GFRP锚杆在抗浮工程中的研究现状与展望  

RESEARCH STATUS AND PROSPECT OF GFRP ANCHOR IN ANTI-FLOATING ENGINEERING

作　　者：李景文 乔建刚 付旭[2] 刘晓立[2] LI Jing-wen;QIAO Jian-gang;FU Xu;LIU Xiao-li(College of Civil and Transportation,Hebei University of Technology,Tianjing 300401,China;Department of Architectural Engineering,North China Institute of Aerospace Engineering,Langfang 065000,China)

机构地区：[1]河北工业大学土木与交通学院,天津300401 [2]北华航天工业学院建筑工程系,廊坊065000

出　　处：《玻璃钢／复合材料》2019年第1期99-105,共7页Fiber Reinforced Plastics/Composites

基　　金：国家重点研发计划重点专项(2017YFC0805404);河北省建设科技研究指导性计划项目(20182051);河北省高等学校科学技术研究项目(QN2017003)

摘　　要：GFRP抗浮锚杆是解决杆体腐蚀问题的有效途径之一,在地下结构抗浮工程中具有广阔的应用前景,首先分析了近年来GFRP抗浮锚杆的基本组成、工作特性及设计方法等方面的研究现状,其次详细介绍了GFRP抗浮锚杆内锚固和外锚固试验研究进展,总结和分析了GFRP抗浮锚杆的锚固机理特性:在拉力载荷作用下,内锚固段的破坏形式主要为杆体拔断和发生剪切位移,承载力与锚固段直径和长度呈正相关性,但存在临界锚固长度,轴力与剪应力分布范围在距孔口0～3 m范围之间;外锚固段的破坏形式为拔出、劈裂和滑移三种,锚具锚固可比直锚提供更高的承载力,弯曲锚固的弯曲半径和弯折长度对承载力有直接影响,外锚固段的载荷-滑移量关系曲线呈三阶段变化形式。最后,对GFRP抗浮锚杆在抗浮体系承载与变形特性研究、基于地下水位预测的稳定性计算和GFRP抗浮锚杆制作/设计/施工一体化技术方面的工作进行了展望。GFRP anti-floating anchor is one of the effective ways to solve the corrosion problem of the rod body and it has a broad application prospect in the anti-floating engineering of underground structures.In this paper,the basic composition,working characteristics and design method of GFRP anti-floating anchor in recent years are analyzed.The research progress of inner and external anchorage of GFRP anti-floating anchor is introduced in detail.The anchoring mechanism characteristics of GFRP anti-floating anchor are summarized and analyzed.Under the action of tension load,the main failure modes of the inner anchorage are the bar pull-out and shear displacement.The bearing capacity is positively correlated with the diameter and length of anchorage segment,but there is a critical anchorage length.The distribution range of axial force and shear stress is between 0 and 3 m from the aperture.The failure modes of external anchorage section are three kinds of pullout,splitting and sliding.Anchor anchorage provides higher bearing capacity than straight anchor,and the bending radius and bending length of flexural anchorage have a direct bearing on the bearing capacity.The load-slip relationship curve of the external anchorage section presents a three stage change form.Finally,the research work about the bearing and deformation characteristics of GFRP anti-floating anchor in anti-floating system,the stability calculation based on groundwater level prediction and GFRP anti-floating anchor fabrication/design/construction integration technology are prospected.

关 键 词：GFRP抗浮锚杆 抗浮工程 设计方法 承载特性试验 对拉试验 

分 类 号：TB332[一般工业技术—材料科学与工程]