CAJ | 학술논문

在不同类型结构面与岩桥组合的大型剪切试验和不同比例岩桥与夹泥层组合的中型剪切试验基础上,对比分析了试验结果与常用的面积加权法计算值之间的关系,探讨了试验过程中应力、应变的变化规律和特征.结果表明,大型剪切试验值一般小于峰值面积加权计算值,而中型剪切试验的摩擦系数接近或小于计算值,粘聚力的试验值大于计算值,且岩桥位置不同对试验结果有一定影响.就剪切变形破坏特征而言,常常是前块首先变形,当变形达到一定量值后中块开始变形,然后是后块变形,直至破坏.当岩桥所占面积比例较小且剪应力较低时,夹泥层变形多大于岩桥变形;剪应力高或岩桥所占面积比例较大,则二者变形相近.岩桥剪切破坏面的特征与岩桥所占比例有关,岩桥所占面积比例较小的试件,岩桥在夹泥附近被直接剪断;岩桥所占面积比例较大的试件,岩桥破坏面为锯齿状,与剪应力方向形成约45°夹角.
재불동류형결구면여암교조합적대형전절시험화불동비례암교여협니층조합적중형전절시험기출상,대비분석료시험결과여상용적면적가권법계산치지간적관계,탐토료시험과정중응력、응변적변화규률화특정.결과표명,대형전절시험치일반소우봉치면적가권계산치,이중형전절시험적마찰계수접근혹소우계산치,점취력적시험치대우계산치,차암교위치불동대시험결과유일정영향.취전절변형파배특정이언,상상시전괴수선변형,당변형체도일정량치후중괴개시변형,연후시후괴변형,직지파배.당암교소점면적비례교소차전응력교저시,협니층변형다대우암교변형;전응력고혹암교소점면적비례교대,칙이자변형상근.암교전절파배면적특정여암교소점비례유관,암교소점면적비례교소적시건,암교재협니부근피직접전단;암교소점면적비례교대적시건,암교파배면위거치상,여전응력방향형성약45°협각.
Based on data from the large scale shear tests on various combinations of structural planes with rock bridges and the medium scale shear tests on the combination of the rock bridges of various scales with muddy intercalations, the relationship between the test result and the calculated values from the conventional area weighted method is comparatively analyzed, and then the stress and strain changing law and characteristics during the test is discussed as well. The result shows that the value from the large scale shear test is generally less than the peak value from the weighted calculation, while the coefficient from the medium scale shear test is close to or less than that from the calculation and the testing value of the cohesions is larger than the calculated one. Furthermore, the location of the rock bridge has a certain influence on the testing result concerned.