桩端持力层起伏较大时提高单桩竖向抗拔承载力的方法分析  

Analysis on the Method of Increasing Vertical Uplift Bearing Capacity of Single Pile When the Bearing Layer of Ppile End Fluctuates Greatly

作　　者：方文全 王伟 胡纬中 FANG Wen-quan;WANG Wei;HU Wei-zhong(China Construction First Engineering Group South China Construction Co.Ltd.,Shenzhen 518040,China)

机构地区：[1]中建一局集团华南建设有限公司,广东深圳518040

出　　处：《工程建设与设计》2024年第20期7-9,共3页Construction & Design for Engineering

摘　　要：对某工程实例工序优化前后2次试验桩的单桩承载力特征值进行了研究,验证了当承载力检测值不满足设计要求时,通过增加后注浆及刷壁器“破壁”等工序,能够有效提高在桩端持力层起伏较大的情况下的单桩竖向抗拔承载力。This article studied the bearing capacity characteristic value of two test piles before and after process optimization of a project example,and it is verified that when the bearing capacity test value does not meet the design requirements,the vertical uplift bearing capacity of a single pile can be effectively improved under the condition of large fluctuation of the bearing layer at the pile end by adding post-grouting and addingthe wall brush to“break the wall”.

关 键 词：试验桩 单桩抗拔承载力特征值 持力层 后注浆 刷壁器“破壁” 

分 类 号：TU753.3[建筑科学—建筑技术科学]