Superhighway Two Driveway Tunnels Two The Stage Design's Methods Study

Two driveway tunnels occupy greater comparison in the our country highway tunnel, but at design with under construction still have a lot of problems, particularly is face a geology condition complications, start construction difficult mountain area, how work well a design, excellent turn a construction, science ground combines design and construction to complete item, became a point problem.Currently, it is widespread to adopt a new Ao method principle in the tunnel design, but new Ao method the principle carves to protect design to still have no at home and abroad to the Chen united of standard, the main design method includes 3 kinds:Engineering ratio method, mechanics analysis method and the supervision measurement feedback method, three kinds of methods are each to have it the applicability tie limit:1.Engineering compare a methodThe engineering ratio method is a current anchor man to spray to protect the most extensively applied method in the structure design.The engineering ratio method is mainly draw up to round rock ratings the foundation of the form up, combine to draw up to set up the conditions, such as rock grade and engineering structure size...etc. of the round of engineering, according to experience of build up the similar underground engineering already, directly make sure that the anchor man sprays to protect parameter and construction method.2. The mechanics analyzes a methodThe mechanics analysis method is measurese a rock body and pay under the premise of protect the mechanics parameter, according to round the rock mechanics mechanics model of the characteristic establishment, pass a calculation assurance the method which protect parameter.The mechanics analytical method which usually adopts currently has the resolution method(limited dollar the method, boundary dollar method etc.) and pole of the theories resolution method(if refrain from rash action to control a method), number to fasten structure analysis a method etc..3. Supervise and control measurement feedback a methodSupervise and control measurement feedback a method to take measurement information as to confirm and revise the basis of design, use to make sure that the anchor man sprays to protect parameter, pays to protect opportune moment and starts construction the design method of method.Combine construction process, it simultaneously carry on various measurement of item contents, part the result feedback of the measurement to design with under construction, make protect structural design and construction to match more or close the spot engineering actual, can also adapt to much change of geology condition and various different construction meanses, as a result say the spot supervision measurement feedback the method be more more more reasonable than method than engineering with more practical credibility.This text aims at two characteristics and existent problem of driveway designs, with new Ao legal theory theory for point of departure, combine the diagrams to the Hun spring superhighway plank stone tunnel engineering to design a solid example, adopt two stages design, three kinds of design the method counteract of comprehensive design method to two driveway tunnels of the design make the research of one system.First stage:Adopt an engineering ratio method first, draw lessons from former of similar engineering experience, first step draw-up tunnel of the early protect and prepay to protect parameter, two Chens to carve thickness and start construction a method.Then pass 3D play Su a limited dollar a method to carry on number emulation to the whole construction process of tunnel, analyze to round a rock in the construction process of in response to dint with transform of pay to protect and round the stable circumstance of rock in variety and the whole process.Second stage:Pass construction process in to the structure system of"round a rock- pay to protect" of the mechanics dynamic state carry on valid spot supervision a measurement, with its information for provide to analytical paid to protect in the early years of stable circumstance, judge two Shi Zuo4's opportune moments that the Chens carve, and to design in with physically not agree with of pay and protect the parameter carried on a modification and make it with actual the circumstance agree with.For the actual engineering problem of under construction emergence, concrete usage supervision the feedback processing of the measurement data and engineering ratio combine together, certain solution, perfect design. Physically prove that design method in the engineering application reasonable, have to certainly draw lessons from meaning in laterly of the dual the driveway tunnel the structure the design.