交通科技
交通科技
교통과기
TRANSPORTATION SCIENCE & TECHNOLOGY
2015年
1期
95-98
,共4页
充填物%断续裂隙%扩展行为%张拉裂纹%起裂参数
充填物%斷續裂隙%擴展行為%張拉裂紋%起裂參數
충전물%단속렬극%확전행위%장랍렬문%기렬삼수
fillings%rock crack%propagation behavior%tensile crack%initiation parameters
目前岩体断续裂隙扩展行为的研究主要集中在闭合型或张开型裂隙上，缺少对充填型裂隙扩展行为的研究。实践表明，实际工程中岩体裂隙内往往存在充填物，且充填物对裂隙扩展有一定程度的影响。文中在滑动裂隙模型的基础上，针对充填型裂隙的特点，考虑裂隙内的传压系数和传剪系数，并根据节理裂隙法向变形的双曲线模型，推导了充填型断续裂隙的法向刚度，最终结合最大拉应力准则提出了压剪作用下充填型断续裂隙张拉裂纹起裂参数的计算方法。
目前巖體斷續裂隙擴展行為的研究主要集中在閉閤型或張開型裂隙上，缺少對充填型裂隙擴展行為的研究。實踐錶明，實際工程中巖體裂隙內往往存在充填物，且充填物對裂隙擴展有一定程度的影響。文中在滑動裂隙模型的基礎上，針對充填型裂隙的特點，攷慮裂隙內的傳壓繫數和傳剪繫數，併根據節理裂隙法嚮變形的雙麯線模型，推導瞭充填型斷續裂隙的法嚮剛度，最終結閤最大拉應力準則提齣瞭壓剪作用下充填型斷續裂隙張拉裂紋起裂參數的計算方法。
목전암체단속렬극확전행위적연구주요집중재폐합형혹장개형렬극상，결소대충전형렬극확전행위적연구。실천표명，실제공정중암체렬극내왕왕존재충전물，차충전물대렬극확전유일정정도적영향。문중재활동렬극모형적기출상，침대충전형렬극적특점，고필렬극내적전압계수화전전계수，병근거절리렬극법향변형적쌍곡선모형，추도료충전형단속렬극적법향강도，최종결합최대랍응력준칙제출료압전작용하충전형단속렬극장랍렬문기렬삼수적계산방법。
Current research on the propagation behavior of rock cracks is mostly focused on open cracks and closed cracks,and it is rare to study on the filled cracks.While natural rock cracks are mostly found with filling materials and the fillings were also found to have strong influence on rock failure behavior in engineering practice.In this paper,the compression transferring coefficient and shearing transferring coefficient are taken into account in filled crack,which the normal stiffness is de-rivated based on the hyperbolic constitutive model of rock joint.Finally,the parameters of tensile crack initiation are computed by the crack sliding model and maximum tensile stress criterion.
