软弱结构面劣化锚固边坡静载演化规律研究  

Static Load Evolution Law of Soft Structural Surface Degradation Anchored Slope

作　　者：赵江 ZHAO Jiang(Central Branch of Shanxi Transportation Holdings Group Co.,Ltd.,Taiyuan,Shanxi 030006,China)

机构地区：[1]山西交通控股集团有限公司中部高速公路分公司,山西太原030006

出　　处：《山西交通科技》2024年第3期56-59,64,共5页Shanxi Science & Technology of Transportation

摘　　要：为了探讨含贯通软弱结构面锚固边坡在坡顶局部静载作用下的力学响应特性,在验证模型试验基础上通过数值模拟手段系统研究了锚固边坡的变形模式及应力应变特征。研究结果表明,随着附加荷载的增大,数值模拟与试验的框架梁特征点变形一致,坡面破坏形式呈鼓肚状,实际防护应注重坡体中上部防护,加强坡腰治理。静载作用下软弱结构面改变坡体的位移及应力分布状态,在结构面内部形成剪切-拉伸破坏,并沿其形成一条潜在滑移带,最终形成楔形滑动区。中上排锚索响应明显,软弱结构面异化轴力分布机制,锚固工程施工时应考虑渐进式设计,增强中上排锚索强度和预应力幅值。研究成果可为山区公路防护提供一定的参考价值。To explore the mechanical response characteristics of anchored slopes with the penetrating soft structural surface under localized static loads at the slope top,this paper systematically investigated the deformation pattern and stress-strain characteristics of anchored slopes by numerical simulation means based on the validation model test.The results showed that with the increase of the additional load,the variation of the characteristic point deformation of frame beams in the numerical simulation and the test was consistent,the failure of the slope was in the form of a bulging belly,so the actual protection should focus on the middle and upper slope and the management of middle part of the slope should be strengthened.Under static loads,the soft structural surface changed the slope displacement and stress distribution,which formed the shear-tensile failure inside the structural surface,along which a potential slide zone was formed and ended up with a wedge-shaped sliding zone.The response of the middle and upper rows of anchor cables was obvious,and the soft structural surface alienated the axial force distribution mechanism.The progressive design should be considered during the construction of the anchoring project to enhance the strength and prestress magnitude of the middle and upper rows of anchor cables.The study results can provide certain references for mountainous highway protection.

关 键 词：软弱结构面 锚固边坡 静载 破坏模式 数值模拟 

分 类 号：U416.14[交通运输工程—道路与铁道工程]