工程地质学报2017，Vol.25Issue(3)：740-746,7.DOI:10.13544/j.cnki.jeg.2017.03.021
孔道弯曲条件下拉力型锚索锚固段受力特征模型试验研究
MODEL TEST RESEARCH ON THE FORCE MECHANISM OF TENSILE TYPE ANCHORAGE SEGMENT UNDER BOREHOLE DEVIATION
摘要
Abstract
Prestressed anchor cable technology as one of the most effective reinforcement technology has been widely used in railway,highway,water conservancy and hydropower,industrial and civil construction projects.Because of the influence of geological factors and technical factors in practical engineering construction of anchor cable and hole inclination and prone to bending problems,especially in the big tonnage-long hole deep anchor drilling the problem is particularly prominent.To obtain the force characteristic of anchor cable channel bending case,carried out under the condition of channel bend of the full-scale model test indoor,with a certain strength ofconcrete to simulate rock mass,and embed have certain radian of anchor cable components,through classifying tensioning prestressed anchor rope to measure under the condition of bending stress in the process of hole anchor rope around shear stress,axial stress and earth pressure strength.Test results show that in the case of bend channel,inner side and outside of the cable anchorage segment of shear stress distribution is not exactly same and the anchoring bend the inside of the shear stress is larger than the lateral shear stress values when tension load at the same level;axial force along the anchor length direction from large to small,until to O;soil pressure outside the grouting body on both sides of the same change rule in addition to the compression of the medial,lateral tension.关键词
足尺模型试验/拉力型预应力锚索/孔道弯曲/受力机理Key words
Model test/Prestressed anchor of tension type/Borehole deviation/Force mechanism分类
建筑与水利引用本文复制引用
于贵,朱宝龙,索玉文..孔道弯曲条件下拉力型锚索锚固段受力特征模型试验研究[J].工程地质学报,2017,25(3):740-746,7.基金项目
中国中铁股份有限公司重点项目(2014-重点-76),四川省科技支撑计划项目(2015GZ0206)资助. （2014-重点-76）
