| 全长黏结型预应力锚杆受力特性研究 |
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| 引用本文： | 文志杰,石永奎,崔增娣,王荣超.全长黏结型预应力锚杆受力特性研究[J].岩土力学,2010,31(Z1):177-181. |
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| 作者姓名： | 文志杰 石永奎 崔增娣 王荣超 |
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| 作者单位： | 山东科技大学矿山灾害预防与控制重点试验室,山东,青岛,266510 |
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| 基金项目： | 国家自然科学基金，山东省自然科学基金重点项目，山东省教育厅计划项目，《科技导报》博士生创新资助计划，国家973项目，山东科技大学研究生科技创新基金 |
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| 摘 要： | 全长黏结性预应力锚杆是一种结构和锚固机制新颖的全长锚固锚杆,已有的研究缺少锚杆孔壁形态对锚杆承载能力影响的分析。锚杆孔壁结构面起伏形态具有自仿射分形特征,详细分析了结构面抗剪强度、注液压力、张拉荷载与结构面分形维数D之间的关系,建立了各自计算与分析方法,得出施加的注液压力应小于锚固围岩体的抗压强度,以及随着维数D增加,张拉荷载亦相应增加,确定了锚固承载层与岩体结构面失稳判断的准则。探讨了全长黏结性预应力锚杆锚固性能。研究为其设计、试验和应用提供了一定的理论依据。
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| 关 键 词： | 全长黏结 维数 岩体结构面 注液压力 锚固机制 |
| 收稿时间： | 2010-05-04 |
Study of stress features of fully grouted prestressed anchors |
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| WEN Zhi-jie,SHI Yong-kui,CUI Zeng-di,WANG Rong-chao.Study of stress features of fully grouted prestressed anchors[J].Rock and Soil Mechanics,2010,31(Z1):177-181. |
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| Authors: | WEN Zhi-jie SHI Yong-kui CUI Zeng-di WANG Rong-chao |
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| Institution: | Key Laboratory of Mine Disaster Prevention and Control, Shandong University of Science and Technology, Qingdao, Shandong 266510, China |
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| Abstract: | Fully grouted prestressed anchor is a new kind of structural anchor. Few researches have been carried out on analysis of the influence of anchor shape of borehole wall on its carrying capacity. Rolling shape of anchor borehole wall structural plane has self-affine fractal feature; the relationship among structural plane shear strength, liquid injection pressure, tensile load and structural plane fractal dimension D is analysed in detail; the calculation and analysis methods are established respectively. Generally, the applied liquid injection pressure should be less than compression strength of anchoring surrounding rock mass, and tensile load would increase as fractal dimension D increases; the instability judgment criterion of anchoring bearing strata and rock structural plane is determined; the anchoring performance of fully grouted prestressed anchor is discussed. The analysis gives some help for the structure design, test and appliance to the anchor. |
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| Keywords: | fully grouted dimensions rock mass discontinuity filling pressure anchoring mechanism |
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