CAJ | 학술논문

“5·12”汶川地震过程中，强烈的地震动效应，导致二古溪1#隧道变形，并出现裂缝等病害。在余震、降水和水库蓄水等诱发因素下，坡体蠕变速率逐渐加剧，坡体出现大变形迹象，从而对坡脚内部二古溪1#隧道造成了强烈的挤压破坏。基于三维激光扫描技术，获取隧道点云影像特征，得到隧道变形量值，测量结果显示隧道最大挤压变形量可达1.08 m。根据变形情况，借助ANSYS有限元计算软件，采用荷载-结构法将衬砌结构离散化，用弹簧来代替围岩的约束作用，从而对结构荷载进行反分析研究。多次重复迭代计算得到坡体深部对衬砌结构荷载大小为：F=16807～23737 kN。同时，依据荷载作用的大小，提出有效的隧道处理方案。
“5·12”문천지진과정중，강렬적지진동효응，도치이고계1#수도변형，병출현렬봉등병해。재여진、강수화수고축수등유발인소하，파체연변속솔축점가극，파체출현대변형적상，종이대파각내부이고계1#수도조성료강렬적제압파배。기우삼유격광소묘기술，획취수도점운영상특정，득도수도변형량치，측량결과현시수도최대제압변형량가체1.08 m。근거변형정황，차조ANSYS유한원계산연건，채용하재-결구법장츤체결구리산화，용탄황래대체위암적약속작용，종이대결구하재진행반분석연구。다차중복질대계산득도파체심부대츤체결구하재대소위：F=16807～23737 kN。동시，의거하재작용적대소，제출유효적수도처리방안。
During“5·12”Wenchuan earthquake,the strong ground motion caused Erguxi tunnel #1 to deform and crack. Under the influences of the aftershocks,the precipitation and the impounding of reservoir etc,the creep rate of the slope gradually increases resulting large deformation of slope and squeezing the Erguxi tunnel #1 to be damaged severely. 3D laser scanning technology was used to obtain the surface image of the tunnels and the tunnel deformation was calculated with the acquired optical results. The maximum extrusion was found to be 1.08 m. The finite element software ANSYS was used to back analyze the structural loads. The element discretization of the lining structure was achieved through the load-structure discrete method with a spring to represent the constraint of rock. Repeated iterations were carried out to get the structural load of the slope on the deep lining to be around:F=16 807-23 737 kN. A suitable treatment program for the tunnel was put forward based on the value of the load on the structure.