摘要
为研究隧道断层破碎带注浆加固体中泥质含量对其加固效果的影响,根据泥质体积与试件体积占比制备不同泥质含量的试件,通过单轴压缩试验分析其力学性质,利用高速摄像技术记录压缩过程中试件裂纹演化规律,并从裂纹扩展角度探讨泥质体积含量对加固体强度的影响原因。研究表明:(1)加固体的强度并非是泥质含量越少就越高,单轴抗压强度最大值为泥质体积占试件体积1/4时。(2)加固体试件破坏过程可分为2个阶段,①无贯穿骨料产生阶段,此时裂纹扩展路径和总长度与抗压强度呈正相关;②贯穿裂纹产生阶段,贯穿骨料裂纹总长度与抗压强度呈正相关,与裂纹总长度相关性很小。
To study the influence of mud content on the reinforcement effect of grouting in the fractured zone of tunnel faults,specimens with different mud contents are prepared according to the volume proportion of mud.Their mechanical properties through uniaxial compression tests are analyzed,and the crack evolution law of the specimens during the compression process is recorded by high-speed camera technology.From the perspective of crack propagation,the influence of clay content on the strength of reinforced solids is explored.Research shows that:(1)The strength of adding solid does not necessarily increase with less mud content,and the maxi-mum uniaxial compressive strength is when the mud volume accounts for 1/4 of the test block.(2)The failure process of solid specimens can be divided into two stages.①At the stage of non penetrating aggregate genera-tion,the crack propagation path and total length are positively correlated with compressive strength.②During the stage of through crack generation,the total length of through aggregate cracks is positively correlated with compressive strength,while the correlation between the total length of cracks is very small.
作者
戎密仁
庞银萍
马骁
耿东阳
冯超
RONG Miren;PANG Yinping;MA Xiao;GENG Dongyang;FENG Chao(School of Urban Geology and Engineering,Hebei GEO University,Shijiazhuang 050031,China;Hebei Technology Innovation Center for Intelligent Development and Control of Underground Built Environment,Shijiazhuang 050031,China;Shijiazhuang University of Applied Technology,Shijiazhuang 050087,China;School of International Education,Dalian Jiao Tong University,Dalian 116028,China)
出处
《电力学报》
2024年第3期264-271,共8页
Journal of Electric Power
基金
河北省高等学校科学技术研究项目(QN2023220)
河北省建设科技研究指导性计划项目(2022-2090)。
关键词
断层破碎带
注浆加固体
力学性能
变化规律
泥质含量
fault fracture zone
grouting with solid
mechanical properties
variation law
mud content
