某拉力型锚杆变形特性现场试验研究  

Field Experimental Study on Deformation Characteristics of a Tensile Anchor

作　　者：乔丽平 李韵迪 杨超 QIAO Liping;LI Yundi;YANG Chao(Shenzhen Longgang Geological Exploration Bureau,Shenzhen Guangdong 518172,China;Shenzhen Comprehensive Geotechnical Engineering Investigation&Design Co.,Ltd.,Shenzhen Guangdong 518172,China;School of Civil Engineering and Architecture,Wuyi University,Jiangmen Guangdong 529020,China)

机构地区：[1]深圳市龙岗地质勘查局,广东深圳518172 [2]深圳市岩土综合勘察设计有限公司,广东深圳518172 [3]五邑大学土木建筑学院,广东江门529020

出　　处：《佳木斯大学学报（自然科学版）》2023年第4期117-120,共4页Journal of Jiamusi University：Natural Science Edition

基　　金：国家自然科学基金青年科学基金项目(41702323);广东省普通高校特色创新项目(自然科学类)(2020KTSCX152)。

摘　　要：以深圳坪山锚杆大型综合试验项目为背景,对较为常见的一次注浆型锚杆和二次注浆型锚杆在极限受力状态下的塑性位移、弹性位移的变化关系进行了分析,得出一些有益结论:(1)注浆锚杆破坏级荷载对应塑性位移与弹性位移比值范围约为2~6.5,曲线拐点位置荷载对应塑性位移与弹性位移比值范围约为0.5~1.0;(2)两种类型锚杆达到极限抗拔力时所对应塑性位移与弹性位移比值关系无明显区别;(3)二次注浆型锚杆塑性位移相对较小,变形以弹性位移为主。Based on the large-scale comprehensive test project of anchor in Pingshan,Shenzhen,the relationship between plastic displacement and elastic displacement of primary grouting anchor and secondary grouting anchor under ultimate stress state was analyzed in the paper,which was obtained some useful conclusions:(1)The ratio of plastic displacement to elastic displacement corresponding to the failure load of grouting bolt was about 2~6.5,the ratio of plastic displacement to elastic displacement corresponding to the load at the inflection point of the curve was about 0.5~1.0.(2)There was no obvious difference in the ratio of plastic displacement and elastic displacement when the two types of anchors reach the limit pull-out force.(3)The plastic displacement of secondary grouting anchor was relatively small,and the deformation was mainly elastic displacement.

关 键 词：注浆锚杆 现场试验 塑性位移 弹性位移 

分 类 号：TU443[建筑科学—岩土工程]