深基坑锚索抗拔多循环加载试验研究  

Experimental Study on Pullout Resistance of Anchor Cables in Deep Foundation Pit under Multi-cyclic Loading

作　　者：欧曙光 邓署冬 刘洪智 尹小俊 OU Shuguang;DENG Shudong;LIU Hongzhi;YIN Xiaojun(GuangZhou Building Materials Institute Limited Company;Zhongshan Jukeyuan Test Co.,Ltd.)

机构地区：[1]广州市建筑材料工业研究所有限公司 [2]广东聚科源建设工程质量检测有限公司

出　　处：《广东建材》2024年第10期84-87,共4页Guangdong Building Materials

摘　　要：本文依托某深基坑支护工程,通过锚索抗拔多循环加载试验,得到各锚索的抗拔承载力符合设计要求。通过试验数据得到其Q-s曲线及相关拟合式,可为预测深基坑极限抗拔承载力提供参考。分析其弹塑性变形规律,同时总结荷载位移增量规律,确定其工作荷载,对该工程预应力锚索抗拔设计参数进行验证和优化,从而为现场施工提供指导。In this paper,based on a deep foundation pit support project,through multi-cycle loading test of anchor cable pull-out,the pull-out capacity of each anchor cable meets the design requirements.The Q-S curve and its fitting formula are obtained from the test data,which can provide a reference for predicting the ultimate uplift bearing capacity of deep foundation pit.This paper analyzes the elastic-plastic deformation law,summarizes the load-displacement increment law,determines its working load,and verifies and optimizes the pullout design parameters of the project's prestressed anchor cable,thus providing guidance for the field construction.

关 键 词：深基坑 预应力锚索 多循环加载 Q-S曲线 弹塑性变形 

分 类 号：TU753[建筑科学—建筑技术科学]