预应力锚杆锚固段长度的研究.pdfVIP

第24 卷 第6 期 岩石力学与工程学报 Vol.24 No.6 2005 年3 月 Chinese Journal of Rock Mechanics and Engineering March ，2005 预应力锚杆锚固段长度的研究 1 2 2 张友葩 ，高永涛 ，吴顺川 (1. 泛华建设集团 市场部，北京 100055 ；2. 北京科技大学 土木与环境工程学院，北京 100083) 摘要：通过对锚杆承载机理的分析，根据预应力锚杆在同一拉拔力作用下锚固段的切向位移越小锚杆的承载性能 越好这一特性，给出了杆体切向位移的计算方法。根据工程实际，利用预应力锚杆在拉拔过程中所测试到的切 向位移，对杆体的锚固段长度进行了比较系统的分析，并由此得出了在180 kN 预应力值下锚杆的最佳锚固段长 度。 关键词：岩石力学；预应力锚杆；锚固段长度；切向位移；拉拔力 中图分类号：TD 353 文献标识码：A 文章编号：1000 –6915(2005)06 –0980 –07 STUDY ON BONDING LENGTH OF PRESTRESS ANCHOR BAR 1 2 2 ZHANG You-pa ，GAO Yong-tao ，WU Shun-chuan (1. Marketing Department ，Pan-China Construction Group ，Beijing 100055，China； 2. School of Civil and Environmental Engineering ，University of Science and Technology Beijing，Beijing 100083，China) Abstract ：Through the analysis of loading characteristics and with the consideration of loading mechanism of smaller shear displacement with better loading properties of prestressed anchor bar，the analytical method of shear displacement was discussed. By using a practical engineering case of unstable retaining wall，which is located in Tai′an city，Shandong province，the practice bonding length of prestressed anchor bar was analyzed systemically with some in-situ pull-loading displacement data. Finally ，the optimum bonding length of prestressed anchor bar under the 180 kN prestressed load was achieved. Key words ：rock mechanics ；prestressed anchor bar ；bonding length ；shear displacement；pull-loading 状况进行了比较系统的分析研究，同时 Fujita 和 1 引 言