高等土力学模拟考题3及答案范文

在当今的科学发展飞速的新时代，越来越多的高科技开始运用于我们的学习、工作和生活当中。科技，已成为我们走向高质量生活的一座桥梁，一根绳梯。ofvision.3,build,fittinginwiththeurbanmasterplaninYibincityrapidrailtransitlongtermnetwork,aswellasthevisionofYibincity,andfuturedevelopmentofrailtransitnetwork.4,Yibincity,preliminaryrailtrafficlevelsservicelevels,systemmodel,andtechnicalstandards.5,toensurethatnetworkcanbeimplemented.6,stableconditionsforplanningandsupportingofYibincitytracktrafficconstructionandformationofrailtransitindustry,provideconditionsforthestart-upanddevelopmentofrailtransitinYibincity.1.7technicalcoursetechnologyistheproject'sresearchprogramandresearchideas.Technologyreflectsthevariousstagesintheprocess,logicalrelationsbetweenvariouslevels,research,techniquesandphases.Networkplanningprocessthewholeprocesscanbedividedintofourparts,namely,backgroundresearch,networkarchitectureresearch,planningandimplementationofresearchandprogramminginterfaces.Figure1.7-1Yibincityrailtransitnetworkplanningtechnologyroadmapplanninginterfaceismainlyresponsiblefornetworkplanninginterfacewithfollow-upplanningtasks.NetworkplanningUrbanplanningsysteminatransitionalposition,onlinenetworkplanningiscompleted,willbecarriedoutassoonaspossiblethefollowingplanningprojects:1,detailedcontrolofthelandofrapidrailtransitnetworkplanning;2,thepartitioningfornetworkplanning;3,jointplanningofrailtransportandurbantransportinotherways;Detailedtechnicalcoursesseebelow.Figure1.7-2Generaltechnologyroutefigure2ndchapterCitystatusanddevelopmentplanning2.1citybasicprofile2.1.1模拟考题3及答案一．回答下面各题：（每题4分，总计40分）1．在一定围压下，对处于小于、等于和大于临界孔隙比ecr密度条件下的砂土试样进行固结不排水三轴试验时，破坏时的膜嵌入对于量测的超静孔隙水压力有何影响？对其固结不排水强度有什么影响（无影响、偏大还是偏小）？解答：大于ecr膜嵌入会使量测的孔压偏小，使固结不排水强度偏大；小于ecr膜嵌入会使量测的负孔压绝对值偏小，使固结不排水强度偏小；等于时没有影响。；2．在,坐标和在平面坐标下画出下面几种三轴试验的应力路径（标出应力路径的方向）。其中：2131323()tg（1）CTC（常规三轴压缩试验）；（2）p＝常数，b=0.5＝常数，真三轴试验；（3）RTE（减压的三轴伸长试验）。3．与剑桥模型是否可以反映土由于剪应力引起的体积膨胀（剪胀），清华弹塑性模型是否可以反映土由于剪应力引起的体积膨胀？二者的区别是由于什么不同？可以，在于后者的屈服面椭圆的顶点在强度线内。4．在Dunca-Chang模型中，一般试验常数K与Kur哪一个大些？Kur大。5．有一处于临界孔隙比的砂土三轴排水试验的应力应变曲线如下图所示。试定性绘制出当eecr；eecr和e=ecr时三轴固结不排水试验的应力应变关系曲线示意图。③①②①②③在当今的科学发展飞速的新时代，越来越多的高科技开始运用于我们的学习、工作和生活当中。科技，已成为我们走向高质量生活的一座桥梁，一根绳梯。ofvision.3,build,fittinginwiththeurbanmasterplaninYibincityrapidrailtransitlongtermnetwork,aswellasthevisionofYibincity,andfuturedevelopmentofrailtransitnetwork.4,Yibincity,preliminaryrailtrafficlevelsservicelevels,systemmodel,andtechnicalstandards.5,toensurethatnetworkcanbeimplemented.6,stableconditionsforplanningandsupportingofYibincitytracktrafficconstructionandformationofrailtransitindustry,provideconditionsforthestart-upanddevelopmentofrailtransitinYibincity.1.7technicalcoursetechnologyistheproject'sresearchprogramandresearchideas.Technologyreflectsthevariousstagesintheprocess,logicalrelationsbetweenvariouslevels,research,techniquesandphases.Networkplanningprocessthewholeprocesscanbedividedintofourparts,namely,backgroundresearch,networkarchitectureresearch,planningandimplementationofresearchandprogramminginterfaces.Figure1.7-1Yibincityrailtransitnetworkplanningtechnologyroadmapplanninginterfaceismainlyresponsiblefornetworkplanninginterfacewithfollow-upplanningtasks.NetworkplanningUrbanplanningsysteminatransitionalposition,onlinenetworkplanningiscompleted,willbecarriedoutassoonaspossiblethefollowingplanningprojects:1,detailedcontrolofthelandofrapidrailtransitnetworkplanning;2,thepartitioningfornetworkplanning;3,jointplanningofrailtransportandurbantransportinotherways;Detailedtechnicalcoursesseebelow.Figure1.7-2Generaltechnologyroutefigure2ndchapterCitystatusanddevelopmentplanning2.1citybasicprofile2.1.16．粘性土坡用圆弧滑裂面的分析时，标出下列哪种情况的抗滑安全系数会减小？（1）由于降雨使土坡的上部含水量增加（未达到饱和及渗流），下部含水量基本未变；（2）将在附近施工的弃土堆在坡脚；（3）将在附近施工的弃土堆在坡顶；（4）由于降雨而使土坡整体的含水量接近于饱和；7．土的抗拉强度t是否等于c′tan′？t大于还是小于c′ctg′？小于。8．写出Fredlunde的非饱和土的强度理论公式；当体积含水率逐渐趋近于0时，是增加、不变还是减少？减少。()()faawcutguutg9．在基坑开挖降水时，可以在支护结构以外布置井点降水，也可以在基坑内布设集水井排水，从主动和被动土压力的角度，解释哪一种降水方式更有利于支护结构的稳定。外降水。10．发生曼德尔－克雷尔效应的机理是什么？以一个圆球的固结说明为什么太沙基-伦杜立克拟三维固结理论（扩散方程）不能描述这一效应？（1）由于土体表层首先固结（孔压消散）收缩，而内部消散慢，产生由外向内的额外约束压力，内部孔压在一个时期上升。（2）太沙基-伦杜立克拟三维固结理论假设1＋2＋3＝常数，亦即不能满足变形协调条件。不会描述这一效应。二．在地下水位以下进行扩底钻孔灌注桩钻孔施工时，可以采用泥浆护壁，同时使孔内的水位高于地下水位，以保持孔壁稳定。在一砂土地基中进行扩底桩钻孔施工，采用a/hc=1/3的扩孔，已知砂土内摩擦角＝37，砂土饱和容重sat＝20kN/m3;问需要多大的水力坡降i，才能使孔壁稳定？（10分）1－31ve=ecreecreecr在当今的科学发展飞速的新时代，越来越多的高科技开始运用于我们的学习、工作和生活当中。科技，已成为我们走向高质量生活的一座桥梁，一根绳梯。ofvision.3,build,fittinginwiththeurbanmasterplaninYibincityrapidrailtransitlongtermnetwork,aswellasthevisionofYibincity,andfuturedevelopmentofrailtransitnetwork.4,Yibincity,preliminaryrailtrafficlevelsservicelevels,systemmodel,andtechnicalstandards.5,toensurethatnetworkcanbeimplemented.6,stableconditionsforplanningandsupportingofYibincitytracktrafficconstructionandformationofrailtransitindustry,provideconditionsforthestart-upanddevelopmentofrailtransitinYibincity.1.7technicalcoursetechnologyistheproject'sresearchprogramandresearchideas.Technologyreflectsthevariousstagesintheprocess,logicalrelationsbetweenvariouslevels,research,techniquesandphases.Networkplanningprocessthewholeprocesscanbedi