隧道围岩渐进性破坏及围岩压力预测方法研究

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1、重庆交通大学硕士学位论文隧道围岩渐进性破坏及围岩压力预测方法研究姓名：王唢申请学位级别：硕士专业：水工结构工程指导教师：赵明阶20090401ABSTRACTThisarticleunifies曲e‘铀ehighwaytunnelrelaxationloadpredictiontheoryandtheearlywarningsystem(No．200631874024)’’ofMinistryofCommunicationstechnologicalproject，evolvestwoanglesembarkingfromthesurroundingrockclaSsification

2、andthesurroundingrockdamage，relatesthescenemonitoringgaugingdataelaSticvenicalwavevelocity，unionsnumericalvaluesimulationanalysisaswellastheoreticalanalysismethodsandSOon，analyzesthesurroundingrockpressureevolutiontendencyofthetunnelsurroundingrock，focusonstudyingforthehighwaytunnelrelaxationloa

3、dforecastmodel，asfllows：(1)Staningwiththesurroundingrockclassificationandtheinitialdamage’Srelativity，itanalyzesanddiscussesthedamageevolutionaryprocessofsurroundingrockduringtunneldiggingprocess．Thenitestablishstheconnectionbetweenthedamagevariableandthesurroundingrockmechanicsparameters，namely

4、ithasbeenestablishedtheconectinbetweentheelasticwaveverticalwavevelocityandthesurroundingrockmechanicsparameters．(2)Accordingtothedamagemechanicstheoryofstabilityanalysesofsurroundingrockintheundergroundholeroomundertheconditionofdischargeload，itadoptsthemethodwhichisbasedontheDPcriteriondynamic

5、changeparametersofsurroundingrock．researchingfortheANSYSnumericalsimulationduringthediggingprocessofthesurroundingrock，establishsmacroscopicmechanicalmodelofsectionstunnelsun．oundingrock，sevolutiondestroysduringtheprocessofdigginganddischargingload，(3)Accordingtotheresultsofnumericalsimulation，i

6、tanalyzessurroundingrock。Sdisplacement，stress，strainaswellastheplasticarea'sdistributedsituation，thenobtainsthegradualdestructionruleoftunnelsurroundingrock．(4)Duingtotherelationbetweensurroundingrockclassificationandthesoundwavevelocity．whichimprovedtheBieniawskiempiricalformula,promotedthesurr

7、oundingrockpressureforecastmodel，whichisbasedontheempiricalformula；Atthesametime，wehaveestablishedanothersurroundingrockpressureforecasttechniqueaccordingtothetunnelsurroundingrock'sevolutionfailuretheory．(5)Basedonthemonito