桩底锚杆技术及其在基桩竖向承载力测试中的应用  

Application of Pile Tip Bolt Technology in Testing the Vertical Bearing Capacity of Pile Shaft

作　　者：邹新军[1] 赵明华[1] 张百全 

机构地区：[1]湖南大学岩土工程研究所,湖南长沙410082 [2]长沙市建设工程质量监督站,湖南长沙410011

出　　处：《中南公路工程》2005年第4期46-49,共4页Central South Highway Engineering

基　　金：湖南省建设厅科技计划项目(200403)

摘　　要：利用岩土锚固技术,在桩底设置锚杆,采用所研制的传力装置将锚杆与桩顶反力梁相连,使基桩竖向载荷试验过程中千斤顶的压力由反力梁传至桩底锚杆,促进其抗拔承载力的发挥,从而提供所需反力即实现反力的自锚固。工程应用结果表明,与传统载荷试验法相比,基于桩底锚杆技术的桩身竖向承载力自锚式测试法可显著减小试验成本、缩短试验周期,且结果较可靠,具有一定的理论研究意义和应用推广价值。ed under the pile Based on the available tip and connected with devices. Then, during the loading test, bolts and causes the pull-out capacity to anchoring technology in geotechnical engineering, bolts are construct the reaction beam over the pile top through the developed load transfer the needed by the jacks is transferred from the reaction beam to the exert. Consequently, bolts under the pile tip supplies the required by the reacting load. Result of engineering application shows that, the developed new selfanchorage method in testing the vertical bearing capacity of pile shaft have quite a few advantages over the traditional loading test methods such as lower test cost, shorter test cycle and reliable test result. So, the proposed method in this pa per deserves in-depth theoretical research and has potential value of popularized application.

关 键 词：桩基础 竖向承载力 锚杆 载荷试验 

分 类 号：TU473.1[建筑科学—结构工程]