楠竹加筋复合锚杆管材力学性能试验研究  

EXPERIMENTAL RESEARCH ON MECHANICAL PROPERTIES OF PIPE MATERIAL FOR BAMBOO-STEEL COMPOSITE ANCHOR BOLT

作　　者：王晓东[1] 张虎元[1] 吕擎峰[1] 张艳军[1] 严耿升[1] 

机构地区：[1]兰州大学西部灾害与环境力学教育部重点实验室,甘肃兰州730000

出　　处：《岩石力学与工程学报》2009年第A01期2941-2946,共6页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家科技支撑计划课题资助项目(2006BAK30B02)

摘　　要：楠竹加筋复合锚杆是一种应用于土遗址加固工程的新型锚杆,为了解锚杆的工作机制,对其管材楠竹进行力学性能试验,研究竹材的抗压、抗拉、抗弯强度及其影响因素。结果表明:3a生楠竹块顺纹抗压强度达119MPa,比5a生楠竹大;同一根楠竹,取自基部和中部的竹块试样,顺纹抗压强度相当,均小于顶部试样;竹块顺纹、横纹、径向抗压强度分别为98,37和65MPa,强度差异是由加压方向和竹纤维生长方向之间的关系决定的;竹材的顺纹抗压、抗拉和抗弯强度均与竹材的含水率有关,含水率增大强度降低,当含水率达到一定值时,抗压强度趋于稳定;径高比为1∶1和1∶2的竹筒抗压强度试验以及竹条抗拉强度试验结果表明,竹节对竹筒和竹条的强度有一定的削弱作用。Compressive, tensile and bending strength tests were conducted on bamboo specimens in laboratory to understand the working mechanism of bamboo-steel cable composite（BSCC） anchor, a newly invented anchor for reinforcing earthen archaeological sites. Test results show that the longitudinal compressive strength of the 3 year-old bamboo is up to 119 MPa, which is higher than that of 5 year-old one. With respect to the height positions of the same bamboo, the longitudinal strength is almost the same for the specimens from the middle and bottom parts, but less than that from the top part. The relationship between compressive direction and arrangement of bamboo fiber is highly responsible for the variation of compressive strength of bamboo, namely, the longitudinal, tangential and radial strengths are 98, 37 and 65 MPa respectively. The compressive, tensile and bending strengths of bamboo specimens are found to decrease gradually with the increase of moisture content except that the compressive strength becomes stable when the moisture content is greater than a constant. Compressive tests on bamboo pipes in two different diameter-to-height ratios, 1： 1 and 1： 2, and tensile tests on bamboo splints, illustrate that the existence of bamboo knots results to a little decrease in bamboo pipe and splint strengths.

关 键 词：边坡工程 复合锚杆 楠竹 力学性质 土遗址 

分 类 号：P642[天文地球—工程地质学]