Research Into The Distribution Of The Bias Arch Tunnel Elastic Resistance

In the calculation of tunnel lining, elastic resistance distribution law reflects therelationship of the lining and the formation, which has a great influence on the structuralinternal force. It is a problem that deserve considering.In the current work, unsymmetrically loaded tunnel elastic resistance distribution lawoften been used the Bukayeva method. The Bukayeva method presume the curvature of thetunnel structure can not consider to the form of tunnel structure, the size and combinationform of the load and the elastic resistance coefficient, etc. So the internal force calculationresults and actual situation has great discrepancy. This article aims at the insufficient of theBukayeva method and puts forward a new method-the iteration method to successiveapproximation of exact solutions of the elastic resistance based on the local deformationcoordinated theory of structure and surrounding rock.At the same time, based on the superiority and operation of the MATLAB programming,to achieve a good result what the iterative method to determine the distribution of the processof elastic resistance and gives a designed calculation program of arch tunnel.In the actual situation, when calculations the bias tunnel, according to the geometryparameters of surrounding rock and tunnel section that has been given, input the data of thetunnel parameters and initial directly, you can quickly determine the resistance distributionand internal force of elastic size bias tunnel.Combined with specific data, using the calculation procedure which is be given, the mostobvious sign-for the terrain slope angle as bias analysis parameters, analyzed the influence ofelastic resistance and internal force of arch tunnel under different slope angle, andsummarizes the corresponding rules, and provide a theoretical basis for the design andconstruction and operation of the shallow bias conditions arched tunnel.