CAJ | 학술논문

通过室内试验与细观颗粒流模拟相结合的方法，研究了锚固段应力分布演化规律及其影响因素。锚固体的拉拔破坏过程可以分为3个阶段：黏弹阶段、黏脱阶段和破坏阶段。在黏弹阶段，剪应力呈先增后减的分布形式，峰值点靠近拉拔端孔口处；在黏脱阶段，拉拔端处的界面黏结首先失效，并向内部扩展，在此阶段，剪应力的峰值点随之向锚固段内部移动。锚杆和锚固剂弹性模量影响锚杆轴力和界面剪应力的分布形式，锚杆弹性模量越大，锚固剂弹性模量越小，剪应力在锚固段拉拔端的集中程度越小。
통과실내시험여세관과립류모의상결합적방법，연구료묘고단응력분포연화규률급기영향인소。묘고체적랍발파배과정가이분위3개계단：점탄계단、점탈계단화파배계단。재점탄계단，전응력정선증후감적분포형식，봉치점고근랍발단공구처；재점탈계단，랍발단처적계면점결수선실효，병향내부확전，재차계단，전응력적봉치점수지향묘고단내부이동。묘간화묘고제탄성모량영향묘간축력화계면전응력적분포형식，묘간탄성모량월대，묘고제탄성모량월소，전응력재묘고단랍발단적집중정도월소。
With laboratory tests and particle flow simulation, stress distribution evolution law and in-fluencing factors along anchorage segment are studied. The failure process of anchor system can be di-vided into three stages:viscoelastic stage, de-viscosity stage and failure stage. In the viscoelastic stage, the shear stress first increases and then decreases along the anchorage segment, and the peak point is close to the pull end. In the de-viscosity stage, the bond at the pull end first fails, and then expands to the internal layer. The shear stress peak point also moves inward. Elastic modulus of anchor and anchor agent influences the stress distribution. With the increase of anchor’s modulus and decrease of anchor agent’s modulus, the intensity of stress at pull end weakens.