预应力锚索有效预应力及其检测方法研究

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1、重庆交通大学硕士学位论文预应力锚索有效预应力及其检测方法研究姓名：黄庆龙申请学位级别：硕士专业：道路与铁道工程指导教师：罗斌20090330ABSTRACTPre-stressedanchorcabletechnologyisthefastestgrowingandthemostwidelyusedoftheslopeprotectiontechnologyinrecentyears．Pre-stressedanchorcableboltingrockCangivefullplaytotheself-supportingability,toregulateandim

2、provetheirownstrengthandhomeostasiscapacity,butalsoforthejointedrockslope，rockfaults，andweakbandtoprovideapowerfulactivesupportmeans，whicharetraditionalpre-stressedsupportmeasuresthatcallnotbeattained．Aroundtheslopeprotectionpre·stressedanchorproblem，combined谢tllMeng(zi)Xin(jie)Express

3、wayslopepre—stressedanchorquestions，usingtheoreticalanalysis，numericalsimulationandfieldtestofmultiplemeansandmethods，studiedanddiscussedthechangeofpre-stressinganddetection．①Throughnumericalsimulation,analyzedtheanchorcablemechanism，themainanalysisis：atthesameload，thedifferenceofrocka

4、ndsoilanchorforcestatus，cableaxialforce，shearstressofgroutbetweenthefreeanchorcableandfulllengthbondedanchorcable；theimpacttodeepsoilofdifferentinitialstress；theneutralpointoffulllengthbondedanchorcable；reinforcementeffectatthesameinitialpre．stresswithdifferentparametersofrockandsoil．②

5、Throughtheanalysisthetransmissionchannelsofanchorcable，pointingoutthatthecablefailureinfourways：outerfixedendfailure，tensilesectionfracture，inner-anchoringsectionfailure，anchorholefailure．⑨Byanalyzingthechangeslawofpre—stressedtoidentifythefactorsthataffectthelossofpre—stress，systemana

6、lysisthefactorsaffecting，andgivethepre—stresslosscalculationmethod．Analyzedrockandsoilcreepbynumericalsimulation，drawnontheeffectsofpre·stresslossfactorsandtheextentoftheimpactandlossanalysisofcreep、^，itlltimechanges．④Pointouttwomaindirectionsofpre．stresseddetectionofanchorcable．anddev

7、elopedacounter-pullmethodfordetectionpre—stressofcable，systemsanalysisofthemethodofdetectiontheory,testtechnology,theimpactoffactorstotestresults，post—processingmethodsandfinalassessment．FinallyputthenewmethodinfieldtestonMeng(zi)XinOie)Expressway．KEYWORDS：pre··stressanchorcable；nume