黄土地层中预应力锚索锚固力试验与分析  

Experiment and analysis on anchorage force distributing characters of pre-stressed cables

作　　者：于远祥[1] 谷拴成[1] 吴璋[2] 王毅[2] 

机构地区：[1]西安科技大学建筑与土木工程学院,陕西西安710054 [2]煤炭科学研究总院西安研究院钻探技术研究所,陕西西安710077

出　　处：《解放军理工大学学报（自然科学版）》2010年第5期522-527,共6页Journal of PLA University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(40802068)

摘　　要：在现场试验的基础上,通过系统分析试验数据,得出预应力锚索锚固力在黄土地层特定地质条件下的基本分布规律,为科学确定其锚固段长度提供了试验依据;通过实测和修正参数,推导出2种简单实用的锚固力计算公式,并将其理论解与实测值进行了对比分析,进一步验证了预应力锚索剪应力非均匀分布的实际状况,并指出在锚固长度小于工程临界锚固长度时剪应力均匀分布理论能较准确地计算锚索锚固力,为深入开展锚索支护的理论分析与工程设计提供了参考,在理论和工程实践上都是一种有益的探索。Based on the scene test,the fundamental distribution rule under loess stratum specific geological condition of the anchor force was obtained through systematical analysis of the experimental data.It provided an experimental basis for the scientific determination of anchor segment size. At the same time,two simple and practical formulas for calculating the anchoring force were deduced by making use of actual and revised parameters.Comparing the theoretical solution with the measured data,it is validated that the shear stress of the pre-stressed cable is not uniformly distributed.It is pointed out that when the length of the anchor is less than the critical length of the project anchor,the uniform distribution theory can calculate the cable anchoring force relatively accurately. The exploration provides a reference to in-depth theoretical analysis and engineering design,which is useful in theory and engineering practice.

关 键 词：黄土地层 预应力锚索 拉拔试验 锚固力 有效锚固长度 

分 类 号：TU443[建筑科学—岩土工程]