CAJ | 학술논문

震裂斜坡是强震作用下形成的一类分布范围广、震裂变形严重、潜在危害大的次生地质灾害,为了深入系统地分析其震裂机理及变形破坏机制模式,本文结合"5.12"汶川大地震造成的震裂斜坡及其破坏现象的详细调查,在对强震中的地震波效应深入分析的基础上,以双面斜坡为例,首先对震裂变形的力学机理进行了系统分析.认为强震中的体波效应将导致斜坡体处于量值和方向不断变化的拉-剪应力和反压应力的交替作用之下,其形成的拉-剪破裂效应和潜在的楔劈效应是斜坡震裂变形的重要力学因素之一.同时,面波效应将导致坡体表面处于鼓胀拉力和扭力的作用之下,是坡体表部整体震裂破碎甚至破坏的另一重要力学因素.二者共同作用均使坡体应力场处于不断的动态变化过程中,坡体(面)震裂变形甚至破坏更为严重.在此基础上,对强震中斜坡变形破坏的机制模式进行了归纳,认为主要有四种表现形式,即旋转-拉裂型、旋转-剪滑型、鼓胀-拉裂型和滑移-拉裂型.研究成果为震裂斜坡稳定性分析以及灾后重建和防灾减灾提供了有力参考.化的拉-剪应力和反压应力的交替作用之下,其形成的拉-剪破裂效应和潜在的楔劈效应是斜坡震裂变形的重要力学因素之一.同时,面波效应将导致坡体表面处于鼓胀拉力和扭力的作用之,是坡体表部整体震裂破碎甚至破坏的另一重要力学因素.二者共同作用均使坡体应力场处于不断的动态变化过程中,坡体(面)震裂变形甚至破坏更为严重.在此基础上,对强震中斜坡变形破坏的机制模式进行了归纳,认为主要有四种表现形式,即旋转-拉裂型、旋转-剪滑型、鼓胀-拉裂型和滑移-拉裂型.研究成果为震裂斜坡稳定性分析以及灾后重建和防灾减灾提供了有力参考.
진렬사파시강진작용하형성적일류분포범위엄、진렬변형엄중、잠재위해대적차생지질재해,위료심입계통지분석기진렬궤리급변형파배궤제모식,본문결합"5.12"문천대지진조성적진렬사파급기파배현상적상세조사,재대강진중적지진파효응심입분석적기출상,이쌍면사파위례,수선대진렬변형적역학궤리진행료계통분석.인위강진중적체파효응장도치사파체처우량치화방향불단변화적랍-전응력화반압응력적교체작용지하,기형성적랍-전파렬효응화잠재적설벽효응시사파진렬변형적중요역학인소지일.동시,면파효응장도치파체표면처우고창랍력화뉴력적작용지하,시파체표부정체진렬파쇄심지파배적령일중요역학인소.이자공동작용균사파체응력장처우불단적동태변화과정중,파체(면)진렬변형심지파배경위엄중.재차기출상,대강진중사파변형파배적궤제모식진행료귀납,인위주요유사충표현형식,즉선전-랍렬형、선전-전활형、고창-랍렬형화활이-랍렬형.연구성과위진렬사파은정성분석이급재후중건화방재감재제공료유력삼고.화적랍-전응력화반압응력적교체작용지하,기형성적랍-전파렬효응화잠재적설벽효응시사파진렬변형적중요역학인소지일.동시,면파효응장도치파체표면처우고창랍력화뉴력적작용지,시파체표부정체진렬파쇄심지파배적령일중요역학인소.이자공동작용균사파체응력장처우불단적동태변화과정중,파체(면)진렬변형심지파배경위엄중.재차기출상,대강진중사파변형파배적궤제모식진행료귀납,인위주요유사충표현형식,즉선전-랍렬형、선전-전활형、고창-랍렬형화활이-랍렬형.연구성과위진렬사파은정성분석이급재후중건화방재감재제공료유력삼고.
The shatter slope is a type of secondary geological hazards under the action of strong earthquake. Its distribution is wide, its shatter deformation is serious, and its potential hazard is great. In order to thorough and systematically analyze the shatter mechanism and the deformation failure mechanism models, this paper, combined with the detail investigation to the shatter deformation and destroy phenomenon caused by "5. 12" Wenchuan big earthquake, and under the condition of fully analyzed the earthquake wave effects, preliminary and systematically analyzed the mechanism of double-side slope shatter deformation. It considers that the action of body waves make slope under the alternative action of pulling-shearing strength and counter pressure strength, which quantity value and orientation change continuously. This will form pulling-shearing rending effect and potential wedge split rending effect, which is one important factors of shatter formation. At the same time, the surface wave will make the slope surfaces suffer the action of ballooning pulling force and torsion. This is still the significant reason of shatter deformation. All these will lead to the stress field of slope body under the process of continuous dynamic variation, and will make the shatter deformation become more serious. On the basis of above, the paper still analyzed and concluded the deformation failure mechanism models of slopes in the process of strong earthquake. It thinks that the deformation failure mechanism models have four typical representation forms, which are rotating and fracturing model, rotating and shearing-sliding model, ballooning and fracturing model, and sliding and fracturing model. The study results will provide vigorous reference for analysis of shatter slopes stability and reconstruction after earthquake and hazard resistant and reduction.