摘要
研究压力分散型锚索在不同强度岩体中受力变形特征以及破坏模式,对分析此类锚索锚固机理和效应有着重要意义。根据广贺高速公路边坡加固工程,采用相似原理和应变测试方法,对3种不同强度岩体中压力分散型锚索加固效应进行了足尺模型室内对比试验,给出了注浆体轴向应变分布特点以及注浆体与孔壁剪应力分布规律,分析了锚索破坏特点和形式、注浆体在承载体附近的压应力集中现象等。通过对剪应力校核表明,试验采用的剪应变测试技术及试验方案是可靠的。
It is of significance that researching deformation behaviour and pattern of destruction of pressure-dispersive prestressed anchorage cable stressed in various kinds of rock for anchoring mechanism and effect of those cables.Based on the reforcing works of Guang-He highway slope engineering,with similitude principle and method of testing strain adopted,we have carried out full size model indoor test to make a comparison of pressure-dispersive anchorage cable effected in 3 kind of rock having different intensity in this paper.The distribution characteristics of axial strain of grouting body as well as law of distribution of shear stress between grouting body and wall of hole are deduced.And then we analyze features and patterns of cable damaged,and phenomenon of compression stress concentration of grouting body around bearing structure and so on.Through check of shear stress by theoretical calculation,it is successful and credible of the test having applied measuring and testing technique and programme of shear stress.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2010年第3期33-37,共5页
Journal of Wuhan University of Technology
基金
国家自然科学基金(50874085
50774058)
广东省科技计划项目(63123)
关键词
压力分散型锚索
受力特点
足尺模型试验
锚固效应
pressure-dispersive prestressed anchorage cable
stress feature
full size indoor test
anchorage effect
