扩大头压力型锚索的现场试验研究  

Field Test on Pressure-type Anchor with Enlarged-end

作　　者：刘国楠[1] 温科伟 李中国[1] 胡荣华[1] 

机构地区：[1]中国铁道科学研究院深圳研究设计院,广东深圳518034 [2]深圳市岩土工程有限公司,广东深圳518034

出　　处：《西北地震学报》2011年第B08期303-307,共5页Northwestern Seismological Journal

基　　金：深圳市国土资源与房产管理局国土基金项目(20080130002A)

摘　　要：在土质边坡进行了拉力型锚索、扩大头压力型锚索和分段扩大头压力型锚索的现场试验。对所试验锚索的极限抗拔力和变形特性进行了比较分析;对压力型锚索注浆体压应变的分布,扩大头前端土体承载力对抗拔力的贡献等进行了分析。取得的试验结果和有关分析结论对扩大头压力型锚索的设计与施工有重要的指导意义。The field tests on pull-type anchor,pressure-type anchor with enlarged-end and pressure-type anchor with subsection enlarged-end in soil slope are done.The ultimate pullout capacity and deformation characteristic of the pull-type anchor are compared with the pressure-type anchor.The compressive strain distribution of cement-based grout in the pressure-type anchor and the contribution for pullout capacity＇s from the soil bearing capacity at front of the enlarged-end are analyzed.The results have significant practical value to design and construction of pressure-type anchor with enlarged-end.

关 键 词：压力型锚索 扩大头 土体承载力 土质边坡 现场试验 

分 类 号：U418.52[交通运输工程—道路与铁道工程]