson's ratio, cohesion, internal friction angle, chamber depth, cross-hole, high-span ratio, coefficient of lateral pressure are arbitrary. Study the rules of deformation and stability of underground caverns with two faults.(D)Used FORTRAN and VB languages to develop a set of intelligent analysis platform software with non-fault, single fault, double fault rock cavern Deformation Prediction Systems,and used LAXIWA plant for example to explain in detail the steps of the software.Finally push the theory to accept the tests of practice.