CAJ | 학술논문

构建一定尺寸粘土质边坡物理模型，在该模型某一位置设置砂土层作为预设滑动面，分别在干土和饱水条件下从坡脚进行逐步开挖，观察其破坏现象；采用直线滑动面的极限平衡法进行整个开挖过程的稳定性系数的计算。试验结果表明：两种条件下边坡开挖后破坏现象有明显差异，干土边坡只呈现散状崩塌，并未发生整体滑动；饱水边坡呈现块状破裂，并最终沿预设砂层整体滑移。稳定性系数的计算结果表明：饱水边坡的稳定性明显差于干土边坡。整个开挖过程中，干土边坡的安全系数从1.70下降到1.58；饱水边坡的安全系数从1.11下降到1.04。
구건일정척촌점토질변파물리모형，재해모형모일위치설치사토층작위예설활동면，분별재간토화포수조건하종파각진행축보개알，관찰기파배현상；채용직선활동면적겁한평형법진행정개개알과정적은정성계수적계산。시험결과표명：량충조건하변파개알후파배현상유명현차이，간토변파지정현산상붕탑，병미발생정체활동；포수변파정현괴상파렬，병최종연예설사층정체활이。은정성계수적계산결과표명：포수변파적은정성명현차우간토변파。정개개알과정중，간토변파적안전계수종1.70하강도1.58；포수변파적안전계수종1.11하강도1.04。
In this paper, a certain size clay slope model was constructed and a sand layer was set as the default sliding surface in a position of the model. Excavating from the bottom of slope step by step respectively in the dry and wet conditions , the failure phenomenon of these slopes was observed and recorded. The slope stability coefficient was calculated by using the limit equilibrium method of linear sliding surface during the whole excavation process. The test results show that the damage phenomenon has obvious difference between the two conditions of slope excavation. The dry soil slope was stable during the whole excavation process while the saturated slope finally slid along the sand layer. The calculation results of slope stability coefficient showed that the stability of saturated soil slope was significantly worse than dry soil slope. The stability coefficient of dry soil slope decreased from 1.70 to 1.58 during the whole process of excavation while the saturated slope decreases from 1.11 to 1.04.