Information Construction Technology In Highway Long-span Tunnel

With a great deal of Long-span road tunnels' springing up(coming), it makes the engineer world do a series of research on long-span tunnels' mechanic effect and rock mass's stability in construction ,at the same time ,based on the experiments for the past engineering , pay attention to reopen the function by information construction in tunnel projects. Due to the particularity of the rock and soil's quality, lead the character of independence to each of engineering. On the background of successful application and guidance on construction, this text mostly introduce the guidance and coorperation action of information construction technology on Guanzhou Longtoushan super section long-span highway tunnel project.Longtoushan tunnel through geology include II, III, IV, V kinds of rock mass, adopt different construction and lining designed format with each kinds, for assuring the safety process of the construction, exercise information construction technology to guide the construction. Base on tunnel example, this text' s main research includes:(1) Via broad investigation on tunnel example at home and abroad, particularly expand construction methods and mechanic effect of long-span tunnel;(2) Particularly expand the theory of information construction technology, introduce emphasize on the action of monitoring survey in information construction technology, analyse the effect of the information from locale.(3) Do research on information construction technology in slope stability in entrance , stability of rock mass and technology of control blast in body section. Expand the effect of the information construction technology in projects, accumulate construction experience on long-span tunnel.(4) Adopt finite element to establish 3D slope model, compare the change of slope safety factor and displacements in slope surface between before timbering and after timbering. Analyse the local monitoring datum, observe the trends of solpe.(5) Adopt load-structure model and stratum-structure model method to calculate and compare the change regularities of stratum displacement and the force in structure via different construction methods and different bracing methods and different working procedure.(6) Analyse the change of displacements of rock-mass and force of structure on local monitoring, appraise the stability of the rock-mass. At the same time, adopt numerical analysis to ensure the distance between each cave and compare with the results from local monitoring datum.(7) Adopt finite element method to establish 3D model to simulate the effect of shaking caused by blasting load, get the vibration velocity of paticle in different distance, see the transimit regularities of seismic wave. Do regression analysis on the datum from the local monitoring and get the formula to calculate the velocity, forcast the velocity to control the quantity of detonator on purpose to guide the construction at one time.