桩底锚杆技术及其在基桩竖向承载力测试中的应用

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白锚固。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白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。

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

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.