CAJ | 학술논문

为研究节理裂隙岩体中节理位置和尺寸对岩体综合抗剪强度的影响，以水泥砂浆作为模型材料，通过在试件的不同位置预制相同长度的节理裂隙和相同位置预制不同长度的节理裂隙，进行不同法向压力下3种具有不同起伏角的节理面剪切试验。试验结果表明：当节理位置和长度一定时其抗剪强度随法向压力增加而增加；对于同一节理裂隙，当其位于试件中间时抗剪强度和黏聚力最小，位于试件后端时抗剪强度和黏聚力最大，位于试件前端时介于两者之间；内摩擦角随节理位置的变化规律不明显；当节理裂隙位置固定时，节理裂隙越长，抗剪强度和黏聚力越低，且抗剪强度随节理长度的增加呈近乎线性的减小。节理位置和尺寸对综合抗剪强度的影响可能由于节理、岩桥的强度参数及岩桥内部损伤劣化程度共同作用所致，现场节理岩体的抗剪强度取值应考虑节理的位置影响。
위연구절리렬극암체중절리위치화척촌대암체종합항전강도적영향，이수니사장작위모형재료，통과재시건적불동위치예제상동장도적절리렬극화상동위치예제불동장도적절리렬극，진행불동법향압력하3충구유불동기복각적절리면전절시험。시험결과표명：당절리위치화장도일정시기항전강도수법향압력증가이증가；대우동일절리렬극，당기위우시건중간시항전강도화점취력최소，위우시건후단시항전강도화점취력최대，위우시건전단시개우량자지간；내마찰각수절리위치적변화규률불명현；당절리렬극위치고정시，절리렬극월장，항전강도화점취력월저，차항전강도수절리장도적증가정근호선성적감소。절리위치화척촌대종합항전강도적영향가능유우절리、암교적강도삼수급암교내부손상열화정도공동작용소치，현장절리암체적항전강도취치응고필절리적위치영향。
In order to study the effects of joint location and size on comprehensive shear strength of rock mass, cement mortar is selected as model material and specimens were prepared with prefabricated joints of the same size at different locations and with joints of various sizes at the same location,and shear tests were conducted under various normal stress of 3 different joints undulating angles. Experimental results indicate that shear strength increases with the increase of normal stress when the location and size of the joint are definite,and when the joint is located in the middle of the specimen,the shear strength and cohesion are the lowest,while largest when the joint is located at the back and fall in between them when located in the front of the specimen,but change law of the internal friction angle with different joint location is not obvious. When the joint location is definite,the longer the joint the lower the shear strength and cohesion. Moreover,shear strength of joint decreases linearly with increase of joint length. Effects of joint location and size on comprehensive shear strength of rock mass may be decided by both the strength parameters of joint and rock bridge and damage degradation of rock bridge. Position of joint should be considered when shear strength of in-situ jointed rock mass is estimated.